Nibihe bintu bigomba gusuzumwa cyane cyane mugihe cyo gutoranya RF?

Mugihe cyo gushushanya igisubizo cya RF, filteri ya RF ikina uruhare rukomeye muri sisitemu.Niba guhitamo RF muyunguruzi, ibipimo bikurikira bigomba gusuzumwa.

1.Umuyoboro wa Centre: f0 ni ngufi kuri centre yinshyi yumurongo wa pass ya bande ya RF, ubusanzwe ifatwa nka f0 = (fL + fH) / 2, na fL na fH nibintu byerekeranye numwanya wa 1dB cyangwa 3dB manuka uhereye ibumoso n'iburyo bwa bande-pass cyangwa bande-ihagarika muyunguruzi.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 ya 1dB cyangwa 3dB amanota ugereranije.Ibyerekeranye no gutakaza igihombo ni nkibi bikurikira: kubitambutse bike, gushiramo igihombo gishingiye kuri DC, naho kuri filteri yo hejuru, igihombo cyo gushiramo 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.

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

5. 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).

6. Passband Riplpe: Bivuga impinduka zo gutakaza kwinjiza muri pass-band inshuro.Ihindagurika rya pass-band muri 1dB umurongo wa 1dB.

7. VSWR: Nikimenyetso 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.

8. Gutakaza Igihombo: Yerekeza ku kigereranyo cya decibels (dB) yimbaraga zinjiza nimbaraga zo kwerekana icyambu cya signal, nayo ihwanye na | 20Log10ρ |, ρis voltage coefficient coefficient.Igihombo cyo kugaruka ntigira iherezo iyo ibyinjijwe byinjijwe nicyambu.

9. Guhagarika kwangwa: indangagaciro yingenzi yo gupima imikorere yo gutoranya rf.Urwego rwohejuru ni indangagaciro, nibyiza guhagarika ibimenyetso bitagaragara.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).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 gutekereza kubijyanye nimbaraga zayo zikora, 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, kandi ugahitamo pasitoro ukurikije igisubizo cyawe.Ibisobanuro birambuye murashobora kutugisha inama.


Igihe cyo kohereza: Ukwakira-08-2021