Momwe Mungamangire DIY 2 Meter J-pole Antenna

diy-j-pole-mlongoti

 

Ngati mukuyang'ana mlongoti wotsika mtengo, komanso wosavuta kumanga, mlongoti wa J-pole ndi wabwino kwambiri! Pafupifupi nthawi ya maola, komanso zinthu zamtengo wapatali pafupifupi $15, mutha kukhala ndi mlongoti wa j-pole wochita modabwitsa.

 

Mlongoti wa j-pole nthawi zambiri ndi gawo laling'ono lomwe limagwiritsa ntchito 1/4 wave shorted stub yofananira ngati chosinthira kukana. Mlongoti wa j-pole upereka ndalama zochepa kuposa 3 DB zopindula mozungulira.

 

Chomwe ndidasankha kuti ndipange mlongoti wa j-pole chinali chitoliro chamkuwa cha inchi 3/4 chomwe chimagwiritsidwa ntchito popanga mipope. Nawa mapulani opangira mlongoti wa J-pole wa 2 mita:

 

kupanga-kupanga-2-mita-J-pole-mlongoti

 

Miyezo yomwe ili pamwambapa ya J-pole imakhalabe mainchesi. Miyezo yautali wonse, komanso kutalika kwa stub kumachokera pakati pa chitoliro chogawanika (chopingasa) mpaka pamwamba pa mlongoti. Ulalo woyezera ndi mainchesi 2 1/4 kuchokera pamwamba pa otenga nawo mbali yopingasa mpaka pomwe pali ulalo. Kusiyanasiyana pakati pa chigawo chachikulu cha j-pole centerline komanso tuning stub centerline ndi 2 ″. Ndinadula kukula kwa RG-8X foam coax mpaka kutalika kwa 67 ″ kwa feedline, ndikuzungulira matembenuzidwe 4 (ang'ono momwe mungathere) zomwe zalembedwa pansipa gawo lolunjika la gawo lofananira. Izi zidzathetsanso mzere wa chakudya kuchokera ku mlongoti wa j-pole, komanso chithandizo chopereka chitetezo champhezi. Lumikizani kondakitala wapakati wa coax ku gawo loyambirira, ndi mlonda ku nsonga ya j-pole.

 

M'miyeso yonse yomwe ili pamwambapa, akuyenera kuganiziridwa poyambira pomanga j-pole. Ndikumangirira kwakanthawi coax pogwiritsa ntchito zikhomo za 1 inch hose, komanso kukonzanso kulumikizana kwa coax ku SWR yotsika kwambiri. Kuchokera pamenepo, ndimasintha kutalika kwa gawo lalikulu la J-pole. Pambuyo pake ndikuyambanso ndikusintha ulalo wa coax.

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