???? 144/430MHz?5~50W - PowerPoint PPT Presentation

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Title:

???? 144/430MHz?5~50W

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... 144MHz FM SSB/CW -19dB /FM -15dB SSB ... Mixer ... – PowerPoint PPT presentation

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Tags: 50w | mixer | 430mhz

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Title: ???? 144/430MHz?5~50W


1
???????????
  • ???????
  • ??????
  • ??3
  • ??18?6?30?

2
3.????
  • ???????????????
  • ?????
  • ?????
  • ??????
  • ?????
  • ???(????????)

3
3.????
  • ???????????
  • ???? 144/430MHz?550W
  • ???? FM?????????SSB????
  • ????????? -60dB??(144/430MHz?)
  • ??????? 40dB?? ???????? 40dB??
  • ???? 144MHz? SSB/CW??????????????
  • 144MHz? FM?????????????
  • ???? SSB/CW-19dBµ??/FM-15dBµ??
  • ??? SSB/CW2.3kHz (-6dB)??/4.2kHz(-60dB)??
  • FM15kHz(-6dB)??/30kHz(-60dB)??
  • ????? 2.0W??(8O?10??)

4
3.????
  • ????

5
3.????
6
3.????
  • ????

?????????G ? G A/(1-Aß) 1-Aßgt1???G ?A
?????????????????? 1-Aßlt1???G ?A
??????????????????????????????????????
7
3.????
  • ????(?????)

Z
Z (1 - ?2LC2) / j?(C1C2-?2LC1C2) ?????
??? ß Z / (RZ)1/j?C2 / (j?L 1/j?C2) 1
/ j?(C1C2-?2LC1C2)R 1 - ?2LC1 ??A
-R2/R1??????????????C1C2-?2LC1C2 0 ??
v(C1C2) / LC1C2 ???????????? Re(Aß)
(R2/R1)(C1/C2) 1????R1C2R2C1
8
3.????
  • ????(?????)

??????? ?1/v(L1L2)C ??????
(R2/R1)(L1/L2)1 ???R1L2 R2 L1
9
3.????
  • ???????(???)

??????????????????????????? ?????(????)
???????????(Passive Mixer)???????,FET
(????)????????????(Active Mixer)????
10
3.????
  • ????(AM????)

11
3.????
vm(Vc Vs cos st)cos?c tVc (1mcos st)cos?c t
???mVs/V(A-B)/(AB)???????? ????????
12
3.????
  • ????(AM????)

13
3.????
  • ????(FM?????)

???????????????????????????????????????????????Ck
vs(t)
14
3.????
  • ???vs????vc???????
  • ????

15
3.????
  • ????(FM?????)

????????????????
16
3.????
  • ??????

17
3.????
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