Dispersion properties of periodic grounded structures via equivalent network synthesis

A Simple Technique for the Dispersion Analysis of Fabry-Perot Cavity Leaky-Wave Antennas

“…Since a single mode TEN is employed, the accuracy of this technique is reduced for sub-wavelength profile antennas. Although it is possible to produce multiport TEN [23] and other formulations of the eigenvalue problem to obtain the complex dispersion of bound and leaky modes of 2D periodic structures using full-wave techniques, such as MoM [22], the associated eigenvalue equations, zeros of the impedance matrix equation, typically take non-canonical form [24], [25], which is cumbersome to solve numerically in the complex plane. Techniques based on the Finite-Difference Time-Domain (FDTD) method have also been developed in order to extract the dispersion of the complex wavenumber for this type of antennas [26], [27].…”

“…The complex dispersion of Fabry-Pérot LWAs with a PRS consisting of 2-D periodic metallodielectric arrays was first extracted in [22] employing a Transverse Equivalent Network (TEN) and a pole-zero method to estimate the equivalent impedance of the array. Since a single mode TEN is employed, the accuracy of this technique is reduced for sub-wavelength profile antennas.…”

A novel technique for the design of frequency selective structures integrated with a waveguide array

“…The performances are achieved by using a double-plane FSS structure of folded dipoles. A preliminary design is first obtained adopting a single mode equivalent TL for the FSS (similar to the one in [2]). With this simple and agile tool the requirements can be fulfilled and the relevant parameters can be tuned very efficiently.…”