Shortwave pre-post selector

A prognostic selection and preselector technology, applied in electrical components, transmission systems, etc., can solve problems such as poor selectivity, and achieve the effects of low bottom noise, fast frequency switching, and simple control methods.

Pending Publication Date: 2017-05-24
SHAANXI FENGHUO ELECTRONICS
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] In the traditional shortwave pre-selector, the pre-selector mostly adopts the mode of first amplification and then two-stage filtering, while the post-selector mostly adopts the mode of first two-stage filtering and then amplification. Good, but relatively poor selectivity

Method used

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  • Shortwave pre-post selector

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Embodiment Construction

[0022] 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 some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] An embodiment of the present invention provides a short-wave pre-selector, such as figure 1 As shown, the shortwave preselector is arranged inside the shortwave radio station, and the shortwave preselector is provided with a preselector signal input terminal, a postselector signal input terminal, a preselector signal output terminal and a postselector signal output terminal; The short-wave pre-selector includes: a control unit, a limiter protection unit...

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Abstract

The invention belongs to the technical field of digital tuning frequency hopping communication, and discloses a shortwave pre-post selector, which is high in frequency hopping speed, stable and reliable to work and is stable to realize higher selectivity; the shortwave pre-post selector is arranged in a shortwave radio station, and a pre-selector signal input end, a post selector signal input end, a pre-selector signal output end and a post selector signal output end are arranged on the shortwave pre-post selector; and the shortwave pre-post selector comprises a control unit, an amplitude limiting protection unit, a first transmitting-receiving conversion unit, a first wave band conversion unit, a first resonant unit, an amplifying unit, a second resonant unit, a second wave band conversion unit and a second transmitting-receiving conversion unit.

Description

technical field [0001] The invention belongs to the technical field of digital tuning and frequency hopping communication, and in particular relates to a short-wave preselector. Background technique [0002] With the continuous advancement of frequency hopping communication technology, the pre-selector has been recognized by more and more designers for its superior performance indicators, and has been widely used in military and civilian communication systems. Reflection attenuation is performed due to frequency mismatch in the stop band, so as to realize the signal spectrum filtering function. [0003] In the traditional shortwave pre-selector, the pre-selector mostly adopts the mode of first amplification and then two-stage filtering, while the post-selector mostly adopts the mode of first two-stage filtering and then amplification. Good, but relatively poor selectivity. Contents of the invention [0004] Aiming at the shortcomings of the above technologies, the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/715
CPCH04B1/715H04B2001/7152
Inventor 邓发旺卢攀杨爱军马建斌
Owner SHAANXI FENGHUO ELECTRONICS
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