A na-eji antenna Yagi, dị ka eriri ntụzi aka kpochapụwo, na band HF, VHF na UHF.Yagi bụ antenna ngwụcha nke nwere oscillator na-arụ ọrụ (na-abụkarị oscillator apịaji), onye na-atụgharị uche na ọtụtụ ntuziaka na-agafe agafe ahaziri n'otu n'otu.
Enwere ọtụtụ ihe na-emetụta arụmọrụ nke antenna Yagi, na ngbanwe nke antenna Yagi dị mgbagwoju anya karịa antenna ndị ọzọ.A na-edozi oke abụọ nke antenna: ugboro ole na-agbapụta na oke ebili mmiri guzoro ọtọ.Nke ahụ bụ, a na-edozi ugboro ugboro nke antenna gburugburu 435MHz, na oke ebili mmiri nke antenna dị nso 1 dị ka o kwere mee.
Tọọ antenna ihe dịka 1.5m site na ala, jikọọ mita ebili mmiri guzoro wee malite nha.Iji belata njehie nha, eriri na-ejikọta antenna na mita ebili mmiri na redio na mita ebili mmiri na-eguzo kwesịrị ịdị mkpụmkpụ dịka enwere ike.Enwere ike ịhazi ebe atọ: ikike nke trimmer capacitor, ọnọdụ nke obere sekit mmanya na ogologo oscillator na-arụ ọrụ.Usoro mmezi a kapịrị ọnụ bụ ndị a:
(1) Idozi obere sekit mmanya 5 ~ 6cm pụọ na mmanya obe;
(2) A na-edozi ugboro nke nnyefe na 435MHz, a na-edozikwa capacitor nke seramiiki iji belata ebili mmiri nke antenna;
(3) Tulee ebili mmiri nke antenna site na 430 ~ 440MHz, 2MHz ọ bụla, wee mee eserese ma ọ bụ ndepụta nke data atụnyere.
(4) Chọpụta ma ugboro dabara na opekempe ebili mmiri na-eguzo (ụka resonance antenna) dị gburugburu 435MHz.Ọ bụrụ na ugboro ole dị elu ma ọ bụ dị ala, enwere ike tụọ ebili mmiri guzoro ọzọ site na dochie oscillator na-arụ ọrụ na milimita ole na ole ogologo ma ọ bụ mkpụmkpụ;
(5) Gbanwee ntakịrị ọnọdụ nke mkpanaka mkpirisi okirikiri, ma na-emezigharị capacitor nke mgbawa seramiiki ugboro ugboro iji mee ka antenna guzoro obere ka o kwere mee gburugburu 435MHz.
Mgbe a na-edozi antenna ahụ, gbanwee otu ebe n'otu oge, ka ọ dị mfe ịchọta iwu mgbanwe.N'ihi nnukwu ọrụ ugboro ugboro, njupụta nke mmezi adịghị oke.Dịka ọmụmaatụ, ikike edoziziri nke ezigbo ngbanwe capacitor ejikọrọ n'usoro na ogwe γ bụ ihe dịka 3 ~ 4pF, na mgbanwe nke ụzọ iri n'ụzọ iri nke usoro PI (pF) ga-eme ka mgbanwe dị ukwuu na ebili mmiri guzo ọtọ.Tụkwasị na nke ahụ, ọtụtụ ihe ndị dị ka ogologo ogologo mmanya na ọnọdụ nke eriri ahụ ga-enwekwa mmetụta ụfọdụ na nha nke ebili mmiri na-eguzo, nke kwesịrị ịṅa ntị na nhazi nhazi.
Oge nzipu: Nov-30-2022
