TV antenna: isishwankathelo

Okwangoku, ikhaya ngasinye shini omnye okanye ngaphezulu. Lokuququzelela isiginali kamabonakude yosasazo kufuneka i-eriyali. Kukho iintlobo ezininzi nokufumana izixhobo. Zahlula ngokwengqibo, uhlobo iziganeko ezifunyenweyo, imilo, ubukhulu njalo njalo. Isifundo kwengxoxo namhlanje uya kuba kufumana antenna kumabonwakude.

Ngamnye wethu ebomini bethu ngendlela enye okanye enye bejamelene nezi zixhobo. I-eriyali TV yi isakhiwo otyhidiweyo, yenziwe-aluminiyam, ngokufumana uphawu kunomathotholo. Ngokuxhomekeka kuhlobo kuluhlu umabonwakude bayanamkela, azizahlulo imitha kunye decimetre isixhobo. isabelo sabo site ufakelo gumbi kunye nokusetyenziswa yangaphandle. Ngokwamkela indlela kamabonakude uphawu eriyali inokuba esebenzayo okanye kwisixando sokwenziwa.

Cinga iintlobo eziphambili balwamkele:

1. Dipole okanye vibrator zahlulwe. Yokuba kota-ngumtshangatshangiso, isiqingatha-yomtshangatshangiso otshangatshangisiweyo. Le yokugqibela elivumelana ubude vibrator ngamaza umqondiso ukuba sifunyenwe; ngexesha lekhefu wave - isiqingatha umqondiso; kunye, ngokulandelelana, xa ikota - ngekota. Y dipole ukuvimba uphawu na ohms 300, ukuze zivumelane intambo TV eriyali kunye ngumamkeli kwiimeko engahlawulwayo badla ukusebenzisa enesiqingatha-wave efana loop. Ngokuba bonke-eriyali intambo kamabonakude kucutheka ukuvimba uphawu -75 ohms. Dipole, enyanisweni, i-eriyali igumbi analog.

2. TV-eriyali udidi "wave channel" ingaba: iqhekeza-mbini, livela ezithathu-, siqinisekiso, semielementnoy, odinnadtsatielementnoy kunye shestnadtsatielementnoy. Siphindwe dipole kuphela ayisetyenziswa, yinto into esebenzayo yale hlobo eriyali. Uthi "wave channel" ibandakanya element esebenzayo (vibrator ezininzi ngokwenzekayo), kunye nezinto zezenzi, kugqame kunye nabalawuli ekhwele phezu ingalo eqhelekileyo. UMlawuli - a dipole nje, ibekwe phambi element eqhutywa. Kugqame - a vibrator esemva esebenzayo. Kule hlobo eriyali, kukho indlala kunye kongezwe lweziqalelo wesixando ukuya vibrator ngumtshangatshangiso kunciphisa igalelo ukuvimba kwe-eriyali. Bathunyelwa olu hlobo eziqhelekileyo radar kunye nonxibelelwano radio nezixhobo.

3. A eriyali kamabonakude log-ngamaxesha sisixhobo broadband, ngokubonelela amaza ulwamkelo kwi kuluhlu frequency (amaza UHF kunye imitha). Le yokusebenza Uludwe i matching ngokupheleleyo-eriyali kunye feeder, apho inzuzo ihlala rhoqo.

4. Framework eriyali umabonwakude eyenzelwe ukufumana imiyalezo kwiimeko apho eriyali "Yagi" ayikwazi ukuba kukubonelela umgangatho uphawu ngokwanelisayo. Kabini okanye kathathu isikwere. Devices yale hlobo idibanisa inzuzo ephakamileyo benolungelelwano loyilo, musa ukuba ukulungiswa.

5. Isigaba ku-lwaso yinkqubo entsonkothileyo zemiyalelo eziquka eriyali omnidirectional ezahlulwa emajukujukwini, zicwangciswe bebesenjenjalo ukuba isigaba kwezi iimpawu bonke bayalingana. Ngokuqhelekileyo, ukuba ndawonye ukusuka eriyali ezifanayo ilahlwe kwindawo ezininzi ngemiqolo eqhagamshelwe unit ngekhompyutha. balwamkele Eziqhelekileyo-imowudi ezi eriyali TV kunye lo mshini.

Xa ndiqukumbela, sithi ukuya ukhetho eriyali kufuneka wasondela ngamnye, ngokuxhomekeke kwiimeko geographical zendawo kwisiza wokumiselwa isiphumo elifunekayo.