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Abstract

This paper introduces a novel RF phase shifter design that operates at constant phase shift over operation frequency range. The proposed phase shifter utilizes the conventional reflective-type phase shifter which is inherently frequency-dependent. The introduced reflective-type phase shifter design is integrated with an adaptive control circuit that varies the required DC voltage as a function of the frequency. Thus, the phase shift will be relatively constant throughout the frequency of operation compared to the conventional frequency-dependent reflective-type phase shifter. The phase shifter is designed to operate at 90˚ and is shown to maintain that phase shift with around 15˚ compared to the conventional design where the phase shift varies by more than 60˚ at the same bandwidth. The proposed design, including the adaptive controlled circuit, is fabricated, and the measured data agree with simulations.

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Dr. Waleed Alomar

Dr. Abdullah Alburadi

Dr. Meshaal Alyahya

Prof. Hussein Shaman