Amakuru - Guhindura ingufu muri antene za radar

Mu miyoboro cyangwa sisitemu za mikoroonde, imiyoboro cyangwa sisitemu yose ikunze kuba igizwe n'ibikoresho byinshi by'ibanze bya mikoroonde nka filters, couplers, power dividers, nibindi. Hifujwe ko binyuze muri ibi bikoresho, bishoboka kohereza neza ingufu z'amajwi kuva ahantu hamwe ujya ahandi nta gihombo kinini;

Muri sisitemu yose ya radar y'imodoka, guhindura ingufu ahanini bikubiyemo kohereza ingufu ziva kuri chip zijya kuri feeder iri kuri PCB board, kohereza feeder ku mubiri wa antene, no gukoresha neza imirasire y'ingufu by'antene. Mu gikorwa cyose cyo kohereza ingufu, igice cy'ingenzi ni igishushanyo cya converter. Converter muri sisitemu ya millimeter wave ahanini zirimo guhindura microstrip kuri substrate integrated waveguide (SIW), guhindura microstrip kuri waveguide, guhindura SIW kuri waveguide, guhindura coaxial kuri waveguide, guhindura waveguide kuri waveguide n'ubwoko butandukanye bwo guhindura waveguide. Iki kibazo kizibanda ku gishushanyo mbonera cya microband SIW.

Ubwoko butandukanye bw'imiterere y'ubwikorezi

Microstripni imwe mu nyubako zikoreshwa cyane mu kuyobora ku murongo wa mikoroonde uri hasi. Ibyiza byayo by'ingenzi ni imiterere yoroshye, ihendutse kandi ihuzwa cyane n'ibice byo gushyiramo hejuru. Umurongo usanzwe wa mikoroonde ukorwa hakoreshejwe ibyuma biyobora uruhande rumwe rw'ubutaka bwa dielectric, bigakora urwego rumwe rw'ubutaka ku rundi ruhande, hamwe n'umwuka uri hejuru yarwo. Igikoresho cyo hejuru muri rusange ni ibikoresho biyobora (ubusanzwe umuringa) bikoze mu nsinga nto. Ubugari bw'umurongo, ubunini, uburenganzira bwo kwemererwa, no gutakaza amashanyarazi kuri substrate ni ibipimo by'ingenzi. Byongeye kandi, ubunini bwa gikoresho (ni ukuvuga ubunini bwa metallization) n'ubushobozi bwa gikoresho nabyo ni ingenzi ku murongo wo hejuru. Mu gusuzuma neza ibi bipimo no gukoresha imirongo ya mikoroonde nk'igice cy'ibanze ku bindi bikoresho, ibikoresho byinshi bya mikoroonde byacapwe n'ibice bishobora gutegurwa, nka filters, couplers, power dividers/combiners, mixers, nibindi. Ariko uko inshuro ziyongera (iyo zijya ku murongo wa mikoroonde uri hejuru cyane) igihombo cyo kohereza kiriyongera kandi imirasire iragaragara. Kubwibyo, ibyuma biyobora umuyoboro w'amazi nk'ibiyobora umuyoboro w'amazi byakunze gukoreshwa kubera igihombo gito ku murongo wo hejuru (nta mirasire). Imbere muri gikoresho giyobora umuyoboro w'amazi akenshi ni umwuka. Ariko iyo ubyifuje, ushobora kuzuzwa ibikoresho bya dielectric, bigatuma uba muto kurusha waveguide yuzuyemo gaze. Ariko, hollow tube waveguide akenshi ziba nini, zishobora kuba ziremereye cyane cyane ku murongo muto, zikenera ibikoresho byinshi byo kuzikora kandi zirahenze, kandi ntizishobora guhuzwa n'inyubako zacapwe mu buryo bwa planar.

IBICURUZWA BYA ANTENE ZA RFMISO MICROSTRIP:

RM-MA25527-22,25.5-27GHz

RM-MA425435-22,4.25-4.35GHz

Indi ni imiterere y’ubuyobozi ivanze hagati y’imiterere ya microstrip n’umuyoboro w’amazi, witwa substrate integrated waveguide (SIW). SIW ni imiterere isa n’umuyoboro w’amazi ikozwe ku bikoresho bya dielectric, ifite ibyuma biyobora hejuru no hepfo hamwe n’urutonde rw’ibyuma bibiri bihuza impande. Ugereranyije n’imiterere ya microstrip n’umuyoboro w’amazi, SIW ihendutse, ifite inzira yoroshye yo kuyikora, kandi ishobora guhuzwa n’ibikoresho bizunguruka. Byongeye kandi, imikorere ku murongo wo hejuru iruta iyo miterere ya microstrip kandi ifite ubushobozi bwo gutatanya umuyoboro w’amazi. Nkuko bigaragara ku Ishusho ya 1;

Amabwiriza agenga imiterere ya SIW

Inzira zo gupima imiyoboro y’amazi (SIWs) ni inyubako zimeze nk’inzira zo gupima imiyoboro y’amazi zikozwe hakoreshejwe imirongo ibiri y’ibyuma bishyirwa mu cyuma gihuza ibyuma bibiri bifatanye. Imirongo y’ibyuma inyura mu myobo ikora inkuta zo ku ruhande. Iyi nyubako ifite imiterere y’imirongo mito n’inzira zo gupima imiyoboro y’amazi. Uburyo bwo kuyikora busa n’izindi nyubako zishushanyije. Imiterere isanzwe ya SIW igaragazwa ku Ishusho ya 2.1, aho ubugari bwayo (ni ukuvuga itandukanyirizo riri hagati y’inzira mu cyerekezo cya side (as)), umurambararo w’inzira (d) n’uburebure bw’umuvuduko (p) bikoreshwa mu gushushanya imiterere ya SIW. Ibipimo by’ingenzi cyane bya geometrike (bigaragara ku Ishusho ya 2.1) bizasobanurwa mu gice gikurikira. Menya ko uburyo bunini ari TE10, kimwe n’inzira yo gupima imiyoboro y’amazi y’urukiramende. Isano iri hagati y’ingufu z’ingufu z’amazi y’amazi y’umwuka (AFWG) n’ingufu z’amazi y’amazi y’umwuka (DFWG) n’ibipimo a na b ni ingingo ya mbere y’igishushanyo cya SIW. Ku nzifu z’amazi y’umwuka, ingufu z’ingufu z’amazi y’amazi y’amashanyarazi ...

Imiterere y'ibanze ya SIW n'uburyo bwo kubara [1]

aho c ari umuvuduko w'urumuri mu mwanya wigenga, m na n ni uburyo, a ni ingano ndende y'umurongo w'ingufu, naho b ni ingano ngufi y'umurongo w'ingufu. Iyo umurongo w'ingufu ukoze muri TE10 mode, ushobora koroshywa kuri fc = c / 2a; iyo umurongo w'ingufu wuzuyemo dielectric, uburebure bw'uruhande rugari a bubarwa na ad = a / Sqrt (εr), aho εr ari constant dielectric y'uburyo; kugira ngo SIW ikore muri TE10 mode, intera iri hagati y'umwobo p, diameter d n'uruhande rugari nkuko bigomba kuba byujuje formula iri hejuru iburyo bw'ishusho iri hepfo, kandi hari na formula z'ubuhanga za d <λg na p <2d [2];

aho λg ari uburebure bw'umuraba uyoborwa: Muri icyo gihe, ubugari bw'umusarani ntabwo buzagira ingaruka ku gishushanyo cy'ingano ya SIW, ahubwo buzagira ingaruka ku gihombo cy'inyubako, bityo ibyiza byo gutakaza bike by'umusarani ufite ubunini bwinshi bigomba kwitabwaho.

Guhindura Microstrip muri SIW
Iyo imiterere ya microstrip ikeneye guhuzwa na SIW, ihinduka rya microstrip rikozwe mu buryo bwa tapered ni bumwe mu buryo bw'ingenzi bwo guhindura, kandi ihinduka rya tapered rikunze gutanga uburyo bwo guhuza umuyoboro wa interineti ugereranije n'izindi mpinduka zacapwe. Imiterere y'ihinduka yakozwe neza ifite reflection nke cyane, kandi igihombo cyo gushyiramo giterwa ahanini n'igihombo cya dielectric na conductor. Guhitamo substrate n'ibikoresho bya conductor ahanini bigena igihombo cy'ihinduka. Kubera ko ubunini bwa substrate bubangamira ubugari bw'umurongo wa microstrip, ibipimo by'ihinduka rya tapered bigomba guhindurwa iyo ubunini bwa substrate buhindutse. Ubundi bwoko bwa coplanar waveguide (GCPW) nayo ni imiterere ya transmission line ikoreshwa cyane muri sisitemu zifite frequency nyinshi. Conducers zo ku ruhande zegereye umurongo wa transmission wo hagati nazo zikora nk'ubutaka. Mu guhindura ubugari bwa feeder nyamukuru n'icyuho ku butaka bwo ku ruhande, impedance ikenewe irashobora kuboneka.

Microstrip kuva kuri SIW kugeza kuri GCPW kuva kuri SIW

Ishusho iri hepfo ni urugero rw'igishushanyo cya microstrip kuri SIW. Uburyo bukoreshwa ni Rogers3003, dielectric constant ni 3.0, igihombo nyacyo ni 0.001, n'ubugari ni 0.127mm. Ubugari bwa feeder ku mpera zombi ni 0.28mm, buhuye n'ubugari bwa antenna feeder. Umurambararo w'umwobo unyuramo ni d=0.4mm, naho intera p=0.6mm. Ingano ya simulation ni 50mm*12mm*0.127mm. Igihombo rusange muri passband ni hafi 1.5dB (bishobora kugabanuka kurushaho binyuze mu kunoza intera iri hagati y'uruhande rugari).