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Power amplifier, power distributor, and power combiner

A power amplifier and power divider technology, which is applied in the direction of power amplifiers, amplifiers, push-pull amplifiers, etc., can solve problems such as different high-frequency characteristics, changes in gain characteristics of ordinary power amplifiers, etc.

Inactive Publication Date: 2005-02-09
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in amplifiers modularized by integration, pairs of series resonant circuits or pairs of stubs have slightly different high-frequency characteristics from each other due to the influence of adjacent components
This may change the gain characteristics of ordinary power amplifiers

Method used

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  • Power amplifier, power distributor, and power combiner
  • Power amplifier, power distributor, and power combiner
  • Power amplifier, power distributor, and power combiner

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0057] figure 1 is a schematic structural diagram of the power amplifier 1 according to the first embodiment of the present invention. exist figure 1 Among them, the power amplifier 1 includes: an input terminal 100; a balun / matching circuit 101; a first amplifying element 102a; a second amplifying element 102b; an inductor 103a connected to the drain of the first amplifying element 102a; Inductor 103b to the drain of the second amplifying element 102b; output terminal 104; distributed constant lines 105a and 105b connected between the output terminal 104 and the drain of the first amplifying element 102a; series resonant circuit 106. The first and second amplifying elements 102a and 102b have the same specification.

[0058] One end of the series resonance circuit 106 is connected between the distribution constant lines 105a and 105b so as to be in parallel with the distribution constant lines 105a and 105b. Also, the other end of the series resonance circuit 106 is conn...

no. 2 example

[0064] figure 2 is a schematic structural diagram of the power amplifier 2 according to the second embodiment of the present invention. exist figure 2 Among them, the power amplifier 2 includes: an input terminal 100; a balun / matching circuit 101; a first amplifying element 102a; a second amplifying element 102b; an inductor 103a connected to the drain of the first amplifying element 102a; the inductor 103b to the drain of the second amplifying element 102b; the output terminal 104; the distributed constant lines 205a, 205b and 205c connected between the output terminal 104 and the drain of the first amplifying element 102a; the series resonant circuit 206a and 206b. exist figure 2 , components similar to power amplifier 1 are figure 1 The same reference numerals as shown are indicated, so a detailed description will not be given here.

[0065] One end of the series resonance circuit 206a is connected between the distribution constant lines 205a and 205b so as to be i...

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Abstract

In a power amplifier of the present invention, distributed constant lines (105a and 105b) have a total line length corresponding to a 1 / 2 wavelength of a fundamental wave so as to invert the phase of a fundamental wave component of a first signal amplified by a first amplification element (102a). A series resonant circuit (106) is connected a tone end between the distributed constant lines (105a and 105b), which invert the phase of a second-order harmonic component, so as to be in parallel connection with the distributed constant lines (105a and 105b). Further, the series resonant circuit (106) is connected at the other end to an output side of the second amplification element (102b). The series resonant circuit (106) resonates with a second-order harmonic frequency, thereby canceling out the second-order harmonic component.

Description

(1) Technical field [0001] The present invention relates to a high-frequency power amplifier, in particular to a push-pull high-frequency power amplifier, and a power divider and a power combiner applied therein. (2) Background technology [0002] Figure 6 It is a structural schematic diagram of a conventional push-pull high-frequency power amplifier. exist Figure 6 Among them, the conventional power amplifier 9 includes: an input terminal 900; a balun / matching circuit 901; field effect transistors (FETs) 902a and 902b of the same specification; Inductors 903a and 903b; output terminal 904; distribution constant line 905 connecting output terminal 904 and the drain of field effect transistor 902a; A series resonant circuit 906a connected in parallel with the field effect transistor 902a; a series resonant circuit 906b connected in parallel with the output terminal 904 and the drain of the field effect transistor 902b. [0003] The balun / matching circuit 901 inverts the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/26H03F3/60
CPCH03F3/265H03F2200/06H03F3/602
Inventor 森本滋足立寿史
Owner PANASONIC CORP