A frequency synthesizer for a miniaturized ODU receiving channel

Abstract

A frequency synthesizer for a miniaturized ODU receiving channel comprises a phase detector, a loop filter and a voltage controlled oscillator, wherein the phase detector, the loop filter and the voltage controlled oscillator are serially connected. The first reference source input end of the phase detector is electrically connected to an external reference source. The NC interface of the phase detector is electrically connected with a single chip microcomputer, The output end of the phase detector is electrically connected to the input end of the loop filter, the output end of the loop filteris electrically connected to the voltage control end of the voltage controlled oscillator, the output end of the oscillation signal of the voltage controlled oscillator outputs a composite signal, and the output end of the oscillation signal is also electrically connected to the second reference source input end of the phase detector. The composition of the chip and the interface network used inthe circuit is further disclosed. The frequency synthesizer is applied to the satellite communication receiving channel, which can change the required synthesized signal frequency by parameter configuration, and has the characteristics of stability and reliability. It also has the advantages of saving power, reducing volume and cost.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a frequency synthesizer suitable for a satellite communication miniaturized ODU receiving channel. Background technique [0002] In satellite communication equipment, ODU (Out-door Unit) refers to the outdoor unit, mainly including frequency conversion and power amplification, which can be divided into transmission channel and reception channel. The transmission channel usually refers to BUC (Block Up-Converter), That is, the up-conversion power amplifier, and the receiving channel mainly refers to LNB (Low Noise Block down-converter), that is, low noise amplifier and frequency converter. [0003] In satellite communication equipment, a frequency synthesizer is usually required as an oscillating signal source, and the oscillating frequency generated by the frequency synthesizer in the receiving channel usually needs to be adjustable to meet the application requirements for ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a frequency synthesizer for the miniaturized ODU receiving channel, which solves the problems in the prior art that the frequency is not easy to control, and the circuit composition is complicated, there are many components and parts, and the power consumption is large.

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