Vertically Polarized Omnidirectional Reflector Antenna Fed by a Circular Waveguide Bent TM<sub>01</sub> Mode Converter for the 150 GHz Band
A vertically polarized horizontal-plane omnidirectional antenna with a circular waveguide bent <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{TM}_{01}$</tex> mode converter and an axisymmetric single reflector is designed and fabricated for the 150 GHz band. Determining a frequency range of 147.8 GHz to 170.0 GHz as the operational band, where the transmission coefficient ratio of the <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{TE}_{11}$</tex> mode to the <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{TM}_{01}$</tex> mode is less than 1/3 that in the designed mode converter, the realized gain is 2.2 dBi to 8.8 dBi, and the angular gain variation at the measured frequencies in the band is 4.9 dB at the maximum in the fabricated antenna
Authors
- Takashi Tomura (ORCID: https://orcid.org/0000-0002-9272-8298)
- Jiro Hirokawa (ORCID: https://orcid.org/0000-0001-8720-6180)
- Ryo Yanagisawa
- Issei Watanabe (ORCID: https://orcid.org/0000-0001-8833-378X)
Institutions
- Tokyo Institute of Technology (JP)
- Institute of Science Tokyo (JP)
- National Institute of Information and Communications Technology (JP)
Publication Details
- Journal
- IEICE Communications Express
- Published
- 2025-03-12
- DOI
- https://doi.org/10.23919/comex.2025spl0010
- Citations
- 2
- Primary Topic
- Antenna Design and Analysis
- Type
- article
- Field-Weighted Citation Impact
- 9.99