Аннотация:Two kinds of reconfigurable microwave couplers are presented.The first one is a 90-degree branch-line coupler with a wide range of tunable coupling ratios.When its coupling ratio is tuned to be 1, this coupler becomes a crossover.The second one possesses a reconfigurable performance between a rat-race coupler and a 90-degree coupler.Varactors are loaded to both couplers as the tuning elements.By applying suitable control voltages, reconfigurable performance is realized.Closed-form equations are derived to theoretically analyze the proposed devices.To further verify the design theory, both structures are simulated.Moreover, the first coupler is fabricated and characterized.
Год издания:2014
Источник:2022 IEEE 65th International Midwest Symposium on Circuits and Systems (MWSCAS)
