| dc.description.abstract | In this study, reconfigurable microwave passive components are proposed. First, a novel reconfigurable circuit with four different functions is presented. The four different functions are branch coupler, rat race coupler, bandpass filter and bandstop filte.It is achieved by controlling the switches to change the connection statue of the transmission lines.A design example in PCB is presented, and the operating frequency is 2 GHz. The circuit size is 44.0 mm × 58.0 mm while the electrical size is 0.2933〖 λ〗_0× 0.3867〖 λ〗_0 at 2 GHz. In order to reduce the circuit area, reconfigurable microwave passive components are then miniaturized and realized in CMOS and GaAs IC processes. The operating frequency is set at the X band, between two different functions, i.e., a branch coupler or a bandpass filter. For the GaAs version, the chip size is 1.35 mm × 1.24 mm and the electrical size is around 0.0419〖 λ〗_0× 0.0384 〖 λ〗_0 at 10 GHz. For the CMOS version, the chip size is 0.911 mm × 0.515 mm and the electrical size is around 0.0282〖 λ〗_0× 0.0160 〖 λ〗_0 at 10 GHz. Both of them exhibit a circuit size similar to that of the conventional single-function circuits, but they can achieve two different functions. | en_US |