Song, M; Zhang, X; Wang, Z; Xu, D; Loh, T H; Gao, S (2024) 3D-printed Spiral Inverted Ridge Circularly Polarized Horn Antenna with One Octave Bandwidth. IEEE Antennas and Wireless Propagation Letters, 23 (10). pp. 3018-3022.

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Abstract

This paper presents a novel 3D-printed spiral inverted ridge horn antenna with excellent broadband circularly polarized (CP) performance in the frequency range of 8 GHz – 16 GHz. For the first time, a circled dash shaped inverted ridge is proposed to enhance the bandwidth of the circular waveguide. Through careful investigation of the propagation characteristics of the proposed inverted ridge, it has been found that, in order to achieve high-performance circular polarization over one octave bandwidth, the total length of the spiral inverted ridge should be one guided wavelength of the lowest operating frequency. 3D printing technology is utilized to manufacture the proposed antenna for the desired geometric complexity. The measured results validate the accuracy of simulated results, with a measured axial ratio (AR) of less than 1.5 dB and a reflection coefficient of less than -14 dB in the 8 GHz – 16 GHz frequency range. Moreover, the measured 3 dB beamwidth of the radiation pattern remains stable between 41° and 70°.

Item Type:	Article
Subjects:	Electromagnetics > Wireless Communications
Divisions:	Electromagnetic & Electrochemical Technologies
Identification number/DOI:	10.1109/LAWP.2024.3418498
Last Modified:	22 Aug 2025 13:53
URI:	https://eprintspublications.npl.co.uk/id/eprint/10219