Novel Designs of Reflective Type Phase shifters for Millimeter wave application
نویسندگان
چکیده
Design and Implementation of highly efficient Reflective type phase shifters (RTPS) at 60GHz has been proposed in this work. Low loss cost effective design which utilizes less chip area is proposed. At high frequencies, to improve the efficiency of the communication system highly directional high gain antennas have to be used. Phase shifters are one of the most important elements in phased array antenna system. Phase shifters are used to shift the phase of the input signal. To reduce the losses, instead of passive elements active elements such as active inductors and varactors are used in this work. By using active elements the utilization of chip area can be reduced. Three designs of Reflective type phase shifters with spiral inductor, active inductor and MOS varactor as reflective load are proposed in this work. RTPS with spiral inductor as load has produced a constant phase shift of -83. A variable range of phase shift has achieved for RTPS with active inductor load and MOS varactor load. At 60 GHz path loss is very high due to the small wavelength thus it is necessary to use high gain antenna. Phased array antennas are capable of producing narrow, high gain beams . Keywords— Active inductor, Hybrid coupler, Millimeter wave, Reflective type phase shifter, Varactor, 60GHz.
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