I-polarization yesangqa sasekunene (RHCP) kunye ne-polarization yesangqa sasekhohlo (LHCP)Chaza icala apho i-electric-field vector ijikeleza khona njengoko amaza e-electromagnetic esasazeka. Ukuchongwa ngokuchanekileyo kubalulekile kwiikhonkco zesathelayithi, i-radar, ukulinganiswa kwe-antenna kunye nezinye iinkqubo ze-RF kuba ii-antenna ezithumelayo nezamkelayo kufuneka zisebenzise i-polarization ehambelanayo ukuze kufezekiswe ukudluliselwa kwamandla okusebenzayo.
Esi sikhokelo sichaza indlela yokujonga, umthetho wesandla osebenzayo, ubudlelwane phakathi kwentsimi kunye necandelo, umlinganiselo we-axial kunye neenkcukacha eziphambili ekufuneka zijongwe xa ukhetha i-antenna ejikelezileyo ejikelezayo.
Imizekelo ye-RF MISO Circularly Polarized Horn Antenna
I-RF MISO ibonelela ngeemodeli ze-antenna ze-horn ezijikelezileyo ezi-polarized kwiibhendi zokusebenza ezikhethiweyo. Imizekelo engezantsi ibonisa iindlela ezahlukeneyo zokukhetha i-frequency-range; soloko uqinisekisa ukuba i-handedness, i-axial ratio, i-gain, i-interface kunye nedatha ye-mechanical iyasebenza njani kwiphepha ledatha langoku lemodeli ngaphambi kokukhetha.
RM-CPHA82124-20| I-antenna ye-8.2–12.4 GHz ejikelezileyo epholanayo
RM-CPHA1840-12I-antenna ye-18–40 GHz ejikelezileyo epholanayo
RM-CPHA218-16| I-antenna ye-horn ejikelezileyo eyi-2–18 GHz
Hlola udidi olupheleleyo: Ii-antenna ze-RF MISO ezijikelezayo ze-polarization horn, kuquka i-RHCP, i-LHCP kunye neendlela zokupolarization ezijikelezileyo ezimbini ngokwemodeli.
Yintoni i-Circular Polarization?
I-Polarization ichaza indlela elandelwa yi-electric-field vector kwindawo emiselweyo kwindawo ethile. Kwi-linear polarization, i-vector ihlala kumgca othe tye. Kwi-circular polarization efanelekileyo, ubukhulu bayo abuguquguquki ngelixa i-vector ijikeleza kwiidigri ezingama-360 ngexesha lomjikelo ngamnye we-RF. Ii-antenna ezisebenzayo zihlala zivelisa indlela e-elliptical kancinci, ngoko ke i-circularity ivavanywa yiumlinganiselo we-axialIwave ejikelezileyo ephola kakuhle ine-axial ratio ye-0 dB; i-axial ratio esezantsi elinganisiweyo ibonisa i-polarization ekufutshane nesangqa.
I-circular polarization inokwenziwa ziinxalenye ezimbini ze-orthogonal linear field ezine-amplitude elinganayo kunye nomahluko wesigaba se-plus okanye minus degrees ezingama-90. Uphawu lwaloo budlelwane besigaba se-quadrature lumisela ukuba i-wave yi-RHCP okanye i-LHCP phantsi kwesivumelwano esichaziweyo.
I-RHCP vs LHCP: Xela iSivumelwano sokuBukela
Isandla sinokubonakala sijikile xa intsimi efanayo ejikelezayo ijongwa kwicala elahlukileyo. Ukuze uphephe ukungaqondakali, soloko uchaza icala lokujonga. Phantsi kwesivumelwano se-IEEE esisetyenziswa rhoqo, isandla sichazwa xa ujongekwicala lokusasazeka kwamaza, ukusuka kumthombo ukuya kwicala lohambo.
Indlela esebenzayo kukukhomba ubhontsi wakho kwicala lokusasazeka. Ukuba ukujikeleza kwentsimi yombane kulandela ukugoba kweminwe esandleni sakho sasekunene, igagasi yi-RHCP phantsi kwale ndlela; ukuba lilandela ukugoba kwesandla sasekhohlo, yi-LHCP. Ngenxa yokuba amanye amaxwebhu kunye nezifundo zisebenzisa umbono owahlukileyo wokujonga, qinisekisa le ndlela kwi-datasheet ye-antenna kunye nenkqubo yovavanyo ngaphambi kokuba uthelekise iziphumo.
Izinto Eziyinxalenye Yentsimi Nolwalamano Lwesigaba
Cinga ngezinto ezimbini ze-plane-wave ezihamba kwi-z-axis. Enye into ye-electric-field ijongiswe ku-x kunye ne-amplitude Exeyesibini ijoliswe ku-y kunye ne-amplitude EyI-vector sum yabo imisela imeko ye-polarization ephumayo.
Xa kukho icandelo elinye kuphela, i-wave i-polarized linearly ecaleni kwe-axis. Xa zombini ezi candelo zikhona, i-amplitude yazo kunye ne-phase zimisela ukuba isiphumo si-linear, circular okanye elliptical polarization.
Ubudlelwane basentsimini bungashwankathelwa ngolu hlobo lulandelayo:
- Ukuba u-Exayingo-zero kwaye u-Eyngu-zero, i-polarization ihambelana no-x.
- Ukuba u-Eyayingo-zero kwaye u-Exngu-zero, i-polarization ihambelana no-y.
- Ukuba zombini ezi zinto zikwisigaba, i-vector sum yazo ihlala i-linear kwi-engile esisigxina.
- Ukuba izinto zinobukhulu obulinganayo kunye nomahluko wesigaba se-plus okanye minus degrees ezingama-90, isiphumo si-circular polarization efanelekileyo.
Ukuba izinto ezi-orthogonal azilingani, okanye umahluko wesigaba awukho ngqo kwiidigri ezingama-90, intsimi ilandela i-ellipse endaweni yesangqa. Yingakho i-datasheet ye-antenna kufuneka ichaze umlinganiselo we-axial phezu kwe-frequency kwaye, apho kufanelekileyo, phezu kwe-angular coverage ecetywayo. I-handedness yodwa ayichazi umgangatho we-polarisation.
Kutheni iPolarization Matching ibalulekile
I-antenna efumanayo ikhupha amandla afumanekayo aphezulu xa i-polarization yayo ifaniswe ne-wave engenayo. Iimeko ze-polarization ezijikelezileyo ezichaseneyo zi-orthogonal, ngoko ke ukungafani kwe-RHCP/LHCP kunokuvelisa ilahleko enkulu ye-polarization. Ii-antenna zokwenyani zibonelela ngokulahlwa kwe-cross-polarization elinganiselweyo, kwaye ukusebenza okulinganisiweyo kuxhomekeke kwi-axial ratio, ukulungelelaniswa, ukubonakaliswa kunye nendawo yovavanyo ejikelezileyo.
Ukukhanya okuvela kumphezulu oqhubayo kunokutshintsha imeko ebonakalayo ye-polarization, kwaye ii-radomes, izixhobo okanye izakhiwo ezikufutshane zinokuphazamisa intsimi. Ukuqinisekisa okuthembekileyo, lungelelanisa zombini ii-antenna kwi-boresight, sebenzisa isalathiso se-polarization esaziwayo, thelekisa amandla afunyenweyo kwi-RHCP kunye ne-LHCP configurations, kwaye ulinganise i-axial ratio kunye nokusebenza kwe-cross-polarization kuyo yonke ibhendi efunekayo.
Indlela yokukhetha i-RHCP okanye i-LHCP Antenna
Ngaphambi kokuba ukhethe i-antenna ye-polarized horn ejikelezayo, chaza imfuneko yokusebenza epheleleyo endaweni yokukhetha ngokuphindaphindiweyo kuphela:
- Uluhlu lwefrikhwensi:qinisekisa ukugubungela ibhendi epheleleyo, kungekuphela nje i-frequency ephakathi.
- Ukwahlulwahlulwa:chaza i-RHCP, i-LHCP okanye i-dual circular polarization kunye ne-handedness convention.
- Umlinganiselo we-Axial:jonga umda ofunekayo kuzo zonke iifrikhwensi kunye ne-angular coverage.
- Ukwanda kunye nobubanzi be-beamwidth:uhlahlo-lwabiwo mali lwekhonkco lokudibanisa, ukugubungela kunye neemfuno zomlinganiselo womgama.
- Umdlalo wokunganyamezelani:uphononongo lwe-VSWR okanye ilahleko yokubuyisela ngaphezulu kwebhendi epheleleyo.
- Ujongano lweRF kunye namandla:qinisekisa isixhumi okanye ujongano lwe-waveguide kunye neemfuno zokuphatha amandla.
- Ukuhlanganiswa koomatshini:qinisekisa i-envelope, i-interface yokuxhoma, ulwalathiso kunye neemfuno zokusingqongileyo.
Thetha neNgcali ye-RF MISO Antenna
I-RF MISO ngumvelisi kunye nomthengisi we-antenna ye-RF kunye ne-microwave. Yabelana ngoluhlu lwakho lweefrikhwensi, ukuhanjiswa okufunekayo, inzuzo, umlinganiselo we-axial, ujongano kunye nemida yokufakela ukuze iqela lethu likwazi ukunceda ekuchongeni imodeli efanelekileyo okanye lixoxe ngeemfuno zesicelo.
Jonga ii-antenna ze-polarization horn ezijikelezayo|Nxibelelana ne-RF MISO
Ixesha leposi: Meyi-21-2024
