Super-heterodyne ultra-short wave transceiving channel system

A transceiver channel, superheterodyne technology, applied in the field of communication, can solve the problems of high cost, complex structure, etc., to achieve the effect of increasing intermediate frequency frequency, reducing circuit complexity, and facilitating multi-channel integration

Active Publication Date: 2020-04-17
重庆会凌电子新技术有限公司
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  • Abstract
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Problems solved by technology

[0005] Aiming at the technical problems of complex structure and high cost in the prior art, the present invention provides a superheterodyne ultrashort wave transceiver channel system

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  • Super-heterodyne ultra-short wave transceiving channel system

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Embodiment Construction

[0013] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0014] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected 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.

[0015] Please refer to figure 1 As shown, it is a circuit block diagram of a preferred embodiment...

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Abstract

The invention discloses a super-heterodyne ultra-short wave transceiving channel system, and the system comprises N antennas, N switch combinations, N reception channel units and N emission channel units, wherein N is a natural number greater than or equal to 1, and each antenna corresponds to one switch combination, one reception channel unit and one emission channel unit; each receiving channelcomprises a low noise amplifier module, two power dividers, two paths of preselection filter banks, a first low noise amplifier, a second low noise amplifier, a first down converter, a second down converter, a first intermediate frequency amplification filter circuit and a second intermediate frequency amplification filter circuit, and each transmitting channel unit comprises an intermediate frequency bandwidth selection unit, a first up converter, a third local oscillator, a preselection filter bank and a power amplifier unit. According to the super-heterodyne ultra-short wave transceiving system, one-time frequency conversion is adopted, the circuit complexity is reduced, multi-channel integration is facilitated, the intermediate frequency is improved, and the intermediate frequency bandwidth is conveniently expanded.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a superheterodyne ultrashort wave transceiver channel system. Background technique [0002] In the prior art, there are three main advantages of the superheterodyne receiver: first, the intermediate frequency is much lower than the signal carrier frequency, and the selection of the useful channel in the intermediate frequency band is much lower than the selection of the filter Q value in the carrier frequency band many. Second, the signal level received by the receiver from the antenna is generally -120~-100dBm. Such a weak signal needs to be amplified to a level where the demodulator can demodulate or the A / D converter can work. More than 100dB. In order to stabilize the amplifier and avoid oscillation, the gain of the amplifier in a frequency band generally does not exceed 50-60dB; after adopting the superheterodyne receiver scheme, the total gain of the receiver is dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40
CPCH04B1/40
Inventor 卢大鹏冯晓东黎强林波
Owner 重庆会凌电子新技术有限公司
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