I-antenna ye-log-periodic yi-antenna ebanzi-ibhendi yayo yokusebenza isekelwe kwi-resonance kunye ne-log-periodic structure. Eli nqaku liza kukwazisa kwakhona kwii-eriyali ze-log-periodic ezivela kwiinkalo ezintathu: imbali, umgaqo-nkqubo wokusebenza kunye neenzuzo ze-antenna ze-log-periodic.

Imbali yee-antenna ze-log-periodic

I-antenna ye-Log-periodic yi-eriyali ebanzi-ibhendi enokuyila kwayo isekelwe kwisakhiwo se-log-periodic. Imbali yee-antenna ze-log-periodic zibuyela kwi-1950s.

I-antenna ye-log-periodic yaqalwa ngo-1957 ziinjineli zaseMelika uDwight Isbell kunye noRaymond DuHamel. Ngelixa besenza uphando eBell Labs, bayila i-eriyali ebanzi ekwaziyo ukugquma iibhendi zamaza amaninzi. Esi sakhiwo se-eriyali sisebenzisa ijiyometri ye-log-periodic, eyinika iimpawu ezifanayo zokusasazeka kwemitha kulo lonke uluhlu lwamaza.

Kumashumi eminyaka alandelayo, ii-antenna ze-log-periodic ziye zasetyenziswa ngokubanzi kwaye zafundwa. Zisetyenziswa kwiindawo ezinjengonxibelelwano olungenazingcingo, ukwamkela umabonakude kunye nonomathotholo, iinkqubo zeradar, imilinganiselo yerediyo, kunye nophando lwezenzululwazi. Iimpawu ze-wide-band ze-antenna ze-log-periodic zibenza bakwazi ukugubungela iibhendi ezininzi ze-frequency, ukunciphisa imfuno yokutshintsha rhoqo kunye nokutshintshwa kwe-eriyali, kunye nokuphucula ukuguquguquka kwenkqubo kunye nokusebenza kakuhle.

Umgaqo wokusebenza we-antenna ye-log-periodic isekelwe kwisakhiwo sayo esikhethekileyo. Iqulathe uluhlu lwamacwecwe esinyithi atshintshanayo, ngalinye likhula ngobude kunye nesithuba ngokwexesha lelogarithmic. Esi sakhiwo sibangela ukuba i-eriyali ivelise umahluko wesigaba kwiifrikhwensi ezahlukeneyo, ngaloo ndlela ifezekisa i-radiation ye-wide band.

Njengoko iteknoloji ihambela phambili, uyilo kunye neendlela zokwenza ii-antenna ze-log-periodic ziphuculwe. Ii-antenna zanamhlanje ze-log-periodic zisebenzisa izinto eziphambili kunye neenkqubo zokuvelisa ukuphucula ukusebenza kwe-antenna kunye nokuthembeka.

Umgaqo wayo wokusebenza unokuchazwa ngokufutshane ngolu hlobo lulandelayo

1. Umgaqo we-resonance: Uyilo lwe-antenna ye-log-periodic isekelwe kumgaqo we-resonance. Kwi-frequency ethile, ubume be-eriyali iya kwenza i-loop ye-resonant, ivumela i-eriyali ukuba ifumane ngokufanelekileyo kwaye ikhuphe amaza ombane wombane. Ngokuyila ngokuchanekileyo ubude kunye nesithuba samaphepha esinyithi, i-antenna ye-log-periodic inokusebenza kwiintlobo ezininzi ze-resonant frequency.

2. Umahluko weSigaba: Umlinganiselo welogi-periodic wobude bentsimbi yentsimbi kunye nesithuba se-antenna ye-log-periodic ibangela ukuba iqhekeza ngalinye lesinyithi livelise umahluko wesigaba kwiifrikhwensi ezahlukeneyo. Lo mahluko wesigaba ukhokelela ekuziphatheni okuvakalayo kwe-eriyali kwiifrikhwensi ezahlukeneyo, ngaloo ndlela ivumela ukusebenza kwebhendi ebanzi. Amaqhekeza amafutshane esinyithi asebenza kumaza aphezulu, ngelixa amaqhekeza amade esinyithi asebenza kumaza asezantsi.

3. I-Beam scanning: Ubume be-antenna ye-log-periodic yenza ukuba ibe neempawu ezahlukeneyo zemitha kwiifrikhwensi ezahlukeneyo. Njengoko i-frequency itshintsha, isalathiso semitha kunye nobubanzi be-eriyali nayo iyatshintsha. Oku kuthetha ukuba ii-antenna ze-log-periodic zinokuskena kwaye zilungelelanise imiqadi ngaphezulu kwebhendi yamaza obubanzi.

Izinto eziluncedo kwii-antenna ze-log-periodic

1. Iimpawu zeBroadband: I-antenna ye-Log-periodic i-eriyali ebanzi-band ekwazi ukugubungela iibhendi zamaza amaninzi. Ulwakhiwo lwayo lwe-log-periodic lwenza ukuba i-antenna ibe neempawu ezifanayo zemitha kulo lonke uluhlu lwamaza, ukuphelisa isidingo sokutshintsha rhoqo okanye ukutshintshwa kwe-eriyali, ukuphucula ukuguquguquka kwenkqubo kunye nokusebenza kakuhle.

2. Ukuzuza okuphezulu kunye nokusebenza kakuhle kwemitha: Ii-antenna ze-Log-periodic zihlala zinenzuzo ephezulu kunye nokusebenza kakuhle kwemitha. Ulwakhiwo lwayo luvumela i-resonance kuluhlu lwamaza amaninzi, ukubonelela ngemitha eyomeleleyo kunye namandla okwamkela.

3. Ulawulo lwe-Directivity: Ii-antenna ze-Log-periodic zihlala zikhomba, oko kukuthi, zinemitha eyomeleleyo okanye amandla okwamkela kwiindlela ezithile. Oku kwenza ukuba i-antenna ze-log-periodic zilungele izicelo ezifuna ulwalathiso lwemitha ethile, njengonxibelelwano, irada, njl.

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

5. Ukusebenza kwe-Anti-interference: I-antenna ye-Log-periodic inomsebenzi omhle wokuchasana nokuphazamiseka kwi-band frequency band. Ubume bayo buvumela i-eriyali ukuba ihluze ngcono imiqondiso yefrikhwensi engafunwayo kwaye iphucule ukuxhathisa kwenkqubo ekuphazamisekeni.

Ngamafutshane, ngokuyila ngokuchanekileyo ubude kunye nesithuba samaphepha esinyithi, i-antenna ye-log-periodic inokusebenza kwiindidi ezininzi ze-resonant frequency, kunye neempawu zebhendi ebanzi, inzuzo ephezulu kunye nokusebenza kakuhle kwemitha, ulawulo oluchanekileyo, uyilo lwenkqubo olulula kunye nokuchasana nokuphazamiseka. . iinzuzo zokusebenza. Oku kwenza ukuba ii-antenna ze-logarithmic periodic zisetyenziswe ngokubanzi kunxibelelwano olungenazingcingo, irada, uphando lwezenzululwazi kunye namanye amacandelo.