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Microwave power amplifier

A microwave power and amplifier technology, applied in the direction of power amplifiers, amplifiers, high-frequency amplifiers, etc., can solve problems such as power amplifier oscillation

Inactive Publication Date: 2004-08-11
ELECTRONICS & TELECOMM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In other words, the power amplifier using the feedback circuit according to the above prior art still has the problem of potential oscillation in the low frequency band

Method used

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  • Microwave power amplifier
  • Microwave power amplifier
  • Microwave power amplifier

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Embodiment Construction

[0017] Embodiments of the present invention will be explained below with reference to the drawings. Although the present invention has been described in connection with preferred embodiments, the present invention is not limited to these embodiments, and modifications and changes within the scope of the invention will be apparent to those skilled in the art.

[0018] figure 2 is a circuit explaining the structure of the microwave power amplifier of the preferred embodiment of the present invention. The circuit includes: a first driver amplifier stage 200 , a second driver amplifier stage 240 , and a third power amplifier stage 280 . A microwave power amplifier using a negative feedback circuit, an RC parallel circuit, and a shunt resistor according to a preferred embodiment of the present invention will be described in detail below.

[0019] refer to figure 2 , the microwave power amplifier that uses negative feedback circuit, RC parallel circuit and shunt resistance In e...

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Abstract

A microwave power amplifier comprising a drive amplifying stage includes power elements, gate and drain bias circuits of the power elements, a RC parallel circuit connected between input port and gates of said power elements, a shunt resistor connected between ground terminal and said gates of power elements, and a negative feedback circuit connected in series with resistors and capacitors and in parallel with the power elements. An interstage matching circuit is connected in series with the drive amplifying stage; and a power amplifying stage including power elements connected in parallel with a power divider and a power coupler, gate and drain bias circuits of said power elements, a RC parallel circuit connected between the gates of power elements and the interstage matching circuit, and a shunt resistor connected between a ground and the gates of power elements.

Description

technical field [0001] The invention relates to a microwave power amplifier, in particular to a microwave power amplifier using a negative feedback circuit, an RC parallel circuit and a shunt resistor. Background technique [0002] When designing a power amplifier in the millimeter wave band, a high-value gain in the low frequency band is obtained due to the characteristics of the components. Also, due to modeling limitations, oscillations are always possible at low frequency bands. [0003] In the prior art, a feedback circuit is used in a power amplifier to stabilize the amplifier. See, for example, the following publications, incorporated herein by reference: IEEE Trans On MTT, Vol. 49, in June 2001, Joao Caldinhas Vaz et al., entitled "Millimeter-Wave MonolithicPower Amplifier for Mobile Broad-Band System" Article, which discloses a MMIC (Microwave Monolithic Integrated Circuit) power amplifier for 60GHz MBS (Mobile Broad-Band System). In this publication, by using 0....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/189H03F3/60
CPCH03F3/605H03F3/189
Inventor 姜东敏尹亨燮金海千赵庚翼
Owner ELECTRONICS & TELECOMM RES INST
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