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Two-stage frequency conversion broadband receiver

A broadband receiver and mixer technology, applied in the electronic field, can solve the problems of low frequency stability, low integration, and low stability, and achieve stable and reliable performance, high integration, and excellent technical indicators

Inactive Publication Date: 2012-07-04
DFINE TECH
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Problems solved by technology

[0009] This invention aims to solve the technical problems of traditional products such as low integration, low frequency stability, poor suppression of phase noise and stray signals, and low stability. To provide a two-stage variable frequency wideband receiver with stable and reliable performance, high integration, and excellent technical indicators such as frequency stability, phase noise, and spurious signal suppression

Method used

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Embodiment Construction

[0020] The detailed structure of the present invention, application principle, function and effect, refer to the appended figure 1 , which will be described through the following embodiments.

[0021] The input end of the limiter 1 of the present invention is connected to an external input source, and its output end is connected to the single input end of the single-pole double-throw switch 29, and the double output ends of the latter are respectively connected to the input ends of the filter one 2 and the filter two 3; The double input end of SPDT switch one 4 is connected to the output terminal of filter one 2 and filter two 3, and its single output end is connected to the single input end of SPDT switch one 5; the three output terminals of SPDT switch one 5 Connect the input terminals of digital control attenuator one 6, amplifier one 7 and direct connection line respectively; the three input terminals of single pole three throw switch two 8 are respectively connected with ...

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Abstract

The invention relates to a two-stage frequency conversion broadband receiver, which relates to the technical field of electronics and aims to resolve technical problems that a traditional product is not high in integrated level and frequency stability, poor in phase noise and spurious signal suppression, not high in stability and the like. The two-stage frequency conversion broadband receiver is a two-stage frequency conversion structure, a preselector filter group consists of a first filter 2 and a second filter 3, an RF (radio frequency) inputting radio frequency signal passes through a limiter I and the preselector filter group, modes of the RF inputting radio frequency signal are selected after the RF inputting radio frequency signal passes through the preselector filter group, then twice frequency conversion is carried out, the signal is amplified in a filtered manner in frequency conversion processes, and finally, an intermediate-frequency signal with the frequency of 70MHz is outputted.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a broadband receiver used in civil aviation, spaceflight, maritime communication, scientific research and exploration, etc. Background technique [0002] The wideband receiver is a key component in the communication system. With the rapid development of communication technology and the variety of modern modulation systems, the congestion of the wireless spectrum is increasing. The receiver's linearity, dynamic range, sensitivity, and anti-interference ability , Adaptability and other aspects of performance and indicators put forward more and more stringent requirements. [0003] The existing frequency conversion wideband receivers generally have the following deficiencies: [0004] 1) The degree of integration is not high; [0005] 2) The frequency stability is not high; [0006] 3) Phase noise and spurious signal suppression are not good; [0007] 4) Poor performance st...

Claims

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Application Information

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IPC IPC(8): H04B1/16
Inventor 杜浩钦郑艳英
Owner DFINE TECH
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