Chowunikira cha trihedral, chomwe chimadziwikanso kuti chowunikira chamakona kapena chowunikira cha triangle, ndi chipangizo chomwe chimagwiritsidwa ntchito kwambiri mu ma antenna ndi ma radar system. Chimakhala ndi zowunikira zitatu zozungulira zomwe zimapanga kapangidwe ka triangle kotsekedwa. Pamene mafunde a electromagnetic agunda chowunikira cha trihedral, chidzawonekeranso motsatira njira ya ngoziyo, ndikupanga mafunde owunikira omwe ali ofanana mbali koma mosiyana ndi mafunde a ngoziyo.

Zotsatirazi ndi chiyambi chatsatanetsatane cha zowunikira pakona za trihedral:

Kapangidwe ndi mfundo:

Chowunikira cha ngodya ya trihedral chimakhala ndi zowunikira zitatu zozungulira zomwe zili pakati pa malo olumikizirana, ndikupanga kansalu kofanana. Chowunikira chilichonse cha ndege ndi galasi la ndege lomwe limatha kuwonetsa mafunde amwadzidzidzi malinga ndi lamulo la kuwunikira. Pamene mafunde amwadzidzidzi agunda chowunikira cha ngodya ya trihedral, chidzawunikiridwa ndi chowunikira chilichonse cha planar ndipo pamapeto pake chimapanga mafunde owunikiridwa. Chifukwa cha mawonekedwe a chowunikira cha trihedral, mafunde owunikiridwa amawunikiridwa mofanana koma mosiyana ndi mafunde amwadzidzidzi.

Makhalidwe ndi Mapulogalamu:

1. Makhalidwe a Kuwunikira: Ma Trihedral corner reflectors ali ndi makhalidwe apamwamba a kuwunikira pa nthawi inayake. Amatha kuwonetsa mafunde a chochitikacho mmbuyo ndi kuwunikira kwakukulu, ndikupanga chizindikiro chowonekera cha kuwunikira. Chifukwa cha kufanana kwa kapangidwe kake, njira ya mafunde owunikira kuchokera ku trihedral reflector ndi yofanana ndi njira ya mafunde a chochitikacho koma mosiyana ndi gawo.

2. Chizindikiro chowala kwambiri: Popeza gawo la mafunde owala ndi losiyana, pamene chowala cha trihedral chili moyang'anizana ndi komwe mafunde akuchitika, chizindikiro chowala chidzakhala champhamvu kwambiri. Izi zimapangitsa kuti chowala cha trihedral corner chikhale chofunikira kwambiri mu radar systems kuti chiwonjezere chizindikiro cha echo cha cholinga.

3. Kuwongolera: Makhalidwe a chiwonetsero cha chowunikira cha ngodya cha trihedral ndi olunjika, kutanthauza kuti, chizindikiro champhamvu chowunikira chidzapangidwa kokha pa ngodya inayake ya chochitika. Izi zimapangitsa kuti chikhale chothandiza kwambiri mu ma antenna olunjika ndi machitidwe a radar pofufuza ndikuyesa malo omwe akufuna.

4. Yosavuta komanso yotsika mtengo: Kapangidwe ka chowunikira chamakona cha trihedral ndi kosavuta kupanga ndikuyika. Nthawi zambiri chimapangidwa ndi zinthu zachitsulo, monga aluminiyamu kapena mkuwa, zomwe zimakhala ndi mtengo wotsika.

5. Magawo ogwiritsira ntchito: Zowunikira pakona za Trihedral zimagwiritsidwa ntchito kwambiri mu radar systems, kulumikizana popanda zingwe, kuyenda mu ndege, kuyeza ndi malo ndi magawo ena. Zingagwiritsidwe ntchito ngati chizindikiritso cha cholinga, kusinthasintha, kupeza komwe kukuchokera ndi antenna yoyezera, ndi zina zotero.

Pansipa tikuwonetsani mwatsatanetsatane za izi:

Kuti muwonjezere kuwongolera kwa antenna, njira yabwino kwambiri ndiyo kugwiritsa ntchito chowunikira. Mwachitsanzo, ngati tiyamba ndi antenna ya waya (tiyerekeze kuti antenna ya theka la mafunde a dipole), tikhoza kuyika pepala lowongolera kumbuyo kwake kuti liwongolere kuwala kutsogolo. Kuti muwonjezere kuwongolera, chowunikira cha kona chingagwiritsidwe ntchito, monga momwe zasonyezedwera pa Chithunzi 1. Ngodya pakati pa mbale idzakhala madigiri 90.

Chithunzi 1. Jiyomethri ya Chowunikira Pakona.

Kapangidwe ka kuwala kwa antenna iyi kangamveke pogwiritsa ntchito chiphunzitso cha chithunzi, kenako kuwerengera zotsatira zake kudzera mu chiphunzitso cha array. Kuti zikhale zosavuta kusanthula, tiganiza kuti ma plate owunikira ndi opanda malire. Chithunzi 2 pansipa chikuwonetsa kugawa kofanana kwa magwero, kovomerezeka kudera lomwe lili patsogolo pa ma plate.

Chithunzi 2. Magwero ofanana mu malo omasuka.

Mabwalo okhala ndi madontho amasonyeza ma antenna omwe ali mu gawo limodzi ndi antenna yeniyeni; ma antenna a x'd out ali pa madigiri 180 kunja kwa gawo limodzi ndi antenna yeniyeni.

Tangoganizani kuti antenna yoyambirira ili ndi mawonekedwe ozungulira mbali zonse omwe aperekedwa ndi （）. Kenako mawonekedwe a radiation (R) ya "ma radiator ofanana" a Chithunzi 2 akhoza kulembedwa motere:

Zomwe zili pamwambapa zikutsatira mwachindunji kuchokera ku Chithunzi 2 ndi chiphunzitso cha array (k ndi nambala ya mafunde. Kapangidwe kameneka kadzakhala ndi polarization yofanana ndi antenna yoyambirira yokhala ndi polarized vertically. Directivity idzawonjezeka ndi 9-12 dB. Equation yomwe ili pamwambapa imapereka minda yowala m'chigawo chomwe chili patsogolo pa ma plate. Popeza tinkaganiza kuti ma plate anali opanda malire, minda yomwe ili kumbuyo kwa ma plate ndi zero.

Chitsogozocho chidzakhala chapamwamba kwambiri pamene d ndi theka la mafunde. Poganiza kuti chinthu chowala cha Chithunzi 1 ndi dipole lalifupi lokhala ndi mawonekedwe operekedwa ndi ( ), minda ya nkhaniyi ikuwonetsedwa mu Chithunzi 3.

Chithunzi 3. Mawonekedwe a polar ndi azimuth a mawonekedwe abwinobwino a radiation.

Kapangidwe ka ma radiation, impedance ndi phindu la antenna zidzakhudzidwa ndi mtunda.dChithunzi 1. Kuyimitsidwa kwa chowunikira kumawonjezeka ndi chowunikira pamene mtunda uli theka la kutalika kwa mafunde; ukhoza kuchepetsedwa posuntha antenna pafupi ndi chowunikira.Lmwa zowunikira zomwe zili mu Chithunzi 1 nthawi zambiri zimakhala 2*d. Komabe, ngati mukutsatira ray yomwe ikuyenda motsatira y-axis kuchokera ku antenna, izi zidzawonetsedwa ngati kutalika kwake kuli osachepera ( ). Kutalika kwa ma plate kuyenera kukhala kotalika kuposa chinthu chowunikira; komabe popeza ma antenna olunjika samawonekera bwino motsatira z-axis, parameter iyi si yofunika kwambiri.