Umfanekiso 1 ubonisa umdwebo ojwayelekile we-waveguide slotted, onesakhiwo eside nesincane se-waveguide esine-slot phakathi.Lesi slot singasetshenziswa ukudlulisa amagagasi kagesi.
umfanekiso 1. Ijiyomethri yezimpondo ezivame kakhulu slotted waveguide.
I-front-end (Y = 0 ubuso obuvulekile endizeni ye-xz) ithiyo iyaphakelwa.Ukuphela okude kuvame ukujikeleza okufushane (i-metallic enclosure).I-waveguide ingase ijatshuliswe i-dipole emfushane (ebonwa ngemuva kwe-cavity slot antenna) ekhasini, noma ngenye i-waveguide.
Ukuqala ukuhlaziya i-antenna yoMfanekiso 1, ake sibheke imodeli yesekethe.I-waveguide ngokwayo isebenza njengolayini wokudlulisela, futhi izikhala ku-waveguide zingabhekwa njengokuvuma okuhambisanayo (okuhambisanayo).I-waveguide inomjikelezo omfushane, ngakho-ke imodeli yesekethe elinganiselwe iboniswa kuMfanekiso 1:
umfanekiso 2. Imodeli yesiyingi ye-antenna ye-waveguide slotted.
Imbobo yokugcina iyibanga elithi "d" ukuya ekugcineni (elifinyezwayo, njengoba kukhonjisiwe kuMfanekiso 2), futhi izakhi ze-slot zihlukaniswe ibanga "L" ukusuka kwenye.
Ubukhulu be-groove buzonikeza umhlahlandlela we-wavelength.Igayidi ye-wavelegnth ubude begagasi obungaphakathi kwe-waveguide.Ubude begagasi begayidi ( ) buwumsebenzi wobubanzi be-waveguide ("a") kanye nobude besikhala esikhululekile.Kumodi ye-TE01 evelele, amaza wamaza okuqondisa yilawa:
Ibanga phakathi kwesikhala sokugcina nesiphetho esithi "d" livame ukukhethwa ukuthi libe yikota ye-wavelength.Isimo setiyori solayini wokudlulisa, ulayini we-quarter-wavelength wesifunda esifushane odluliselwe phansi uyisekethe evulekile.Ngakho-ke, Umfanekiso 2 wehlisela ku:
isithombe 3. Imodeli yesekethe ye-waveguide efakwe usebenzisa ukuguqulwa kwekota-wavelength.
Uma ipharamitha ethi "L" ikhethwa ukuthi ibe ubude begagasi elinguhhafu, okokufaka okuthi ž ohmic impedance ibukwa ebangeni elinguhhafu we-wavelength z ohms.I-"L" iyisizathu sokuthi umklamo ube cishe uhhafu we-wavelength.Uma i-antenna ye-waveguide slot yakhelwe ngale ndlela, khona-ke zonke izikhala zingabhekwa njengokufana.Ngakho-ke, ukungena okokufaka kanye nokuvinjwa kokufakwayo kwento ethi "N" yamalungu afanayo afakiwe ingabalwa ngokushesha njengalokhu:
I-impedance yokufaka ye-waveguide iwumsebenzi we-slot impedance.
Sicela uqaphele ukuthi amapharamitha wedizayini angenhla avumeleke kuphela ngefrikhwensi eyodwa.Njengoba imvamisa isuka lapho umklamo we-waveguide usebenza, kuzoba nokuwohloka ekusebenzeni kwe-antenna.Njengesibonelo sokucabanga ngezici zemvamisa ye-waveguide slotted, izilinganiso zesampula njengomsebenzi wemvamisa zizoboniswa ku-S11.I-waveguide yakhelwe ukusebenza ku-10 GHz.Lokhu kunikezwa kumphakeli we-coaxial ngezansi, njengoba kuboniswe kuMfanekiso 4.
Umfanekiso 4. I-antenna ye-waveguide slotted iphakelwa i-coaxial feed.
Umphumela wesakhiwo sepharamitha ye-S uboniswa ngezansi.
QAPHELA: I-antenna inokwehla okukhulu kakhulu ku-S11 cishe ku-10 GHz.Lokhu kubonisa ukuthi ukusetshenziswa kwamandla okuningi kukhishwa ngale mvamisa.Umkhawulokudonsa we-antenna (uma uchazwa ngokuthi i-S11 ingaphansi kuka -6 dB) usuka cishe ku-9.7 GHz uye ku-10.5 GHz, unikeza umkhawulokudonsa oyingxenyana ongu-8%.Qaphela ukuthi kukhona ne-resonance ezungeze i-6.7 ne-9.2 GHz.Ngaphansi kuka-6.5 GHz, ngaphansi kwe-cutoff waveguide frequency futhi cishe awekho amandla akhishwayo.Isakhiwo sepharamitha ye-S esiboniswe ngenhla sinikeza umbono omuhle wokuthi izici zokuvama kwe-bandwidth slotted waveguide zifana nani.
Iphethini yemisebe enezinhlangothi ezintathu ye-waveguide slotted iboniswa ngezansi (lokhu kubalwe kusetshenziswa iphakheji yenombolo kazibuthe kagesi ebizwa ngokuthi i-FEKO).Inzuzo yale antenna cishe i-17 dB.
Qaphela ukuthi endizeni ye-XZ (i-H-plane), ubude be-beamwid buncane kakhulu (ama-2-5 degrees).Endizeni ye-YZ (noma i-E-plane), ubude be-beamwid bukhulu kakhulu.
Isingeniso somkhiqizo we-Slotted Waveguide Antenna:
RM-SWA910-22,9-10GHz
Isikhathi sokuthumela: Jan-05-2024
