Microwave Near-field Focusing Beam Generation by Zeroth-Order Inward Cylindrical Traveling Leaky Wave

Ping Lu (1) , Damien Voyer (2) , Julien Huillery (3) , Arnaud Bréard (3) , Xue-Song Yang (4)

1 SCU - Sichuan University [Chengdu]
2 EIGSI - École d'Ingénieurs en Génie des Systèmes Industriels [La Rochelle]
3 MIS - Ampère, Département Méthodes pour l'Ingénierie des Systèmes
4 UESTC - University of Electronic Science and Technology of China [Chengdu]

In this letter, a method is proposed to generate the near-field focusing beam in microwaves by using the TM-polarized Zeroth-order Inward Cylindrical Traveling Leaky Wave (ZICTLW), whose normal electric-field component is a truncated zeroth-order Hankel function of the first kind. The focusing property of ZICTLW is analyzed. Furthermore, the relation between the focusing property and the truncation region, which is used to remove the singularity, is investigated. In order to generate a focusing beam, a ZICTLW antenna is designed based on a three-layer radial waveguide with both a capacitive sheet and a planar high impedance sheet covered. The simulation and the measurement validate the proposed antenna can generate a focusing zone that can be controlled by the operating frequency.

Mots clés: leaky wave antennas; planar high impedance sheet; Microwave near field focusing; Hankel function

Domaines: Energie électrique

Ping Lu, Damien Voyer, Julien Huillery, Arnaud Bréard, Xue-Song Yang. Microwave Near-field Focusing Beam Generation by Zeroth-Order Inward Cylindrical Traveling Leaky Wave. IEEE Antennas and Wireless Propagation Letters, 2018, pp.1-1. ⟨10.1109/LAWP.2018.2886575⟩. ⟨hal-01956495⟩