Kedu oke kwesịrị ịtụle mgbe ị ga-ahọrọ nzacha RF?

Mgbe ị na-emepụta ihe ngwọta RF, ihe nzacha RF na-arụ ọrụ ama ama na sistemụ. Ọ bụrụ na ị na-ahọrọ nzacha RF, ekwesịrị ịtụle paramita ndị a.

1. Ugboro etiti: f0 dị mkpụmkpụ maka etiti etiti nke passband nke nzacha RF, nke a na-ewerekarị dị ka f0 = (fL + fH) /2, na fL na fH bụ akụkụ ugboro ugboro nke ikwu 1dB ma ọ bụ 3dB dobe. site n'aka ekpe na aka nri nke band-pass ma ọ bụ band-stop filter. A na-agbakọ bandwit pass-band nke nzacha eriri warara site na iwere mfu ntinye kacha nta dị ka ugboro etiti.

2. Cutoff Frequency: Maka ihe nzacha dị ala, ọ na-ezo aka n'ebe kwesịrị ekwesị nke pasband, na maka nzacha elu, ọ na-ezo aka n'akụkụ aka ekpe nke passband, nke a na-akọwakarị na 1dB. ma ọ bụ isi ihe ọnwụ ikwu 3dB. Ntụaka maka ọnwụ onye ikwu bụ nke a: maka nzacha ntanye dị ala, nkwụsị ntinye na-adabere na DC, na maka nzacha dị elu, nkwụsị ntinye na-adabere na ugboro kachasị elu na-agafe na-enweghị mgbagwoju anya nkwụsị.

3. BWxdB: Na-ezo aka na obosara ụdịdị a ga-agafe, BWxdB= (fH-FL). fH na fL bụ akara ugboro aka ekpe na aka nri kwekọrọ na X (dB) ewedara dabere na ntinye ntinye na f0 etiti. X = 3, 1, 0.5, ya bụ BW3dB, BW1dB, BW0.5dB, ka a na-ejikarị akọwa njirimara bandwit pass-band nke nzacha. Akụkụ bandwit = BW3dB/f0×100%, nke a na-ejikarị akọwa bandwit pass-band nke nzacha.

 

1. Mfu ntinye: N'ihi nzacha RF, mgbama mbụ dị na sekit ahụ na-ebelata, a na-egosipụta ọnwụ ya na etiti ma ọ bụ nkwụsị oge. Ọ bụrụ na achọrọ nke mfu-band ga-emesi ike.

 

1. Ripple: Na-ezo aka na ọnụ ọgụgụ kasị elu nke ntinye mfu ngbanwe na ugboro ole dabere na mbelata mfu na nso nke 1dB ma ọ bụ 3dB bandwit (mgbe ebipụ).

 

 

1. Passband Riplpe: Ọ na-ezo aka na mgbanwe nke ntinye ntinye na ugboro ole ngafe. Mgbanwe nke pass-band na bandwit 1dB bụ 1dB.

 

1. VSWR: Ọ bụ ihe ngosi dị mkpa iji tụọ ma akara ngosi dị na eriri ngafe nke nzacha dabara nke ọma ma bufee ya. VSWR= 1:1 bụ maka egwuregwu dị mma, VSWR> 1 bụ maka ndakọrịta. Maka nzacha RF n'ezie, bandwit na-eju afọ VSWR <1.5:1 bụkarị ihe na-erughị BW3dB, yana oke ya na BW3dB metụtara usoro nzacha na mfu ntinye.
2. Nlaghachi azụ: Ọ na-ezo aka na decibels ratio (dB) nke ike ntinye na ike ntụgharị nke ọdụ ụgbọ mmiri, bụkwa nke ha nhata | 20Log10ρ|, ρis voltaji reflection coefficient. Ọnwụ nlọghachi enweghị ngwụcha mgbe ọdụ ụgbọ mmiri na-etinye ike ntinye.
3. Ọjụjụ nkwụsi ike: index dị mkpa iji tụọ arụmọrụ nhọrọ nke nzacha RF. Ka index na-adị elu, ka mma nkwụsị nke mgbama nnyonye anya na-apụ apụ. A na-enwekarị usoro abụọ: otu bụ ịjụ ole dB fs na-ebelata maka oge a na-esi na ya pụta, na usoro ngụkọ bụ attenuation as-il na FS; Nke ọzọ bụ ịtụpụta ndepụta index iji mara ogo nke ịdị nso n'etiti nzaghachi njupụta-ugboro nke nzacha na ezigbo rectangle - ọnụọgụ rectangle (KxdB> 1), KxdB = BWxdB/BW3dB, (X nwere ike ịbụ 40dB, 30dB, 20dB, wdg). Ka ihe nzacha na-enyekwu iwu, ka ọ na-enwe akụkụ anọ - ya bụ, ka K na-abịaru nso na uru dị mma nke 1, otú ahụ ka ọ na-esikwu ike ime.

 

N'ezie, ewezuga ihe ndị dị n'elu, ị nwere ike ịtụle ike ọrụ ya, nha maka ngwa ahụ, ma ọ bụ maka ime ụlọ ma ọ bụ n'èzí, yana njikọ njikọ. Otú ọ dị, parampat ndị dị n'elu kachasị mkpa iji kpebie ịrụ ọrụ ya.

Dị ka onye na-emepụta ihe nzacha RF, Jingxin nwere ike inyere gị aka n'okwu nke nzacha RF, wee hazie ihe nzacha na-agafe agafe dịka ngwọta gị si dị. Enwere ike ịkpọtụrụ anyị nkọwa zuru ezu.