Conformal Wideband Circularly Polarized H-Plane Horn Antenna Integrated With Quasi-Yagi

• Published in: IEEE transactions on antennas and propagation Vol. 72; no. 6; pp. 5379 - 5383
• Main Authors: Zhao, Yun, Wang, Ai-Zhong, Zhang, Shao-Min, Ding, Jiang-Qiao
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna arrays; Antenna measurements; Antenna radiation patterns; Antennas; Bandwidth; Broadband; Broadband antennas; Circular polarization; conformal antenna; Cylinders; Dielectric substrates; Electrical measurement; Frequency ranges; H-plane horn antenna; Horizontal polarization; Horn antennas; low profile; Radiation; Substrate integrated waveguides; Vertical polarization; Voltage standing wave ratios; wideband antenna
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2024.3397650

A conformal circularly polarized (CP) H-plane horn antenna with broadband and low-profile characteristics is proposed in this communication, which is integrated with quasi-Yagi and wrapped around a hollow cylinder. The H-plane horn based on bent corrugated substrate integrated waveguide (BCSIW) technology and the quasi-Yagi with fan-shaped driving elements provide the vertical and horizontal linear-polarized waves, respectively, which generates CP radiation combined with the suitable phase delay provided by the transition section. The proposed antenna is wrapped around a hollow metallic cylinder with a radius of 100 mm and a height of 90 mm. The measured voltage standing wave ratio (VSWR) of the fabricated antenna is less than 2.0 in the frequency range over 9.4 GHz (81%), while the axial ratio (AR) is below 3 dB from 9.4 to 21.7 GHz (78%). The antenna also exhibits a stable radiation pattern with a peak gain of 12.1 dBi and a cross-polarization below −17 dB over the whole frequency range. It is observed that the measured results agree well with simulated ones.