Trihedral reflector, yomwe imadziwikanso kuti corner reflector kapena triangular reflector, ndi chipangizo chongolunjika chomwe chimagwiritsidwa ntchito mu tinyanga ndi makina a radar. Zimapangidwa ndi zowunikira zitatu zomwe zimapanga mawonekedwe otsekedwa katatu. Mafunde a electromagnetic akagunda chowonetsera katatu, amawonekeranso kumbuyo komwe kunachitika, ndikupanga mafunde owoneka bwino omwe ali ofanana mbali koma mosiyana ndi gawo la mafunde a chochitikacho.

Zotsatirazi ndikuyambitsa mwatsatanetsatane kwa trihedral corner reflectors:

Kapangidwe ndi mfundo:

Chowonetsera pamakona atatu chimakhala ndi zowunikira zitatu zokhazikika pamphambano wamba, kupanga makona atatu ofanana. Ndege iliyonse yowunikira ndi galasi la ndege lomwe limatha kuwonetsa mafunde a zochitika molingana ndi lamulo lowunikira. Pamene chiwongolero cha zochitika chigunda chowonetsera pakona ya trihedral, chimawonetsedwa ndi chowunikira chilichonse ndipo pamapeto pake chimapanga mawonekedwe owoneka bwino. Chifukwa cha geometry ya trihedral reflector, mafunde owonetseredwa amawonetsedwa mofanana koma mosiyana ndi mafunde a zochitika.

Mawonekedwe ndi Mapulogalamu:

1. Mawonekedwe owunikira: Zowunikira pakona za Trihedral zimakhala ndi mawonekedwe apamwamba pama frequency ena. Itha kuwonetsa zomwe zikuchitika mmbuyo ndikuwunikira kwambiri, ndikupanga chizindikiro chowonekera. Chifukwa cha symmetry ya kapangidwe kake, mayendedwe a mafunde omwe amawonekera kuchokera ku trihedral reflector ndi ofanana ndi momwe mafunde amachitikira koma mosiyana mu gawo.

2. Chizindikiro champhamvu chowonetsera: Popeza gawo la mafunde owonetseredwa ndi losiyana, pamene chiwonetsero cha trihedral chimakhala chotsutsana ndi momwe mafunde akuchitikira, chizindikirocho chidzakhala champhamvu kwambiri. Izi zimapangitsa kuti chowonetsera pakona ya trihedral ikhale yofunika kwambiri pamakina a radar kuti ikweze chizindikiro chandamale.

3. Kuwongolera: Mawonekedwe owunikira a trihedral corner reflector ndi njira, ndiko kuti, chizindikiro champhamvu chidzangopangidwa pa ngodya yapadera. Izi zimapangitsa kuti zikhale zothandiza kwambiri pamakina olowera ndi ma radar pofufuza ndikuyeza malo omwe mukufuna.

4. Zosavuta komanso zachuma: Kapangidwe ka trihedral corner reflector ndi yosavuta komanso yosavuta kupanga ndi kukhazikitsa. Nthawi zambiri amapangidwa ndi zitsulo zachitsulo, monga aluminiyamu kapena mkuwa, zomwe zimakhala ndi mtengo wotsika.

5. Minda yogwiritsira ntchito: Zowonetsera zapakona za Trihedral zimagwiritsidwa ntchito kwambiri mu machitidwe a radar, mauthenga opanda zingwe, kuyenda kwa ndege, kuyeza ndi kuika ndi madera ena. Itha kugwiritsidwa ntchito ngati chizindikiritso cha chandamale, kuyambira, kupeza mayendedwe ndi mlongoti wowongolera, ndi zina.

M'munsimu tidzafotokozera mankhwalawa mwatsatanetsatane:

Kuti muwonjezere kuwongolera kwa mlongoti, njira yabwino kwambiri ndiyo kugwiritsa ntchito chowunikira. Mwachitsanzo, ngati tiyamba ndi mlongoti wa waya (tinene kuti mlongoti wa dipole wa theka), titha kuyika pepala lowongolera kumbuyo kwake kuti liwongolere ma radiation kutsogolo. Kuti muwonjezere kuwongolera, chowonetsera ngodya chingagwiritsidwe ntchito, monga momwe tawonetsera pa Chithunzi 1. Mbali pakati pa mbale idzakhala madigiri 90.

Chithunzi 1. Geometry ya Corner Reflector.

Ma radiation a antenna iyi amatha kumveka pogwiritsa ntchito nthano ya zithunzi, kenako kuwerengera zotsatira zake pogwiritsa ntchito malingaliro osiyanasiyana. Kuti tiwunike mosavuta, tikuganiza kuti mbale zowunikira ndizopanda malire. Chithunzi 2 pansipa chikuwonetsa kugawa kofanana kwa gwero, koyenera kudera lomwe lili kutsogolo kwa mbale.

Chithunzi 2. Magwero ofanana mu malo aulere.

Mabwalo okhala ndi madontho amawonetsa tinyanga zomwe zili mugawo limodzi ndi mlongoti weniweni; tinyanga ta x'd out ndi madigiri 180 kunja kwa gawo kupita ku mlongoti weniweni.

Tangoganizani kuti mlongoti woyambirira uli ndi mawonekedwe a omnidirectional operekedwa ndi ( (). Kenako mtundu wa radiation (R) ya "ma radiator ofanana" a Chithunzi 2 angalembedwe motere:

Zomwe zili pamwambazi zikutsatira mwachindunji Chithunzi 2 ndi chiphunzitso chotsatira (k ndi nambala yoweyula. Zotsatira zake zidzakhala ndi polarization yofanana ndi mlongoti wa polarized woyambirira. Kuwongolera kudzawonjezedwa ndi 9-12 dB. Equation yomwe ili pamwambayi ikupereka minda yowunikira. m'dera kutsogolo kwa mbale Popeza tinkaganiza kuti mbale zinali zopanda malire, minda kuseri kwa mbale ndi ziro.

Kuwongolera kudzakhala kokwezeka kwambiri pamene d ndi theka-wavelength. Kungoganiza kuti gawo lowunikira la Chithunzi 1 ndi dipole lalifupi lomwe lili ndi mawonekedwe operekedwa ndi ( ), magawo a nkhaniyi akuwonetsedwa pa chithunzi 3.

Chithunzi 3. Polar ndi azimuth machitidwe a normalized radiation chitsanzo.

Mawonekedwe a radiation, impedance ndi kupindula kwa mlongoti kudzakhudzidwa ndi mtundadwa Chithunzi 1. Kulepheretsa kolowera kumawonjezedwa ndi chowunikira pamene kusiyana kuli theka la kutalika kwa kutalika; ikhoza kuchepetsedwa posuntha mlongoti pafupi ndi chowonetsera. KutalikaLmwa zowunikira mu Chithunzi 1 nthawi zambiri zimakhala 2*d. Komabe, ngati kutsata cheza koyenda motsatira y-axis kuchokera ku mlongoti, izi zitha kuwoneka ngati kutalika kwake kuli osachepera ( ). Kutalika kwa mbale ziyenera kukhala zazitali kuposa zowunikira; komabe popeza tinyanga zozungulira sizimawonekera bwino pa z-axis, chizindikiro ichi sichofunikira kwambiri.