High power efficiency plane microwave oscillator with low phase noise

Abstract

The disclosed microwave oscillator circuit sets up a set of coplane waveguide imperfection band gap structure symmetrically on two sides of resonance end of general plane microwave oscillator. Shape of the coplane waveguide imperfection band gap structure includes: an open-ended ring, the opening towards signal transmission line; one end of a straight line is connected to center on the ring; and passing through the opening, the other end is connected to the gap. A set of coplane waveguide imperfection band gap structure is set up symmetrically on two sides of output end of plane microwave oscillator. Shape of the coplane waveguide imperfection band gap structure includes: connected to symmetrical pulse form curve; one end of a straight line is connected to center on the curve; and the other end is connected to the gap. The disclosed oscillator reduces phase noise clearly, and raises output power in condition of not changing DC power consumption obviously.

Description

field of invention [0001] The invention relates to a microwave oscillator circuit, in particular to a planar microwave oscillator circuit with low phase noise and high power efficiency. technical background [0002] The oscillator is an indispensable and important module of the radio frequency circuit system. The performance of the oscillator, especially the phase noise, has a significant impact on the sensitivity of the radio frequency system. The greater the phase noise of the oscillator, the lower the sensitivity of the receiver system when the oscillator is applied to a radio frequency machine, and vice versa, the higher the sensitivity of the receiver. Like other modules in the RF system, the higher the power efficiency of the oscillator, the better. That is to say, on the one hand, it is hoped that the oscillator can achieve a certain output power while maintaining the lowest DC power consumption. For example: for the local oscillator source used as a mixer, an optima...

AI Technical Summary

Problems solved by technology

Although this pattern etched on the ground plane of the microstrip line can improve the performance of the oscillator, it is difficult to apply it in a monolithic circuit.

Because the monolithic circuit chip with the microstrip line must be pasted on the grounded metal carrier, the pattern on the back of the microstrip line is easily covered, or the corresponding groove must be opened at the corresponding place on the metal carrier, which is It increases the complexity and difficulty of the process

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