Iindlela Zokondla I-Microstrip Antenna: Iintlobo kunye Nokukhetha

Yintoni iMicrostrip Antenna Feed?

I-feed idibanisa umthombo we-RF okanye umamkeli kwi-patch ekhupha imitha ngelixa iguqula i-impedance yenkqubo kwi-impedance yokufaka i-antenna. Kuyilo olusebenzayo, i-feed iyinxalenye ye-antenna endaweni yeenkcukacha ezahlukeneyo. I-geometry yayo itshintsha usasazo lwangoku, i-resonant frequency, ilahleko yokubuya, i-bandwidth esebenzisekayo kunye ne-radiation engafunekiyo.

Ii-antenna feeds ze-Microstrip zihlala zahlulwe ngeendlela zokunxibelelana ngqo kunye neendlela ezidityaniswe ngombane. Ii-microstrip line kunye ne-coaxial probe feeds zenza unxibelelwano lombane ngqo ne-patch. Ii-Aperture-coupled kunye ne-proxion-coupled feeds zidlulisela amandla ngokusebenzisa i-electromagnetic coupling kwaye zihlala zisebenzisa ngaphezu kwe-substrate layer engaphezulu kwesinye.

Iindlela ezine eziphambili zokutya i-Microstrip Antenna

1. I-Microstrip Line Feed

Kwi-microstrip line feed, umgca wokudlulisa oprintiweyo uqhagamshelwe ngqo kwi-patch. Umgca kunye ne-patch zingenziwa kwi-substrate efanayo kwinkqubo enye ye-PCB, okwenza le ndlela ibe lula, ingabi nkulu kwaye ifaneleke kwimveliso engabizi kakhulu kunye nee-arrays ezininzi eziprintiweyo.

Ukuthelekiswa kwe-impedance kunokulungiswa ngokutshintsha ububanzi bomgca wokuphakelwa, kusetyenziswa i-inset, ukongeza i-transformer yekota-wave okanye ukwenza ngcono ukudibana phakathi komgca kunye ne-patch. Umda ophambili kukuba umgca wokuphakelwa nawo uyakhazimla. Le radiation iphosakeleyo inokuchaphazela i-cross-polarization kunye nepatheni yemitha, ingakumbi xa i-substrate ityebile okanye inethiwekhi yokuphakelwa inde.

2. Ukutya kweCoaxial Probe

I-coaxial probe feed idlula kwi-ground plane kunye ne-substrate. I-coaxial outer conductor iqhagamshelwe kwi-ground plane, ngelixa i-inner conductor iqhagamshelwe kwi-patch. Ukuhambisa indawo ye-probe kubonelela ngendlela elula yokukhetha ukumelana nokufaka okufunekayo ngaphandle kokuprinta umgca wokuphakelwa kumphezulu okhanyayo.

Le ndlela inika indawo yokutyela eguquguqukayo kunye nemitha ye-feed-line ephantsi ngokubanzi, kodwa ifuna ukubhola kunye noqhagamshelo lombane oluthembekileyo. Iprobe ende ingenisa i-inductance, ngoko ke ukusebenza kwayo kunokonakala xa usebenzisa ii-substrates ezinobukhulu bombane okanye xa usebenzisa ii-frequency eziphezulu. I-connector geometry, i-solder volume kunye nokunyamezelana kokwenziwa kwayo kufuneka kufakwe kwimodeli yokugqibela.

3. I-Aperture-Coupled Feed

I-feed edibeneyo ne-aperture ibeka umgca wokudlulisa ngaphantsi kwe-plane yomhlaba kunye ne-patch engaphezulu kwayo. Amandla adlula kwindawo ekwi-plane yomhlaba. Ngenxa yokuba i-plane yomhlaba yahlula inethiwekhi yokutya kwi-patch ekhupha imitha, olu lungiselelo lubonelela ngokwahlukana okuhle kokuya kwi-radiator kwaye lunokunciphisa i-radiation engafunekiyo yokutya.

Ubukhulu besloti, indawo yesloti, i-feed-line stub, ubukhulu be-substrate kunye ne-dielectric constants zonke zichaphazela ukudibana kunye nokufanisa. Ukudibanisa i-Aperture kunokuxhasa i-bandwidth ebanzi kunezinye ii-feeds ezithe ngqo, kodwa kufuna isakhiwo esinee-multilayer kunye nokulungelelaniswa ngokuchanekileyo phakathi komgca, i-sloti kunye ne-patch.

4. Isondlo esidibeneyo kufutshane

Kwi-feed edibeneyo, ekwabizwa ngokuba yi-feed edibeneyo nge-electromagnetically, umgca we-microstrip ubekwa phantsi kwe-patch kwaye wahlulwe kuyo ngumaleko we-dielectric. Lo mgca ugqubana nenxalenye ye-patch, kwaye amandla adluliselwa ngentsimi ye-electromagnetic. Akukho nxibelelwano lombane ngqo kwaye akukho ndawo kwiplani yomhlaba.

Ubude bokugqithana, indawo yomgca, iipropati ze-substrate kunye nobukhulu bomaleko zilawula ukudibana. Le ndlela inokubonelela nge-bandwidth ebanzi ye-impedance kunye ne-radiation ephantsi ye-spurious, kodwa ulwakhiwo lwemaleko amabini lutyebile kwaye lunovelwano ngakumbi kukulungelelaniswa kunye nokunyamezelana kokubopha.

Ukuthelekiswa kweendlela zokutya ze-Microstrip Antenna

Indlela yokondla	Amandla e-bandwidth aqhelekileyo	Ukwenziwa	Imitha yokondla / ukwahlulwa	Ilungele kakhulu
Umgca weMicrostrip	Mxinwa ukuya phakathi	I-PCB elula, enomaleko omnye	Imitha engaphezulu ye-feed-line	Uyilo oluprintiweyo oluphantsi, olungabizi kakhulu kunye nee-arrays
Iprobe yeCoaxial	Mxinwa ukuya phakathi	Ukubhola kunye nokudibanisa ngokuthe nkqo	Imitha ye-feed-line ephantsi	Ukulungiswa kwendawo yokuphakelwa kwezinto enye okuguquguqukayo
Idityaniswe ne-Aperture	Ephakathi ukuya ebanzi	I-Multilayer enolungelelwaniso lweslothi	Ukwahlulwa kokutya okulungileyo	Uyilo olufuna ukwahlulwahlulwa kunye ne-bandwidth ebanzi
Idibene kufutshane	Banzi	I-Multilayer enokulungelelaniswa okugqithileyo	Imitha engaphantsi engcolileyo	Uyilo lwe-Broadband apho ubukhulu obongezelelweyo bamkelekile khona

Ezi ziindlela zoyilo ezihambelanayo, azizizo iziqinisekiso zokusebenza ezizinzileyo. Ubume bepetshi, ukulahleka kwe-substrate, ukungaguquguquki kwe-dielectric, ubukhulu, i-frequency, ubude be-feed-network kunye nokunyamezelana kokwenziwa kunokutshintsha isiphumo.

Indlela Yokukhetha Indlela Efanelekileyo Yokondla

• I-bandwidth efunekayo:Ii-feeds ezithe ngqo zihlala zanele kwiinkqubo ze-narrowband. Ukudibanisa i-Aperture okanye i-proximity kungakhethwa xa i-bandwidth ebanzi ye-impedance iyimfuneko ephambili.
• Iprofayili kunye nenani leeleya:I-microstrip line feed igcina isakhiwo sincinci kwaye kulula ukusenza. Ii-coupled feeds zifuna iileya ezongezelelweyo kunye nokulungelelaniswa.
• Ubumsulwa bemitha:Ukuba imitha ye-feed-network okanye ukuhlukaniswa kwangaphakathi nangasemva kubaluleke kakhulu, isakhiwo esidityaniswe nomngxuma sinokuhlukanisa i-feed kwi-patch.
• Ukudibanisa uluhlu:Iinethiwekhi ze-microstrip eziprintiweyo zilungele ii-arrays, kodwa ukulahleka komgca kunye nemitha ye-parasitic iyanda njengoko inethiwekhi iba nde. Uyilo lwe-Corporate-feed kunye nokunyamezelana kwe-amplitude/phase kufuneka zivavanywe kunye.
• Ukuphindaphinda kunye nokunyamezelana:Kwiifrikhwensi ze-millimeter-wave, utshintsho lwe-connector, ukunyamezelana kwe-etching, ubukhulu be-substrate kunye neempazamo zokubhalisa ziba zibalulekileyo kumbane.
• Imida yamandla kunye nobushushu:Ukulahleka komqhubi, ukufudumeza nge-dielectric, uxinano lwangoku lwe-connector kunye noxinzelelo lwentsimi yendawo kufuneka kuhlolwe inqanaba lamandla elicetywayo.
• Ixabiso kunye nokuphindaphindwa:Uyilo olune-bandwidth eyilwe kakuhle lusenokungabi lolona khetho lubalaseleyo lwemveliso ukuba lufuna ukubopha okunzima okanye ukulungelelaniswa okuqinileyo kwe-multilayer.

Indlela yokukhetha indawo yokuphakela iCoaxial Probe

Indawo echanekileyo yokuprobe yindawo ebonisa i-target input impedance ngelixa ivuselela imo ecetywayo nge-cross-polarization eyamkelekileyo. Akufanele ikhethwe ngokuzenzekelayo kwiziko le-patch, kwindawo ephezulu yombane okanye kwindawo ephezulu yamandla ombane.

Kwipatshi eqhelekileyo engunxande esebenza kwimo yayo esisiseko, ukumelana kokufaka ngokuqhelekileyo kuphezulu kufutshane nomphetho okhanyayo kwaye kuncipha njengoko i-feed isiya embindini ngokwemilinganiselo ye-resonant. Inqaku le-50-ohm lidla ngokufumaneka phakathi komphetho kunye nombindi. Indawo echanekileyo ixhomekeke kubukhulu bepatshi, iipropati ze-substrate, ububanzi be-probe, iplani yomhlaba, isixhumi kunye nezakhiwo ezikufutshane.

1. Qala ngemilinganiselo ye-patch ukuze ufumane i-resonant frequency efunekayo kunye ne-polarization.
2. Beka iprobe kumgca ofanelekileyo wokulinganisa ukuze uncede ekuvuseleleni imo oyifunayo kwaye unciphise amasimi anqamlezileyo.
3. Tshayela i-offset ukusuka kumda okhanyayo kwimodeli ye-electromagnetic egcwele amaza apheleleyo de kufikelelwe kwi-impedance ekujoliswe kuyo kunye nokulahleka kokubuya.
4. Bandakanya i-coaxial transition, i-probe inductance, i-solder pad, i-finite ground plane, i-enclosure kunye ne-radome xa ziyinxalenye yendibano yokugqibela.
5. Yakha imodeli yokunyamezelana nobukhulu be-substrate, i-dielectric constant, i-etching kunye ne-feed-position error.
6. Qinisekisa i-antenna eyenziweyo nge-calibrated vector network analyzer kwaye ulungise kuphela emva kokuthelekisa umlinganiselo kunye ne-simulation reference planes.

Ukuhlolwa koYilo kunye nokulinganisa

Ukulungiswa kwesondlo kufuneka kuqinisekiswe ngokuchasene nexabiso le-S-parameter engaphezulu kwesinye. Uhlolo olupheleleyo ludla ngokuquka:

• I-Resonant frequency, i-S11, ilahleko yokubuya, i-VSWR kunye ne-bandwidth ye-impedance.
• Impedance yokufaka yokwenyani neyokucingelwa kuyo yonke ibhendi yokusebenza.
• Ukusebenza kakuhle ngokupheleleyo, inzuzo efunyenweyo kunye nokulahleka komqhubi/i-dielectric.
• Iipateni zemitha ezidityanisiweyo kunye nezidityanisiweyo ezinqamlezileyo kwiindawo eziphambili.
• Umlinganiselo ophakathi kwengaphambili nengasemva, ii-sidelobes kunye nokuphazamiseka kwepateni okubangelwa yi-feed okanye i-connector.
• Ukusasazwa kwangoku kunye nobungqina beendlela zomphezulu ongafunekiyo okanye iindlela zolandelelwano oluphezulu.
• Ukusebenza phantsi kobushushu obulindelekileyo, i-radome, indawo yokuhlala, i-cable-routing kunye neemeko zokufakela.

Izicelo

Ii-antenna ze-microstrip kunye nee-arrays zisetyenziswa kwii-terminals zonxibelelwano ezingenazingcingo, izixhobo zesathelayithi kunye nezokuzulazula, izinzwa ze-radar, i-telemetry, amaqonga e-aerospace, iinkqubo zovavanyo kunye neemveliso ze-RF ezihlanganisiweyo. Uyilo lwe-feed kufuneka lukhethwe ngokweemfuno zenkqubo yokwenyani: i-feed elula eprintiweyo inokuba yeyona ifanelekileyo kwiyunithi ye-narrowband encinci, ngelixa i-feed edibeneyo inokuba yeyokuba ne-bandwidth ebanzi okanye ukuhlukaniswa okunamandla.

Imibuzo ebuzwa qho

Yeyiphi indlela yokondla i-antenna ye-microstrip eyona ilula?

I-microstrip line feed idla ngokuba yeyona ilula kuba i-line kunye ne-patch zinokuprintwa kwi-substrate enye. Kulula ukuyidibanisa nenethiwekhi ye-planar feed, nangona i-radiation ye-feed-line kufuneka ilawulwe.

Yeyiphi indlela yokondla enika i-bandwidth ebanzi?

Ii-feeds ezidityaniswe kufutshane nezidityaniswe ne-aperture zihlala zibonelela ngamandla amakhulu e-bandwidth kune-feeds ezisisiseko ezithe ngqo. I-bandwidth yokwenyani isaxhomekeke kwi-geometry epheleleyo ye-antenna kunye ne-substrate stack.

Yeyiphi i-feed enika indawo engcono kakhulu yokwahlulwa ukusuka kwindawo ekhupha imisebe?

Ukudibanisa i-Aperture kunika ukwahlulwa okuqinileyo kwesakhiwo kuba iplani yomhlaba yahlula umgca wokuphakelwa kwi-patch. Ukuvuza kwe-slot kunye ne-back radiation kusafuneka kuhlolwe.

Ngaba indawo yokuphakela iyayitshintsha i-resonant frequency?

Eyona njongo yayo kukulinganisa i-impedance, kodwa i-probe okanye umgca ukwaphazamisa amasimi e-electromagnetic. Ii-probes ezinkulu, ii-probes ezinde, i-coupling enamandla okanye i-feed ekufutshane nommandla wentsimi obuthathaka inokutshintsha i-resonance kunye ne-input impedance.

Yintoni umahluko phakathi kokutya kunye nokuhambelana kwe-impedance?

Ukondla kuchaza indlela amandla e-RF athunyelwa ngayo kwi-patch. Ukulinganisa i-Impedance yinkqubo yokwenza ukuba i-antenna input ihambelane nomgca wokudlulisela, oqhele ukuba yi-50 ohms. Indawo yokondla kunye nejometri zizinto ezibalulekileyo ezihambelanayo, kodwa ii-transformers ezongezelelweyo, ii-insets, ii-stubs okanye iinethiwekhi zokufanisa nazo zingasetyenziswa.

Isiphelo

Ukukhetha i-microstrip antenna feed sisigqibo esithathwa kwinqanaba lenkqubo. Ii-Microstrip line kunye ne-coaxial probe feeds zikhetha ukulula kunye nokulungiswa ngokuthe ngqo, ngelixa i-aperture kunye ne-probe coupling zibonelela ngokwahlukana okuqinileyo okanye i-bandwidth ebanzi ngexabiso leeleya ezongezelelweyo kunye nolawulo lokwenziwa oluqinileyo. Ukusebenza kokugqibela kufuneka kuqinisekiswe rhoqo ngokulinganisa amaza apheleleyo, uhlalutyo lokunyamezelana kunye nokulinganisa okulinganisiweyo.

Iingcebiso zeMveliso ye-Microstrip Antenna

Hlola i-RF MISOiimveliso ze-antenna ze-microstripngezantsi, okanyenxibelelana neqela lethu lobunjineliukuxoxa ngemigangatho yefrikhwensi, inzuzo, i-polarization, i-interface kunye neemfuno zokudibanisa.