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Single-end-structure low noise amplifier

A low-noise amplifier and amplifier technology, which is applied in the direction of improving the amplifier to reduce the influence of noise, can solve the problem that the low-noise amplifier cannot take into account the input and output standing wave ratio and the gain of the noise figure amplifier at the same time, and achieve simple circuit structure, low cost, and The effect of a small number of components

Inactive Publication Date: 2015-12-16
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low noise amplifier to overcome the shortcoming that the low noise amplifier in the prior art cannot take into account input and output standing wave ratio, noise figure and amplifier gain at the same time

Method used

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Embodiment Construction

[0020] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0021] In the description of the present invention, it should be noted that unless otherwise specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. In addition, the terms "first" and "second" are used for descriptive purposes only, and s...

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Abstract

The invention relates to the technical field of microwave communication equipment, and particularly discloses a single-end-structure low noise amplifier. The single-end-structure low noise amplifier comprises an amplifying tube, an input matching circuit, an output matching circuit, a direct-current bias circuit and a grounded micro-strip line, wherein a grid electrode of the amplifying tube is connected with the input matching circuit; a source electrode of the amplifying tube is connected in series with the grounded micro-strip line, and grounded; a drain electrode of the amplifying tube is connected with the output matching circuit; the direct-current bias circuit is connected between the input matching circuit and the output matching circuit; the input matching circuit performs minimum noise matching with a Smith circle diagram, and uses a T type micro-strip line structure; the output matching circuit performs maximum gain matching with the Smith circle diagram, and uses the T type micro-strip structure; and the direct-current bias circuit is supplied with power by a resistance self-bias single power supply. Smith circle diagram matching and the T type micro-strip structures are adopted in the input and output circuits, so that good performance parameters are achieved at the same time, and input and output standing-wave ratios, a noise coefficient and a gain are taken into account at the same time.

Description

technical field [0001] The invention relates to the technical field of microwave communication equipment, in particular to a low-noise amplifier with a single-ended structure in the 10GHz frequency band. Background technique [0002] The low noise amplifier is an active device, which is widely used in various communication equipment and is located at the front end of the receiver. Its main function is to amplify the weak signal received by the antenna. Minimize noise while providing gain. Therefore, it is extremely important to design an amplifier with low noise, reasonable gain, and stable and reliable performance in the design of the front end of the receiver. However, the low-noise amplifier in the prior art has the disadvantage that the input-output standing wave ratio, the noise figure and the amplifier gain cannot be taken into account at the same time. Contents of the invention [0003] The object of the present invention is to provide a low noise amplifier to ove...

Claims

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Application Information

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IPC IPC(8): H03F1/26
Inventor 房晓勇孙超
Owner YANSHAN UNIV
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