Qhov Twg Yuav Low Pass Lim rau xov tooj cua chaw nres tsheb?

 

 

FMUSER tau yog ib qho ntawm cov thawj coj xov tooj cua studio cov khoom lag luam rau ze li ib nrab xyoo pua. Txij li xyoo 2008, FMUSER tau tsim ib qho chaw ua haujlwm uas txhawb nqa kev sib koom tes zoo ntawm cov neeg ua haujlwm ntawm cov kws tsim qauv tsim qauv thiab cov pab pawg tsim khoom zoo. Los ntawm kev mob siab rau thiab kev mob siab rau kev sib koom tes tiag tiag, FMUSER muaj peev xwm tsim qee qhov kev sib koom ua ke hauv hluav taws xob tshiab tshaj plaws, siv lub sijhawm sim cov ntsiab lus ntawm nag hmo thiab suav nrog kev tshawb fawb qib siab niaj hnub no. Ib qho ntawm peb qhov kev ua tau zoo tshaj plaws, nrog rau kev xaiv nrov ntawm peb cov neeg siv khoom ntau, yog peb RF low pass lim rau xov tooj cua.

 

"Yog tias koj tab tom nrhiav cov khoom siv xov tooj cua tshaj lij rau kev muag khoom, vim li cas ho tsis xaiv ib qho ntawm cov khoom siv tshaj tawm xov xwm zoo tshaj plaws los ntawm FMUSER? Lawv npog tag nrho cov kev sib txuas ntawm cov xov tooj cua frequency lim cov rooj sib txoos, qee qhov ntawm lawv yog qhov tseem ceeb rau lub chaw nres tsheb xov tooj cua, piv txwv li, FM low pass filter, nrog rau ntau HPF kev muag khoom, BPF muag, BSF kev muag khoom, thiab cov lim dej qis qis rau muag xws li 88-108Mhz low pass lim rau muag. UHF thiab VHF lim xws li UHF bandpass lim thiab VHF bandpass lim, thiab tau kawg, lawv kuj muaj cov khoom siv xov tooj cua zoo rau kev muag khoom."

- - - - - James, loyal member of FMUSER

 

Qhov Tom ntej no yog Vim li cas RF Low Power Lim thiaj xav tau? | Hla

 

Dab tsi peb coj koj los ntawm nplooj ntawv no

 

Qhov twg yuav Low Pass Filter? Vim li cas Low Pass RF Lim thiaj xav tau? Yuav ua li cas cuam tshuam Harmonic thiab Spurious Emissions tshwm sim? Zoo tshaj RF Low Pass Lim rau muag  Yuav ua li cas xaiv qhov zoo tshaj plaws FM Harmonics Lim rau Xov Tooj Cua Chaw Nres Tsheb? Nthuav qhov tseeb txog RF Lim

 

 FMUSER 20kW FM Low Pass Lim Ua haujlwm zoo hauv:

 

• Cov xov tooj cua FM tshaj lij nyob rau hauv xeev, nroog, thiab hauv nroog
• Cov xov tooj cua FM nruab nrab thiab loj nrog kev pab cuam dav dav
• Kev tshaj lij FM xov tooj cua nrog ntau tshaj lab tus neeg tuaj saib
• Cov neeg ua haujlwm hauv xov tooj cua uas xav tau cov xov tooj cua turnkey ua tiav ntawm tus nqi qis

 

Ua tsaug rau lub ntiaj teb-chav kawm ntawv Hoobkas, FMUSER, raws li ib tug ua chaw tsim tshuaj paus ntawm Cov khoom siv tshaj tawm tshaj tawm, tau ua tiav kev pabcuam txhua yam ntawm cov neeg siv khoom los ntawm kev muab ua tiav cov kev daws teeb meem tshaj tawm rau ntau tshaj 10 xyoo, ib yam yog paub tseeb tias yog ib siab zog lowpass lim nrog 2nd thiab 3rd harmonics filtering feem ntau yog ua haujlwm los ua ke thiab cais cov xov tooj cua wireless los ntawm ntau lub xov tooj cua FM transmitters. 

 

"Tsis tuaj yeem hais tias FMUSER yog cov khoom siv xov tooj cua zoo tshaj plaws nyob hauv lub ntiaj teb, tab sis rau qee tus neeg ua haujlwm hauv xov tooj cua, yog, FMUSER yog qhov tseeb ntawm cov khoom siv thiab cov chaw tsim khoom. Cov khoom siv hauv xov tooj cua."

 

 - - - - - Peter, loyal member of FMUSER

 

▲ Qhov twg yuav qhov zoo tshaj plaws FM Low Pass Lim ▲

▲ Rov qab mus rau Cov Ntsiab Lus ▲

 

Vim li cas RF Low Power Lim thiaj xav tau rau lub chaw nres tsheb xov tooj cua?

 

Previous Part yog Qhov twg yuav qhov zoo tshaj plaws FM Low Pass Lim | Hla

Qhov Tom ntej no yog Yuav Ua Li Cas Tsis Txaus Siab Harmonic thiab Spurious Emissions tshwm sim | Hla

 

Ib qho tseem ceeb ntawm cov khoom siv hauv xov tooj cua

 

Nov yog qee qhov laj thawj vim li cas RF low pass lim yog tsim nyog rau kev lag luam hauv xov tooj cua:

 

• Harmonics thiab spurious emission tsis tuaj yeem zam tau, thiab lawv yuav cuam tshuam rau cov xov tooj cua hauv xov tooj cua sib txawv thiab txo cov xov tooj cua zoo thiab qhov ntawd yog tus nqi tseem ceeb ntawm coaxial low pass lim rau hauv xov tooj cua chaw nres tsheb.

 

• Yog tias koj tsis siv tus kws tshaj lij RF qis dhau lim dej, koj yuav raug rau txim los ntawm lub chaw tswj hwm xov tooj cua hauv zos (xws li FCC) rau tsim cov xov tooj cua cuam tshuam loj heev, piv txwv li, cov xov tooj ntawm cov tsis xav tau kev sib haum xeeb thiab cov emissions spurious tsim los ntawm koj lub FM thiab TV transmitter

 

• Xov tooj cua transmitters siv lub zog loj zaus tsawg dhau cov lim dej kom tsis txhob muaj kev sib raug zoo emissions uas yuav cuam tshuam rau lwm yam kev sib txuas lus.

 

• Txhawm rau tiv thaiv FM chaw nres tsheb transmitter harmonics: FM transmitters feem ntau tsim harmonics - ntau zaus ntawm transmitter. Qee qhov ua rau muaj kev cuam tshuam nrog VHF-tv thiab UHF-tv txais tos thiab paging thiab txais xov tooj ntawm tes. Qhov no series ntawm high-power low pass filters dhau los ntawm tag nrho cov FM zaus band nrog tsawg poob thiab muab ntau yam kev sib haum xeeb.

 

 

Yuav RF Harmonics Lim los ntawm FMUSER Tshaj Tawm

 

Qhov loj tshaj tus nqi ntawm cov RF Harmonics lim yog los pab cov xov tooj cua xaiv cov teeb liab uas yuav tsum tau siv. Tshwj xeeb tshaj yog rau cov xov tooj cua loj, yuav ua li cas muab cov neeg tuaj saib nrog cov xov tooj cua zoo tshaj plaws yam tsis raug rau txim los ntawm kev tswj hwm xov tooj cua hauv zos yog qhov yuav tsum tau ua ua ntej txhawm rau txhim kho kev sib tw ntawm cov phooj ywg hauv xov tooj cua thiab txhim kho cov khoom lag luam paub txog xov tooj cua.

 

FMUSER muaj harmonic lim xws li cov 20kW FM low pass filter rau transmitter hwj chim theem mus txog 20 kW. Ib qho qauv tsim tshwj xeeb muab 45 dB lossis ntau dua qhov tsis lees paub los ntawm qhov thib ob mus rau qhov thib kaum kev sib haum xeeb thiab dhau mus. Qhov no yields lim nrog tag nrho ntev ntawm 30% mus rau 50% luv dua li FM harmonic lim. 

 

Peb muaj qhov zoo tshaj plaws RF lim rau muag, yuav RF lim uas lub zog ntawm 500W txog 1000W los ntawm FMUSER! Tshwj xeeb, lawv yog 20kW FM low pass lim kev muag khoom (LPF) thiab 10kW VHF low pass lim rau muag (LPF), 10kW VHF bandstop lim kev muag khoom (BSF), 350W UHF digital bandpass lim rau muag, thiab ib qho ntawm peb cov khoom siv hauv xov tooj cua zoo tshaj plaws - FM bandpass lim rau muag.

 

Koj tuaj yeem pom txhua yam koj xav tau yog tias koj mus tshawb nrhiav, peb muaj FM bandpass lim Lub hwj chim ntawm 500W txog 1kW, tshwj xeeb, lawv yog 500W, 1500W, 3000W, 5000W, 10000W FM bandpass lim uas yog tsim tshwj xeeb rau cov xov tooj cua FM. Tsis tas li ntawd, kev kho kom haum yog muaj rau cov lim dej sib haum xeeb, tag nrho lawv nrog cov nqi siv nyiaj thiab kev ua haujlwm zoo, nug peb cov kev txhawb nqa, peb txhua tus pob ntseg!

 

Raws li ib qho ntawm cov kev tshaj tawm xov xwm tseem ceeb tshaj plaws ntawm FM / TV xov tooj cua, lub RF kab noj hniav lim yog qhov tsim nyog raws li FM / UHF / VHF combiner, xov tooj cua tshaj tawm xov tooj cua, xa xov tooj cua, thiab lwm yam khoom siv tshaj tawm hauv xov tooj cua. Nws tsis yog qhov exaggeration hais tias raws li cov khoom tseem ceeb ntawm RF passive cov khoom, cov ntxaij lim dej yog qhov tseem ceeb tshaj li lwm yam kev sib koom ua ke nyob rau hauv repeaters thiab hauv paus chaw nres tsheb.

 

Txawm li cas los xij, RF lim, piv txwv li, qhov tsawg dhau RF lim, yog ib qho khoom siv tsim nyog nyob rau sab kis ntawm qhov chaw tshaj tawm xov xwm txhawm rau txhawm rau ua kom muaj kev sib haum xeeb tsim los ntawm lub transmitter. Qhov no yog vim hais tias RF system cov neeg ua haujlwm thoob plaws ntiaj teb siv ntau zaus, yog li muaj ntau cov teeb meem tsis sib haum xeeb hauv huab cua, qee qhov yog rau TV, tub rog, lwm tus yog rau kev tshawb fawb huab cua thiab lwm lub hom phiaj.

 

▲ Vim li cas RF Lim thiaj xav tau rau lub chaw nres tsheb xov tooj cua ▲

▲ Rov qab mus rau Cov Ntsiab Lus ▲

 

Yuav ua li cas cuam tshuam Harmonic thiab Spurious Emissions tshwm sim?

 

Previous Part yog Vim li cas Low Pass RF Lim thiaj xav tau | Hla

Qhov Tom ntej no yog Zoo tshaj RF Harmonics Lim rau Muag | Hla

 

Dab tsi thab tag nrho RF engineers yog tias kev sib haum xeeb thiab spurious emissions tsis tuaj yeem zam tau. Rau cov neeg ua haujlwm hauv xov tooj cua, nws yog ib qho tseem ceeb heev kom nkag siab txog dab tsi harmonics thiab spurious emissions yog dab tsi, los yog yuav ua li cas lawv yog generated thiab yuav ua li cas txo lawv cov kev cuam tshuam.

 

Nyob rau tib lub sijhawm, nws tseem muaj txiaj ntsig zoo los tswj cov kev pabcuam hauv xov tooj cua zoo, FMUSER tus kws tshaj lij RF pab pawg tau piav qhia rau peb txog qee qhov kev paub txog kev sib haum xeeb thiab spurious emission.

 

Yog tias koj xav nkag siab ntxiv vim li cas cov chaw xov tooj cua xav tau kev lim dej RF, koj yuav xav tau cov ntsiab lus hauv qab no

 

Yuav ua li cas Harmonics Generated?

 

Frequencies uas tshwm sim ntawm ib tug ntau yam ntawm cov input zaus yog hu ua harmonics. Hauv lwm lo lus, kev sib haum xeeb yog qhov tsis xav tau kev sib kis, uas yog ntau yam ntawm qhov xav tau kev sib kis ntau zaus. Qhov kev sib kis tsis xav tau no tshwm sim ntawm qib qis zog dua li qhov xav tau sib kis.

 

Raws li peb txhua tus paub, muaj cov khoom siv tseem ceeb hauv xov tooj cua, uas yog, xov tooj cua transmitters. Txawm hais tias 1kW lossis 10kW transmitter yuav tsim tshwj xeeb, thiab cov khoom siv RF yooj yim ntawm lub transmitter yog nruab nrog lub lim lim, tab sis yuav luag txhua lub RF transmitter yuav tsim ib co kev sib raug zoo, Txawm tias cov kws tshaj lij wireless transmitter tsis tuaj yeem zam txhua qhov kev sib tsoo thiab kev yuam kev. tso pa tawm

 

Harmonics kuj tseem suav tias yog qhov ua rau muaj kev cuam tshuam RF. Qee qhov nthwv dej, xws li cov nthwv dej square, sawtooth nthwv dej, s, thiab daim duab peb sab nthwv dej, muaj ntau lub zog ntawm kev sib haum xeeb zaus.

 

Dab tsi yog Spurious Emission Generated?

 

Tsis zoo li harmonics, spurious emission tsis tshwm sim thaum lub input zaus yog ob npaug; Lawv tsis tau nthuav tawm ntawm lub hom phiaj. Spurious emission yog ib qho kev tso tawm tsis zoo, feem ntau hu ua txaws. Lawv yog cov tshwm sim ntawm intermodulation, electromagnetic cuam tshuam, zaus conversion, los yog harmonics.

 

▲ Yuav Ua Li Cas Tsis Txaus Siab Harmonic thiab Spurious Emissions tshwm sim ▲

▲ Rov qab mus rau Cov Ntsiab Lus ▲

 

Qhov zoo tshaj plaws RF Low Power Lim rau muag 

 

Previous Part yog Yuav ua li cas Harmonics thiab Spurious Emissions tshwm sim | Hla

Qhov Tom ntej no yog Yuav ua li cas xaiv qhov zoo tshaj plaws FM Harmonics Lim | Hla

 

Koj Xav Tau Qhov Tsawg Pass RF Lim Ntau dua li puas tau

 

Peb txhua tus paub tias cov xov tooj cua transmitters siv low pass RF lim los tiv thaiv kev sib raug zoo thiab spurious emissions uas yuav cuam tshuam nrog lwm yam kev sib txuas lus, thaum feem ntau FM transmitters tsim harmonics txawm nyob rau kaum ntawm lub sij hawm ntawm lub hauv paus zaus. 

 

Hmoov zoo, FMUSER 20kW FM low pass filter yog ib qhov zoo tshaj plaws RF system filtering sib dhos rau FM tshaj tawm zaus band. Txhawm rau pab txo qhov cuam tshuam los ntawm kev sib haum xeeb thiab spurious emission, FMUSER ntawm no nthuav tawm ib qho ntawm peb cov lim dej zoo sib haum xeeb-lub 20 kWm RF low pass lim rau FM xov tooj cua chaw nres tsheb.

 

Tsawg Pass RF Lim tsim tsuas yog rau qhov zoo tshaj plaws

 

Yog tias koj tsis xav kom cov kev sib raug zoo uas tsis xav tau poob rau hauv cov zaus zaus tsis cuam tshuam rau koj thiab ua rau muaj kev cuam tshuam loj (koj tuaj yeem tau txais ib pawg ntawm cov ntawv tsis txaus siab thiab raug txim los ntawm qee lub koom haum tswj hwm), piv txwv li, zaus ntawm TV channel lossis lwm lub xov tooj cua. Siv FMUSER 20kW RF low pass lim yog txoj hauv kev zoo tshaj los pab koj kom dim ntawm cov kev ntxhov siab thiab cov ntawv tsis txaus siab. 

 

 

• Extraordinary Harmonics Lim Muaj peev xwm

 

Qhov loj tshaj feature ntawm no siab zog low pass lim yog nws harmonic attenuation peev xwm - raws li cov ntaub ntawv xeem txhim khu kev qha ntawm FMUSER pawg xeem, qhov thib ob harmonic attenuation thiab siab dua harmonic attenuation ntawm no 20kW low pass RF lim tau mus txog feem ≥ 35 dB thiab ≥ 60 dB, uas yog qhov muaj zog sib haum xeeb lim dej rau lub chaw nres tsheb xov tooj cua. 

 

• Ntxiv-Low Insertion Poob

 

cov qis insertion poob ntawm FMUSER 20kW FM low pass filter ua rau nws tsim nyog rau qib zog txog li 20000 watts, uas txhais tau hais tias nrog lub lim RF zoo kawg no, koj tuaj yeem ua ke siv ntau lub xov tooj cua transmitters nrog lub zog sib txawv hauv xov tooj cua, thiab cov neeg tuaj saib tuaj yeem tau txais xov tooj cua nrog rau zoo tshaj plaws thiab considerably tsawg harmonics! Connector: 3 1/8 "siab tshaj tawm tswv yim zog 20kw

 

• Kev paub siv zoo tshaj plaws

 

Lub 20kW Low Pass lim rau muag, ua-nyob rau hauv nrog ib qho yooj yim txuas system, tshwj xeeb tshaj yog tsim rau FM xov tooj cua chaw nres tsheb. Xav txog qhov zoo tshaj plaws cov neeg siv kev paub, lub lim dej ua kom yooj yim kev koom ua ke rau hauv FM transmitters.

 

FMUSER muab cov kab tiav ntawm cov FM thiab UHF / VHF lim rau harmonics suppression nyob rau hauv xov tooj cua tshaj tawm cov chaw nres tsheb. 

 

Kev hais lus thoob ntiaj teb, peb xav pab cov neeg ua haujlwm hauv xov tooj cua los ntawm thoob plaws lub ntiaj teb kom cais cov xov tooj cua FM sib ze, peb pom tias qee qhov ntawm lawv muaj kev txaus siab rau kev sib txuas ntau lub FM zaus ntawm ib tus kav hlau txais xov, lwm tus xav kom muaj kev cai siv. rau lawv ntau transmitters nyob rau hauv lawv cov chaw nres tsheb. 20kW FM low pass filter, piv txwv li, yog ib qho ntawm peb qhov zoo tshaj plaws-muag FM harmonics lim siv rau combing FM xov tooj cua transmitters zog mus txog 20kW, tej zaum koj yuav pom tus txiv leej tub loj no nyob rau hauv ib co loj xov tooj cua FM.

 

Peb yeej ib txwm mloog koj qhov kev xav tau yog tias koj txaus siab rau ib qho ntawm peb cov khoom muag saum toj kawg nkaus RF harmonics lim. 

 

Xav tias koj xav tau ntau tshaj qhov koj pom

 

Raws li peb tau hais los saum no, peb yog ib qho zoo tshaj plaws xov tooj cua chaw nres tsheb khoom manufacturers nyob rau hauv lub ntiaj teb no cheeb tsam, dua li cov 20kW low pass RF lim, koj kuj tuaj yeem ntsib lwm tus Kev muag khoom zoo tshaj plaws RF lim hauv cov ntsiab lus hauv qab no. Zoo, zoo zoo thiab nyiaj txiag nqi raws li ib txwm.

 

Daim ntawv A. FM/VHF LPF Tsawg Pass Lim rau muag

 

Tom ntej no yog 10kW VHF Bandreject Filter VHF BSF Bandstop Lim flos yog Muag | Hla

 

Classification	qauv	Max. Tswv yim fais fab	VSWR	Zaus ntau yam	Kev Tiv Thaiv	2nd harmonic	3rd harmonic	connectors	Mus saib ntxiv
FM	A	20 kW	≤ 1.1	87 - 108 MHz		≥ 35 dB	≥ 60 dB	3 1 / 8 "	ntau
VHF	B	10 kW	≤ 1.1	167 - 223 MHz		≥ 35 dB	≥ 60 dB	3 1 / 8 "	ntau

 

Daim duab B. 10kW VHF BSF Bandstop Bandreject Lim kev muag khoom

 

Tus Previous yog FM/VHF LPF Low Pass Lim rau muag | Hla

Tom ntej no yog 350W UHF DTV BPF Bandpass Lim kev muag khoom | Hla

 

Classification	qauv	Max. Tswv yim fais fab	VSWR	fv	f0 ± 4MHz	Zaus ntau yam	Kev Tiv Thaiv	fv-4.43 ± 0.2 MHz	connectors	Mus saib ntxiv
VHF	A	10 kW		≤ 1.1	≤ 1.1	167 - 223 MHz		≥ 20 dB	3 1 / 8 "	ntau

 

Daim ntawv C. 350W UHF DTV BPF Bandpass Lim rau muag

 

Tus Previous yog 10kW VHF BSF Bandstop Bandreject Lim kev muag khoom | Hla

Tom ntej no yog FM BPF Bandpass Lim kev muag khoom | Hla

 

Classification

qauv

Max. Tswv yim fais fab

Kab noj

VSWR

zoo tsis

f0

f0 ± 3.8MHz

f0 ± 4.2MHz

f0 ± 6MHz

f0 ± 12MHz

Mus saib ntxiv

UHF

A

350W

6

≤ 1.15

474 MHz

≤ 0.50 dB

≤ 1.3dB ib

≥ 8 dB

≥ 20 dB

≥ 40 dB

ntau

858 MHz

≤ 0.60 dB

≤ 1.65 dB

≥ 8 dB

≥ 20 dB

≥ 40 dB

ntau

 

Daim duab D. FM BPF Bandpass Lim kev muag khoom

 

Tus Previous yog 350W UHF DTV BPF Bandpass Lim kev muag khoom | Hla

Tom ntej no yog VHF BPF Bandpass Lim kev muag khoom | Hla

 

Classification

qauv

Max. Tswv yim fais fab

Kab noj

VSWR

Zaus ntau yam

zoo tsis

f0

f0 ± 300kHz

f0 ± 2MHz

f0 ± 4MHz

connectors

Mus saib ntxiv

FM

A

500W

3

≤ 1.1

87 - 108 MHz

0.70 dB

0.75 dB

≥ 25 dB cov

≥ 40 dB cov

7-16 IB

ntau

FM

A1

500W

4

≤ 1.1

87 - 108 MHz

1.10 dB

1.20 dB

≥ 40 dB cov

≥ 60 dB cov

7-16 IB

ntau

FM

A

1500W 1.5 kWm

3

≤ 1.1

87 - 108 MHz

zoo tsis

0.30 dB

0.35 dB

≥ 25 dB cov

≥ 40 dB cov

7-16 IB

ntau

FM

A1

1500W 1.5 kWm

4

≤ 1.1

87 - 108 MHz

0.50 dB

0.60 dB

≥ 40 dB cov

≥ 60 dB cov

7-16 IB

ntau

FM

A

3000W 3 kWm

3

≤ 1.1

87 - 108 MHz

zoo tsis

0.25 dB

0.30 dB

≥ 25 dB cov

≥ 40 dB cov

1 5 / 8 "

ntau

FM

A1

3000W 3 kWm

4

≤ 1.1

87 - 108 MHz

0.40 dB

0.45 dB

≥ 40 dB

≥ 60 dB cov

1 5 / 8 "

ntau

FM

A

5000W 5 kWm

3

≤ 1.1

87 - 108 MHz

zoo tsis

0.20 dB

0.25 dB

≥ 25 dB

≥ 40 dB cov

1 5 / 8 "

ntau

FM

A1

5000W 5 kWm

4

≤ 1.1

87 - 108 MHz

0.35 dB

0.40 dB

≥ 40 dB cov

≥ 60 dB cov

1 5 / 8 "

ntau

FM

A

10000W 10 kWm

3

≤ 1.1

87 - 108 MHz

zoo tsis

0.15 dB

0.15 dB

≥ 25 dB cov

≥ 40 dB cov

3 1 / 8 "

ntau

FM

A1

10000W 10 kWm

4

≤ 1.1

87 - 108 MHz

0.25 dB

0.30 dB

≥ 40 dB

≥ 60 dB cov

3 1 / 8 "

ntau

 

Chart E. VHF BPF Bandpass Lim rau Muag

 

Tus Previous yog FM BPF Bandpass Lim kev muag khoom | Hla

Rov los FM/VHF LPF Low Pass Lim rau muag | Hla

 

Classification

qauv

Max. Tswv yim fais fab

Kab noj

VSWR

Zaus ntau yam

zoo tsis

f0

f0 ± 300kHz

f0 ± 2MHz

f0 ± 4MHz

connectors

Mus saib ntxiv

VHF

A

500W

4

≤ 1.1

167-223 MHz

0.40 dB

0.50 dB

≥ 20 dB cov

≥ 35 dB cov

7-16 IB

ntau

VHF

A1

500W

6

≤ 1.1

167-223 MHz

0.80 dB

1.00 dB

≥ 50 dB cov

≥ 70 dB cov

7-16 IB

ntau

VHF

A

1500W 1.5 kWm

4

≤ 1.1

167-223 MHz

zoo tsis

0.15 dB

0.20 dB

≥ 20 dB cov

≥ 35 dB cov

1 5 / 8 "

ntau

VHF

A1

1500W 1.5 kWm

6

≤ 1.1

167-223 MHz

0.25 dB

0.30 dB

≥ 50 dB cov

≥ 70 dB cov

1 5 / 8 "

ntau

VHF

A

3000W 3 kWm

3

≤ 1.1

167-223 MHz

zoo tsis

0.10 dB

0.15 dB

≥ 10 dB cov

≥ 20 dB cov

1 5 / 8 "

ntau

VHF

A1

3000W 3 kWm

4

≤ 1.1

167-223 MHz

0.20 dB

0.25 dB

≥ 20 dB cov

≥ 35 dB cov

1 5 / 8 "

ntau

VHF

A

5000W 5 kWm

3

≤ 1.1

167-223 MHz

zoo tsis

0.10 dB

0.10 dB

≥ 10 dB cov

≥ 20 dB cov

1 5 / 8 "

ntau

VHF

A1

5000W 5 kWm

4

≤ 1.1

167-223 MHz

0.15 dB

0.20 dB

≥ 20 dB cov

≥ 35 dB cov

1 5 / 8 "

ntau

VHF

A

10000W 5 kWm

3

≤ 1.1

167-223 MHz

zoo tsis

0.10 dB

0.10 dB

≥ 10 dB cov

≥ 20 dB cov

3 1 / 8 "

ntau

VHF

A1

10000W 5 kWm

4

≤ 1.1

167-223 MHz

0.15 dB

0.20 dB

≥ 20 dB cov

≥ 35 dB cov

3 1 / 8 "

ntau

 

Yuav RF Harmonics Lim rau Xov Tooj Cua? Nov yog Qhov Chaw Zoo!

 

FMUSER yog ib qho zoo tshaj plaws RF lim manufacturers uas tsim harmonics lim rau muag nyob ze 200+ lub teb chaws thiab cheeb tsam thoob plaws ntiaj teb, ntawm no yog cov teb chaws uas koj tuaj yeem siv tau.

 

Afghanistan, Albania, Algeria, Andorra, Angola, Antigua thiab Barbuda, Argentina, Armenia, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bhutan, Bolivia, Bosnia thiab Herzegovina, Bots , Brazil, Brunei, Bulgaria, Burkina Faso, Burundi, Cabo Verde, Cambodia, Cameroon, Canada, Central African koom pheej, Chad, Chile, Tuam Tshoj, Colombia, Comoros, Congo, Democratic Republic of the, Congo, Republic of the, Costa Rica , Côte d'Ivoire, Croatia, Cuba, Cyprus, Czech koom pheej, Denmark, Djibouti, Dominica, Dominican koom pheej, East Timor (Timor-Leste), Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Eswatini, Ethiopia, Fiji, Finland, Fabkis, Gabon, Gambia, Georgia, Lub Tebchaws Yelemees, Ghana, Greece, Grenada, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Honduras, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel , Ltalis, Jamaica, Nyiv, Jordan, Kazakhstan, Kenya, Kiribati, Kauslim Teb, Kaus Lim Qab Teb, Kosovo, Kuwait,Kyrgyzstan, Laos, LATVia, Lebanon, Lesotho, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Marshall Islands, Mauritania, Mauritius, Mexico, Micronesia, Federated States of, Moldova, , Mongolia, Montenegro, Morocco, Mozambique, Myanmar (Burma), Namibia, Nauru, Nepal, Netherlands, New Zealand, Nicaragua, Niger, Nigeria, North Macedonia, Norway, Oman, Pakistan, Palau, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Poland, Portugal, Qatar, Romania, Russia, Rwanda, Saint Kitts thiab Nevis, Saint Lucia, Saint Vincent thiab Grenadines, Samoa, San Marino, Sao Tome thiab Principe, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, Spain, Sri Lanka, Sudan, Sudan, Sab Qab Teb, Suriname, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Tanzania, Thaib, Togo, Tonga, Trinidad thiab Tobago , Tunisia, Qaib ntxhw, Turkmenistan, Tuvalu, Uganda, Ukraine, United Arab E Mirates, United Kingdom, United States, Uruguay, Uzbekistan, Vanuatu, Vatican City, Venezuela, Nyab Laj, Yemen, Zambia, Zimbabwe

 

Peb Ib txwm nyob ntawm no rau koj cov kev xav tau

 

Puas yog koj tseem xav txog cov RF harmonics lim tus nqi? Peb tsim thiab tsim cov peev nyiaj thiab pheej yig harmonics lim rau xov tooj cua chaw nres tsheb, los ntawm LPF low pass filters rau bandstop cov ntxaij lim dej thiab FM / UHF / VHF bandpass lim, thiab lwm yam

 

Sau nyob rau hauv daim ntawv "Hu rau peb" nyob rau sab laug thiab qhia rau peb paub koj cov specifications xav tau, ib qho ntawm peb cov kev paub txog kev muag khoom yuav teb tam sim ntawd thiab pab xaiv ib qho FM/TV harmonics lim uas ua tau raws li qhov koj xav tau, tshwj xeeb tshaj yog rau cov lus nug zoo li cov khoom muag qis tshaj plaws rau kev muag khoom, bandpass lim customization, ua tiav lim turnkey tov, thiab lwm yam. Zoo, cov lus nug ib txwm muaj xws li nqe, lub sijhawm xa khoom, lossis specs tseem nug tau dawb. Hais qhov koj xav tau, Peb ib txwm mloog.

 

▲ Zoo tshaj RF Harmonics Lim rau Muag  ▲

▲ Rov qab mus rau Cov Ntsiab Lus ▲

 

Yuav ua li cas xaiv qhov zoo tshaj plaws FM Harmonics Lim rau Xov Tooj Cua Chaw Nres Tsheb?

 

Previous Part yog Zoo tshaj RF Harmonics Lim rau Muag | Hla

Qhov Tom ntej no yog Nthuav qhov tseeb thiab Q&A txog RF Lim | Hla

 

Ib txhia ntawm peb cov neeg muaj kev tsis ntseeg zoo li, Kuv tsis paub tiag tiag yuav xaiv qhov zoo li cas RF harmonics lim, los yog kuv xav tau ob hom harmonics lim tab sis kuv tsuas muaj 50K$ rau kev yuav, thiab lwm yam.

 

Raws li kev tshawb fawb txog kev lag luam zoo ntawm FMUSER harmonics lim, peb pom tias cov khoom muag saum toj kawg nkaus RF harmonic lim muaj cov yam ntxwv hauv qab no sib xws:

 

1. Ntau yam lim Customization thiab OEM txais tos

 

Kev hloov kho thiab tsim cov lim dej qhia txog kev muaj tswv yim ntawm cov khoom siv tshaj tawm hauv xov tooj cua thiab kev ua tau zoo ntawm cov khoom siv tshaj tawm. Ib qho zoo heev RF harmonics lim yuav tsum muaj cov yam ntxwv ntawm cov nqi siv nyiaj, kev pab lub neej ntev. FMUSER 20kW FM low-pass lim tshwm sim kom yooj yim-siv thiab tus nqi-phooj ywg rau cov neeg ua haujlwm hauv xov tooj cua

 

2. Muaj tsawg kawg yog 1 PCS Tsim thiab Kev Pabcuam Kev Cai

 

Tsim thiab kho qhov kev pabcuam yog muab rau qhov tsawg kawg nkaus ntawm 1 pcs Lim. Vim tias cov neeg siv xov tooj cua sib txawv yuav tsum tau ntsib qhov xav tau tiag tiag ntawm ntau lub xov tooj cua, txawm tias tus neeg xa khoom lim RF tuaj yeem hloov kho thiab tsim cov ntxaij lim dej tau dhau los ua ib qho ntawm cov qauv los ntsuas lub peev xwm ntawm cov neeg xa khoom lim. Vim li cas FMUSER tsuas yog sawv tawm los ntawm ntau tus neeg xa khoom lim dej feem ntau vim tias lawv cov lim RF tuaj yeem hloov kho, ua haujlwm siab, tus nqi siv nyiaj, thiab siv tau yooj yim. Tsis muaj teeb meem ntau npaum li cas cov ntxaij lim dej siab kawg uas koj xav kho, FMUSER tuaj yeem ua haujlwm rau koj ib txwm

 

3. RF Harmonics Lim Kev Yuav Khoom los ntawm FMUSER

 

Yuav xaiv li cas Sab saum toj RF harmonics lim ntawm cov khoom siv hauv xov tooj cua hauv lub xyoo 2021 tau yog qhov teeb meem xav tau rau ntau tus neeg siv khoom FMUSER tshiab thiab qub.

 

Tom qab txoj kev tshawb fawb ntawm peb pab neeg ua haujlwm, peb pom tias qee qhov kev ua haujlwm tseem tuaj yeem pab koj xaiv, peb kuj koom nrog hauv kev ua si, mob siab los muab peb cov lim dej zoo tshaj plaws rau koj, yog li, yog tias koj xav tau. RF harmonic lim rau muag los yog xav tau tej ntaub ntawv hais txog qhov tseeb harmonic filters nqi los ntawm FMUSER, thov paub qhov ntawd Peb ib txwm mloog!  

 

• Qhov qis dua Pim lub zog lub teeb liab

 

Piv txwv li, PIM (AKA: Passive Intermodulation), peb paub tias PIM yog qhov tshwm sim ntawm cov teeb meem tsis muaj txiaj ntsig uas tsim los ntawm kev sib xyaw ntawm ob lossis ntau zaus hauv cov khoom siv tsis muaj kab mob. Cov teeb liab tshiab no yuav cuam tshuam thiab cuam tshuam cov teeb liab thawj kis ntawm ob lub tshuab wireless. Nws tuaj yeem tsim teeb liab cuam tshuam hauv txhua qhov system wireless. Tsawg PIM txhais tau hais tias muaj lub teeb liab muaj zog nrog ntau bandwidth rau cov neeg siv ntau dua, uas txhais tau tias cov neeg siv khoom txaus siab thiab cov nyiaj tau los ntau dua rau cov neeg siv khoom.

 

• Koj yuav xav tau qis Insertion poob thiab rov qab poob

 

Insertion poob thiab rov poob ua lub luag haujlwm tseem ceeb hauv kev tsim thiab tsim cov khoom siv ntau zaus xws li RF lim, RF fais fab faib, thiab RF amplifiers. Nws yog ib qho tshwm sim uas tshwm sim hauv txhua hom kev sib kis (cov ntaub ntawv xa mus lossis hluav taws xob xa mus). Txij li qhov no muaj tseeb rau yuav luag tag nrho cov kab sib kis ntawm lub cev lossis txoj kev coj mus, qhov ntev ntawm txoj kev, qhov poob siab dua. Tsis tas li ntawd, cov kev poob no tseem yuav tshwm sim ntawm txhua qhov kev sib txuas ntawm kab, nrog rau cov pob qij txha thiab cov khoom sib txuas. Rau kev sib sau ua ke ntau zaus xws li RF lim, cov lim dej uas tsis muaj qhov tsis zoo thiab lwm cov ntsiab lus muag zoo nkauj feem ntau tuaj yeem yog thawj qhov kev xaiv rau cov neeg siv xov tooj cua.

 

• Nws yog ntau tshaj qhov koj pom

 

Pom tau tias, muaj cov ntaub ntawv tseem ceeb ntau dua li Insertion poob, lwm yam tsis xws li cov nqi sib txuas thiab kev tuav lub zog siab, thiab lwm yam kuj tseem yog ib qho tseem ceeb thaum yuav lub lim zoo RF harmonics. Yog tias koj xav tau cov ntaub ntawv pub dawb ntxiv txog RF harmonics lim, thov hu rau peb cov kws tshaj lij, lawv yog 7/24 online tos koj cov xov xwm zoo. Nov yog qhov pab pawg kws tshaj lij FMSUER qhia:

 

• Kev txo qis lim qhov ntev nrog tus nqi sib tw Cov khoom zoo meej rau ntau hom xov tooj cua microwave zaus, xws li Telecommunication system, IEEE 802.
• Zoo kub stability
• High zog tuav thiab zoo heev attenuation tus nqi
• Etc.

 

Rau Kev Tiv Thaiv FM Chaw Nres Tsheb Transmitter Harmonics: FM transmitters feem ntau tsim kom muaj kev sib haum xeeb - ntau ntawm cov zaus transmitter. Qee qhov no ua rau cuam tshuam rau VHF-TV thiab UHF-TV txais tos thiab paging thiab xov tooj cua txais xov tooj ntawm tes. Qhov no series ntawm cov ntxaij lim dej uas tsis tshua muaj dhau tag nrho FM band nrog qhov poob qis thiab muab kev sib haum xeeb ntau heev.

 

▲ Yuav ua li cas xaiv qhov zoo tshaj plaws FM Harmonics Lim ▲

▲ Rov qab mus rau Cov Ntsiab Lus ▲

 

Nthuav qhov tseeb thiab Q&A txog RF Lim

 

Previous Part yog Yuav ua li cas xaiv qhov zoo tshaj plaws FM Harmonics Lim | Hla

Rov qab mus rau Thawj Ntu Qhov twg yuav qhov zoo tshaj plaws FM Low Pass Lim | Hla

 

Yog tias koj xav paub ntau ntxiv txog cov qauv hauv Circuit Court lossis kev lag luam sib koom ntawm RF lim, FMUSER xav kom koj kawm txog cov khoom siv hluav taws xob tsis zoo lossis nug peb pawg neeg muag khoom ncaj qha, vim tias cov ntsiab lus koj tau nyeem tsis txaus los piav qhia RF lim kom meej thiab meej rau koj. (PS: Wikipedia tej zaum yuav ua tsis tau). Yog li ntawd, txhua yam peb ua tau rau koj yog kom yooj yim thiab vividly piav txog cov qauv thiab hom RF lim, thiab yuav ua li cas RF lim ua haujlwm. Ntawm no, FMUSER teev qee cov lus nug nthuav txog RF Lim uas tau tsa los ntawm peb cov neeg siv khoom hauv xov tooj cua, thiab tau kawg peb cov lus teb. Thov nyeem ntxiv Yog tias koj xav paub ntau ntxiv txog RF lim. 

 

Q1: Yuav ua li cas RF lim ua hauj lwm lwm txoj kev tshwj tsis yog nyob rau hauv FM / TV chaw nres tsheb?

 

RF Lim yog cov khoom tseem ceeb hauv kev siv tshuab wireless, RF lim tau siv nrog lub xov tooj cua txais xov tooj cua kom tsuas yog hom frequencies thiaj li muaj kev lom zem thaum lim tawm lwm qhov tsis xav tau ntawm ntau zaus. RF cov ntxaij lim dej yog tsim los rau hauv ib txoj hauv kev uas lawv tuaj yeem ua haujlwm tau yooj yim ntawm ntau zaus uas muaj xws li megahertz thiab gigahertz. Vim nws cov yam ntxwv ua haujlwm, nws feem ntau siv hauv cov khoom siv xws li xov tooj cua tshaj tawm, kev sib txuas lus wireless, thiab TV, thiab lwm yam.

 

RF cov ntxaij lim dej tuaj yeem lim tawm cov suab nrov lossis txo qhov cuam tshuam ntawm cov teeb liab sab nraud uas tuaj yeem cuam tshuam qhov zoo lossis kev ua haujlwm ntawm txhua qhov kev sib txuas lus. Qhov tsis muaj cov ntxaij lim dej RF tsim nyog nyob rau hauv qhov chaw tuaj yeem ua rau muaj kev cuam tshuam rau kev hloov pauv ntawm cov teeb liab zaus uas tuaj yeem ua rau mob rau txoj kev sib txuas lus.

 

Nrog rau txoj cai RF lim nyob rau hauv qhov chaw, kev cuam tshuam sab nraud nrog rau cov teeb liab cuam tshuam uas tsim los ntawm cov neeg nyob sib ze sib txuas lus tuaj yeem cuam tshuam tau yooj yim. Qhov no khaws cia qhov zoo ntawm qhov xav tau teeb liab frequencies thaum lim tawm tag nrho cov teeb liab tsis xav tau nrog yooj yim.

 

Vim li no, RF cov ntxaij lim dej ua lub luag haujlwm tseem ceeb hauv kev sib txuas lus wireless, xws li satellite, radar, mobile wireless system, thiab lwm yam. 

 

Feem ntau, cov ntxaij lim dej yog lub teeb yuag thiab tuaj yeem pab txhawb kev ua haujlwm ntawm lub teeb liab zaus. Nyob rau hauv rooj plaub uas RF cov ntxaij lim dej ua tsis tau raws li qhov yuav tsum tau ua, koj tuaj yeem tshawb xyuas ntau yam kev xaiv, ib qho ntawm qhov sib ntxiv ntawm lub amplifier rau koj tus qauv tsim. Los ntawm Trellisware amplifier mus rau lwm yam RF fais fab amplifiers, koj tuaj yeem hloov cov teeb liab qis dua mus rau qhov siab dua; yog li boosting tag nrho cov kev ua tau zoo ntawm RF tsim.

 

Tsis tas li ntawd, RF cov ntxaij lim dej ua lub luag haujlwm tseem ceeb hauv lub xov tooj ntawm tes ib puag ncig. Thaum nws los txog rau mobiles, lawv xav tau ib tug npaum li cas ntawm bands ua tau zoo. Nrog rau qhov tsis muaj RF lim kom zoo, ntau lub bands yuav tsis raug tso cai nyob ua ke ib txhij, uas txhais tau hais tias qee lub bands yuav raug tsis lees paub, piv txwv li Ntiaj Teb Kev Tshawb Fawb Satellite System (GNSS), pej xeem kev nyab xeeb, Wi-Fi, thiab ntau dua. Ntawm no, RF cov ntxaij lim dej ua lub luag haujlwm tseem ceeb los ntawm kev tso cai rau txhua pawg sib koom ua ke nyob rau tib lub sijhawm.

 

Ua tsaug rau kev loj hlob R&D kev loj hlob ntawm FMUSER, peb npog ntau ntau cov ntxaij lim dej sib txawv rau koj, thov nco ntsoov tiv tauj peb pab pawg muag khoom Yog tias koj tsis paub tseeb tias qhov twg yog qhov zoo tshaj plaws rau koj qhov chaw tshaj tawm xov xwm, peb cov neeg muag khoom thiab cov kws tshaj lij yuav tos Nrog txhua pob ntseg.

 

Q2: Koj Yuav Ua Li Cas RF Lim?

 

Feem ntau, RF cov ntxaij lim dej yog tsim los ntawm kev sib txuas ntawm cov resonators thiab tsim nrog cov khoom siv hluav taws xob tsis zoo xws li capacitors, inductors, thiab (tsawg zaus) RF transformers, uas yog cov sib txuas inductors. Cov lim dej feem ntau yog linear, thiab thaum nws xav tau qee yam kev nthuav dav lawv tuaj yeem ua ke nrog RF amplifiers siv nrog RF transistors (xws li bipolar lossis field-effect). Cov lim dej yog qhov tsim nyog thaum nws los lim tawm cov cim tsis xav tau los ntawm kev nkag mus rau hauv xov tooj cua spectrum. Lawv siv ua ke nrog ntau yam khoom siv hluav taws xob. Txawm li cas los xij, nws qhov tseem ceeb tshaj plaws yog siv los ntawm lub xov tooj cua zaus.

 

Rau cov lim dej qis, nws cov Circuit Court uas tso cai rau cov khoom siv tsawg dhau thiab thaiv tag nrho lwm cov khoom siv ntau zaus hu ua low pass filter. Lub npe LPF nws tus kheej qhia qhov tsawg zaus.

 

Raws li daim ntawv thov thiab qhov loj ntawm cov khoom siv wireless, muaj ntau hom lim, xws li kab noj hniav lim dej, cov lim dej lim dej, cov lim dej electroacoustic, cov lim dej dielectric, cov lim coaxial (tsis hais txog coaxial cable), thiab lwm yam.

 

FMUSER yog cov chaw tsim khoom lag luam RF harmonics lim. Peb muaj cov cuab yeej tshaj lij tshaj lij tshaj tawm xov xwm kev paub tshwj xeeb thiab pab pawg ua haujlwm. Yog tias koj muaj lus nug txog RF lim thaum nyeem qhov kev qhia no, zoo siab txais tos nug peb pab neeg technical rau kev txhawb nqa.

 

Q3: Muaj pes tsawg hom RF lim muaj thiab lawv yog dab tsi?

 

Xov tooj cua Frequency filters yog ib yam tshwj xeeb ntawm Circuit Court uas tso cai rau cov teeb liab kom dhau thaum lawv tshem tawm cov teeb liab uas tsis xav tau. Thaum nws los txog rau lub lim topology, muaj plaub yam yooj yim RF lim hom, piv txwv li; siab dhau; band-pass; thiab band-reject (los yog notch filters). Cov lim dej RF feem ntau muaj cov qauv ntaiv, thiab "txoj hauj lwm" ntawm cov khoom (inductors thiab capacitors) yog qhov txhais lawv hom; qhov tseem ceeb ntawm cov khoom txhais tau hais tias qhov ntau ntawm cov teeb liab zaus (es) lawv thaiv lossis tsis thaiv.

 

• Low Pass Filter - Lowpass Lim - LPF

 

Cov lim dej qis yog qhov uas tsuas yog tso cai rau cov zaus tsawg dhau los ntawm tib lub sijhawm, txo qis txhua lwm cov teeb liab zaus. Qhov kev txo qis ntawm cov teeb liab zaus thaum nws dhau los ntawm bandpass yog txiav txim siab los ntawm ntau yam xws li lim topology, layout, thiab zoo ntawm cov khoom, thiab lwm yam. Tsis tas li ntawd, lub lim topology kuj txiav txim siab sai npaum li cas cov lim yuav hloov ntawm lub passband thiaj li mus cuag nws qhov kawg tsis lees paub.

 

 

 

Low pass filters tuaj nyob rau hauv ntau yam sib txawv. Daim ntawv thov tseem ceeb ntawm cov lim dej no yog kev tawm tsam ntawm RF amplifier's harmonics. Cov yam ntxwv no tseem ceeb heev vim tias nws pab tiv thaiv kev cuam tshuam tsis zoo thaum nws los txog rau ntau yam kev sib kis. Feem ntau, cov ntxaij lim dej qis dhau yog siv hauv cov ntawv thov suab thiab lim tawm suab nrov los ntawm ib qho chaw sab nraud. Tom qab lub high-frequency signals raug lim, lub resulting teeb liab frequencies tau ib tug crisp thiab meej zoo.

 

• High Pass Filter - Highpass Lim - HPF

 

Raws li qhov tsis zoo ntawm cov lim dej qis, qhov siab dhau lim (HPF) tsuas yog tso cai rau lub teeb liab ntau dhau los. Qhov tseeb, cov ntxaij lim dej siab dhau yog qhov ua tau zoo heev rau cov lim dej qis qis vim tias ob qho tib si tuaj yeem siv ua ke los tsim cov lim bandpass. Tus tsim ntawm lub siab pass lim yog ncaj nraim thiab attenuates lub frequencies uas yog qis dua ib tug pib point.

 

 

 

Feem ntau, cov ntxaij lim dej siab dhau yog siv nyob rau hauv lub tshuab suab los ntawm txhua qhov qis zaus raug lim tawm. Tsis tas li ntawd, nws yog siv los tshem tawm cov ntses bass thaj tsam hauv cov neeg hais lus me me, thiab ntau zaus; cov ntxaij lim dej no tshwj xeeb tsim rau hauv cov neeg hais lus. Txawm li cas los xij, yog tias nws los txog rau ib txoj haujlwm DIY, cov lim dej siab dhau tuaj yeem yooj yim xaim rau hauv qhov system.

 

• Band Pass Filter - Bandpass Lim - BPF

 

Lub bandpass lim (BPF) yog ib lub voj voog uas tso cai rau cov teeb liab los ntawm ob qhov sib txawv ntawm qhov sib txawv kom dhau mus thiab txo cov teeb liab uas tsis tuaj nyob rau hauv nws qhov kev lees paub. Feem ntau ntawm cov lim lim bandpass nyob ntawm txhua qhov chaw siv hluav taws xob sab nraud thiab siv cov khoom siv hluav taws xob, piv txwv li kev sib xyaw ua ke thiab cov transistors. Cov lim zoo li no yog hu ua active bandpass filters. Ntawm qhov tod tes, qee qhov band hla cov lim siv tsis muaj lub zog hluav taws xob sab nraud thiab vam khom rau cov khoom siv tsis zoo, piv txwv li inductors thiab capacitors. Cov lim no hu ua passive bandpass filters.

 

 

Band pass lim yog feem ntau siv hauv wireless receivers thiab transmitters. Nws lub luag haujlwm tseem ceeb hauv lub tshuab xa hluav taws xob yog txwv tsis pub cov teeb liab tso tawm bandwidth mus rau qhov tsawg kawg nkaus kom cov ntaub ntawv tsim nyog tuaj yeem xa tawm ntawm qhov xav tau ceev thiab daim ntawv. Thaum nws los txog rau lub receiver, lub band pass lim tso cai tsuas yog ib tug txaus tus nqi ntawm frequencies yuav tsum tau decoded los yog hnov, thaum txiav lwm yam teeb liab los ntawm pliaj frequencies.

 

 

Tag nrho cov nyob rau hauv tag nrho, thaum lub bandpass lim tau zoo tsim, nws tuaj yeem yooj yim ua kom zoo tshaj plaws ntawm cov teeb liab, thaum tib lub sijhawm, nws tuaj yeem txo qhov kev sib tw lossis cuam tshuam ntawm cov teeb liab.

 

• Band Reject Filter - Band Stop Filter - Reject Filter - BSF

 

Qee lub sij hawm hu ua band nres lim (BSF), band tsis lees paub yog lub lim uas tso cai rau feem ntau ntawm cov zaus dhau los ntawm qhov tsis hloov pauv. Txawm li cas los xij, nws attenuates xws frequencies uas poob qis dua ib qho tshwj xeeb. Nws ua haujlwm raws nraim li qhov tsis sib xws rau ntawm lub lim bandpass.

 

 

Yeej, nws txoj haujlwm yog dhau los ntawm cov zaus ntawm xoom mus rau thawj qhov kev txiav tawm ntawm zaus. Nyob rau hauv nruab nrab, nws dhau tag nrho cov frequencies uas yog siab tshaj qhov thib ob txiav-tawm point ntawm zaus. Txawm li cas los xij, nws tsis lees paub lossis thaiv tag nrho lwm cov zaus uas nyob nruab nrab ntawm ob lub ntsiab lus no.

 

 

Txhua yam nyob rau hauv tag nrho, lub lim yog ib yam dab tsi uas tso cai rau cov teeb liab hla nrog kev pab los ntawm passband. Uas tau hais tias, qhov nres nres hauv lub lim yog qhov chaw uas qee zaus raug tsis lees paub los ntawm cov lim dej. Txawm hais tias nws yog high pass, low pass, los yog bandpass, lub zoo tagnrho lim yog ib qho uas tsis muaj kev poob rau hauv passband. Txawm li cas los xij, hauv kev muaj tiag, tsis muaj qhov zoo tshaj plaws lim zoo li lub bandpass yuav ntsib qee zaus poob thiab nws tsis muaj peev xwm ua kom muaj kev tsis lees paub tsis kawg thaum nws los txog rau qhov nres.

 

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