Ni ibihe bintu bigomba gusuzumwa cyane cyane mugihe cyo gutoranya RF?

Mugihe cyo gutegura igisubizo cya RF, filteri ya RF igira uruhare runini muri sisitemu. Niba uhitamo RF muyunguruzi, ibipimo bikurikira bigomba gusuzumwa.

1. Umuyoboro wa Centre: f0 ni ngufi kuri centre yumurongo wa passband ya RF ya filteri, ifatwa muri rusange nka f0 = (fL + fH) / 2, na fL na fH nibice byinshyi kuruhande rwa 1dB cyangwa 3dB igitonyanga uhereye ibumoso n'iburyo bwa bande-pass cyangwa bande-ihagarika muyunguruzi. Umuyoboro wa bande ya bande ya bande ya filteri isanzwe ibarwa mugutwara igihombo ntarengwa cyo kwinjiza nkumwanya wo hagati.

2. Frequency Frequency: Kubijyanye na pass-pass ya filteri, yerekeza kumurongo wiburyo wa passband, naho kuri pass-yo hejuru-iyungurura, yerekeza kumwanya wibumoso wa passband, ubusanzwe bisobanurwa mubijyanye na 1dB cyangwa 3dB amanota yo gutakaza. Ibivugwa kubihombo ugereranije nibi bikurikira: kubitambutse bito byungurura, igihombo cyo kwinjiza gishingiye kuri DC, naho kuri pass pass yo hejuru, igihombo cyo gushiramo gishingiye kumurongo mwinshi cyane-utambutse utarinze guhagarara.

3. BWxdB: Yerekeza ku bugari bwa spekure igomba kwambuka, BWxdB = (fH-FL). fH na fL nibintu bihuye ibumoso niburyo bwiburyo kuri X (dB) byamanutse hashingiwe kubihombo byinjizwa kuri centre ya f0. X = 3, 1, 0.5, aribyo BW3dB, BW1dB, BW0.5dB, mubisanzwe bikoreshwa mukuranga pass-band bandwidth ibipimo bya filteri. Umuyoboro ucagaguye = BW3dB / f0 × 100%, nawo ukunze gukoreshwa mu kuranga pass-band umurongo wa filteri.

 

1. Gutakaza Kwinjiza: Bitewe na filteri ya RF, ikimenyetso cyumwimerere mumuzunguruko cyegeranye, igihombo cyacyo kirangwa hagati cyangwa inshuro zo guhagarika. Niba ibisabwa gutakaza igihombo cyuzuye bigomba gushimangirwa.

 

1. Ripple: Yerekeza ku mpinga-yo-mpanvu yo guhindagura igihombo hamwe ninshuro zishingiye ku kigereranyo cyo gutakaza igihombo kiri hagati yumurongo wa 1dB cyangwa 3dB (guca inshuro).

 

 

1. Passband Riplpe: Bivuga ihinduka ryigihombo cyo kwinjiza muri pass-band inshuro. Ihindagurika rya pass-band muri 1dB umurongo wa 1dB.

 

1. VSWR: Nikimenyetso cyingenzi cyo gupima niba ikimenyetso muri pass-band ya filteri ihuye neza kandi yoherejwe. VSWR = 1: 1 ni ihuriro ryiza, VSWR> 1 ni iyo kudahuza. Kuri filteri ya RF ifatika, umurongo wuzuza VSWR <1.5: 1 muri rusange uri munsi ya BW3dB, kandi igipimo cyayo kuri BW3dB kijyanye no kuyungurura no gutakaza kwinjiza.
2. Gutakaza Igihombo: Bivuga igipimo cya decibels (dB) yingufu zinjiza nimbaraga zo kwerekana icyambu cya signal, nayo ihwanye na | 20Log10ρ |, ρis voltage coefficient coefficient. Igihombo cyo kugaruka ni ntarengwa iyo imbaraga zinjiza zinjijwe nicyambu.
3. Guhagarika kwangwa: indangagaciro yingenzi yo gupima imikorere yo guhitamo ya filteri ya RF. Urwego rwohejuru ni rwo, ni byiza guhagarika ibimenyetso byo hanze bitandukanya ibimenyetso. Mubisanzwe hariho ibice bibiri: kimwe nukubaza umubare wa dB fs ihagarikwa kumurongo watanzwe hanze, kandi uburyo bwo kubara ni attenuation as-il kuri FS; Ibindi ni ugutanga icyerekezo cyo kuranga urwego rwegeranye hagati ya amplitude-frequency reaction ya filteri hamwe nurukiramende rwiza - coefficient y'urukiramende (KxdB> 1), KxdB = BWxdB / BW3dB, (X irashobora kuba 40dB, 30dB, 20dB, nibindi). Nibindi byateganijwe muyunguruzi bifite, niko urukiramende arirwo - ni ukuvuga, uko K yegereye agaciro keza ka 1, biragoye gukora.

 

Birumvikana, usibye ibintu byavuzwe haruguru, urashobora gusuzuma imbaraga zakazi, gupima kubisabwa, cyangwa kubikoresha murugo cyangwa hanze, kimwe nabahuza. Ariko, ibipimo byavuzwe haruguru nibyingenzi kugirango uhitemo imikorere yabyo.

Nkuwashizeho akayunguruzo ka RF, Jingxin irashobora kugufasha kubibazo bya filteri ya RF, kandi ugahitamo pasitoro ya pasiporo ukurikije igisubizo cyawe. Ibisobanuro birambuye murashobora kutugisha inama.