30-3000 MHz ultrashort wave receiver

Abstract

The invention discloses a 30-3000 MHz ultrashort wave receiver consisting of a channel unit, a first local oscillator unit, a second local oscillator unit and a third local oscillator unit, wherein the local oscillator signal output of the first local oscillator unit is connected with the input of a first medium mixer, the local oscillator signal output of the second local oscillator unit is connected with the input of a second medium mixer, and the local oscillator signal output of the third local oscillator unit is connected with the input of a third medium mixer. The 30-3000 MHz ultrashort wave receiver disclosed by the invention can stably receive 30-3000 MHz ultrashort wave signals and output the 30-3000 MHz ultrashort wave signals at a medium frequency of 70 MHz, the amplitude of the medium frequency can be stably output within a required range, and if 5 receivers simultaneously work, a maximal frequency coverage range can achieve 100 MHZ, and the frequency can automatically correct at a ultrashort wave frequency band; and the 30-3000 MHz ultra-short wave receiver disclosed by the invention has the advantages of strong signal detecting capability, low error rate, few signal distortion conditions, high signal to noise ratio, good spurious suppression effect, strong anti-interference capability, good ultra-short wave communication effect, simple structure and low cost, and the like.

Description

technical field [0001] The invention relates to a 30-3000MHz ultrashort wave receiver. Background technique [0002] The wavelength of ultrashort wave is between 1 and 10 meters, also known as meter wave, its propagation stability is better than that of short wave, it is less affected by seasonal and diurnal changes, the frequency is higher, the frequency band is wider, and it can be used for multi-channel communication. Frequency modulation is usually used, the signal-to-noise ratio is high, and the communication quality is better than short-wave; at present, ultra-short-wave communication technology is widely used in the transmission of television, FM radio, radar, navigation and mobile communications and other business fields. The ultrashort wave communication system consists of a terminal station and a relay station. The terminal station is equipped with a transmitter, receiver, carrier terminal, and antenna. The relay station is equipped with a transmitter, a receiver, ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing ultrashort wave receivers generally have low linearity, insufficient dynamic range, poor signal detection ability, high bit error rate, serious signal distortion, poor anti-interference ability, high phase noise, poor spurious suppression effect, and ultrashort wave Poor communication effect, complex structure, high cost, etc.

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