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

Journal ar
IEEE Microwave and Wireless Components Letters
  • Volumen: 15
  • Número: 4
  • Fecha: 01 April 2005
  • Páginas: 250-252
  • ISSN: 15311309
  • Source Type: Journal
  • DOI: 10.1109/LMWC.2005.845731
  • Document Type: Article
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. © 2005 IEEE.

Author keywords

    Indexed keywords

      Funding details