| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power amplifier that implements high output power and high efficiency over a wide band. <P>SOLUTION: In the power amplifier having a supply voltage Vdc, a maximum current Imax of a dependent current source of an amplification element, a flow angle θo, and an nth harmonic load impedance Zn=Rn+j*Xn (n=1, 2, 3,...) viewed from the dependent current source, a relationship of resistance values is Σ<SB POS="POST">n=1</SB><SP POS="POST">N</SP>Rn*[sinä(n-1)*θo/2}/än*(n-1)}-sinä(n+1)*θo/2}/än*(n+1)}]/[π*ä1-cos(θo/2)}]=Vdc/Imax, a relationship of reactance values is Σ<SB POS="POST">n=1</SB><SP POS="POST">N</SP>Xn*n*[sinä(n-1)*θo/2}/än*(n-1)}-sinä(n+1)*θo/2}/än*(n+1)}]/[π*ä1-cos(θo/2)}]=0 (N is an arbitrary integer of three or greater), and a minimum value of a voltage of the dependent current source is zero. <P>COPYRIGHT: (C)2013,JPO&INPIT |
