The transition region between bound-wave and leaky-wave ranges of a partially dielectric-loaded open guiding structure

Application of the high-gain substrate-superstrate configuration to dielectric leaky-wave antennas

“…1. In the standard configuration [2], the rectangular dielectric guide, of height and width , is not suspended from the bottom plane ( 0). The rectangular dielectric guide dimensions , determine the propagation characteristics of the leaky-wave mode which must be responsible for the radiation of this antenna.…”

“…2 shows the variation with frequency of the phase and attenuation constants for the leaky-wave mode of the nonsuspended LWA ( 0 mm). From the plot of , it can be seen that the leaky-wave mode is a perturbation of the mode of the dielectric guide; results from [2] are also plotted for comparison purposes (note that in [2] is assumed to be infinite). The attenuation constant decreases as the frequency increased, from large values of below the cut-off region (45 GHz) to zero for the surface-wave regimen (above 60 GHz).…”

“…1), previously studied in [2], to improve the frequency response of the leaky-wave mode. It is shown that the new structure synthesizes a flat response for the beamwidth in a large frequency band.…”

Nonorthogonality Relations Between Complex Hybrid Modes: An Application for the Leaky-Wave Analysis of Laterally Shielded Top-Open Planar Transmission Lines

“…In Fig. 11, we present the results for the millimeter-wave laterally shielded slot-line leaky-wave antenna studied by Lampariello et al in [15]. The geometrical parameters according to our nomenclature (see inset of Fig.…”

“…This is an evident result since the PPW mode for does not exist. This is also why other analysis techniques based on single-mode equivalent networks , as derived in [15], do not need to take into account this coupling phenomenon.…”