I-trihedral reflector, eyaziwa ngokuba yi-corner reflector okanye i-triangular reflector, sisixhobo esijolise ngokungashukumiyo esisetyenziswa rhoqo kwii-antenna nakwiinkqubo ze-radar. Siqulathe ii-planar reflectors ezintathu ezenza isakhiwo esivaliweyo esingunxantathu. Xa i-electromagnetic wave ibetha i-trihedral reflector, iya kubuyiselwa ngasemva kwicala lesiganeko, yenze i-reflection wave elinganayo kwicala kodwa echasene ne-incident wave.

Oku kulandelayo yintshayelelo eneenkcukacha malunga nezibonisi zekona ze-trihedral:

Ulwakhiwo kunye nomgaqo:

I-trihedral corner reflector inee-planar reflectors ezintathu ezibekwe kwindawo efanayo yokuhlangana, zenza unxantathu olinganayo. I-plane reflector nganye sisibuko seplane esinokubonakalisa amaza eziganeko ngokomthetho wokubonakalisa. Xa igagasi lesiganeko lifika kwi-trihedral corner reflector, liya kubonakaliswa yi-planar reflector nganye kwaye ekugqibeleni lenze igagasi elibonakalayo. Ngenxa yejometri ye-trihedral reflector, igagasi elibonakalayo libonakaliswa kwicala elilinganayo kodwa elichaseneyo negagasi lesiganeko.

Iimpawu kunye nezicelo:

1. Iimpawu zokubonakalisa: Ii-trihedral corners reflectors zineempawu zokubonakalisa eziphezulu kwi-frequency ethile. Zingabonakalisa i-incident wave back nge-reflectivity ephezulu, zenze i-reflection signal ecacileyo. Ngenxa yokulingana kwesakhiwo sayo, ulwalathiso lwe-reflection wave oluvela kwi-trihedral reflector lulingana nolwalathiso lwe-incident wave kodwa luchasene nesigaba.

2. Isignali ekhanyayo enamandla: Ekubeni isigaba segagasi elikhanyayo sichasene, xa i-trihedral reflector ichasene necala legagasi lesiganeko, isignali ekhanyayo iya kuba namandla kakhulu. Oku kwenza i-trihedral corner reflector ibe sisicelo esibalulekileyo kwiinkqubo ze-radar ukuphucula isignali ye-echo yethagethi.

3. Ulawulo: Iimpawu zokubonakalisa ze-trihedral corner reflector zibhekiselele kwicala, oko kukuthi, isignali yokubonakalisa enamandla iya kuveliswa kuphela kwi-engile ethile yesiganeko. Oku kuyenza ibe luncedo kakhulu kwii-antennas zecala kunye neenkqubo ze-radar zokufumana nokulinganisa iindawo ekujoliswe kuzo.

4. Kulula kwaye kuyabiza: Ulwakhiwo lwe-trihedral corner reflector lulula kwaye kulula ukulwenza nokulufaka. Luhlala lwenziwe ngezinto zesinyithi, ezifana ne-aluminium okanye i-copper, ezixabiso liphantsi.

5. Iindawo zokusetyenziswa: Ii-trihedral corner reflectors zisetyenziswa kakhulu kwiinkqubo ze-radar, unxibelelwano olungenazingcingo, ukuhamba ngenqwelomoya, ukulinganisa kunye nokubeka indawo kunye nezinye iindawo. Zingasetyenziswa njengokuchonga iithagethi, ukujikeleza, ukufumana indlela kunye ne-antenna yokulinganisa, njl.

Ngezantsi siza kwazisa le mveliso ngokweenkcukacha:

Ukwandisa indlela i-antenna ekhokela ngayo, isisombululo esilula kukusebenzisa i-reflector. Umzekelo, ukuba siqala nge-antenna yocingo (masithi i-antenna ye-half-wave dipole), singabeka iphepha eliqhubayo emva kwalo ukuze liqondise imitha kwicala eliya phambili. Ukwandisa indlela i-directivity ngayo, i-corner reflector ingasetyenziswa, njengoko kubonisiwe kuMfanekiso 1. I-engile phakathi kwee-plates iya kuba yi-90 degrees.

Umfanekiso 1. Ijiyometri yeConer Reflector.

Ipateni yemitha yale antenna inokuqondwa ngokusebenzisa ithiyori yomfanekiso, uze ubale isiphumo ngethiyori ye-array. Ukuze kube lula ukuhlalutya, siza kuthatha ukuba iipleyiti ezibonisayo azinasiphelo ngobukhulu. Umfanekiso 2 ongezantsi ubonisa usasazo olulinganayo lomthombo, olusebenzayo kummandla ophambi kweepleyiti.

Umfanekiso 2. Imithombo elinganayo kwindawo ekhululekileyo.

Izangqa ezinamachaphaza zibonisa ii-antenna ezikwisigaba kunye ne-antenna yokwenyani; ii-antenna ezingaphandle kwe-x'd zikude ngama-degrees ali-180 ukusuka kwisigaba ukuya kwi-antenna yokwenyani.

Masithi i-antenna yokuqala inepatheni ye-omnidirectional enikwe yi-（）. Emva koko ipatheni yemitha (R) "iseti elinganayo yeeradiyetha" zoMfanekiso 2 zingabhalwa ngolu hlobo:

Oku kungasentla kulandela ngqo kwiFigure 2 kunye ne-array theory (k yinombolo yamaza. Ipatheni ephumayo iya kuba ne-polarization efanayo ne-antenna yokuqala e-polarized vertical. I-directivity iya kwandiswa nge-9-12 dB. I-equation engasentla inika amasimi akhutshwe kwingingqi ephambi kwamasimi. Ekubeni besicinga ukuba amasimi angenasiphelo, amasimi angasemva kwamasimi ayi-zero.

Isikhokelo siya kuba sesona siphezulu xa u-d eyi-half-wavelength. Ukuba into ekhupha imitha kwiFigure 1 yi-dipole emfutshane enepatheni enikwe ngu-(), amasimi ale meko aboniswe kwiFigure 3.

Umfanekiso 3. Iipateni ze-Polar kunye ne-azimuth zepateni yemitha eqhelekileyo.

Ipateni yemitha, ukuthintela kunye nokufumana kwe-antenna kuya kuchaphazeleka ngumgama.dyoMfanekiso 1. I-input impedance inyuswa yi-reflector xa isithuba sisiqingatha sobude bomda; ingancitshiswa ngokususa i-antenna kufutshane ne-reflector.Lii-reflectors ezikuMfanekiso 1 zihlala ziyi-2*d. Nangona kunjalo, ukuba ulandela i-ray ehamba nge-y-axis ukusuka kwi-antenna, oku kuya kubonakaliswa ukuba ubude buyi-( ). Ukuphakama kweepleyiti kufuneka kube kubude kune-element ekhupha imitha; nangona kunjalo, ekubeni ii-antenna ezithe ngqo zingakhanyisi kakuhle kwi-z-axis, le parameter ayibalulekanga kakhulu.