-A A +A
We present a Bessel-beam launcher based on a leaky radial waveguide consisting of a capacitive sheet over a ground plane that supports higher-order leaky modes. A propagating Bessel beam is generated above the radiating waveguide. The Bessel beam is transverse-magnetic (TM) polarized with a vertical component of electric field that is a zeroth-order Bessel function of the first kind. A higher-order leaky-wave mode is used to reduce losses at millimeter waves and, at the same time, avoid the thin dielectric layers used in previously proposed lower order leakywave Bessel launchers. Closed-form design equations are provided for the proposed structure. In addition, the operating bandwidth of the launcher is defined using dispersion analysis. Near-field measurements of a prototype operating in the frequency range 38- 39.5 GHz validate the concept. The measured launcher generates a Bessel beam with a …
Publication date: 
1 Mar 2016

Walter Fuscaldo, Guido Valerio, Alessandro Galli, Ronan Sauleau, Anthony Grbic, Mauro Ettorre

Biblio References: 
Volume: 64 Issue: 3 Pages: 904-913
IEEE Transactions on Antennas and Propagation