Rakesh V.S. (EMP151) Asst. Prof. ECE, Vidya Academy of Science & Technology EC403: Microwave & Radar Engg. Module-1 Lecture-2 Reference Text Book: Microwave Devices and Circuits Samuel Y. Liao Module-1 Microwaves: Introduction, advantages Cavity Resonators- Rectangular and Circular wave guide resonators- Derivation of resonance frequency of Rectangular cavity. Microwave vacuum type amplifiers and sources: Klystron Amplifiers - Re-entrant cavities, Velocity modulation, Bunching (including analysis), Output power and beam loading Text Books: Microwave Devices and Circuits: Samuel Liao Microwave and Radar Engineering: M. Kulkarni Introduction to Radar Systems: Merrill I. Skolnik Waveguide Cavities Microwave Cavity Resonators Microwave Cavity Resonators Cavities, or resonators, are used for storing energy Used in klystron tubes, band-pass filters and frequency meters It’s equivalent to a RLC circuit at high frequency Their shape is that of a cavity, either rectangular or cylindrical. Microwave Cavity Resonators Dominant Mode of Cavity Resonator Within the waveguide cavity resonator, various TEmnp and TMmnp modes exists. The mode having the lowest resonant frequency is known as “dominant mode” Rectangular Cavity Resonators Rectangular Cavity Resonators Rectangular Cavity Resonators Rectangular Cavity Resonators Rectangular Cavity Resonators Rectangular Cavity Resonators Circular Cavity Resonator Circular Cavity Resonator (Cylindrical Cavity Resonator)
