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Broadband receiving assembly with relatively high second harmonic suppression

A second harmonic and broadband receiving technology, applied to electrical components, transmission systems, etc., can solve problems such as impossibility, limited cancellation effect, consistent and symmetrical circuits, etc., and achieve the effect of reducing the time invested in research and development

Pending Publication Date: 2022-04-05
NO 8511 RES INST OF CASIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in engineering practice, it is impossible to achieve a completely consistent symmetrical circuit, and different initial phases will result in limited cancellation effects

Method used

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  • Broadband receiving assembly with relatively high second harmonic suppression
  • Broadband receiving assembly with relatively high second harmonic suppression
  • Broadband receiving assembly with relatively high second harmonic suppression

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the figure). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0021] In the present invention, unless...

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Abstract

The invention discloses a broadband receiving assembly with relatively high second harmonic suppression, the assembly adopts four stages of amplification links to compress a 58dB dynamic range, each stage of amplification link realizes harmonic cancellation by an amplification cancellation unit circuit, and an adjustable attenuator is adopted to adjust gain distribution and circuit matching, so that the harmonic suppression is relatively high. And a temperature compensation attenuator is adopted to ensure the three-temperature consistency of the output power of the receiving link. Each amplification and cancellation unit circuit is formed by cascading two 180-degree mirror image baluns and a low-noise amplifier, a test result after actual assembly shows that in-band second harmonics can be suppressed by about 30dBc, the index requirement of 25dBc of the missile-borne platform is met, and in-band static noise and stray also conform to design expectation.

Description

technical field [0001] The invention belongs to the technical field of microwave communication, in particular to a broadband receiving component with high second harmonic suppression. Background technique [0002] In recent years, aerospace electronic equipment has gradually developed in the direction of "miniaturization, wide frequency band, high dynamic range", and the performance requirements of circuit components are getting higher and higher. [0003] The demand for key metrics for electronic systems continues unabated. Specifically, broadband high-power amplifying components not only require higher transmit power, but also have stricter requirements for related indicators such as in-band spurs, harmonics, and noise. [0004] For microwave broadband receiving components, low-noise amplifiers are widely used in existing mature products. Low-noise amplifiers generally have relatively high gain, but subject to the P1dB index, the main signal output will not change when it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/16
Inventor 朱翰韬梁锋陈舟魏信阳许剑南马乐娟相海露余芃佳焦明月郑光伟
Owner NO 8511 RES INST OF CASIC