Research And Design Of Millimeter-wave Detector

Millimeter wave detector is the common component of millimeter wave system. At present,there are millimeter wave detector products for engineering practice in abroad.We are just proficient in microwave detector design in domestic,and do little research in millimeter wave detector design.The detectors which we use are always bought from abroad when the detected signals whose frequency reach millimeter wave band.For this sense,the research has its important engineering value.The dissertation mainly researches the Ka band microstrip detector and W band fin-line detector.Detector theory, simulation method,model building, passive circuits such as transition,match network and filter are discussed.In the end, we complede the circuits design.In Ka band microstrip detector design,we use the circuit simulation method,firstly we use full-wave analysis method to extract S matrix of passive components;and then we use ADS to analyse and optimize the entire circuits.The test results show good agreement with the simulation results.In W band fin-line detector design, we use three-dimensional full-wave field analysis instead of circuit simulation because of the limitation of the circuit structure.We consider the influence of the parasitic parameters of diode and circuit assemble,which makes the design feasible.The modeling of the diode influence the reliability of the simulation results especially in millimeter wave band.It is difficult to design the match network,because the influence of diode's parasitic parameters become especially severe when the frequency is high.We use several kinds of match networks and experiment time after time to get a good result.Using several analysis methods of electromagnetic field,which makes the simulation results have good agreement with the test results,the engineering design is convenient.