C1 和R a 将R1C1和R2C2串联电路改为R16 14证:XC1 2C2并联电路,并设
2
XC
R1 212R1
R1 XC1
2XC
222R2R2
R2 XC2
R1QL
2R2
2 2XCXC2
2
R2 XC2
R12
1 2XCXC1
2
R1 XC1
22
XCXC11
,即R1 2匹配时R1 R2R1 R1 222R2
22
R1 XC11 QLR2 XC2
XC2
R2
1 Q RR
2L
2
1
1
XL1
2
R12R2
1 XC 2 2 XCXC1 2XC2
22
R1 XC1R2 XC2
2
XCR12R1R2R1QL1R1R2R1QL1
2X C122222
R1 XCR12 XCXC21 QL1 QLXC21 QL11
R2
1 QX
LC2
C1 和R b 将R1C1和R2L1串联电路改为R1XC1 2L1并联电路,并设
2
XC
R1 212R1
R1 XC1
2XL1
2R2R2
2
R2 XL1
R1QL
2R2
2XL1XL1
2
R2 XL1
R12
1 2XCXC1
2
R1 XC1
22XC1XL11
,即R1 2匹配时R1 R2R1 R1 2R2
222
R1 XC11 QLR2 XL1
XL1
R2
1 Q RR
2L
2
1
1
XC2
2R2R12
1 XC 1 2 XLXL1 2XC1
22
R2 XL1R1 XC1
2
XCRRRQRQR2RQRQ 212 12 1L2 1L2 1L2 1L2
R1 XC1XL11 QL1 QLQLXL11 QL1 QL
R2 1 QX LL1
1 天线断开,工作于过压6 18解:状态,集电极直流电表读数减小,天线电流表读数为0;
2 天线接地,工作于欠压状态,集电极直流电表读数略增,天线电流表读数增加; 3 中介回路失谐,工作于欠压状态,集电极直流电表读数略增,天线电流表读数减小。 1 PA P PC Pk 10 3 1 6 W 6 19解:
2 k
PA6
85.7%
P PC10 3P
10 3
70%10
3 c P PC
PA6 60%P 10