Ukuze uzivumelanise nezidingo ze-engeli ye-antenna yomkhiqizo omusha futhi wabelane ngesikhunta seshidi le-PCB lesizukulwane esidlule, ukwakheka kwe-antenna okulandelayo kungasetshenziswa ukufeza inzuzo ye-antenna engu-14dBi@77GHz kanye nokusebenza kwemisebe engu-3dB_E/H_Beamwidth=40°. Kusetshenziswa ipuleti likaRogers 4830, ukujiya okungu-0.127mm, uDk=3.25, uDf=0.0033.
Ukuhlelwa kwe-antenna
Kulesi sithombe esingenhla, kusetshenziswa i-antenna yegridi ye-microstrip. I-antenna yegridi ye-microstrip iyifomu ye-antenna eyakhiwe yizinto ezikhipha imisebe kanye nemigqa yokudlulisela eyakhiwe yizindandatho ze-N microstrip. Inesakhiwo esiqinile, inzuzo ephezulu, ukudla okulula kanye nokulula kokukhiqiza nezinye izinzuzo. Indlela eyinhloko ye-polarization i-linear polarization, efana ne-antenna ye-microstrip evamile futhi ingacutshungulwa ngobuchwepheshe bokuqopha. I-impedance yegridi, indawo yokondla, kanye nesakhiwo sokuxhumana ndawonye kunquma ukusatshalaliswa kwamanje kulo lonke i-array, futhi izici zomsebe zincike ku-geometry yegridi. Usayizi wegridi eyodwa usetshenziswa ukunquma imvamisa ephakathi ye-antenna.
Imikhiqizo yochungechunge lwe-antenna ye-RFMISO array:
RM-PA7087-43
RM-I-PA1075145-32
RM-SWA910-22
RM-I-PA10145-30
Ukuhlaziywa kwezimiso
Ugesi ogeleza ohlangothini oluqondile lwe-array element unobukhulu obulinganayo kanye nohlangothi olubuyela emuva, futhi ikhono lokukhanya libuthakathaka, okunomthelela omncane ekusebenzeni kwe-antenna. Setha ububanzi beseli l1 bube yi-half wavelength bese ulungisa ukuphakama kweseli (h) ukuze ufinyelele umehluko wesigaba ongu-180° phakathi kuka-a0 no-b0. Ku-broadside radiation, umehluko wesigaba phakathi kwamaphuzu a1 no-b1 ungu-0°.
Isakhiwo sezinto ze-array
Isakhiwo sokuphakelayo
Ama-antenna ohlobo lwegridi avame ukusebenzisa isakhiwo sokuphakelayo se-coaxial, futhi i-feeder ixhunywe ngemuva kwe-PCB, ngakho-ke i-feeder idinga ukwakhiwa ngezendlalelo. Ukuze kucutshungulwe ngempela, kuzoba nephutha elithile lokunemba, elizothinta ukusebenza. Ukuze kuhlangatshezwane nolwazi lwesigaba oluchazwe esithombeni esingenhla, isakhiwo sokuphakelayo esihlukile esihleliwe singasetshenziswa, ngomsindo olinganayo we-amplitude kumachweba amabili, kodwa umehluko wesigaba ongu-180°.
Isakhiwo sokudla kwe-coaxial[1]
Ama-antenna amaningi e-grid array e-microstrip asebenzisa ukondla kwe-coaxial. Izikhundla zokudla ze-antenna ye-grid array zihlukaniswe kakhulu ngezinhlobo ezimbili: ukondla okuphakathi (iphuzu lokuphakela 1) kanye nokondla okusemaphethelweni (iphuzu lokuphakela 2 kanye nephuzu lokuphakela 3).
Isakhiwo segridi esijwayelekile
Ngesikhathi sokudla komphetho, kuba namagagasi ahambayo azungeze lonke igridi ku-antenna ye-grid array, okuyi-array eyodwa-direction end-fire array engaphenduli. I-antenna ye-grid array ingasetshenziswa njenge-antenna ye-traveling wave kanye ne-antenna ephendulayo. Ukukhetha imvamisa efanele, indawo yokuphakelayo, kanye nosayizi wegridi kuvumela igridi ukuthi isebenze ezimweni ezahlukene: igagasi elihambayo (i-frequency sweep) kanye ne-resonance (edge emission). Njenge-antenna ye-traveling wave, i-antenna ye-grid array isebenzisa ifomu lokuphakelayo elidluliselayo umphetho, kanti uhlangothi olufushane lwegridi lukhulu kancane kunengxenye eyodwa kwezintathu zobude obuqondisiwe kanye nohlangothi olude phakathi kobude obuphindwe kabili noma kathathu bohlangothi olufushane. Ugesi ohlangothini olufushane udluliselwa kolunye uhlangothi, futhi kukhona umehluko wesigaba phakathi kwezinhlangothi ezimfushane. Ama-antenna e-grid wave (angenawo umphetho) akhipha imishayo ethambekile ephambuka esiqondisweni esijwayelekile sendiza yegridi. Isiqondiso se-beam siyashintsha ngemvamisa futhi singasetshenziswa ekuskeni imvamisa. Uma i-antenna yegridi isetshenziswa njenge-antenna ephendulayo, izinhlangothi ezinde nezimfushane zegridi zenzelwe ukuba zibe yi-wavelength eyodwa eqhubayo kanye nengxenye ye-wavelength eqhubayo yemvamisa ephakathi, bese kusetshenziswa indlela yokudla ephakathi. Ugesi osheshayo we-antenna yegridi esimweni se-resonant uveza ukusatshalaliswa kwamagagasi okuma. Imisebe ikhiqizwa kakhulu yizinhlangothi ezimfushane, lapho izinhlangothi ezinde zisebenza njengemigqa yokudlulisa. I-antenna yegridi ithola umphumela ongcono wemisebe, imisebe ephezulu isesimweni semisebe eseceleni elibanzi, futhi i-polarization ihambisana nohlangothi olufushane lwegridi. Lapho imvamisa iphambuka ku-frequency ephakathi eklanyelwe, uhlangothi olufushane lwegridi alusekho ingxenye ye-wavelength yomhlahlandlela, futhi ukuhlukana kwemisebe kwenzeka kuphethini yemisebe. [2]
Imodeli ye-Array kanye nephethini yayo ye-3D
Njengoba kuboniswe esithombeni esingenhla sesakhiwo se-antenna, lapho i-P1 ne-P2 zingaphandle kwesigaba esingu-180°, i-ADS ingasetshenziswa ekulingiseni kwe-schematic (akufakiwe kulesi sihloko). Ngokuphakela i-feed port ngendlela ehlukile, ukusatshalaliswa kwamanje ku-grid element eyodwa kungabonakala, njengoba kuboniswe ekuhlaziyweni kwesimiso. Ama-current endaweni ye-longitudinal akwezinye izindlela eziphambene (ukukhansela), kanti ama-current endaweni ephambeneyo anobukhulu obulinganayo futhi esigabeni (ukubeka phezulu).
Ukusatshalaliswa kwamanje ezingalweni ezahlukene1
Ukusatshalaliswa kwamanje ezingalweni ezahlukene 2
Lokhu okungenhla kunikeza isingeniso esifushane ku-antenna yegridi, futhi kuklama i-array kusetshenziswa isakhiwo sokuphakelayo se-microstrip esisebenza ku-77GHz. Eqinisweni, ngokwezidingo zokutholwa kwe-radar, izinombolo eziqondile nezivundlile zegridi zingancishiswa noma zandiswe ukuze kufezwe umklamo we-antenna nge-engeli ethile. Ngaphezu kwalokho, ubude bomugqa wokudlulisa we-microstrip bungashintshwa kunethiwekhi yokuphakelayo ehlukile ukuze kufezwe umehluko wesigaba ohambisanayo.
Isikhathi sokuthunyelwe: Jan-24-2024
