Nibihe bintu bigomba gusuzumwa cyane cyane mugihe cyo gutoranya RF?

Mugushushanya igisubizo cya RF, filteri ya RF igira uruhare runini muri sisitemu.Niba uhitamo akayunguruzo ka RF, hagomba gusuzumwa ibipimo bikurikira.

1. Inshuro ya Centre: f0 ni ngufi kuri centre yumurongo wa passband ya RF filteri, mubisanzwe ifatwa nka f0 = (fL + fH) / 2, na fL na fH nibice byinshyi byerekeranye na 1dB cyangwa 3dB uhereye ibumoso n'iburyo bwa bande-pass cyangwa bande-ihagarika.Umuyoboro wa bande ya bande ya bande ya filteri isanzwe ubarwa mugutwara igihombo gito cyo kwinjiza nkumwanya wo hagati.

RF passive components from Jingxin

2. Umuyoboro wa Cutoff: Kuri filteri yo hasi-yungurura, yerekeza kumurongo wiburyo wiburyo bwa passband, naho kuri pass-yo hejuru ya filteri, yerekeza kumwanya wibumoso wa passband, ubusanzwe bisobanurwa muburyo bwa 1dB cyangwa amanota ya 3dB ugereranije.Ibyerekeranye no gutakaza igihombo ni nkibi bikurikira: kubitambutse buke, gushiramo igihombo gishingiye kuri DC, naho kuri filteri yo hejuru, igihombo cyo kwinjiza gishingiye kumurongo mwinshi wo hejuru utarinze guhagarara.

3. BWxdB: Yerekeza ku bugari bwa spécran kugirango yambuke, BWxdB = (fH-FL).fH na fL nibisobanuro bihuye ibumoso niburyo bwiburyo kuri X (dB) byamanutse hashingiwe ku gihombo cyo kwinjiza hagati ya f0.X = 3, 1, 0.5, aribyo BW3dB, BW1dB, BW0.5dB, mubisanzwe bikoreshwa mukuranga pass-band bandwidth ibipimo bya filteri.Umuyoboro mugari = BW3dB / f0 × 100%, nayo ikoreshwa muburyo bwo kuranga umurongo wa bande ya filteri.

 

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

 

  1. Ripple: Yerekeza kuri peak-to-peak yo guhindagura igihombo hamwe ninshuro zishingiye ku kigereranyo cyo gutakaza umurongo uri hagati ya 1dB cyangwa umurongo wa 3dB (guca inshuro).

 

 

  1. Riplpe ya Passband: Yerekeza ku mpinduka zo guta muri pass-band inshuro.Ihindagurika rya pass-band muri 1dB umurongo wa 1dB.

 

  1. VSWR: Ni ikimenyetso cyingenzi cyo gupima niba ibimenyetso muri pass-band ya filteri bihuye neza kandi byoherejwe.VSWR = 1: 1 ni ihuriro ryiza, VSWR> 1 ni idahuye.Kuri filteri ya RF nyayo, umurongo wuzuza VSWR <1.5: 1 mubusanzwe uri munsi ya BW3dB, kandi igipimo cyayo kuri BW3dB kijyanye no kuyungurura no gutakaza kwinjiza.
  2. Gutakaza igihombo: Yerekeza ku kigereranyo cya decibels (dB) yingufu zinjiza nimbaraga zo kwerekana icyambu cya signal, nayo ihwanye na | 20Log10ρ |, ρis voltage coefficient coefficient.Igihombo cyo kugaruka ntigira iherezo iyo ibyinjijwe byinjijwe nicyambu.
  3. Guhagarika kwangwa: indangagaciro yingenzi yo gupima imikorere yo gutoranya RF.Urwego rwohejuru ni indangagaciro, nibyiza guhagarika ibimenyetso bitagaragara.Mubisanzwe hariho formulaire ebyiri: imwe ni ukubaza 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 rwegereye hagati ya amplitude-frequency reaction ya filteri hamwe nurukiramende rwiza - coefficente y'urukiramende (KxdB> 1), KxdB = BWxdB / BW3dB, (X irashobora kuba 40dB, 30dB, 20dB, nibindi).Kurenza uko 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 guhitamo imikorere yayo.

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


Igihe cyo kohereza: Ukwakira-08-2021