Main lobe dav
Rau txhua tus kav hlau txais xov, feem ntau, nws cov qauv kev taw qhia saum npoo yog feem ntau cov duab zoo nkauj, yog li cov qauv kev taw qhia kuj hu ua lobe qauv.Lub lobe nrog lub siab tshaj plaws hluav taws xob kev taw qhia yog hu ua lub ntsiab lobe, thiab tus so yog hu ua sab lobe.
Lub lobe dav ntxiv muab faib ua ib nrab lub zog (los yog 3dB) lobe dav thiab xoom fais fab lobe dav.Raws li pom nyob rau hauv daim duab hauv qab no, ntawm ob sab ntawm tus nqi siab tshaj plaws ntawm lub ntsiab lobe, lub kaum sab xis ntawm ob qho kev qhia uas lub hwj chim poob mus rau ib nrab (0.707 npaug ntawm qhov kev siv lub teb) yog hu ua ib nrab lub zog lobe dav.
Lub kaum sab xis ntawm ob qho kev taw qhia uas lub zog lossis qhov chaw siv zog poob mus rau thawj xoom yog hu ua xoom-lub zog lobe dav
Kav hlau txais xov polarization
Polarization yog ib qho tseem ceeb ntawm cov kav hlau txais xov.Lub transmitting polarization ntawm tus kav hlau txais xov yog lub xeev ntawm lub zog hluav taws xob teb vector endpoint ntawm lub transmitting kav hlau txais xov radiating electromagnetic yoj nyob rau hauv cov kev taw qhia, thiab qhov tau txais polarization yog lub xeev ntawm cov hluav taws xob teb vector endpoint ntawm lub receiver antenna teeb meem dav hlau yoj nyob rau hauv no kev taw qhia.
Lub polarization ntawm tus kav hlau txais xov yog hais txog polarization ntawm qhov tshwj xeeb teb vector ntawm xov tooj cua nthwv dej, thiab lub xeev cov lus tsa suab ntawm qhov kawg taw tes ntawm hluav taws xob teb vector nyob rau lub sijhawm, uas cuam tshuam nrog kev taw qhia ntawm qhov chaw.Cov kav hlau txais xov siv hauv kev xyaum feem ntau xav tau polarization.
Polarization tuaj yeem muab faib ua linear polarization, ncig polarization thiab elliptic polarization.Raws li pom nyob rau hauv daim duab hauv qab no, qhov twg cov trajectory ntawm qhov kawg ntawm qhov hluav taws xob teb vector nyob rau hauv daim duab (a) yog ib txoj kab ncaj nraim, thiab lub kaum sab xis ntawm kab thiab X-axis tsis hloov nrog lub sij hawm, qhov polarized nthwv dej no hu ua linearly polarized yoj.
Thaum pom raws cov kev taw qhia ntawm kev nthuav tawm, kev sib hloov clockwise ntawm cov hluav taws xob teb vector yog hu ua txoj cai-tes ncig polarized nthwv dej, thiab kev sib hloov counterclockwise hu ua sab laug-tes ncig polarized nthwv dej.Thaum pom cov kev taw qhia ntawm kev nthuav tawm, txoj cai-tes tsis tig rov qab clockwise thiab sab laug-tes tsis tig clockwise.
Radar xav tau rau antennas
Raws li lub kav hlau txais xov radar, nws txoj haujlwm yog los hloov cov kev taw qhia yoj teb uas tsim los ntawm lub tshuab xa mus rau hauv qhov chaw hluav taws xob, tau txais cov ncha rov qab los ntawm lub hom phiaj, thiab hloov lub zog ntawm lub ncha mus rau hauv kev taw qhia yoj teb kom xa mus rau lub receiver.Cov kev cai yooj yim ntawm radar rau kav hlau txais xov feem ntau suav nrog:
Muab kev hloov pauv hluav taws xob zoo (tseem ntsuas hauv cov kav hlau txais xov efficiency) ntawm qhov chaw hluav taws xob hluav taws xob thiab cov kab sib kis;Kev ua haujlwm siab kav hlau txais xov qhia tau hais tias RF lub zog tsim los ntawm lub transmitter tuaj yeem siv tau zoo
Muaj peev xwm ua kom pom tseeb lub zog ntau zaus nyob rau hauv kev taw qhia ntawm lub hom phiaj lossis tau txais lub zog ntau zaus los ntawm kev taw qhia ntawm lub hom phiaj ( ntsuas hauv cov kav hlau txais xov nce)
Lub zog faib hluav taws xob ntawm qhov chaw hluav taws xob hauv qhov chaw tuaj yeem paub tau raws li kev ua haujlwm hauv huab cua ntawm radar ( ntsuas los ntawm cov kav hlau txais xov kev taw qhia daim duab).
Kev tswj kom yooj yim polarization phim cov yam ntxwv polarization ntawm lub hom phiaj
Muaj zog mechanical qauv thiab hloov tau yooj yim.Kev txheeb xyuas qhov chaw nyob ib puag ncig tuaj yeem taug qab cov hom phiaj zoo thiab tiv thaiv cov teebmeem cua
Ua tau raws li kev xav tau xws li kev txav mus los, yooj yim ntawm kev zais, tsim nyog rau lub hom phiaj tshwj xeeb, thiab lwm yam.
Post lub sij hawm: Feb-14-2023
