Hatariho akayunguruzo imbere ya RF imbere, ingaruka zo kwakira zizagabanuka cyane. Kugabanuka ni bangahe? Muri rusange, hamwe na antene nziza, intera izaba byibuze inshuro 2 mbi. Na none, hejuru ya antenne, niko kwakirwa nabi! Kuki? Kuberako ikirere cyumunsi cyuzuyemo ibimenyetso byinshi, ibyo bimenyetso birabuza imbere kwakira imiyoboro. Ko imbere-iherezo ryungurura ari ngombwa, nigute wakora imbere-iherezo ryungurura? Rf inganda umuyobozi mukuru kugirango akwigishe! Ariko, imbere-ya filteri ya bande ya 435MHz ntabwo byoroshye kongeramo. Reka dutangire gusesengura
Nibice bya Chebyshev band-pass muyunguruzi hamwe na capacitor yo hejuru ihuza hamwe na centre ya 435MHz. Bitewe no gukoresha ibicuruzwa biboneka mubucuruzi (bifite Q agaciro kangana na 70), igihombo cyo kwinjiza ni kinini cyane, kigera kuri -11db, naho ubundi umurongo niwo ugaragaza (ushobora guhinduka mumiraba ihagaze). Kubwibyo, ibyiyumvo byabakiriye bigira ingaruka cyane, kuberako ibyiyumvo byabakiriye bifitanye isano itaziguye nigishusho cyurusaku rwicyiciro cya mbere cyo kwongera cyane, kabone niyo ikoranabuhanga ari ryiza, nkurusaku rw urusaku rwinshi rushobora kugenzurwa kugeza 0.5, ariko gucomeka gutakaza imbere yungurura imbere bizarushaho kwangiza urusaku kuri 11db. Ntibisanzwe rero kubona imwe ikoreshwa nkiyi. Ongera urebe kuri iyi shusho:
Komeza ibindi bipimo, inductor isimburwa na coil nziza yuzuye, nubwo ingano ari nini, ariko igihombo cyo gushiramo kiba nka -5, kikaba gikoreshwa cyane, ariko biracyakomeye cyane gukora. Kuberako: Ubushobozi bwo guhuza hejuru ni 0.2P gusa, kandi ubushobozi bwubu bushobozi ntabwo bworoshye kugura, kuburyo ushobora gushushanya capacitor gusa kuri PCB, bizana ingorane kubitsinzi 1. Ndetse inductor ya 12nH ntabwo ari nziza cyane kumuyaga, kandi igomba kuba idafite aho ihuriye, kandi ntabwo ari byiza kumenya niba hari uburambe budahagije. Inductance iracyari nini cyane, ibipimo byizo capacator birumva cyane, kandi impinduka nke zizagira ingaruka kumikorere. Noneho bigenda bite niba ushobora gukomeza kongera Q agaciro ka inductor, kandi hari uburyo bwo gukomeza kugabanya ubushobozi bwo guhuza? Noneho gabanya umurongo wa buke. Ibintu byaba bimeze gutya:
Inductance Q agaciro kiyi shusho ihinduka gitunguranye 1600, kandi inductance nayo iba nini, igishushanyo kiba cyiza cyane, iyi filteri irashobora kwemeza guhitamo no kwiyumvisha ibyakiriwe nibindi bipimo, niba nta gutekereza ku gukoresha ingufu mu buryo butaziguye muri inyuma yigice cya IC, gitunguranye ukure intera hejuru. Imikorere myiza, ariko ubunini ni bunini cyane microstrip muyunguruzi
Igishushanyo mbonera cya spiral yogushushanya Kuri iyi filteri ya spiral, abantu bake kandi bake bazashushanya mubushinwa, kandi software irashobora guhuzwa neza. Ubwa mbere, ifoto ibanza itangiza akayunguruzo nyako kubikoresho bigendanwa 435MHz. Mubyukuri, gushungura neza bigomba kuba byateguwe neza, tuzashushanya ubuziranenge bwa 2-cavity na 4-cavity muyunguruzi kuriyi mashini yo gupima.
Igihe cyoherejwe: Nyakanga-17-2024