Mufananidzo 1 unoratidza yakajairwa slotted waveguide diagram, ine refu uye nhete waveguide chimiro chine slot pakati.Iyi slot inogona kushandiswa kufambisa mafungu emagetsi.

mufananidzo 1. Geometry yeanonyanyozivikanwa slotted waveguide antennas.

Iyo yekumberi-kuguma (Y = 0 yakavhurika kumeso mu xz ndege) antenna inodyiswa.Kure kumagumo kazhinji kupfupi dunhu (metallic enclosure).Iyo waveguide inogona kunakidzwa nepfupi dipole (inoonekwa kuseri kwegomba slot antenna) pane peji, kana neimwe waveguide.

Kutanga kuongorora mufananidzo 1 antenna, ngatitarisei muenzaniso wedunhu.Iyo waveguide pachayo inoita setambo yekufambisa, uye iyo inotsvedza mune waveguide inogona kutariswa seyakafanana (yakafanana) kubvuma.Iyo waveguide ipfupi-yakatenderedzwa, saka iyo yakaenzana yedunhu modhi inoratidzwa muMufananidzo 1:

mufananidzo 2. Circuit model of slotted waveguide antenna.

Iyo yekupedzisira slot ndeye chinhambwe "d" kusvika kumagumo (iyo ipfupi-inotenderera, sezvakaratidzwa muFigure 2), uye iyo slot zvinhu zvakapatsanurwa chinhambwe "L" kubva kune mumwe nemumwe.

Ukuru hwe groove huchapa mutungamiri kune wavelength.Gwara rewavelegnth iwavelength iri mukati megwaidhi remasaisai.Iyo gwara wavelength ( ) ibasa rehupamhi hwewaveguide ("a") uye nzvimbo yemahara yewavelength.Kune inotungamira TE01 modhi, iwo ekutungamira wavelengths ndeaya:

Nhambwe iri pakati pekupedzisira slot uye yekupedzisira "d" inowanzosarudzwa kuve kota wavelength.Iyo theoretical mamiriro emutsetse wekutapurirana, iyo kota-wavelength pfupi-yedunhu impedance mutsara inopfuudzwa ichidzika yakavhurika dunhu.Nokudaro, Mufananidzo 2 unoderedza ku:

mufananidzo 3. Slotted waveguide circuit model uchishandisa kota-wavelength shanduko.

Kana parameter "L" yakasarudzwa kuita hafu yewavelength, ipapo iyo yekuisa ž ohmic impedance inoonekwa pahafu yewavelength chinhambwe z ohms.Iyo "L" chikonzero chekugadzira kuve nehafu yewavelength.Kana iyo waveguide slot antenna yakagadzirwa nenzira iyi, saka ese anotsvedza anogona kutariswa akafanana.Naizvozvo, iyo yekupinza yekubvumidzwa uye yekupinza impedance ye "N" element slotted array inogona kukurumidza kuverengerwa se:

Iyo yekupinza impedance yewaveguide ibasa reiyo slot impedance.

Ndokumbira utarise kuti madhizaini ari pamusoro anongoshanda pane imwe frequency.Sezvo frequency inoenderera kubva ipapo iyo waveguide dhizaini inoshanda, pachave nekudzikira mukuita kweantenna.Semuenzaniso wekufunga nezve frequency maitiro eiyo slotted waveguide, zviyero zvemuenzaniso sebasa re frequency zvicharatidzwa muS11.Iyo waveguide yakagadzirirwa kushanda pa10 GHz.Izvi zvinopihwa kune coaxial feed pazasi, sezvakaratidzwa mumufananidzo 4.

Mufananidzo 4. Iyo slotted waveguide antenna inodyiswa necoaxial feed.

Iyo inokonzeresa S-parameter chirongwa inoratidzwa pazasi.

CHERECHEDZA: Iyo antenna ine yakakura kwazvo yekudonha paS11 panosvika gumi GHz.Izvi zvinoratidza kuti mazhinji ekushandiswa kwemagetsi anovhenekerwa panguva iyi.Iyo antenna bandwidth (kana ichitsanangurwa seS11 isingasviki -6 dB) inoenda kubva pa9.7 GHz kuenda ku10.5 GHz, ichipa chikamu bandwidth che8%.Ziva kuti kune zvakare resonance yakatenderedza 6.7 uye 9.2 GHz.Pazasi pe6.5 GHz, pazasi pe cutoff waveguide frequency uye rinenge pasina simba rinovhenekerwa.Iyo S-parameta dhizaini inoratidzwa pamusoro inopa yakanaka zano reiyo bandwidth slotted waveguide frequency maitiro akafanana.

Iwo matatu-dimensional emwaranzi maitiro eiyo slotted waveguide inoratidzwa pazasi (izvi zvakaverengerwa uchishandisa nhamba yemagetsi emagetsi package inonzi FEKO).Kuwana kweiyi antenna kunosvika 17 dB.