I-antenna ye-log-periodic iyi-antenna enebhendi ebanzi esimiso sayo sokusebenza sisekelwe ekuqineni kwezwi kanye nesakhiwo se-log-periodic. Lesi sihloko sizokwethula futhi kuma-antenna e-log-periodic avela ezicini ezintathu: umlando, isimiso sokusebenza kanye nezinzuzo zama-antenna e-log-periodic.

Umlando wama-antenna e-log-periodic

I-antenna ye-log-periodic iyi-antenna enebhendi ebanzi emklamo wayo usekelwe esakhiweni se-log-periodic. Umlando wama-antenna e-log-periodic uqala emuva ngawo-1950.

I-antenna ye-log-periodic yasungulwa okokuqala ngo-1957 onjiniyela baseMelika uDwight Isbell noRaymond DuHamel. Ngesikhathi benza ucwaningo eBell Labs, baklama i-antenna ye-broadband ekwazi ukumboza ama-frequency band amaningi. Lesi sakhiwo se-antenna sisebenzisa i-geometry ye-log-periodic, eyinika izici ezifanayo zokukhanya kulo lonke ibanga le-frequency.

Emashumini eminyaka alandela, ama-antenna e-log-periodic asetshenziswe kabanzi futhi afundwa kabanzi. Asetshenziswa ezindaweni ezifana nokuxhumana okungenantambo, ukwamukela ithelevishini nomsakazo, izinhlelo ze-radar, ukulinganisa umsakazo, kanye nocwaningo lwesayensi. Izici ze-wide-band zama-antenna e-log-periodic ziwenza akwazi ukumboza ama-frequency band amaningi, ukunciphisa isidingo sokushintsha imvamisa kanye nokushintsha ama-antenna, kanye nokuthuthukisa ukuguquguquka nokusebenza kahle kohlelo.

Isimiso sokusebenza se-antenna ye-log-periodic sisekelwe esakhiweni sayo esikhethekile. Siqukethe uchungechunge lwamapuleti ensimbi ashintshanayo, ngalinye likhula ngobude nesikhala ngokwesikhathi se-logarithmic. Lesi sakhiwo sibangela ukuthi i-antenna ikhiqize umehluko wesigaba kumaza ahlukene, ngaleyo ndlela ifinyelele emisebeni ye-wide-band.

Njengoba ubuchwepheshe buthuthuka, izindlela zokuklama nokukhiqiza ama-antenna e-log-periodic ziye zathuthuka. Ama-antenna e-log-periodic esimanje asebenzisa izinto ezithuthukisiwe kanye nezinqubo zokukhiqiza ukuthuthukisa ukusebenza kwe-antenna kanye nokuthembeka.

Isimiso sayo sokusebenza singachazwa kafushane kanje:

1. Umgomo Wokuzwakala Komsindo: Umklamo we-antenna ye-log-periodic usekelwe kumgomo wokuzwakala komsindo. Ngemvamisa ethile, isakhiwo se-antenna sizokwakha i-resonant loop, okuvumela i-antenna ukuthi yamukele futhi ikhiphe amaza kagesi ngempumelelo. Ngokuklama ngokunembile ubude nesikhala samashidi ensimbi, ama-antenna e-log-periodic angasebenza kumabanga amaningi emvamisa yokuzwakala komsindo.

2. Umehluko wesigaba: Isilinganiso se-log-periodic sobude bengxenye yensimbi kanye nesikhala se-antenna ye-log-periodic kubangela ukuthi ingxenye ngayinye yensimbi ikhiqize umehluko wesigaba kumafrikhwensi ahlukene. Lo mehluko wesigaba uholela ekuziphatheni kwe-antenna okuzwakalayo kumafrikhwensi ahlukene, ngaleyo ndlela kuvumela ukusebenza kwebhendi ebanzi. Izingcezu zensimbi ezimfushane zisebenza kumafrikhwensi aphezulu, kuyilapho izingcezu zensimbi ezinde zisebenza kumafrikhwensi aphansi.

3. Ukuskena ngomsebe: Isakhiwo se-antenna ye-log-periodic senza sibe nezici zomsebe ezahlukene kumafrikhwensi ahlukene. Njengoba ifrikhwensi ishintsha, isiqondiso somsebe kanye nobubanzi bomsebe we-antenna nakho kuyashintsha. Lokhu kusho ukuthi ama-antenna e-log-periodic angaskena futhi alungise imisebe phezu kwebhendi yefrikhwensi ebanzi.

Izinzuzo zama-antenna e-log-periodic

1. Izici ze-Broadband: I-antenna ye-log-periodic iyi-antenna ye-wide-band engamboza ama-frequency band amaningi. Isakhiwo sayo se-log-periodic senza i-antenna ibe nezici ezifanayo zokukhanya kulo lonke ibanga lemvamisa, isuse isidingo sokushintsha imvamisa noma ukushintshwa kwe-antenna, ithuthukise ukuguquguquka nokusebenza kahle kwesistimu.

2. Ukusebenza kahle kwe-radiation ephezulu kanye nokuthola imisebe: Ama-antenna e-log-periodic ngokuvamile anokuthola okuphezulu kanye nokuthola imisebe kahle. Isakhiwo sawo sivumela ukuzwakala kwemisindo ebangeni elihlukahlukene lamaza, okunikeza amandla aqinile e-radiation kanye nokwamukela imisebe.

3. Ukulawulwa Kokuqondisa: Ama-antenna e-log-periodic avame ukuba aqondiswe ngqo, okungukuthi, anamakhono okukhanya aqinile noma okwamukela ngezindlela ezithile. Lokhu kwenza ama-antenna e-log-periodic afanele izinhlelo zokusebenza ezidinga ukuqondiswa kokukhanya okuthile, njengokuxhumana, i-radar, njll.

4. Yenza kube lula ukwakheka kwesistimu: Njengoba ama-antenna e-log-periodic angamboza ububanzi bemvamisa, ukwakheka kwesistimu kungenziwa kube lula futhi inani lama-antenna lingancishiswa. Lokhu kusiza ukunciphisa izindleko zesistimu, ukunciphisa ubunzima nokuthuthukisa ukuthembeka.

5. Ukusebenza kokulwa nokuphazamiseka: I-antenna ye-log-periodic isebenza kahle ekulwa nokuphazamiseka ebhendini elibanzi lemvamisa. Isakhiwo sayo senza i-antenna ikwazi ukuhlunga kangcono amasignali emvamisa angafuneki futhi ithuthukise ukumelana kwesistimu nokuphazamiseka.

Ngamafuphi, ngokuklama ngokunembile ubude kanye nesikhala samashidi ensimbi, i-antenna ye-log-periodic ingasebenza kumabanga amaningi emvamisa ye-resonant, enezici ze-wide-band, ukusebenza kahle kwe-gain ephezulu kanye nemisebe, ukulawulwa kokuqondisa, ukwakheka kwesistimu okulula kanye nezinzuzo zokusebenza ezilwa nokuphazamiseka. Lokhu kwenza ama-antenna e-logarithmic periodic asetshenziswe kabanzi ekuxhumaneni okungenantambo, i-radar, ucwaningo lwesayensi kanye neminye imikhakha.