Application of the high-gain substrate-superstrate configuration to dielectric leaky-wave antennas
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Research GroupGrupo de Electromagnetismo Aplicado a las Telecomunicaciones (GEAT)
Knowledge AreaTeoría de la Señal y las Comunicaciones
SponsorsThis work was supported by Spanish National Projects ESP2001-4546-PE and TIC2000-0591- C03-03, by Regional Seneca Projects 2002 PB/4/FS/02 and PMPDI-UPCT- 2004, and by the EPSON-Ibérica Foundation.
PublisherIEEE Microwave Theory and Techniques Society
Bibliographic CitationGÓMEZ TORNERO, José luis, QUESADA PEREIRA, Fernando Daniel, ÁLVAREZ MELCÓN, Alejandro. Application of the high-gain substrate-superstrate configuration to dielectric leaky-wave antennas. IEEE Microwave Theory and Wireless Component Letters, 15 (4): 250-252, Abril 2005. ISSN 1531-1309
KeywordsAntena leaky wave
Antena de onda milimétrica
Leaky wave antenna (LWA)
Millimeter wave antenna
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.
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