A CPW‐fed compact square slot antenna with wideband circularly polarized for C‐band application

Abstract

This paper presents a compact wideband circularly‐polarized square slot antenna (CPSSA). The antenna is a coplanar waveguide feed structure with three T‐stubs toward the slot center and one semi‐circle tuning stub was etched to the feed line and modified inverted L‐shaped strips around the corners of the ground. Moreover, two spiral slots were loaded in the ground plane for exciting currents in a different direction. A prototype of the designed antenna is fabricated and measured to confirm the simulation results. A reasonably good agreement between the measured and simulated results in terms of the reflection coefficient <−10 dB and axial ratio are achieved. The 3‐dB axial ratio bandwidth achieved by the combination is from 4.35 to 8.15 GHz (60%, measured). The designed CPSSA has a compact size of 0.57λₒ × 0.57λₒ × 0.0116λₒ at the center frequency and fabricated on the FR4 substrate.

A wideband antenna based on self‐packaged suspended coplanar waveguide technology

“…[1][2][3][4][5] Recently, wideband antennas are more and more popular because they can transmit/receive more information compared with narrow-band ones. Wideband antennas 2,[5][6][7][8][9][10][11][12][13][14][15] can be realized by using an AMC reflector, 2 metasurface reflector, 15 folded dipole technique, 5 slot antenna technique, 6,7,9,14 and low-temperature cofired ceramics, 8 and so on. Today, wideband antennas have been essential components of radio frequency front end in base station and radar systems.…”

Design of a wideband Y‐shaped antenna for the application in IoT and 5G communication

“…1 The metallic strip present in the central position of the fed can be elongated beyond the patch antenna to realize a monopole antenna. 2 Moreover, the design of the central strip takes a major part in deciding antenna parameters. Strip line feeding antennas, despite their small size, can give outstanding bandwidth efficiency.…”