Kuti uenderane nezvinodiwa neantenna angle yechigadzirwa chitsva uye kugovera chizvarwa chekare PCB sheet mold, inotevera antenna dhizaini inogona kushandiswa kuwana antenna kuwana ye14dBi@77GHz uye nemwaranzi kuita kwe3dB_E/H_Beamwithth=40°. Kushandisa Rogers 4830 ndiro, ukobvu 0.127mm, Dk=3.25, Df=0.0033.
Antenna marongerwo
Mumufananidzo uri pamusoro, microstrip grid antenna inoshandiswa. Iyo microstrip grid array antenna imhando yeantenna inoumbwa neinoyerera inopenya zvinhu uye mitsetse yekufambisa inoumbwa neN microstrip mhete. Iyo ine compact chimiro, yakakwira kuwana, nyore kudya uye Kureruka kwekugadzira uye zvimwe zvakanakira. Iyo huru polarization nzira ndeye mutsara polarization, yakafanana neyakajairika microstrip antenna uye inogona kugadziriswa ne etching tekinoroji. Iyo grid's impedance, nzvimbo yekudyisa, uye yekubatanidza chimiro pamwe chete zvinotarisisa kugovera kwazvino kutenderera, uye hunhu hwemwaranzi hunoenderana negeometry yegridi. Saizi yegidhi imwechete inoshandiswa kuona iyo yepakati frequency yeantenna.
RFMISO array antenna akatevedzana zvigadzirwa:
RM-PA7087-43
RM-PA1075145-32
RM-SWA910-22
RM-PA10145-30
Kuongorora nheyo
Iyo yazvino inoyerera yakamira yakatwasuka yeiyo array element ine yakaenzana amplitude uye reverse kutungamira, uye iyo radiation kugona haina simba, iyo ine zvishoma zvinokanganisa kuita kweantenna. Seta hupamhi hwesero l1 kusvika kuhafu yewavelength uye gadzirisa kureba kwesero (h) kuti uwane mutsauko wechikamu che180 ° pakati pea0 neb0. Kune yakafararira radiation, mutsauko wechikamu pakati pemapoinzi a1 neb1 i0 °.
Array element chimiro
Feed structure
Grid-mhando antennas anowanzo shandisa coaxial feed chimiro, uye feeder yakabatana kuseri kwePCB, saka iyo yekudyisa inoda kugadzirwa kuburikidza nematanho. Pakugadziriswa chaiko, pachava nekukanganisa kwechokwadi, izvo zvinokanganisa kuita. Kuti usangane neruzivo rwechikamu chinotsanangurwa mumufananidzo uri pamusoro, chirongwa chakarongwa chakasiyana chekudya chinogona kushandiswa, neakaenzana amplitude excitation pazviteshi zviviri, asi mutsauko we180 °.
Coaxial feed chimiro[1]
Mazhinji microstrip grid array antennas anoshandisa coaxial feeding. Nzvimbo dzekudyisa dzegrid array antenna dzinonyanya kukamurwa kuita mhando mbiri: yepakati yekudyisa (yekudyisa poindi 1) uye kumucheto kudyisa (yekudyisa poindi 2 uye yekudyisa poindi 3).
Yakajairika grid array chimiro
Munguva yekudyisa kumucheto, kune masaisai anofamba anotenderera gidhi rese pane grid array antenna, inova isina resonant imwe-direction end-fire array. Iyo grid array antenna inogona kushandiswa seese ari maviri anofamba wave antenna uye resonant antenna. Kusarudza iyo yakakodzera frequency, feed point, uye saizi yegridi inobvumira iyo grid kuti ishande munzvimbo dzakasiyana: kufamba wave (frequency sweep) uye resonance (kumucheto emission). Senge inofamba wave antenna, iyo grid array antenna inotora kumucheto-yakadyiswa fomu, nerutivi rupfupi rwegridi rwakati kurei kupfuura chikamu chimwe muzvitatu cheiyo yakatungamirwa wavelength uye rutivi rurefu pakati pekaviri nekatatu kureba kwedivi pfupi. . Ikozvino padivi pfupi inopfuudzwa kune rumwe rutivi, uye pane mutsauko wechikamu pakati pemativi mapfupi. Traveling wave (non-resonant) grid antennas anopenya matanda akarereka anotsauka kubva kune yakajairika nzira yegridi ndege. Iyo danda nzira inoshanduka ne frequency uye inogona kushandiswa ku frequency scanning. Kana iyo grid array antenna inoshandiswa seresonant antenna, iyo yakareba uye mapfupi mativi egidhi akagadzirwa kuti ave one conductive wavelength uye hafu ye conductive wavelength yepakati frequency, uye yepakati yekudyisa nzira inogamuchirwa. Ikozvino ikozvino yegridi antenna mune resonant state inopa yakamira wave kugovera. Mwaranzi inogadzirwa zvakanyanya nemativi mapfupi, nemativi marefu achishanda semitsara yekufambisa. Iyo grid antenna inowana iri nani radiation mhedzisiro, iyo yakakwira mwaranzi iri munzvimbo yakafara-padivi reradiation state, uye iyo polarization inofanana nepfupi parutivi rwegridi. Kana iyo frequency inotsauka kubva kune yakagadziridzwa yepakati frequency, iyo ipfupi yedivi regidhi haisisiri hafu yegwara wavelength, uye kupatsanuka kwedanda kunoitika mumwaranzi maitiro. [2]
Array modhi uye yayo 3D pateni
Sezvinoratidzwa mumufananidzo uri pamusoro weiyo antenna chimiro, uko P1 neP2 zviri 180 ° kunze kwechikamu, ADS inogona kushandiswa schematic simulation (isina kuenzanisirwa muchinyorwa chino). Nekusiyanisa kudyisa chiteshi chekudya, kugovera kwazvino pane imwe grid chinhu kunogona kucherechedzwa, sezvakaratidzwa mukuongorora kwemusimboti. Mafungu ari munzvimbo yelongitudinal ari mumativi akasiyana (kukanzura), uye mafungu ari munzvimbo yakachinjika ane amplitude yakaenzana uye muchikamu (superposition).
Kugoverwa kwazvino pamaoko akasiyana1
Kugoverwa kwazvino pamaoko akasiyana 2
Izvo zviri pamusoro zvinopa sumo pfupi kune grid antenna, uye inogadzira array uchishandisa microstrip feed chimiro chinoshanda pa77GHz. Muchokwadi, zvinoenderana nezvinodiwa zvekuonekwa kweradar, iyo yakatwasuka uye yakachinjika nhamba yegridi inogona kudzikiswa kana kuwedzerwa kuti iwane dhizaini yeantenna pane imwe kona. Uye zvakare, kureba kweiyo microstrip yekufambisa mutsara inogona kugadziridzwa mune inosiyanisa feed network kuti iwane inoenderana chikamu mutsauko.
Nguva yekutumira: Jan-24-2024
