Xov xwm

Dab tsi yog ibRF lim?

Xov tooj cua zaus lim yog ib feem tseem ceeb ntawm wireless technology. Nws yog siv ua ke nrog lub xov tooj cua receiver los lim lwm cov zaus tsis tsim nyog thiab tsuas yog tau txais qhov tseeb zaus. RF cov ntxaij lim dej yog tsim los ua haujlwm yooj yim hauv ntau zaus los ntawm qhov nruab nrab zaus mus rau qhov siab heev (xws li megahertz thiab gigahertz). Vim nws cov yam ntxwv ua haujlwm, nws feem ntau siv hauv xov tooj cua, kev sib txuas lus wireless, TV thiab lwm yam khoom siv.

Feem ntau, feem ntau RF cov ntxaij lim dej yog tsim los ntawm kev sib txuas ntawm cov resonators, thiab lawv cov yam ntxwv zoo tuaj yeem txiav txim siab qib lim hauv RF. Raws li daim ntawv thov thiab qhov loj ntawm cov khoom siv wireless, muaj ntau hom lim, xws li kab noj hniav lim, dav hlau lim, electroacoustic lim, dielectric lim, coaxial lim (ywj siab ntawm coaxial cable), thiab lwm yam.

Basic Hom Xov Tooj Cua Lim Lim

Lub RF lim yog ib qho tshwj xeeb Circuit Court uas tso cai rau cov teeb liab kom dhau los thaum tshem tawm cov cim tsis xav tau. Nyob rau hauv cov nqe lus ntawm lim topology, muaj plaub yam yooj yim RF lim hom, uas yog, high pass lim, low pass lim, band pass lim thiab band nres lim

Low Pass Filter:

Raws li lub npe cuam tshuam, lub lim qis qis yog lub lim dej uas tsuas yog tso cai rau cov zaus tsawg dhau los thiab ua rau lwm cov teeb liab frequencies tib lub sijhawm. Thaum lub teeb liab dhau los ntawm bandpass, nws qhov kev txo qis yog txiav txim siab los ntawm ntau yam, xws li lim topology, layout thiab cov khoom zoo. Tsis tas li ntawd, lub lim topology kuj txiav txim siab qhov kev hloov pauv ceev ntawm lub lim los ntawm lub passband kom ua tiav nws qhov kev tawm tsam kawg.

Cov lim dej qis dhau los hauv ntau hom. Daim ntawv thov tseem ceeb ntawm lub lim yog txhawm rau txhawm rau kev sib haum xeeb ntawm RF amplifier. Cov yam ntxwv no tseem ceeb heev vim tias nws pab tiv thaiv kev cuam tshuam tsis tsim nyog los ntawm cov kab sib kis sib txawv. Feem ntau, cov ntxaij lim dej qis dhau yog siv rau cov ntawv thov suab thiab lim tawm suab nrov ntawm ib qho chaw sab nraud. Tom qab lub high-frequency teeb liab raug lim, qhov tau txais cov teeb liab zaus muaj ib tug meej zoo.

High Pass Filter:

Nyob rau hauv sib piv rau lub low pass lim, lub high pass lim tso cai rau tsuas high zaus signals mus dhau. Qhov tseeb, cov lim dej siab dhau thiab cov lim qis dhau yog qhov sib ntxiv, vim tias ob lub lim dej tuaj yeem siv ua ke los tsim cov lim band-pass. Tus tsim ntawm lub siab pass lim yog ncaj qha thiab attenuates lub zaus hauv qab no qhov chaw pib.

Feem ntau, cov ntxaij lim dej siab dhau yog siv nyob rau hauv lub tshuab suab, los ntawm txhua qhov tsawg zaus raug lim. Tsis tas li ntawd, nws kuj yog siv los tshem tawm cov neeg hais lus me me thiab cov ntses bass thaj tsam ntau zaus; Cov lim dej no tshwj xeeb tsim rau hauv cov neeg hais lus. Txawm li cas los xij, yog tias ib qho DIY project koom nrog, lub siab dhau lim tau yooj yim txuas nrog lub kaw lus.

Band Pass Filters:

Band-pass lim yog ib lub voj voog uas tso cai rau cov teeb liab los ntawm ob qhov sib txawv kom dhau mus thiab ua kom cov teeb liab uas tsis nyob hauv nws qhov kev pom zoo. Feem ntau band-pass lim cia siab rau lwm qhov chaw hluav taws xob sab nraud thiab siv cov khoom siv hluav taws xob, xws li kev sib xyaw ua ke thiab cov transistors. Hom lim no hu ua active band-pass filter. Ntawm qhov tod tes, qee qhov band-pass lim tsis siv cov khoom siv hluav taws xob sab nraud thiab tso siab rau cov khoom siv tsis zoo, xws li inductors thiab capacitors. Cov lim no hu ua passive band-pass filters.

Bandpass lim feem ntau siv hauv wireless receivers thiab transmitters. Nws lub luag haujlwm tseem ceeb hauv lub transmitter yog txhawm rau txwv qhov bandwidth ntawm cov teeb liab tso tawm kom tsawg, kom cov ntaub ntawv xav tau tuaj yeem xa mus rau ntawm qhov xav tau ceev thiab daim ntawv. Thaum lub receiver koom nrog, lub band-pass lim tsuas tso cai rau kev txiav txim siab lossis hnov ​​​​cov naj npawb ntawm cov zaus, thaum txiav tawm lwm cov cim los ntawm qhov tsis xav tau ntau zaus.

Nyob rau hauv ib lo lus, thaum lub band-pass lim tau tsim, nws tuaj yeem yooj yim ua kom lub teeb pom kev zoo thiab txo qis kev sib tw lossis cuam tshuam ntawm cov teeb liab.

Band Reject:

Qee lub sij hawm hu ua band nres lim, band nres lim yog lub lim uas tso cai rau feem ntau zaus hla tsis tau hloov. Txawm li cas los xij, nws attenuates frequencies hauv qab ib qho tshwj xeeb heev. Nws muaj nuj nqi yog kiag li opposite rau ntawm lub band-pass lim. Yeej, nws txoj haujlwm yog kom dhau qhov zaus ntawm xoom mus rau thawj qhov kev txiav tawm ntawm qhov zaus. Nyob rau hauv nruab nrab, nws dhau tag nrho cov frequencies saum toj no qhov thib ob txiav tawm ntawm zaus. Txawm li cas los xij, nws tsis lees paub lossis thaiv tag nrho lwm cov zaus ntawm ob lub ntsiab lus no.

Nyob rau hauv ib lo lus, lub lim yog ib yam dab tsi uas tso cai rau cov teeb liab hla nrog kev pab los ntawm passband. Nyob rau hauv lwm yam lus, lub stopband nyob rau hauv lub lim yog lub ntsiab lus uas ib co frequencies raug tsis lees paub los ntawm tej lim. Seb nws yog high pass, low pass los yog band pass, lub zoo tagnrho lim yog ib tug lim tsis poob nyob rau hauv lub pass band. Txawm li cas los xij, hauv kev muaj tiag, tsis muaj qhov zoo tshaj plaws lim vim tias bandpass yuav ntsib qee zaus poob thiab nws tsis tuaj yeem ua tiav qhov kev txwv tsis kawg thaum lub sijhawm nres.

Vim li cas cov xov tooj cua Frequency Filters tseem ceeb heev?

RF lim siv los faib cov teeb liab zaus, tab sis dab tsi ua rau lawv tseem ceeb heev? Hauv luv luv, RF cov ntxaij lim dej tuaj yeem lim tawm cov suab nrov uas yuav cuam tshuam rau qhov zoo lossis kev ua haujlwm ntawm kev sib txuas lus lossis txo qhov cuam tshuam ntawm cov teeb liab sab nraud. Tsis muaj qhov tsim nyog RF lim tuaj yeem ua rau kev sib kis ntawm cov teeb liab zaus, thiab thaum kawg tuaj yeem ua rau kev sib txuas lus puas.

Yog li, RF cov ntxaij lim dej ua lub luag haujlwm tseem ceeb hauv kev sib txuas lus wireless (xws li satellite, radar, mobile wireless systems, thiab lwm yam). Thaum nws los txog rau kev ua haujlwm ntawm unmanned aerial tsheb (UAS), qhov tseem ceeb ntawm RF lim yog pom tseeb. Tsis muaj kev pom zoo yuav cuam tshuam rau UAS ntau txoj hauv kev, xws li:

Kev sib txuas lus ntau tuaj yeem raug txo kom muaj kev cuam tshuam los ntawm ib puag ncig sab nraud. Tsis tas li ntawd, qhov muaj ntau ntawm RF signals nyob rau hauv cov huab cua yuav ua rau muaj kev puas tsuaj loj rau UAV kev sib txuas lus system. Cov teeb liab tsis zoo los ntawm lwm lub platform suav nrog tab sis tsis txwv rau:; Intensive Wi Fi teeb liab ua haujlwm thiab lwm yam kev sib txuas lus ua haujlwm hauv UAS.

Kev cuam tshuam los ntawm lwm cov kev sib txuas lus yuav cuam tshuam rau UAS kev sib txuas lus, yog li txo lossis txwv kev sib txuas lus ntawm cov kab ke no.

Kev cuam tshuam tseem yuav cuam tshuam rau GPS teeb liab txais ntawm UAS; Qhov no ua rau muaj kev ua yuam kev hauv GPS nrhiav. Hauv qhov phem tshaj plaws, qhov no yuav ua rau poob tag nrho ntawm GPS teeb liab txais tos.

Nrog rau RF lim kom zoo, kev cuam tshuam sab nraud thiab teeb liab cuam tshuam los ntawm cov kab ke sib txuas lus tuaj yeem raug tshem tawm yooj yim. Qhov no tswj qhov zoo ntawm qhov xav tau lub teeb liab zaus thaum yooj yim lim tawm txhua qhov tsis xav tau teeb liab zaus.

Tsis tas li ntawd, cov ntxaij lim dej RF tseem ua lub luag haujlwm tseem ceeb hauv lub xov tooj ntawm tes. Thaum nws los txog rau cov xov tooj ntawm tes, lawv xav tau qee cov xov tooj ntawm cov zaus ua haujlwm kom zoo. Vim tias tsis muaj cov ntxaij lim dej RF uas tsim nyog, ntau zaus bands yuav tsis sib koom ua ke tib lub sijhawm, uas txhais tau hais tias qee qhov zaus bands yuav raug tsis lees paub, uas yog, Ntiaj Teb Kev Tshawb Fawb Satellite System (GNSS), kev nyab xeeb rau pej xeem, Wi-Fi, thiab lwm yam. 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 tib lub sijhawm.

Feem ntau, cov ntxaij lim dej yog lub teeb hauv qhov hnyav thiab pab txhim kho kev ua haujlwm ntawm lub teeb liab zaus. Yog tias RF lim tsis muab qhov kev xav tau, ces koj tuaj yeem tshawb nrhiav ntau yam kev xaiv, ib qho yog ntxiv amplifiers rau koj tus qauv tsim. Los ntawm daim phiaj amplifier mus rau lwm yam RF fais fab amplifier, koj tuaj yeem hloov cov teeb liab qis dua rau cov teeb liab ntau dua; Yog li txhawm rau txhim kho kev ua haujlwm tag nrho ntawm RF tsim.

Si Chuan Keenlion Microwave ib qho kev xaiv loj hauv qhov nqaim thiab kev teeb tsa dav dav, suav nrog zaus ntawm 0.5 txog 50 GHz. Lawv tau tsim los tswj los ntawm 10 mus rau 30 watts input zog hauv 50-ohm kis tau tus mob. Microstrip los yog stripline designs yog siv, thiab optimized rau kev ua tau zoo tshaj plaws.

Peb kuj tuaj yeem kho RF Lim raws li koj xav tau. Koj tuaj yeem nkag mus rau nplooj ntawv customization los muab cov kev qhia tshwj xeeb uas koj xav tau.

https://www.keenlion.com/customization/

Sichuan Keenlion Microwave Technology Co., Ltd.

E-mail:

sales@keenlion.com

tom@keenlion.com