Umfanekiso 1 ubonisa umzobo we-waveguide oqhelekileyo one-slotted, onesakhiwo se-waveguide eside nesincinci esine-slot embindini. Esi sithuba singasetyenziselwa ukudlulisa amaza e-electromagnetic.

umfanekiso 1. Ijiyometri yee-antennas ze-waveguide ezixhaphakileyo ezine-slotted.

I-antenna engaphambili (Y = 0 ubuso obuvulekileyo kwi-xz plane) iyafakwa. Isiphelo esikude sidla ngokuba yi-short circuit (i-metallic enclosure). I-waveguide inokuvuselelwa yi-short dipole (ebonwa ngasemva kwe-cavity slot antenna) kwiphepha, okanye ngomnye u-waveguide.

Ukuqala ukuhlalutya i-antenna yoMfanekiso 1, makhe sijonge imodeli yesekethe. I-waveguide ngokwayo isebenza njengomgca wokudlulisela, kwaye izithuba ezikwi-waveguide zinokubonwa njengeendawo zokungena ezihambelanayo (ezifanayo). I-waveguide ifutshane, ngoko ke imodeli yesekethe eqikelelweyo iboniswe kuMfanekiso 1:

umfanekiso 2. Imodeli yesekethe ye-antenna ye-waveguide enee-slotted.

Indawo yokugqibela isithuba ngumgama "d" ukuya esiphelweni (ojikelezwe ngokufutshane, njengoko kubonisiwe kuMfanekiso 2), kwaye izinto zesithuba zibekwe umgama "L" omnye komnye.

Ubungakanani bomjelo buya kunika isikhokelo sobude be-wavelength. I-wavelegnth yesikhokelo yi-wavelength ngaphakathi kwe-waveguide. I-wavelength yesikhokelo ( ) ngumsebenzi wobubanzi be-waveguide ("a") kunye ne-wavelength yesithuba esikhululekileyo. Kwimo ye-TE01 elawulayo, ubude be-wavelengths yesikhokelo zezi:

Umgama phakathi kwesithuba sokugqibela kunye nesiphelo "d" udla ngokukhethwa ukuba ube yikota yobude be-wavelength. Imeko yethiyori yomgca wothumelo, umgca we-impedance we-quarter-wavelength short-circuit odluliselwa ezantsi yi-open circuit. Ke ngoko, uMfanekiso 2 wehla uye kuthi:

umfanekiso 3. Imodeli yesekethe ye-waveguide enee-slotted esebenzisa utshintsho lwe-quarter-wave length.

Ukuba iparameter ethi "L" ikhethiwe ukuba ibe yi-half wavelength, ngoko i-input ž ohmic impedance ijongwa kumgama we-half wavelength z ohms. I-"L" sisizathu sokuba uyilo lube malunga ne-half wavelength. Ukuba i-antenna ye-waveguide slot yenzelwe ngale ndlela, zonke ii-slots zinokuthathwa njenge-parallel. Ke ngoko, i-input attance kunye ne-input impedance ye-"N" element slotted array inokubalwa ngokukhawuleza ngolu hlobo:

I-input impedance ye-waveguide ngumsebenzi we-slot impedance.

Nceda uqaphele ukuba ezi parameters zoyilo zingasentla zisebenza kuphela kwi-frequency enye. Njengoko i-frequency iqhubeka ukusuka apho uyilo lwe-waveguide lusebenza, kuya kubakho ukuwohloka kokusebenza kwe-antenna. Njengomzekelo wokucinga ngeempawu ze-frequency ze-waveguide ene-slotted, imilinganiselo yesampulu njengomsebenzi we-frequency iya kuboniswa kwi-S11. I-waveguide yenzelwe ukusebenza kwi-10 GHz. Oku kunikwa kwi-coaxial feed ezantsi, njengoko kubonisiwe kuMfanekiso 4.

Umfanekiso 4. I-antenna ye-waveguide efakwe kwi-slotted inikwa amandla yi-coaxial feed.

Iploti ye-S-parameter ephumayo iboniswe ngezantsi.

PHAWULA: I-antenna inomoya omkhulu kakhulu kwi-S11 malunga ne-10 GHz. Oku kubonisa ukuba uninzi lokusetyenziswa kwamandla lukhutshwa kule frequency. I-bandwidth ye-antenna (ukuba ichazwa njenge-S11 ingaphantsi kwe--6 dB) isuka kwi-9.7 GHz ukuya kwi-10.5 GHz, inika i-bandwidth ye-fractional ye-8%. Qaphela ukuba kukwakho ne-resonance ejikeleze i-6.7 kunye ne-9.2 GHz. Ngaphantsi kwe-6.5 GHz, ngaphantsi kwe-cutoff waveguide frequency kwaye phantse akukho mandla akhutshwayo. I-S-parameter plot eboniswe apha ngasentla inika umbono olungileyo wokuba iimpawu ze-bandwidth slotted waveguide frequency zifana njani.

Ipateni yemitha yemitha emithathu ye-waveguide efakwe kwi-slotted iboniswe ngezantsi (oku kubalwe kusetyenziswa iphakheji ye-electromagnetic yamanani ebizwa ngokuba yi-FEKO). Inzuzo yale antenna imalunga ne-17 dB.

Qaphela ukuba kwi-XZ plane (H-plane), ububanzi be-beadwidth buncinci kakhulu (ii-degrees ezi-2-5). Kwi-YZ plane (okanye i-E-plane), ububanzi be-beadwidth bukhulu kakhulu.