Antenna TV: guudmar

Currently, guriga kasta leeyahay hal ama in ka badan telefishanka. Waayo, ururka of signalada telefishan baahinta u baahan tahay antenna ah. Waxaa jira noocyo badan oo qaata qalabka. Waxay kala qaybsan yihiin sida uu yahay qasdiga, nooca ka mid ah calaamadaha helay, qaabka, size iyo wixii la mid ah. Mawduuca ku saabsan maanta our dood u adeegi doonaa sida helo anteenooyinkooda television.

Mid kasta oo inaga mid ah nolosheena in qaab ama mid kale wajahay qalabka. antenna TV waa qaab-dhismeedka bir ah, sida caadiga ah laga sameeyey aluminium, waayo helo signal raadiyaha. Iyada oo ku xidhan nooca kala duwan ee TV-ga helay, waxay u qaybsan yihiin ee mitir iyo qalab decimetre. Qaybtooda site rakibo on qolka iyo isticmaalka bannaanka u. By dhaqmaadka hab ka mid ah TV-antenna signal laga yaabaa firfircoon ama dadban.

Ka fikir noocyada ugu muhiimsan ee qaata:

1. Dipole ama gariiriye kala jabeen. Waxay yihiin quarter-ruxruxo, nus-la ruxruxo iyo la ruxruxo. Arintaan u dhiganta dhererka gariiriye ee Milanello of signal ah in la helo; qeybtii ruxruxo - nus ka mid ah signalka, iyo, siday u kala horreeyaan, ee quarter - quarter. Y Dipole impedance caan ku yahay 300 ohms, si ay u hagaajiyaan la cable antenna TV a aqbalana ee xaaladaha hiwaayadda inta badan isticmaalaan loop u dhigma nus-la ruxruxo. Maxaa yeelay, dhammaan Anteenooyinka cable television hoos u dhac waa impedance sifo 75 ohms. Dipole, dhab ahaantii, waa antenna qolka analog ah.

2. TV-anteeno "channel ruxruxo" nooca uu noqon karaa: laba-piece, saddex-piece, sanno, semielementnoy, odinnadtsatielementnoy iyo shestnadtsatielementnoy. Dipole duubnaadaan oo keli ah looma isticmaalo, waa element firfircoon ee noocan ah anteenooyinkooda. Anteeno "channel ruxruxo" ka kooban yahay element firfircoon (gariiriye loop ugu), iyo xubno ka dadban, iftiinta iyo agaasimayaasha dhajinta on gacanta caadi ah. Agaasimaha - Dipole a dadban, oo ku yaalla hore ee element kacsan. Iftiinta - gariiriye ku yaal dambeeya firfircoon. In noocan ah anteenooyinkooda, waxaa jira hal qasaaro dheeriga ah ee xubno dadban in gariiriye la ruxruxo hoos impedance aqbasho of antenna ah. Qaateyaasha noocan ah waa wax caadi ah in qalabka raadaarka iyo isgaarsiinta raadiyaha.

3. A television antenna log-wareegsan waa qalab broadband ah, bixinta calaamadaha soo dhaweynta ah ee kala duwan oo soo noq (hirarka UHF iyo meter). kala duwan oo shaqo ah ee u dhigma ah loo isitcmaalo oo ka mid ah antenna oo mara, kuna waari dhexdeeda faa'iidada ay weli joogto ah.

4. Qaab-dhismeedka antenna television loogu talagalay si ay u helaan signalada in kiisaska antenna ah "Yagi" awoodin in ay bixiyaan tayada signal lagu qanci karo. Ma double ama saddex laabmaan square ah. Qalabka noocan ah isku daraa faa'iido sare oo daacad ah design, uma baahna sixitaanka.

5. wajiga in-The shabaggeedii waa nidaam adag oo jiho ka kooban anteenooyinkooda omnidirectional kuwaas oo kala maqan meesha bannaan, waxay qorsheeyey si markaa wajiga of calaamadaha waa loo siman yahay oo dhan. Sida caadiga ah, waxay soo ururay oo ka anteenooyinkooda isku amro in hannaanka a of saf oo ku xiran qaybta elektarooniga ah. qaateyaasha Common-hab waa antenna TV la kordhiyo ka.

Gebogebadii, waxaannu nidhaahnaa, in doorashada antenna waa in si gaar ah loo soo dhawaaday, taas oo ku xidhan xaaladaha juquraafi degaanka on site rakibo iyo natiijada la doonayo.