I-trihedral reflector, eyaziwa nangokuthi i-reflector yekhona noma i-triangular reflector, iyithuluzi eliqondiwe ngokungenzi lutho elivame ukusetshenziswa kuma-antenna namasistimu e-radar. Iqukethe izibonisi ezintathu zepulani ezakha isakhiwo esivaliwe esingunxantathu. Uma i-electromagnetic wave ishaya isibonisi se-trihedral, izoboniswa emuva eduze nendawo yesigameko, yakhe igagasi elibonakalayo elilingana nendawo kodwa eliphambene nesigaba segagasi lesigameko.

Okulandelayo yisingeniso esiningiliziwe sezibonisi zamakhona we-trihedral:

Isakhiwo nomgomo:

Isibonisi sekhona elingunxantathu siqukethe izibonisi ezintathu zepulani ezigxile endaweni evamile yokuhlangana, okwenza unxantathu olinganayo. Isibonisi ngasinye sendiza yisibuko sendiza esingabonisa amagagasi esigameko ngokuvumelana nomthetho wokubonisa. Uma igagasi lesigameko lishaya isibonisi sekhona le-trihedral, sizoboniswa isibonisi ngasinye sepulani futhi ekugcineni sakhe igagasi elibonakalayo. Ngenxa yejometri yesibonisi se-trihedral, igagasi elibonisiwe liboniswa ngendlela elinganayo kodwa ephambene kunegagasi lesigameko.

Izici Nezicelo:

1. Izici zokubonisa: Izibonisi zekhona lezintathu zinezici zokubonisa eziphezulu ngefrikhwensi ethile. Ingakhombisa igagasi lesigameko libuyele emuva ngokubonakala okuphezulu, kwakhe isignali esobala yokubonisa. Ngenxa yokulinganisa kwesakhiwo sayo, isiqondiso segagasi elibonisiwe kusukela kusibonisi se-trihedral silingana nesiqondiso segagasi lesigameko kodwa ngokuphambene nesigaba.

2. Isignali eqinile ebonisiwe: Njengoba isigaba segagasi elibonisiwe siphambene, lapho isibonisi se-trihedral siphambene nesiqondiso segagasi lesigameko, isignali ebonisiwe izoba namandla kakhulu. Lokhu kwenza isibonisi sekhona le-trihedral sibe isicelo esibalulekile kumasistimu e-radar ukuze kuthuthukiswe isignali ye-echo yethagethi.

3. Ukuqondisa ngqo: Izici zokubonisa zesibonisi sekhona elingunxantathu ziqondise, okusho ukuthi, isignali ekhanyayo izokwenziwa kuphela nge-engeli ethile yesigameko. Lokhu kuyenza ibe wusizo kakhulu kuma-antenna aqondisayo kanye nezinhlelo ze-radar zokuthola nokulinganisa izindawo eziqondiwe.

4. Ilula futhi iyonga: Isakhiwo sekhoneni le-trihedral reflector silula futhi kulula ukusikhiqiza nokusifaka. Ngokuvamile kwenziwa ngezinto zensimbi, njenge-aluminium noma ithusi, enezindleko eziphansi.

5. Izinkambu zokufaka isicelo: Izibonisi zekhoneni le-Trihedral zisetshenziswa kakhulu ezinhlelweni ze-radar, ukuxhumana okungenantambo, ukuzulazula kwezindiza, ukulinganisa nokubeka indawo kanye neminye imikhakha. Ingasetshenziswa njengokuhlonza okuhlosiwe, ukuhlukahluka, ukuthola isiqondiso kanye ne-antenna yokulinganisa, njll.

Ngezansi sizokwethula lo mkhiqizo ngokuningiliziwe:

Ukwandisa ukuqondisa kwe-antenna, isixazululo esinembile ukusebenzisa isibonisi. Isibonelo, uma siqala nge-antenna yocingo (ivumela ukuthi sithi i-dipole antenna ye-half-wave), singabeka ishidi le-conductive ngemuva kwayo ukuze siqondise imisebe eya phambili. Ukuze uqhubeke nokwandisa ukuqondisa, i-reflector yekona ingasetshenziswa, njengoba kuboniswe kuMfanekiso 1. I-angle phakathi kwamapuleti izoba yi-90 degrees.

Umfanekiso 1. Ijometri ye-Corner Reflector.

Iphethini yemisebe yale antenna ingaqondwa ngokusebenzisa ithiyori yesithombe, bese kubalwa umphumela ngethiyori yamalungu afanayo. Ukuze kube lula ukuhlaziya, sizocabanga ukuthi amapuleti abonisayo awapheli ngobubanzi. Umfanekiso wesi-2 ngezansi ubonisa ukusatshalaliswa komthombo okulinganako, okuvumelekile endaweni ephambi kwamapuleti.

Umfanekiso 2. Imithombo elinganayo endaweni yamahhala.

Imibuthano enamachashazi ikhombisa izimpondo ezisesigabeni ezinothi lwangempela; ama-antenna angama-x'd out angama-degree angu-180 ngaphandle kwesigaba ukuya othini lwangempela.

Cabanga ukuthi i-antenna yoqobo inephethini ye-omnidirectional enikezwe ngu-(). Khona-ke iphethini yemisebe (R) "yesethi elinganayo yama-radiator" yoMfanekiso 2 ingabhalwa ngokuthi:

Okungenhla kulandela ngokuqondile kusukela kuMfanekiso 2 kanye nethiyori yamalungu afanayo (k inombolo yegagasi. Iphethini ewumphumela izoba ne-polarization efanayo ne-antenna yasekuqaleni ehlukanisiwe eqondile. Ukuqondisa kuzokwenyuswa ngo-9-12 dB. Isibalo esingenhla sinika izinkambu ezikhanyayo. esifundeni esiphambi kwamapuleti Njengoba sasithatha ngokuthi amapuleti awapheli, amasimu angemuva kwamapuleti ayiziro.

Ukuqondisa kuzoba okuphezulu kakhulu uma u-d engu-half-wavelength. Uma sicabanga ukuthi into ekhipha imisebe yoMfanekiso 1 iyi-dipole emfushane enephethini enikezwe ngu- ( ), izinkambu zaleli cala ziboniswa kuMfanekiso 3.

Umfanekiso 3. Amaphethini we-polar ne-azimuth wephethini yemisebe evamile.

Iphethini yemisebe, i-impedance kanye nenzuzo ye-antenna izothonywa yibangadof Figure 1. I-impedance yokufaka inyuswa isibonisi uma isikhala siwuhhafu we-wavelength; ingancishiswa ngokusondeza uthi oluseduze nesibonisi. UbudeLkwezibonisi kuMfanekiso 1 ngokuvamile ziyi-2*d. Kodwa-ke, uma ukulandelela umsebe ohamba nge-eksisi ka-y ukusuka othi, lokhu kuzobonakala uma ubude buyi- ( ). Ukuphakama kwamapuleti kufanele kube kude kunesici esikhipha imisebe; kodwa njengoba izimpondo zomugqa zingakhanyi kahle ku-axis engu-z, le pharamitha ayibalulekile kakhulu.