Radio frequency linear power amplifier circuit
A technology for amplifier circuits and radio frequency power, applied in power amplifiers, amplifiers, improved amplifiers to reduce nonlinear distortion, etc., can solve problems such as power amplifier linearity degradation, improve efficiency, and shorten the time for repeatedly adjusting current limiting resistors , good linearity effect
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[0033] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0034] 1. In the two-port network, S 21 Derivation of parameters
[0035] like Figure 5 As shown, the two characteristic impedances are Z 0 At the junction of the transmission line, there is a load impedance Z L , the voltage drops at the left and right ends of the transmission line are V 1 and V 2 , the corresponding port currents are I 1 and I 2 ; The incident voltage wave for forward transmission is set to V i + (i=1,2), the corresponding current is The reflected voltage wave is set to V i -(i=1,2), the corresponding current is From the above, we can list the equation relationship (Note: Admittance Y L =1 / Z L ):
[0036]
[0037] I 1 +I 2 =Y L V 2
[0038] first order to find S 11 , then the above formula can be changed to:
[0039]
[0040]
[0041] Organized: ...
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