Millimeter Wave High-level - Mixing Components

In the millimeter-wave receiver system, low-noise amplifier and mixer are critical components. The performance of low-noise amplifier has a significant impact to the overall noise of the receiver system, while the mixer is used to achieve the frequency conversion function of the receiver system.Based on project requirements, the task is to design home-made of Ka-band high-level amplify - mixing component, the component is composed by a low-noise amplify module and the mix module. Suspended microstrip line and finline are used as transmission medium. All parts are designed with home-made device and made by using a hybrid integration technology way to achieve the critical components of the receiver front-end. The main task of this paper are: the theoretical analysis and design of a new rectangular waveguide - microstrip transition converter circuit; engineering design and tune measurement of Ka-band low-noise amplifier; the engineering design and tune measurement of Ka-band mixer; joint debugging and testing of Ka-band high-level amplify - mixing component.This design of mixer uses finline - suspended microstrip single-balanced mixer structure, the circuit between finline and suspended microstrip line constitutes a 180°phase-knot, and the mixing diodes are reverse parallelled between finline and suspended microstrip line. The introduction, analyse, design, machine and testing of suspended microstrip low-pass filter, band-pass filter, rectangular waveguide - suspended microstrip probe transition circuit, rectangular waveguide - finline transition circuit that used in the mixer circuit will be described in the second chapter. In the fourth chapter, there are descriptions of the mixer's basic theory, key indicators, and the basic circuit form. The structure design and processing of the mixer circuit is done combined with the results of the second chapter, and the test results are given out.Low-noise amplify module is another part of this thesis. Based on the project requires home-made low-noise amplification chip are used and the two low-noise amplification chip are loaded in a back to back waveguides - microstrip transition circuit. The design and processing of low-noise amplify module is finally finished after chip DC bias circuit is designed according to the chip information. The main technical indicators and design of low-noise amplifier, low-noise amplification chip selection and the implementation of low-noise amplify module will be described in the third chapter. In the second chapter, a novel bandpass filter based on matamaterial theory is introduced and the simulation result and the verification method are given.Based on the above the development of the Ka-band high-level amplify - mixing component are finally completed and a detailed test results is given out. In the end, according to the test results, some problems showed in the design are presented and the improvement method is given.