I-antenna ye-log-periodic yi-antenna enebhendi ebanzi enomgaqo wayo wokusebenza osekelwe kwi-resonance kunye nesakhiwo se-log-periodic. Eli nqaku liza kukwazisa nakwii-antenna ze-log-periodic kwiinkalo ezintathu: imbali, umgaqo wokusebenza kunye neenzuzo zee-antenna ze-log-periodic.

Imbali yee-antenna ze-log-periodic

I-antenna ye-log-periodic yi-antenna ebanzi enoyilo olusekelwe kwisakhiwo se-log-periodic. Imbali yee-antenna ze-log-periodic iqala kwiminyaka yoo-1950.

I-antenna ye-log-periodic yaqalwa ngo-1957 ziinjineli zaseMelika uDwight Isbell noRaymond DuHamel. Ngethuba besenza uphando kwiBell Labs, bayila i-antenna ye-broadband ekwaziyo ukugubungela iibhendi ezininzi ze-frequency. Olu lwakhiwo lwe-antenna lusebenzisa i-log-periodic geometry, eyinika iimpawu ezifanayo zemitha kulo lonke uluhlu lwe-frequency.

Kwiminyaka eyalandelayo, ii-antenna ze-log-periodic ziye zasetyenziswa kakhulu kwaye zafundwa. Zisetyenziswa kwiindawo ezifana nonxibelelwano olungenazingcingo, ukwamkelwa kwethelevishini kunye nonomathotholo, iinkqubo ze-radar, ukulinganiswa kwerediyo, kunye nophando lwesayensi. Iimpawu ze-wide-band zee-antenna ze-log-periodic zizenza zikwazi ukugubungela iibhendi ezininzi ze-frequency, ukunciphisa isidingo sokutshintsha i-frequency kunye nokutshintshwa kwe-antenna, kunye nokuphucula ukuguquguquka kwenkqubo kunye nokusebenza kakuhle.

Umgaqo wokusebenza we-antenna ye-log-periodic usekelwe kwisakhiwo sayo esikhethekileyo. Iqulathe uthotho lweepleyiti zesinyithi ezitshintshanayo, nganye ikhula ngobude kunye nesithuba ngokwexesha le-logarithmic. Esi sakhiwo sibangela ukuba i-antenna ivelise umahluko wesigaba kwiifrequensi ezahlukeneyo, ngaloo ndlela ifezekisa imitha ye-wide-band.

Njengoko ubuchwepheshe buqhubeka, iindlela zoyilo kunye nokuvelisa ii-antenna ze-log-periodic ziye zaphucuka. Ii-antenna zanamhlanje ze-log-periodic zisebenzisa izixhobo eziphambili kunye neenkqubo zokuvelisa ukuphucula ukusebenza kunye nokuthembeka kwee-antenna.

Umgaqo wayo wokusebenza ungachazwa ngokufutshane ngolu hlobo lulandelayo

1. Umgaqo weResonance: Uyilo lwe-antenna ye-log-periodic lusekelwe kumgaqo we-resonance. Kwi-frequency ethile, ulwakhiwo lwe-antenna luya kwenza i-resonant loop, evumela i-antenna ukuba ifumane kwaye ikhuphe amaza e-electromagnetic ngempumelelo. Ngokuyila ngokuchanekileyo ubude kunye nesithuba seeshiti zesinyithi, ii-antenna ze-log-periodic zinokusebenza kwiindidi ezininzi ze-resonant frequency.

2. Umahluko wesigaba: Umlinganiselo we-log-periodic wobude besiqwenga sesinyithi kunye nendawo ye-antenna ye-log-periodic ibangela ukuba isiqwenga ngasinye sesinyithi sivelise umahluko wesigaba kwiifrequencies ezahlukeneyo. Lo mahluko wesigaba ukhokelela ekuziphatheni kwe-antenna kwiifrequencies ezahlukeneyo, ngaloo ndlela kuvumela ukusebenza kwebhendi ebanzi. Iziqwenga ezimfutshane zesinyithi zisebenza kwiifrequencies eziphezulu, ngelixa iziqwenga ezinde zesinyithi zisebenza kwiifrequencies eziphantsi.

3. Ukuskena ngomqadi: Ulwakhiwo lwe-antenna ye-log-periodic luyenza ibe neempawu ezahlukeneyo zemitha kwiifrequensi ezahlukeneyo. Njengoko ifrequensi itshintsha, indlela yemitha kunye nobubanzi bomqadi we-antenna nazo ziyatshintsha. Oku kuthetha ukuba ii-antenna ze-log-periodic zinokuskena kwaye zilungise imiqadi kwibhendi ebanzi yefriquensi.

Iingenelo zee-antenna ze-log-periodic

1. Iimpawu zeBroadband: I-antenna yeLog-periodic yi-antenna ebanzi enokugubungela iibhendi ezininzi zefrequency. Ulwakhiwo lwayo lwe-log-periodic lwenza i-antenna ibe neempawu ezifanayo zemitha kulo lonke uluhlu lwefrequency, isusa isidingo sokutshintsha ifrequency okanye ukutshintshwa kwe-antenna, iphucula ukuguquguquka kwenkqubo kunye nokusebenza kakuhle.

2. Ukusebenza kakuhle kwemitha kunye nokwanda kwemitha: Ii-antenna ze-log-periodic zihlala zine-gain ephezulu kunye nokusebenza kakuhle kwemitha. Ulwakhiwo lwazo luvumela ukuvakala kwemitha kwiindawo ezininzi zamaza, zibonelela ngemitha enamandla kunye nokukwazi ukwamkela.

3. Ulawulo lwe-Directivity: Ii-antenna ze-log-periodic zihlala zibhekisa kwicala, oko kukuthi, zine-radiation enamandla okanye amandla okwamkela kwicala elithile. Oku kwenza ii-antenna ze-log-periodic zilungele ukusetyenziswa okudinga i-radiation directional ethile, njengonxibelelwano, i-radar, njl.njl.

4. Yenza lula uyilo lwenkqubo: Ekubeni ii-antenna ze-log-periodic zinokugubungela uluhlu olubanzi lwee-frequency, uyilo lwenkqubo lunokwenziwa lula kwaye inani lee-antenna linokuncitshiswa. Oku kunceda ukunciphisa iindleko zenkqubo, ukunciphisa ubunzima kunye nokuphucula ukuthembeka.

5. Ukusebenza kokungaphazanyiswa: I-antenna ye-log-periodic inamandla okungaphazanyiswa kakuhle kwi-wide frequency band. Ulwakhiwo lwayo lwenza i-antenna ikwazi ukucoca ngcono imiqondiso ye-frequency engafunekiyo kwaye iphucule ukumelana kwenkqubo nokuphazamiseka.

Ngamafutshane, ngokuyila ngokuchanekileyo ubude kunye nendawo yeeshiti zesinyithi, i-antenna ye-log-periodic ingasebenza kwiindidi ezininzi ze-resonant frequency, eneempawu ze-wide-band, ukusebenza kakuhle kwe-gain ephezulu kunye ne-radiation, ulawulo lwe-directivity, uyilo lwenkqubo olula kunye neenzuzo zokusebenza ezichasene nokuphazamiseka. Oku kwenza ii-antenna ze-logarithmic periodic zisetyenziswe kakhulu kunxibelelwano olungenazingcingo, i-radar, uphando lwesayensi kunye nezinye iinkalo.