Broadside Radiation Equalization Through Mode Coupling Balancing in Periodic Leaky-Wave Antennas : (Invited Paper)

European Conference on Antennas and Propagation, pp. 1–4

Abstract

Periodic leaky-wave antennas (P-LWAs) may be optimized by equalizing the resonance frequencies of the two radiation modes and their quality factors, i.e., by full-filling the frequency-balancing and Q-balancing conditions. These conditions may be achieved by introducing a proper amount of asymmetry in the unit cell of the P-LWA. This paper extends the previously reported circuital perspective to a full-wave electromagnetic perspective. Specifically, it shows that the required Q-balancing condition corresponds to complete coupling between the longitudinal and transverse modes, which leads to their perfect coalescence. Finally, it illustrates the theory by the numerical example of a series-fed patch (SFP) P-LWA.

Authors 3

1. Amar Al-Bassam Aachen Institute of High Frequency Technology

   RWTH Aachen University

   Affiliation as printed

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany

2. Dirk Heberling Aachen Institute of High Frequency Technology

   RWTH Aachen University

   Affiliation as printed

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany

3. Christophe Caloz

   Polytechnique Montréal

   Affiliation as printed

   Poly-Grames Research Center, Ecole Polytechnique de Montréal, Montréal, Quebec, Canada