Abstract

The use of smart antennas with fully adaptive properties is a promising solution for next generation wireless networks aiming to optimize the performance of radio channel and reduce interference. Reconfigurable antennas are desirable in many applications due to their ability to change their pattern, polarization and resonance frequency dynamically. One of the reconfigurable techniques is to use phase shifter loaded with Positive Intrinsic Negative (PIN) diode. In this paper, we propose the design of a switched-line phase shifter at 28 GHz millimeter wave band based on microstrip transmission lines and PIN diodes. The design was achieved using Ansys High-Frequency Structure Simulator (HFSS). A phase shift of 145° ± 7° along the band 24–29 GHz is obtained with an insertion loss below 5dB and a return loss better than 14dB. This proposed circuit can be used in the design of reconfigurable antenna arrays in the mm-wave band.

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