??????? ??? ??????? ??? ???? ?????????? ??????? ?? ????????? ???? ????????? ????????????? ??????? ?????????? ??? ???? ???? ??? ?? ????? ???? ?????????????? ???? ?? ?????? ???? ??????, ??? ?? ??? ??? ??? ??? ????????? ??????????? ????????
?. ??????? ??? ????????? ??? ???
- Pass Band: ???? ????????? ????????????? ????? ?????? ???????? ?? ????? (low attenuation) ????? ??? ???? ?????
- Stop Band: Pass Band ?? ????? ???? ????? ??? ???? ?????????????, ???????? ??????? ???? ????
??????: ??? ???? BPF ?? ????? 14�14.35 MHz ???, ??? ??? ????????? 20m Amateur Radio Band ?? ???????? ??? ???? ??? ???? ?? ???? ?????
?. ???????????? ?????
- Center Frequency (f?): Pass Band ?? ???????? ??????????????
- Bandwidth (BW): Upper Cut-off Frequency (f?) ??? Lower Cut-off Frequency (f?)-?? ?????????
- BW=f2?f1BW = f_2 - f_1
- BW=f2??f1?
- Q-Factor: ????????? ???????????? ????? ?????
- Q=f0BWQ = \frac{f?}{BW}
- Q=BWf0??Q ?? ????, ??????? ?? ???? ??????????
?. ??????? ??? ????????? ???
- ??????? ??????? ??? ???????
- ??????: Inductor (L) ??? Capacitor (C)
- RF ????????????? ???? ????????
- ????????? ??????? ??? ???????
- ??????: ??-???????, R, C
- ?? ????????????? ?? ???? ????????????? ???? ????????
?. ??????? BPF ?? ???????
- Receiver Front-End: ??????? ??????? ????? ???? ?? ???????? ???? ?????
- Transmitter Harmonic Control: ????????? ??????? ??? ????? ??? ???????? ????????? ???????
- Multi-Band Radio: ???????-??????? ?????? ?????????
- Contest / DXing: ???????? ????????? ???????? ???? ????????????? ??????
- ?. ??????? ???????????? ?????Desired Pass Band � ??? ???????? ??? ???? ?? ?????????
- Filter Topology � ???? Butterworth (??????? ???????), Chebyshev (????? ???-??), Elliptic (???????? ?????????)?
- Component Quality � RF ????????????? ???? Q-????? ????????? ? ?????????? ??????? ???? ????
- Insertion Loss � ??? ?????????? ????? ?? ?? ???? ????, ?? ?????
?. ?????? � 20m Amateur Band BPF
- Pass Band: 14.000 � 14.350 MHz
- Stop Band: < 13.5 MHz ??? > 14.8 MHz
- Q: ?????? 60�80
- ??? HF ????????? ????? ???? ????? ???????? ????????? ????????? ???????? ???? ???, ?? ????????? ????????? ???????? ???????????? ?????
? ????????:
??????? ??? ??????? ????????? ???? ????????????? ????????? ?????????? ????? ??? ??? ??? ?????????? ?????? ??? ????? ?????, ??????? ????????, ???? ????????, ??? ???????? ????????????? ??? ????????? ???? ???????1