A broadband circularly polarized monopole antenna for millimeter‐wave short range 5G wireless communication

Abstract

This article describe the design and measurement of a broadband circularly polarized (CP) monopole antenna for millimeter wave short range 5G Wireless communication applications. This antenna is comprised of a T-shaped monopole antenna with an inverted-L grounded stub and an asymmetric coplanar wave guide feed. To attain the broadband CP, an inverted-L grounded stub is embedded in the coplanar ground and introducing asymmetry in the horizontal T-shaped patch connected feed line monopole antenna. A compact size of 1.877λ L × 1.706λ L × 0.130λ L is accomplished when measured at lower edge frequency (f L,|S11|). For the proposed antenna structure conforming to f L,|S11| , a measured 3-dB axial ratio bandwidth of 13.67% (4 GHz, 27.26-31.26 GHz), impedance bandwidth of 27.9% (8.3 GHz, 25.6-33.9 GHz), peak gain of 7.15dBi, and a bidirectional patterns with a dual sense polarization are attained.

Efficiency enhancement techniques of microwave and millimeter‐wave antennas for 5G communication: A survey

“…The defective ground structure (DGS) is employed in the microstrip antenna to enhance efficiency, bandwidth, and mutual coupling between neighboring elements, as well as to suppress higher‐order harmonics and cross‐polarization 1,66‐68 . DGS is made by etching one or more periodic/aperiodic slots in the ground.…”

Design Consideration, Challenges and Measurement Aspects of 5g Mm-Wave Antennas: A Review

“…In [83], a broadband circularly polarized T-shaped monopole antenna with an inverted L grounded stub and coplanar waveguide (CPW) feed is reported for mm-Wave short range 5G communications. The inverted L-grounded stub is embedded with a horizontally T-shaped patch radiator to realize circular polarization.…”

“…19. The summary of cited circularly polarized state-of-the-art mm-Wave antenna works [81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96] are illustrated in Table 5.…”

Gain enhancement of a wideband rectangular ring monopole millimeter‐wave antenna using artificial magnetic conductor structure

“…The broadband, wideband, and high gain antennas are preferable because they met the requirement of very high channel capacity and low latency of 5G communication. The numerous antennas for different categories are reported for sub‐6 GHz and mmWave systems by the researchers and focused mainly on the enhancement of the bandwidth and radiation performance of the antenna 1–34 . The bandwidth of the diverse antennas was enhanced by introducing various elementary techniques such as multilayer configuration, 1 tapering of the structure, 2 waveguide aperture/proximity coupled/differential feeding and parasitic elements, 3–5 and embedding stubs/strips/slots in the ground plane/radiating patches 6–8 .…”