Ukuze kuhlengahlengiswe iimfuno ze-engile ye-antenna yemveliso entsha kwaye kwabelwane nge-mold yephepha le-PCB yesizukulwana esidlulileyo, olu lwakhiwo lwe-antenna lulandelayo lungasetyenziselwa ukufikelela kwi-antenna gain ye-14dBi@77GHz kunye nokusebenza kwemitha ye-3dB_E/H_Beamwidth=40°. Ukusebenzisa ipleyiti yeRogers 4830, ubukhulu yi-0.127mm, iDk=3.25, iDf=0.0033.
Uyilo lwe-antenna
Kulo mfanekiso ungentla, kusetyenziswa i-antenna yegridi ye-microstrip. I-antenna yegridi ye-microstrip luhlobo lwe-antenna olwenziwe zizinto ezikhupha imitha kunye nemigca yokudlulisela eyenziwe yi-N microstrip rings. Inesakhiwo esincinci, i-gain ephezulu, i-feed elula kunye nokulula kokwenziwa kunye nezinye iingenelo. Indlela ephambili ye-polarization yi-linear polarization, efana ne-antenna ze-microstrip eziqhelekileyo kwaye inokucutshungulwa ngetekhnoloji yokukrola. I-impedance yegridi, indawo yokutya, kunye nesakhiwo sokudibanisa kunye zimisela usasazo lwangoku kulo lonke uluhlu, kwaye iimpawu zemitha zixhomekeke kwi-geometry yegridi. Ubungakanani begridi enye busetyenziswa ukumisela i-frequency esembindini ye-antenna.
Iimveliso zochungechunge lwee-antenna ze-RFMISO:
RM-PA7087-43
RM-PA1075145-32
RM-SWA910-22
RM-PA10145-30
Uhlalutyo lwemigaqo
Umsinga ohamba kwicala elithe nkqo le-array element unomlinganiselo olinganayo kunye nomgca obuyela umva, kwaye amandla ombane abuthathaka, nto leyo echaphazela kancinci ukusebenza kwe-antenna. Misela ububanzi beseli l1 kwisiqingatha sobude bexesha kwaye ulungise ukuphakama kweseli (h) ukuze ufezekise umahluko wesigaba se-180° phakathi kwe-a0 kunye ne-b0. Kwimitha ye-broadside, umahluko wesigaba phakathi kwamanqaku a1 kunye ne-b1 yi-0°.
Ulwakhiwo lwento ye-array
Isakhiwo sesondlo
Ii-antenna zohlobo lwegridi zihlala zisebenzisa isakhiwo se-coaxial feed, kwaye i-feeder iqhagamshelwe ngasemva kwe-PCB, ngoko ke i-feeder kufuneka iyilwe ngee-layers. Kwinkqubo yokwenyani, kuya kubakho impazamo ethile yokuchaneka, eya kuchaphazela ukusebenza. Ukuze kuhlangatyezwane nolwazi lwesigaba oluchazwe kumfanekiso ongentla, isakhiwo se-planar differential feed singasetyenziswa, kunye ne-amplitude excitation efanayo kwii-ports ezimbini, kodwa umahluko wesigaba we-180°.
Ulwakhiwo lwesondlo se-coaxial [1]
Uninzi lwee-antenna ze-microstrip grid array zisebenzisa i-coaxial feeding. Iindawo zokutya ze-antenna ze-grid array zahlulwe kakhulu zibe ziintlobo ezimbini: ukutya okusembindini (indawo yokutya 1) kunye nokutya okusemdeni (indawo yokutya 2 kunye nendawo yokutya 3).
Ulwakhiwo oluqhelekileyo lwegridi yoluhlu
Ngexesha lokutyisa ngomphetho, kukho amaza okuhamba ajikeleze igridi yonke kwi-antenna ye-grid array, eyi-array yokuphela komlilo engaguqukiyo kwicala elinye. I-antenna ye-grid array ingasetyenziswa njenge-antenna ye-wave yokuhamba kunye ne-antenna ye-resonant. Ukukhetha i-frequency efanelekileyo, indawo yokuphakelwa, kunye nobukhulu begridi kuvumela igridi ukuba isebenze kwiimeko ezahlukeneyo: i-wave yokuhamba (i-frequency sweep) kunye ne-resonance (i-edge emission). Njenge-antenna ye-wave yokuhamba, i-antenna ye-grid array isebenzisa uhlobo lokuphakelwa ngomphetho, icala elifutshane legridi likhulu kancinci kunesinye kwisithathu sobude obuqondisiweyo kunye necala elide phakathi kobude obuphindwe kabini ukuya kathathu becala elifutshane. Umbane kwicala elifutshane udluliselwa kwelinye icala, kwaye kukho umahluko wesigaba phakathi kwamacala amafutshane. Ii-antenna ze-grid ze-wave yokuhamba (ezingena-resonant) zikhupha imisebe ethambekileyo ephambuka kwicala eliqhelekileyo le-grid plane. Icala le-beam liyatshintsha ngokuphindaphindiweyo kwaye lingasetyenziselwa ukuskena rhoqo. Xa i-antenna yegridi isetyenziswa njenge-antenna ephendulayo, amacala amade namafutshane egridi ayilwe ukuba abe yi-wavelength enye eqhubayo kunye nesiqingatha se-wavelength eqhubayo ye-frequency ephakathi, kwaye indlela yokutya ephakathi iyasetyenziswa. Umbane okhawulezileyo we-antenna yegridi kwimeko ye-resonant ubonisa ukusasazwa kwamaza okuma. Imitha iveliswa kakhulu ngamacala amafutshane, kunye namacala amade asebenza njengemigca yokudlulisela. I-antenna yegridi ifumana isiphumo esingcono semitha, imitha ephezulu ikwimeko yemitha yecala elibanzi, kwaye i-polarization ihambelana necala elifutshane legridi. Xa imitha iphambuka kwi-frequency esembindini eyilwe, icala elifutshane legridi alisekho isiqingatha se-wavelength yesikhokelo, kwaye ukuqhekeka kwemitha kwenzeka kwipateni yemitha. [2]
Imodeli ye-Array kunye nephethini yayo ye-3D
Njengoko kubonisiwe kumfanekiso ongentla wesakhiwo se-antenna, apho i-P1 kunye ne-P2 zingaphandle kwesigaba se-180°, i-ADS ingasetyenziselwa ukulinganisa i-schematic (ayilinganiswanga kweli nqaku). Ngokunika i-feed port ngokwahlukileyo, ukusasazwa kwangoku kwi-grid element enye kunokubonwa, njengoko kubonisiwe kuhlalutyo olusisiseko. Imisinga kwindawo ende ikwicala elichaseneyo (ukurhoxiswa), kwaye imisinga kwindawo enqamlezileyo inomlinganiselo ofanayo kwaye ikwisigaba (ukubekwa phezulu).
Ukusasazwa kwangoku kwiingalo ezahlukeneyo1
Ukusasazwa kwangoku kwiingalo ezahlukeneyo 2
Oku kungasentla kunika intshayelelo emfutshane kwi-antenna yegridi, kwaye iyila uluhlu olusebenzisa isakhiwo se-microstrip feed esisebenza kwi-77GHz. Enyanisweni, ngokweemfuno zokufumanisa i-radar, amanani athe nkqo nathe tye egridi anokuncitshiswa okanye anyuswe ukuze kufezekiswe uyilo lwe-antenna kwi-engile ethile. Ukongeza, ubude bomgca wokudlulisela we-microstrip bunokutshintshwa kwinethiwekhi ye-differential feed ukuze kufezekiswe umahluko wesigaba ohambelanayo.
Ixesha leposi: Jan-24-2024
