Near-Field Focusing With Bi-Directionally Fed Frequency-Scanned Antennas for Proximity Sensing | Zendy

Guillermo Ingles Munoz | Zendy; Alvaro Duran Alonso | Zendy; Jose Antonio Lopez-Pastor | Zendy; Alejandro Gil-Martinez | Zendy; Astrid Algaba-Brazalez | Zendy; Jose Luis Gomez-Tornero | Zendy

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Near-Field Focusing With Bi-Directionally Fed Frequency-Scanned Antennas for Proximity Sensing

Author(s) -

Guillermo Ingles Munoz,

Alvaro Duran Alonso,

Jose Antonio Lopez-Pastor,

Alejandro Gil-Martinez,

Astrid Algaba-Brazalez,

Jose Luis Gomez-Tornero

Publication year - 2025

Publication title -

ieee open journal of antennas and propagation

Language(s) - English

Resource type - Magazines

eISSN - 2637-6431

DOI - 10.1109/ojap.2025.3592129

Subject(s) - fields, waves and electromagnetics , communication, networking and broadcast technologies , aerospace

The application of one-dimensional bi-directional fed frequency-scanning leaky-wave antennas for proximity sensing is studied in this work. Using the two opposite ports of a microstrip antenna, a nearfield focused radiation pattern which varies with frequency is obtained. This type of frequency-diverse pattern can be used for sensing in the Fresnel region of the antenna. A simple half-width microstrip leaky-wave antenna with 35 cm of length is designed to operate in the 5.5 GHz band. The successful synthesis of nearfield focusing patterns on the proximity of the antenna, and which strongly vary in the frequency range from 5.18 GHz to 5.72 GHz, is theoretically and experimentally demonstrated. Finally, it is illustrated how this type of antenna can be applied to sense in a region of 50 cm x 50 cm surrounding the aperture.

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