Horizontally Polarized Array Antenna Using Hybrid Resonant Mode for Millimeter-Wave Radar Application

This letter presents a high-gain hybrid resonant antenna for millimeter-wave radar application. The presented antenna contains several units; each unit contains an EH 1 -mode segment and a TEM-mode segment. The EH 1 -mode segments are radiative, and the TEM-mode segment is aimed to generate a phase...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2024-09, Vol.23 (9), p.2802-2806
Main Authors: Li, Hui-Dong, Zhu, Lei
Format: Article
Language:English
Subjects:
Antenna arrays
Antenna design
Antenna measurements
Antenna radiation patterns
Antennas
Dispersion curve analysis
Electric fields
High gain
Horizontal polarization
Horizontally polarized (HP) radiation
hybrid resonant mode antenna
Microstrip antennas
Millimeter waves
phased array
Phased arrays
Polarized radiation
Radar antennas
Radar arrays
Radiation
Segments
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Summary:This letter presents a high-gain hybrid resonant antenna for millimeter-wave radar application. The presented antenna contains several units; each unit contains an EH 1 -mode segment and a TEM-mode segment. The EH 1 -mode segments are radiative, and the TEM-mode segment is aimed to generate a phase difference of 180°. Under this assignment, the radiative electric fields are all in-phase on the antenna aperture, thus realizing the expected high-gain radiation. The design method of this hybrid resonant antenna is deeply investigated based on the dispersion curves of the EH 1 mode and the TEM mode. For verification, the presented antenna with ten units is practically implemented and measured. The obtained results indicate that the desired horizontally polarized radiation with a high gain of 13.6 dBi is well maintained in the H plane. In final, the presented antenna is employed to form an eight-element phased array. The designed phased array is fabricated and tested, showing that the array has realized a beam scanning angle from -40° to + 30°.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2024.3408153