A novel leaky-wave antenna combining an image NRD guide and a strip circuit

This letter presents a novel leaky-wave antenna which combines an image NRD (nonradiative dielectric) guide and a printed strip circuit. The proposed structure allows for an easier, cheaper and more flexible tapering mechanism than all previous leaky-wave antennas in NRD technology. The working mech...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2005, Vol.4, p.289-292
Main Authors: Gomez-Tornero, J.L., Pascual-Garcia, J., Alvarez-Melcon, A.
Format: Article
Language:English
Subjects:
Analytical models
Antenna radiation patterns
Antennas
Antennas and propagation
Circuit simulation
Circuit topology
Circuits
Design engineering
Dielectrics
Leaky wave antennas
Leaky-wave antennas (LWAs)
Lighting
millimeter wave antennas
Millimeter wave technology
NRD (nonradiative dielectric) guide
printed-circuit technology
Rectangular waveguides
Simulation
Strip
tapered antennas
Tapering
Three dimensional
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Summary:This letter presents a novel leaky-wave antenna which combines an image NRD (nonradiative dielectric) guide and a printed strip circuit. The proposed structure allows for an easier, cheaper and more flexible tapering mechanism than all previous leaky-wave antennas in NRD technology. The working mechanism is explained, and two different tapering strip-circuit topologies are proposed. Cosine tapered illuminations are designed using a two-dimensional leaky-mode analysis technique. Simulations with high-frequency structure simulator (HFSS) three-dimensional analysis are presented for validation purposes. Also, the influence of the feeding transitions for each printed-circuit design is studied. Results show the feasibility of one of the proposed designs, leading to a tapered radiation pattern with sidelobes level below -20 dB.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2005.855637