Ka-band Single-pole Three-throw Switch Developed

Millimeter wave single pole multiple throw switch is one of the most important device in multi-channel system, widely applied to multi-beam radar, phase array radar system, Electronic warfare system, and so on. Because at present there is no millimeter wave single pole triple throw switch (SP3T) product in our country, so the research has its practically significance.The dissertation mainly researches the Ka band single pole triple throw switches. Two kinds of PIN switches are discussed in theory, simulation and experiment, the simulation results and test results are all included.In microstrip PIN switch 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 analysis and optimize the entire circuits. The test result shows good agreement of the simulation result. The difficulty in design microstrip PIN SP3T switch is the via hole for grounding. We use both the radial parts and the via hole to get a good result. The fin-line PIN switch is fully simulated using full-wave analysis, the parasitic parameter and the circuit assemble need to be considered.