One-dimensional photonic bandgap (PBG) structures and piezoelectric transducer (PET) controlled devices for microwave applications

In this dissertation, “photonic bandgap (PBG) structures” and “piezoelectric transducer (PET) controlled devices” which are not conventionally used in microwaves are developed to obtain better performance with planar transmission-lines. A new technique of the PBG structure is applied to design band stop filter, high Q resonator, and varactor tunable resonator, which are demonstrated with analyses for optimum performance, full-wave simulations, and experimental results. The PET controllability is applied to microwave circuits: phase shifter, tunable resonator, tunable filter, voltage controlled dielectric resonator oscillator (VCDRO), demonstrated with theoretical and parametric analyses, simulations, and measurement data. For a phased array antenna, a multi-line PET phase shifter dramatically reduces the number of phase shifters, and a bi-directionally controlled dual-PETs phase shifter increases beam scanning range. A whole phased array antenna system consists of a wideband power divider, PET phase shifter, multi-frequency diplexer, and microwave monolithic integrated circuits (MMICs) amplifiers, which system shows the low-cost, four-channels and full-duplex functions. This dissertation's PBG and PET ideas and applications should be useful for microwaves and millimeter-waves.