C wave band voltage-controlled oscillator

Abstract

The invention discloses a C wave band voltage-controlled oscillator. The C wave band voltage-controlled oscillator comprises a load circuit for changing the resonant frequency, a transistor circuit for enabling the whole circuit to oscillate, a terminal circuit for meeting the oscillation condition, a first match circuit and a second match circuit. The load circuit is connected with the transistor circuit through the first match circuit, and the transistor circuit is connected with the terminal circuit through the second match circuit. According to the voltage-controlled oscillator with the center frequency being any frequency point in a C wave band, the circuit is simple in structural design, cost is low, the requirement for the machining precision is not high, high cost performance is achieved, and the C wave band voltage-controlled oscillator has the advantages of being low in phase noise, wide in tuning range, good in linearity, high in output power, stable in in-band power and the like.

Description

technical field [0001] The invention relates to a voltage-controlled oscillator (VCO for short), in particular to a C-band voltage-controlled oscillator, which belongs to the technical field of microwave communication. Background technique [0002] With the rapid development of the communication field, the requirements for electronic equipment are getting higher and higher, and the voltage-controlled oscillator is one of the very important components in the radio frequency communication system. A voltage-controlled oscillator is an oscillating circuit whose output frequency corresponds to the input control voltage, that is, the output frequency is a function of the input signal voltage. It is mainly used in phase-locked loops and frequency synthesizers to achieve an accurate reference frequency, which is critical to the performance of communication systems. [0003] At present, there are many units researching and producing integrated voltage-controlled oscillator VCO at ho...

AI Technical Summary

Problems solved by technology

It can be seen from the literature published by representative domestic scientific research units, such as the Institute of Microelectronics of the Chinese Academy of Sciences, the State Key Laboratory of Application-Specific Integrated Circuits and Systems of Fudan University, and the Institute of Radio Frequency and Optoelectronic Integrated Circuits of Southeast University, etc., that domestic C-band In the design and implementation of VCO, the 0.18μm CMOS process is often used. The phase noise at 1MHz frequency offset can often reach -110dBc / Hz, and the performance can reach below -120dBc / Hz, but there are also complicated design and high cost. High problem, cost performance is not high

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