Iindaba - Ukuguqulwa kwamandla kwii-antenna ze-radar

Kwiisekethe ze-microwave okanye iisistim, yonke isekethe okanye inkqubo ihlala iqulunqwe zizixhobo ezininzi ezisisiseko ze-microwave ezifana nezihluzi, ii-couplers, izahluli zamandla, njl.njl enye enelahleko encinci;

Kuyo yonke inkqubo ye-radar yesithuthi, ukuguqulwa kwamandla kubandakanya ukuhanjiswa kwamandla ukusuka kwitshiphu ukuya kwi-feeder kwibhodi ye-PCB, ukuhanjiswa kwe-feeder kumzimba we-eriyali, kunye ne-radiation esebenzayo yamandla nge-eriyali. Kuyo yonke inkqubo yokudlulisa amandla, inxalenye ebalulekileyo kuyilo lomguquli. Abaguquli kwiinkqubo zamaza amaza ubukhulu becala babandakanya i-microstrip ukuya kwi-substrate i-waveguide ehlanganisiweyo (SIW) ukuguqulwa, i-microstrip ukuya kwi-waveguide conversion, i-SIW kwi-waveguide conversion, i-coaxial ukuya kwi-waveguide conversion, i-waveguide yokuguqulwa kwe-waveguide kunye neentlobo ezahlukeneyo zokuguqulwa kwe-waveguide. Lo mba uya kugxila kuyilo lokuguqulwa kwe-microband SIW.

Iindidi ezahlukeneyo zezakhiwo zothutho

I-Microstripsesinye sezona zixhobo zisetyenziswa kakhulu kwizakhelo ze-microwave ezisezantsi. Iinzuzo zayo eziphambili ziyisakhiwo esilula, ixabiso eliphantsi kunye nokudibanisa okuphezulu kunye namacandelo okunyuka komhlaba. Umgca we-microstrip oqhelekileyo wenziwa usebenzisa abaqhubi kwelinye icala le-dielectric layer substrate, eyenza indiza enye yomhlaba kwelinye icala, kunye nomoya ngaphezu kwayo. I-conductor ephezulu ngokusisiseko yinto eqhubayo (ngokuqhelekileyo ubhedu) eyenziwe ngocingo oluncinci. Ububanzi bomgca, ubukhulu, imvume ehambelanayo, kunye ne-dielectric loss tangent ye-substrate yiparameters ezibalulekileyo. Ukongezelela, ubukhulu be-conductor (oko kukuthi, ubukhulu be-metallization) kunye ne-conductivity ye-conductor nayo ibalulekile kwiifrikhwensi eziphezulu. Ngokuqwalasela ngononophelo ezi parameters kunye nokusebenzisa iilayini ze-microstrip njengeyunithi esisiseko kwezinye izixhobo, izixhobo ezininzi ze-microwave eziprintiweyo kunye namalungu anokuthi ayilwe, njengezihluzi, i-couplers, izahluli zamandla / abahlanganisi, abaxube, njl. amaza ee-microwave aphezulu ngokwentelekiso) iilahleko zothumelo ziyanyuka kwaye kuyenzeka ukusasazeka kwemitha. Ke ngoko, ii-waveguides zetyhubhu ezingenanto ezifana ne-rectangular waveguides zikhethwa ngenxa yelahleko encinci kumaza aphezulu (akukho mitha). Ingaphakathi le-waveguide lidla ngokuba ngumoya. Kodwa ukuba unqwenela, inokuzaliswa ngezinto ze-dielectric, inike i-cross-section encinci kune-waveguide egcwele igesi. Nangona kunjalo, ii-tube waveguides ezingenanto zihlala zininzi, zinokuba nzima ngakumbi kwii-frequencies ezisezantsi, zifuna iimfuno eziphezulu zokuvelisa kwaye zibiza kakhulu, kwaye azikwazi ukuhlanganiswa kunye nezakhiwo eziprintiweyo ezicwangcisiweyo.

RFMISO MICROSTRIP ANTENNA PRODUCTS:

RM-MA25527-22,25.5-27GHz

RM-MA425435-22,4.25-4.35GHz

Olunye ulwakhiwo lwesikhokelo se-hybrid phakathi kwesakhiwo se-microstrip kunye ne-waveguide, ebizwa ngokuba yi-substrate edibeneyo ye-waveguide (SIW). I-SIW lulwakhiwo oludityanisiweyo olufana nolwamaza elenziwe kwimathiriyeli ye-dielectric, enee-conductor phezulu nasezantsi kunye noluhlu olumngcelele lweentsimbi ezimbini ezenza iindonga ezisecaleni. Xa kuthelekiswa ne-microstrip kunye nezakhiwo ze-waveguide, i-SIW inexabiso eliphantsi, inenkqubo yokuvelisa elula, kwaye inokuhlanganiswa kunye nezixhobo ezicwangcisiweyo. Ukongeza, ukusebenza kwiifrikhwensi eziphezulu kungcono kunokwakhiwa kwe-microstrip kwaye ineempawu zokusasazwa kwe-waveguide. Njengoko kubonisiwe kuMfanekiso 1;

SIW izikhokelo zoyilo

I-Substrate edibeneyo yamaza e-waveguides (i-SIWs) idityanisiwe njenge-waveguide-efana nezakhiwo ezenziwe ngokusebenzisa imiqolo emibini yentsimbi efakwe kwi-dielectric edibanisa iipleyiti zetsimbi ezimbini ezihambelanayo. Imiqolo yesinyithi ngokusebenzisa imingxuma yenza iindonga ezisecaleni. Esi sakhiwo sineempawu zemigca ye-microstrip kunye ne-waveguides. Inkqubo yokuvelisa iyafana nezinye izakhiwo ezisicaba eziprintiweyo. Ijiyometri ye-SIW eqhelekileyo ibonisiwe kuMfanekiso 2.1, apho ububanzi bayo (okt ukwahlula phakathi kwe-vias kwicala elisecaleni (as)), idiameter ye-vias (d) kunye nobude bepitch (p) zisetyenziselwa ukuyila ubume be-SIW. Iiparamitha zejometri ezibaluleke kakhulu (eziboniswe kuMfanekiso 2.1) ziya kuchazwa kwicandelo elilandelayo. Qaphela ukuba eyona ndlela iphambili yi-TE10, kanye njenge-waveguide yoxande. Ubudlelwane phakathi kwe-fc ye-cutoff frequency ye-air-filled waveguides (AFWG) kunye ne-dielectric-filled waveguides (DFWG) kunye nemilinganiselo a kunye ne-b yindawo yokuqala yoyilo lwe-SIW. Kwimikhombandlela ezaliswe ngumoya, i-cutoff frequency iboniswe kwifomula engezantsi

Ulwakhiwo olusisiseko lwe-SIW kunye nefomula yokubala[1]

apho u-c isantya sokukhanya kwindawo ekhululekileyo, m kunye no-n ziimowudi, ubungakanani be-waveguide ende, kwaye u-b bubukhulu obufutshane be-waveguide. Xa i-waveguide isebenza kwimo ye-TE10, inokwenziwa lula ukuba fc=c/2a; xa i-waveguide izaliswe nge-dielectric, ubude becala elibanzi a libalwa nge-ad=a/Sqrt(εr), apho i-εr yi-dielectric constant ye-medium; ukuze Ukwenza i-SIW isebenze kwimo ye-TE10, isithuba sokugqitha emngxunyeni p, idiameter d kunye necala elibanzi njengoko kufanele ukwanelisa ifomyula kwicala eliphezulu lasekunene lomzobo ongezantsi, kwaye kukwakho iifomyula ezinobungqina be-d <λg kunye ne-p<2d [ 2];

apho i-λg bububude obukhokelwayo bobude bemaza: Kwangaxeshanye, ubukhulu bendawo engaphantsi komhlaba abuyi kuchaphazela uyilo lobungakanani be-SIW, kodwa iyakuchaphazela ilahleko yesakhiwo, ngoko ke ilahleko ephantsi yeenzuzo zokutyeba okuphezulu kufuneka kuthathelwe ingqalelo. .

Microstrip ukuba SIW uguqulelo
Xa ulwakhiwo lwe-microstrip kufuneka ludityaniswe ne-SIW, i-tapered microstrip transition yenye yeendlela eziphambili ezikhethiweyo zokutshintsha, kwaye ukutshintshwa kwe-tapered ngokuqhelekileyo kunika umdlalo obanzi xa kuthelekiswa nezinye iinguqu eziprintiweyo. Isakhiwo soguqulo esenziwe kakuhle sineebonakaliso eziphantsi kakhulu, kwaye ilahleko yokufaka ibangelwa ngokuyinhloko yilahleko ye-dielectric kunye ne-conductor. Ukukhethwa kwe-substrate kunye nezixhobo ze-conductor ikakhulu kugqiba ukulahlekelwa kwenguqu. Ekubeni ubukhulu be-substrate buthintela ububanzi bomgca we-microstrip, iiparitha zenguqu ye-tapered kufuneka zilungiswe xa ubukhulu be-substrate buguquka. Olunye uhlobo lwe-waveguide coplanar waveguide (GCPW) lukwasetyenziswa ngokubanzi kwi-transmission line structure kwii-high-frequency systems. Iikondaktara ezisecaleni ezikufutshane nomgca wothumelo ophakathi nazo zisebenza njengendawo ephantsi. Ngokulungelelanisa ububanzi be-feeder ephambili kunye ne-gap kumhlaba wecala, i-impedance yeempawu ezifunekayo inokufumaneka.

I-Microstrip ukuya kwi-SIW kunye ne-GCPW ukuya kwi-SIW

Lo mzobo ungezantsi ungumzekelo woyilo lwe-microstrip ukuya kwi-SIW. I-medium esetyenzisiweyo yi-Rogers3003, i-dielectric constant yi-3.0, ixabiso lelahleko lokwenyani ngu-0.001, kunye nobukhulu be-0.127mm. Ububanzi be-feeder kuzo zombini iziphelo yi-0.28mm, ehambelana nobubanzi be-eriyali feeder. Idayamitha yokuphumela emngxunyeni yi d=0.4mm, kwaye isithuba p=0.6mm. Ubungakanani bokulinganisa yi-50mm * 12mm * 0.127mm. Ilahleko iyonke kwi-passband imalunga ne-1.5dB (enokuthi incitshiswe ngakumbi ngokulungiselela izithuba ezibanzi).