Dual Polarized Patch Antenna Array with High Isolation and High Gain for In-Band Full-Duplex Wireless Communications
Abstract
As the novel 5G is the next generation of wireless technology, standard communication spectrums become limited. Most of the current wireless communication systems operate in half-duplex or time-division duplexing, where the transmission and reception operate on the same channel, but not simultaneously. New wireless spectrum standards are proposed to address the current crowded spectrum. In-band full-duplex system appears as an excellent candidate for this backhaul connection, which enable transmit and receive operations on the same frequency at the same time. This study proposes a dual polarized planar patch antenna array with high isolation and high gain between transmit and receive ports for full-duplex wireless communications. The antenna system comprises two arrays, each of which is composed of four identical single-ended microstrip rectangular patch antennas operating at 12 GHz. The corporate feeding technique is used to feed the first array, while the second array is fed using the series-fed method. The simulated bandwidths of transmit and receive operations are 1200 MHz and 870 MHz, respectively. The simulated results show good isolation, around – 40 dB during the operating band. The measured results are in good agreement with simulations achieving high isolation bandwidth, reaching as low as – 58 dB at the center frequency. The design also maintains peak gain up to 6.8 dB through the entire band of interest. The high isolation characteristic of the antenna is suitable for cancelling the interference of transmitter on the receiving port. The antenna array also exhibits compact size, good impedance matching, and low cross-polarization.
About the Presenters
Tuan Nguyen
Tuan Nguyen will graduate with a M.S. degree in electrical engineering by the end of this semester, emphasizing in RF antenna design at School of Engineering and Computer Science, Washington State University, Vancouver, WA, USA. After graduating, he will join API Technologies Corp. as an RF Development Engineer in Frederick, MD. In the free time, he enjoys playing soccer, listening to music, and hiking.