Ni ibihe bipimo bigomba gusuzumwa cyane cyane mugihe cyo gutoranya akayunguruzo ka RF?

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

1.Umurongo wa Centre: f0 ni ngufi kumurongo wo hagati wumurongo wa pass ya bande ya RF, ubusanzwe ifatwa nka f0 = (fL + fH) / 2, na fL na fH nibintu byinshyi kuruhande rwa 1dB cyangwa 3dB manuka uhereye ibumoso n'iburyo bwa bande-pass cyangwa bande-ihagarika. Umuyoboro wa bande ya bande ya bande ya filteri isanzwe ibarwa mugutwara igihombo ntarengwa cyo kwinjiza nkumwanya wo hagati.

RF passive components from Jingxin

2 ya 1dB cyangwa 3dB amanota yo gutakaza. Ibyerekeranye no gutakaza ugereranije nibi bikurikira: kubitambutse bito byungurura, igihombo cyo gushiramo gishingiye kuri DC, naho kuri pass pass yo hejuru, igihombo cyo gushiramo gishingiye kumurongo mwinshi-mwinshi utarinze guhagarara.

3. BWxdB: Yerekeza ku bugari bwagutse kugirango yambuke, BWxdB = (fH-FL). fH na fL nibisobanuro bihuye ibumoso niburyo bwiburyo kuri X (dB) byamanutse hashingiwe ku gihombo cyo kwinjiza kuri centre ya f0. X = 3, 1, 0.5, aribyo BW3dB, BW1dB, BW0.5dB, mubisanzwe bikoreshwa mukuranga pass-band umurongo mugari wa filteri. Umuyoboro ucagaguye = BW3dB / f0 × 100%, nawo ukunze gukoreshwa mu kuranga pass-band umurongo wa filteri.

4. Gutakaza Kwinjiza: Bitewe na filteri ya RF, ibimenyetso byumwimerere mumuzunguruko byiyongera, igihombo cyacyo kirangwa hagati cyangwa inshuro nyinshi. Niba ibisabwa byo gutakaza umurongo wuzuye bigomba gushimangirwa.

5. Ripple: Yerekeza kuri pe-to-peak yo guhindagura igihombo hamwe ninshuro zishingiye kumurongo wo gutakaza igihombo kiri hagati yumurongo wa 1dB cyangwa 3dB (guca inshuro).

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

7. 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 idahuye. Kuri filteri ya RF nyayo, umurongo wuzuza VSWR <1.5: 1 mubisanzwe ntabwo uri munsi ya BW3dB, kandi igipimo cyayo kuri BW3dB kijyanye no kuyungurura no gutakaza kwinjiza.

8. Gutakaza Igihombo: Bivuga igipimo cya décibel (dB) yingufu zinjiza nimbaraga zo kwerekana icyerekezo cyicyapa, nacyo kikaba kingana na | 20Log10ρ |, coefficient ya ρis voltage. Igihombo cyo kugaruka ntigira iherezo mugihe imbaraga zinjiza zinjijwe nicyambu.

9. Guhagarika kwangwa: indangagaciro yingenzi yo gupima imikorere yo gutoranya rf muyunguruzi. Urwego rwohejuru ni rwo, ni byiza guhagarika ibimenyetso bitandukanya umurongo. 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 - coefficente y'urukiramende (KxdB> 1), KxdB = BWxdB / BW3dB, (X irashobora kuba 40dB, 30dB, 20dB , n'ibindi). Nibindi byateganijwe muyungurura bifite, niko urukiramende arirwo - ni ukuvuga, uko K yegereye agaciro keza ka 1, biragoye gukora.

Birumvikana, usibye ibintu byavuzwe haruguru, urashobora gutekereza kubijyanye nimbaraga zayo zikora, 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.


Igihe cyo kohereza: Ukwakira-08-2021