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An ultra-wideband (UWB) phase shifter with wide range of differential phase shift is proposed. To achieve this performance, the design uses quarter wavelength parallel coupled lines combined with short-ended stub structure and an impedance transformer. The value of the differential phase can be adjusted through varying the coupling coefficient of the coupled lines along with the length and impedance...
Compact planar phase shifters with wide range of differential phase shift across ultra-wideband frequency are proposed. To achieve that performance, the devices use broadside coupled structure terminated with open-ended or short-ended stubs. The theory of operation for the proposed devices is derived. To validate the theory, several phase shifters are designed to achieve a differential phase ranging...
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