%0 Journal Article 
%A Gómez Tornero, José Luis
%A Torre Martínez, Alejandro de la
%A Cañete Rebenaque, David
%A Álvarez Melcón , Alejandro
%A Guglielmi, Marco
%T Design of tapered leaky-wave antennas in hybrid  waveguide-planar technology for millimeter  waveband applications
%D 2005
%@ 0018-926X
%U http://hdl.handle.net/10317/663
%X Different types of waveguide leaky-wave antennas,
asymmetrically perturbed with printed-circuits, are studied in
this paper. The capability to modify the leakage constant of the
excited leaky-wave mode, while maintaining unchanged its phase
constant, is studied in detail for each design. Several slot and strip
configurations are proposed, in which the width and the position
of the planar printed circuit perturbation is modified along the
length of the antenna to obtain different tapering topologies. All
of them are mechanically flexible to realize, thus simplifying the
manufacturing process for millimeter wavelengths applications.
The two-dimensional method used for the analysis is accurate
for any geometry of the planar perturbation, and also allows for
the computation of the whole spectrum of modes in these open
waveguides. This makes possible to predict the appearance of
unwanted channel-guide modes, and also allows for the study
of the coupling effect between the desired leaky-wave mode and
them. A tapered design is performed and compared with full-wave
three-dimension simulations to validate the proposed technology.
%K Teoría de la Señal y las Comunicaciones
%K Tecnología del híbrido de circuito impreso y  guía de ondas
%K Antena de fuga de ondas
%K Disminución de antenas
%K Hybrid waveguide printed circuit technology
%K Leaky-wave antenna
%K Millimeter wave antenna
%K Nivel de lóbulos laterales
%K Tapering antenna
%K Sidelobes level control
%~ GOEDOC, SUB GOETTINGEN