Anteenada log-periodic waa anteeno ballaadhan oo mabda'a shaqadu ku salaysan yahay dhawaaq iyo qaab-dhismeedka log-periodic. Maqaalkani waxa kale oo uu ku bari doonaa anteenooyinka log-periodic saddex dhinac: taariikhda, mabda'a shaqada iyo faa'iidooyinka anteenooyinka log-periodic.

Taariikhda anteenooyinka log-periodic

Anteenada Log-periodic waa anteeno ballaadhan oo nashqaddeedu ku salaysan tahay qaab-dhismeedka-Log-periodic. Taariikhda anteenooyinka log-periodic waxay dib ugu noqotaa 1950-meeyadii.

Anteenada log-periodic waxaa markii ugu horreysay ikhtiraacay 1957-kii injineero Mareykan ah Dwight Isbell iyo Raymond DuHamel. Intii ay cilmi-baadhis ka samaynayeen Bell Labs, waxay nashqadeen anteeno ballaadhan oo awood u leh inay daboosho xargaha soo noqnoqda ee badan. Qaab dhismeedka anteenada waxa ay isticmaasha joomatari waqti-Log-periodic, kaas oo siinaya sifooyin shucaac la mid ah inta jeer ee kala duwan.

Tobannaan sano ee soo socda, anteenooyinka log-periodic ayaa si ballaaran loo isticmaalay oo la darsay. Waxaa loo adeegsadaa meelaha ay ka midka yihiin isgaarsiinta wireless-ka, soo dhaweynta telefishinka iyo raadiyaha, nidaamyada radar, cabbirrada raadiyaha, iyo cilmi-baarista sayniska. Astaamaha ballaaran ee anteenooyinka log-periodic-ka waxay awood u siinayaan inay daboolaan xargaha soo noqnoqda ee badan, yaraynta baahida beddelka soo noqnoqda iyo beddelka anteenada, iyo hagaajinta dabacsanaanta nidaamka iyo hufnaanta.

Mabda'a shaqada ee anteenada log-periodic waxay ku saleysan tahay qaab-dhismeedkeeda gaarka ah. Waxay ka kooban tahay taxane ah taariko bir ah oo beddelan, mid walbana wuu kordhayaa dhererka iyo fogaanta iyadoo loo eegayo xilliga logarithmic. Qaab dhismeedkani wuxuu keenaa in anteenadu ay soo saarto kala duwanaanshiyaha wejiga ee soo noqnoqoshada kala duwan, si ay u gaadho shucaac ballaadhan.

Marka ay tignoolajiyadu horumarto, qaabaynta iyo hababka wax-soo-saarka anteenooyinka-Log-periodic ayaa horumaray. Anteenooyinka casriga ah ee casriga ah waxay isticmaalaan agabyo horumarsan iyo hababka wax soo saarka si ay u horumariyaan waxqabadka anteenada iyo isku halaynta.

Mabda'eeda shaqo ayaa si kooban loogu sifayn karaa sidan soo socota

1. Mabda'a resonance: Naqshadeynta anteenada log-periodic waxay ku saleysan tahay mabda'a dhawaaqa. Inta jeer ee gaarka ah, qaab dhismeedka anteenadu waxay sameyn doontaa loop resonant, taasoo u oggolaanaysa anteenadu inay si wax ku ool ah u hesho oo u iftiimiso hirarka korantada. Adigoo si sax ah u naqshadeynaya dhererka iyo kala dheereynta xaashiyaha birta ah, anteenooyinka-xilliyeedka waxay ku shaqeyn karaan noocyo badan oo soo noqnoqda.

2. Farqiga wejiga: Saamiga log-periodic ee dhererka gabalka birta iyo kala dheeraynta anteenada log-periodic waxay sababtaa bir kasta inay soo saarto farqi weji oo isdaba joog ah. Farqiga wejigani wuxuu keenayaa hab-dhaqanka anteenada ee soo noqnoqoshada kala duwan, taas oo awood u siinaysa hawlgal ballaadhan. Qaybaha birta ah ee gaagaaban waxay u dhaqmaan si isdaba joog ah, halka qaybo dhaadheer oo bir ah ay u dhaqmaan si isdaba joog hoose ah.

3. Sawirka Beam: Qaab dhismeedka anteenada log-periodic waxay ka dhigaysaa inay yeelato astaamo shucaac oo kala duwan oo isdaba joog ah. Sida soo noqnoqoshada isbedbedesho, jihada shucaaca iyo ballaca laydhka anteenada ayaa sidoo kale isbeddela. Tani waxay ka dhigan tahay in anteenooyinka log-periodic-ka ah ay iskaan karaan oo ay hagaajin karaan alwaaxyada inta jeer ee ballaaran.

Faa'iidooyinka anteenooyinka log-periodic

1. Tilmaamaha Broadband: Anteenada Log-periodic waa anteeno ballaadhan oo dabooli kara xargaha soo noqnoqda ee badan. Qaab-dhismeedkeeda xilli-Log-xilliyeedka ah waxa uu u sahlayaa anteenada in ay yeelato astaamo shucaac la mid ah oo dhan inta jeer ee soo noqnoqda, taas oo meesha ka saaraysa baahida loo qabo beddelka soo noqnoqda ama beddelka anteenada, hagaajinta dabacsanaanta nidaamka iyo hufnaanta.

2. Faa'iidada sare iyo waxtarka shucaaca: Anteenooyinka Log-periodic sida caadiga ah waxay leeyihiin faa'iido sare iyo waxtarka shucaaca. Qaabdhismeedkeedu waxa uu u ogolaanayaa resonance ee kala duwan oo soo noqnoqda, bixinta shucaac xooggan iyo awoodaha soo dhaweynta.

3. Xakamaynta jihaynta: Anteenooyinka Log-periodic badiyaa waa kuwo jihaysan, yacni, waxay leeyihiin shucaac xoog badan ama awoodo soo dhawayneed jihooyin gaar ah. Tani waxay ka dhigaysaa anteenooyinkooda log-periodic ku habboon codsiyada u baahan jihaynta shucaaca gaarka ah, sida isgaarsiinta, radar, iwm.

4. Fududeynta naqshadeynta nidaamka: Maadaama anteenooyinka log-periodic ay dabooli karaan kala duwanaansho badan oo soo noqnoqda, naqshadeynta nidaamka waa la fududeyn karaa tirada anteenooyinka waa la dhimi karaa. Tani waxay kaa caawinaysaa dhimista kharashka nidaamka, yaraynta kakanaanta iyo hagaajinta isku halaynta.

5. Waxqabadka ka-hortagga faragelinta: Anteenada Log-periodic waxay leedahay wax-qabad wanaagsan oo ka-hortagga faragelinta ee band soo noqnoqda ballaaran. Qaab dhismeedkeedu waxa uu u sahlayaa anteenada in ay si fiican u shaandhayso calaamadaha soo noqnoqda ee aan loo baahnayn oo ay hagaajiso iska caabinta nidaamka ee faragelinta.

Marka la soo koobo, iyada oo si sax ah loo naqshadeynayo dhererka iyo kala dheereynta xaashida birta ah, anteenada log-periodic waxay ku shaqeyn kartaa dhowr jeer oo soo noqnoqonaya, oo leh astaamo ballaadhan, faa'iido sare iyo waxtarka shucaaca, xakamaynta jihaynta, naqshadaynta nidaamka fudud iyo ka-hortagga faragelinta . faa'iidooyinka waxqabadka. Tani waxay ka dhigaysaa anteenooyinkooda logarithmic xilliyeedka si ballaaran loogu isticmaalo isgaarsiinta wireless-ka, radar, cilmi-baarista sayniska iyo qaybaha kale.