Miniaturized Patch Array Antenna Using CSRR Structures for 5G Millimeter-Wave Communication Systems

This paper presents a novel design of a 28 GHz miniaturized 1 × 4 patch antenna array with a low profile configuration based on Complementary Split Ring Resonators (CSRRs). Along with a return loss of 45 dB and a bandwidth of 1.5 GHz, the proposed structure exhibits low side lobes with a high gain of 13.7 dBi and an efficiency of 97%, as well as a beamwidth of 20° and 49° in the E and H-planes, respectively. With a compact size of 27 × 13 × 0.787 mm3, the good agreement between measured and simulated data makes the proposed array suitable for 5G millimeter-wave communication systems.