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An integrated microstrip meander line (MML) slow-wave structure (SWS) comprised of an MML SWS and compact wideband metamaterial absorber (MMA) is proposed and demonstrated theoretically and experimentally in this paper. The MMA consists of metallic rectangular resonators with a metallic ground plane and a separating dielectric layer. Simulation results show that the MMA has multidistinctive absorption...
We report the design and simulation of a metamaterial microwave triple-band absorber for microstrip meander-line slow wave structure. The compact single unit cell consists of four reversed electric ring resonators and a metallic ground plane separated by a dielectric layer. Simulation results show that the absorber has three distinctive absorption peaks which can be used to absorb the back-wave in...
Noise performance parameters are important parameters for TWTs used in many scenarios. We proposed in the paper an electron gun noise parameter estimation method for electron guns with non-ideal electron-beams. And noise parameters for several electron guns were simulated and analyzed. The results can be used for reference of low-noise electron gun design.
In order to apply the traveling wave tubes (TWTs) in the active phased array radar system, new mini-TWT, i.e., multiple electron beam helix TWT (MBTWT) is studied. It is made by putting 3 helixes and electron beams into one metal tube and one PPM focus system. They have common electron gun and collector. The electron gun has a common heater and 3 emitting cathode heads which produce 3 electron beams...
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