Kev sib hloov polarization ntawm sab xis (RHCP) thiab sab laug (LHCP)piav qhia txog qhov kev taw qhia uas lub vector hluav taws xob tig thaum lub nthwv dej electromagnetic nthuav dav. Kev txheeb xyuas kom raug yog qhov tseem ceeb hauv kev sib txuas satellite, radar, kev ntsuas antenna thiab lwm yam RF systems vim tias cov antennas xa thiab txais yuav tsum siv polarization sib xws kom ua tiav kev hloov pauv hluav taws xob zoo.
Phau ntawv qhia no piav qhia txog kev saib xyuas, txoj cai siv tes ua, kev sib raug zoo ntawm thaj chaw thiab cov khoom, qhov sib piv ntawm axial thiab cov lus qhia tseem ceeb uas yuav tsum xyuas thaum xaiv lub kav hlau txais xov uas muaj polarized ncig.
Piv txwv ntawm RF MISO Circularly Polarized Horn Antenna
RF MISO muab cov qauv kav hlau txais xov uas muaj polarized circular rau cov kab ua haujlwm xaiv. Cov piv txwv hauv qab no qhia txog ntau hom zaus xaiv; ib txwm paub meej tias tes, axial ratio, gain, interface thiab mechanical cov ntaub ntawv hauv daim ntawv qhia qauv tam sim no ua ntej xaiv.
RM-CPHA82124-20| 8.2–12.4 GHz lub kav hlau txais xov tooj cua uas muaj polarized ncig
RM-CPHA1840-12| 18–40 GHz lub kav hlau txais xov tooj cua uas muaj polarized ncig
RM-CPHA218-16| 2–18 GHz lub kav hlau txais xov tooj cua uas muaj polarized ncig
Tshawb nrhiav tag nrho pawg: RF MISO lub voj voog polarization horn antennas, suav nrog RHCP, LHCP thiab dual-circular-polarization kev xaiv los ntawm tus qauv.
Polarization voj voog yog dab tsi?
Polarization piav qhia txog txoj kev uas tau taug qab los ntawm lub vector hluav taws xob ntawm qhov chaw ruaj khov hauv qhov chaw. Hauv linear polarization, lub vector tseem nyob ntawm txoj kab ncaj. Hauv qhov kev sib hloov zoo tagnrho, nws qhov loj yog qhov ruaj khov thaum lub vector tig los ntawm 360 degrees thaum lub sijhawm txhua lub voj voog RF. Cov kav hlau txais xov feem ntau tsim cov txoj kev me ntsis elliptical, yog li kev sib hloov yog ntsuas los ntawmqhov sib piv ntawm axialIb nthwv dej zoo tagnrho uas muaj polarized ncig muaj 0 dB axial ratio; qhov ntsuas qis dua axial ratio qhia txog polarization ze rau lub voj voog.
Kev sib hloov polarization tuaj yeem tsim los ntawm ob lub orthogonal linear teb Cheebtsam nrog sib npaug amplitude thiab qhov sib txawv theem ntawm ntxiv lossis rho tawm 90 degrees. Lub cim ntawm qhov kev sib raug zoo ntawm quadrature theem txiav txim siab seb lub nthwv dej yog RHCP lossis LHCP raws li cov lus cog tseg tau hais.
RHCP vs LHCP: Hais txog Daim Ntawv Cog Lus Saib
Kev siv tes yuav zoo li tig rov qab thaum saib tib lub teb tig los ntawm kev taw qhia sib txawv. Yuav kom tsis txhob muaj kev tsis meej, ib txwm hais qhov kev taw qhia ntawm kev soj ntsuam. Raws li IEEE cov lus cog tseg feem ntau siv, kev siv tes yog txhais thaum saibnyob rau hauv cov kev taw qhia ntawm nthwv dej kis mus, los ntawm qhov chaw mus rau qhov kev taw qhia ntawm kev mus ncig.
Ib txoj kev siv tau zoo yog taw koj tus ntiv tes xoo rau hauv qhov kev taw qhia kis. Yog tias qhov kev sib hloov ntawm lub zog hluav taws xob ua raws li qhov nkhaus ntawm cov ntiv tes ntawm koj sab tes xis, lub nthwv dej yog RHCP raws li cov lus cog tseg no; yog tias nws ua raws li qhov nkhaus sab laug, nws yog LHCP. Vim tias qee cov ntaub ntawv thiab kev qhuab qhia siv qhov kev pom sib txawv, lees paub cov lus cog tseg hauv daim ntawv qhia txog lub kav hlau txais xov thiab cov txheej txheem sim ua ntej piv cov txiaj ntsig.
Cov Cheebtsam Hauv Tebchaws thiab Kev Sib Raug Zoo ntawm Theem
Xav txog ob lub dav hlau-nthwv dej uas taug kev raws z-axis. Ib lub zog hluav taws xob raug taw qhia raws x nrog qhov amplitude Ex; qhov thib ob yog taw qhia raws y nrog amplitude EyLawv cov vector sum txiav txim siab qhov tshwm sim ntawm lub xeev polarization.
Thaum tsuas muaj ib qho khoom xwb, lub nthwv dej yuav raug polarized raws txoj kab ntawd. Thaum ob qho khoom muaj nyob, lawv qhov amplitude thiab theem txiav txim siab seb qhov tshwm sim yog linear, circular lossis elliptical polarization.
Kev sib raug zoo ntawm thaj chaw tuaj yeem sau ua ke raws li hauv qab no:
- Yog tias Extsis yog xoom thiab Eyyog xoom, polarization yog linear raws x.
- Yog tias Eytsis yog xoom thiab Exyog xoom, polarization yog linear raws y.
- Yog tias ob qho khoom sib xyaw ua ke nyob rau hauv theem, lawv cov vector sum tseem yog linear ntawm lub kaum sab xis ruaj khov.
- Yog tias cov khoom muaj qhov sib npaug zos thiab qhov sib txawv ntawm theem ntxiv lossis rho tawm 90 degrees, qhov tshwm sim yog qhov zoo tagnrho polarization voj voog.
Yog tias cov khoom sib npaug tsis sib npaug, lossis qhov sib txawv ntawm theem tsis yog 90 degrees, daim teb yuav kos ib lub ellipse es tsis yog lub voj voog. Qhov no yog vim li cas daim ntawv qhia txog antenna yuav tsum qhia meej txog qhov sib piv axial hla zaus thiab, qhov twg tsim nyog, hla qhov kev pab them nqi angular. Kev siv tes ib leeg tsis piav qhia txog qhov zoo ntawm polarization.
Vim li cas Polarization Matching thiaj tseem ceeb
Lub kav hlau txais xov tooj cua txais tau lub zog loj tshaj plaws thaum nws qhov polarization raug phim rau nthwv dej tuaj. Qhov sib txawv ntawm cov xeev polarization zoo tagnrho yog orthogonal, yog li RHCP / LHCP mismatch tuaj yeem ua rau muaj kev poob polarization loj heev. Cov kav hlau txais xov tooj cua tiag tiag muab kev tsis lees paub hla-polarization finite, thiab kev ua tau zoo ntsuas kuj nyob ntawm qhov sib piv axial, kev sib phim, kev cuam tshuam thiab qhov chaw sim ib puag ncig.
Cov kev cuam tshuam los ntawm cov nplaim hluav taws xob tuaj yeem hloov pauv lub xeev polarization pom tseeb, thiab radomes, fixtures lossis cov qauv ze ze yuav ua rau lub teb tsis zoo. Rau kev txheeb xyuas qhov tseeb, teeb tsa ob lub antennas ntawm boresight, siv qhov kev siv polarization paub, piv rau lub zog tau txais rau RHCP thiab LHCP configurations, thiab ntsuas qhov piv axial thiab kev ua haujlwm hla-polarization thoob plaws qhov band xav tau.
Yuav Xaiv Lub Antenna RHCP lossis LHCP Li Cas
Ua ntej xaiv lub kav hlau txais xov tooj cua uas muaj polarized circularly, txhais qhov yuav tsum tau ua haujlwm tiav es tsis txhob xaiv los ntawm zaus ib leeg xwb:
- Zaus ntau yam:paub meej tias muaj kev pab them tag nrho, tsis yog tsuas yog qhov zaus nruab nrab xwb.
- Kev sib hloov pauv:qhia meej RHCP, LHCP lossis dual circular polarization thiab cov lus cog tseg ntawm tes.
- Axial piv:xyuas qhov txwv uas xav tau hla zaus thiab lub kaum sab xis.
- Qhov nce thiab beamwidth:phim cov peev nyiaj txuas, kev pab them nqi thiab kev ntsuas-qhov deb.
- Kev sib piv ntawm impedance:tshuaj xyuas VSWR lossis rov qab poob dua tag nrho cov band.
- RF interface thiab lub zog:xyuas seb lub connector lossis waveguide interface thiab cov kev xav tau ntawm kev tswj fais fab.
- Kev sib koom ua ke ntawm tshuab:paub meej tias lub hnab ntawv, qhov sib txuas ntawm qhov chaw, kev taw qhia thiab cov kev cai ib puag ncig.
Tham nrog tus kws tshwj xeeb RF MISO Antenna
RF MISO yog lub chaw tsim khoom thiab tus muag khoom ntawm RF thiab microwave antenna. Qhia koj qhov ntau zaus, qhov yuav tsum tau siv tes, qhov nce, axial ratio, interface thiab kev teeb tsa kom peb pab neeg tuaj yeem pab txheeb xyuas tus qauv txheem lossis tham txog cov kev cai ntawm daim ntawv thov.
Saib cov kav hlau txais xov polarization puag ncig|Tiv tauj RF MISO
Lub sijhawm tshaj tawm: Tsib Hlis-21-2024
