Abstract
In this paper, two different six-port correlators by using 90° hybrid couplers, with or without a Wilkinson power divider, were designed and simulated at the center frequency of 77 GHz. The performance of the designed correlators are assessed via full-wave commercial electromagnetic package, Advanced Design System (ADS) of Keysight Technologies. The simulation results show that the six-port correlator structure with four 90° hybrid couplers and without Wilkinson power divider gets wider bandwidth and smaller phase error in comparison to the another six-port correlator. Besides the structure with Wilkinson has low error at the output voltage signals with phase difference of 0°, 180°, 90° and 270°. Both structure individually have relative importance in the design of the wireless terminals as a modulator and demodulator in receiver and transmitter instead of using mixer.
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