Dual-polarized inverted quad-ridged flared horn antenna with one decade bandwidth for OTA testing

Xue Zhang; Zhengpeng Wang; Chong Pan; Xinran Ba; Yi Wang

doi:10.1109/LAWP.2022.3162337

Dual-polarized inverted quad-ridged flared horn antenna with one decade bandwidth for OTA testing

Xue Zhang, Zhengpeng Wang, Chong Pan, Xinran Ba, Yi Wang

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

This paper presents a dual-polarization inverted quad-ridged flared horn antenna with an extremely wideband of more than one decade in the range of 2-20 GHz. The modes of the inverted quad-ridged waveguide are analyzed first. A cross-shaped inverted ridge, with low TE11 mode cutoff frequency and a tip significantly higher than the horn aperture, is proposed. The inner surface of the horn wall is based on a composite curve flare rate. It is optimized to cooperate with the inverted ridge. Furthermore, the PTFE back cavity replaces metal back cavity to suppress the high order mode in the back cavity. The measured isolation between the two orthogonal linearly-polarized ports is nearly 45 dB and the reflection coefficient is less than -15 dB over the entire working frequency band.

Original language	English
Pages (from-to)	1233-1237
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	21
Issue number	6
Early online date	25 Mar 2022
DOIs	https://doi.org/10.1109/LAWP.2022.3162337
Publication status	E-pub ahead of print - 25 Mar 2022

Keywords

Antenna radiation patterns
Bandwidth
Cutoff frequency
Frequency measurement
Horn antennas
Probes
Reflection coefficient

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Cite this

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abstract = "This paper presents a dual-polarization inverted quad-ridged flared horn antenna with an extremely wideband of more than one decade in the range of 2-20 GHz. The modes of the inverted quad-ridged waveguide are analyzed first. A cross-shaped inverted ridge, with low TE11 mode cutoff frequency and a tip significantly higher than the horn aperture, is proposed. The inner surface of the horn wall is based on a composite curve flare rate. It is optimized to cooperate with the inverted ridge. Furthermore, the PTFE back cavity replaces metal back cavity to suppress the high order mode in the back cavity. The measured isolation between the two orthogonal linearly-polarized ports is nearly 45 dB and the reflection coefficient is less than -15 dB over the entire working frequency band.",

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Dual-polarized inverted quad-ridged flared horn antenna with one decade bandwidth for OTA testing

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Keywords

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