%0 Journal Article 
%A Gómez Tornero, José Luis
%A Quesada Pereira, Fernando Daniel
%A Álvarez Melcón , Alejandro
%T Application of the high-gain substrate-superstrate configuration to dielectric leaky-wave antennas
%D 2005
%@ 1531-1309
%U http://hdl.handle.net/10317/647
%X The high-gain substrate-superstrate configuration,
which was proposed to increase the gain in printed circuit antennas,
is applied to dielectric leaky-wave antennas (LWAs) to
improve its frequency response. Analysis of a slitted suspended
dielectric rectangular waveguide is carried out using a full-wave
method. It is proved that the minimum values of the leakage
constant of the leaky-wave mode for the suspended configuration
are related to the high-gain resonance conditions. Moreover, it is
found that the suspended LWA exhibits very small beamwidth
variations in a large frequency bandwidth. It is well-known that
inhomogeneous filled LWAs suffer from variation of beamwidth
as the angle of maximum radiation is scanned with frequency.
The proposed topology can be adjusted so that a flat response of
the beamwidth can be obtained in a large frequency band, while
maintaining the frequency-scanning behavior of the LWA.
%K Teoría de la Señal y las Comunicaciones
%K Antena leaky wave
%K Antena de onda milimétrica
%K Leaky wave antenna (LWA)
%K Millimeter wave antenna
%~ GOEDOC, SUB GOETTINGEN