Design of Miniaturized, Circularly Polarized, Dual Band mm-Wave Antenna for 5G Communication

Abstract

As the need for 5G connectivity has grown, millimeter-wave (mm-Wave) wireless technology has been extensively used. Since there is so much available bandwidth, mm-Wave bands are more dependable for higher data rates. The frequency ranges of 28 GHz and 38 GHz are two of the most promising options for fifth-generation communication among the various mmWave bands putout. In millimeter-wave mobile communication, circularly polarized (CP) antennas are greatly desired in order to minimize the delay spread in a multipath propagation. The suggested antenna has circular polarisation and is designed to work at two center frequencies (28/38 GHz). The antenna has L-shaped slots loaded over the patch at its borders, which allows it to operate in two bands and have circular polarisation. The antenna is implemented on a FR-4 substrate with a loss tangent of 0.025, a substrate height of 0.8 mm, and a relative permittivity of 4.3. CST Microwave Studio's electromagnetic simulation software is used to implement the design. The antenna is 8 x 8 mm2in size overall. It is possible to achieve peak gains of 5.4 dBi and 5.25 dBi at 27.8 GHz and 39.6 GHz, respectively. The antenna's prototype is fabricated and tested for validation. Since the simulated and measured results are in close agreement, the antenna is suitable for 5G communication.