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Broadband LNA for satellite communications

A satellite communication and broadband technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems such as poor stability, insufficient bandwidth, and high cost, and achieve the effects of low cost, improved stability, and high stability

Inactive Publication Date: 2018-12-18
南京秀餐网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a broadband LNA for satellite communication, which solves technical problems such as high cost, insufficient bandwidth, large noise and poor stability

Method used

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  • Broadband LNA for satellite communications

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Embodiment Construction

[0027] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. The following description includes various specific details to aid in understanding, but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. Also, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0028] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art tha...

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Abstract

The invention discloses a wideband LNA for satellite communication, which comprises a plurality of low noise field effect transistors connected in series, each low noise field effect transistor beingrespectively provided with a bias circuit. The invention adopts a microstrip branch line matching structure and a low-noise field effect transistor multi-cascade connection mode, utilizes a bias circuit with temperature compensation effect, solves the problems of low noise, wide band and easy self-excitation of the K-band receiver, and achieves a good balance between performance and volume cost. The invention uses scientific matching mode to organically integrate the transistor and the low-noise field effect transistor, and realizes the characteristics of low cost, low noise, high gain, wide bandwidth, high stability, compactness and the like. The microstrip branched line matching structure has the characteristics of broadband. This bias circuit has the temperature compensation characteristic and improves the stability of the broadband amplifier.

Description

technical field [0001] The invention relates to the technical field of Ka frequency band VSAT application, in particular to a broadband LNA for satellite communication. Background technique [0002] The K-band receiver (LNB) is a terrestrial satellite communication device whose function is to realize the communication between the Ka-band satellite and the ground station. LNB has the characteristics of ultra-low noise, small size, high gain, and high frequency stability. The K-band receiver (LNB) and the Ka-band transmitter (BUC) form a radio frequency outdoor unit (ODU), and together with the antenna feeder and the indoor unit (IDU), they form a complete Ka-band satellite transceiver. [0003] Among the many radio frequency indicators of the K-band receiver (LNB), the key indicators are noise figure, gain, phase noise, frequency stability and spurs, etc.; for the K-band receiver (LNB), the main difficulty: cost , bandwidth, noise and stability. LNA technology is usually u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18578
Inventor 石亦超
Owner 南京秀餐网络科技有限公司
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