Bandwidth Enhancement of Resonant Slot Array Antennas

A new method of increasing the bandwidth of resonant slot array antennas is presented. The proposed method, unlike the traditional one, does not use the matching condition to the waveguide; instead, a criterion is imposed so that the input impedance variation of the waveguide slot is minimized. The results show that the proposed method can enhance the bandwidth of the structure up to some 3 times in comparison to the traditional approach. Moreover the overall gain of the antenna within the frequency of operation is improved by the new method.

[1]  Surya Pal Singh,et al.  ELLIPTICALLY BENT SLOTTED WAVEGUIDE CONFORMAL FOCUSED ARRAY FOR HYPERTHERMIA TREATMENT OF TUMORS IN CURVED REGION OF HUMAN BODY , 2006 .

[2]  M.E. Bialkowski.  Analysis of a coaxial-to-waveguide adaptor incorporating a dielectric coated probe , 1991, IEEE Microwave and Guided Wave Letters.

[3]  AXIALLY SLOTTED ANTENNA ON A CIRCULAR OR ELLIPTIC CYLINDER COATED WITH METAMATERIALS , 2005 .

[4]  S. Silver.  Microwave antenna theory and design , 1949 .

[5]  Marek E. Bialkowski,et al.  Analysis of a coaxial-to-waveguide adaptor including a discended probe and a tuning post , 1995 .

[6]  R. Elliott.  Antenna Theory and Design , 2003 .

[7]  Atef Z. Elsherbeni,et al.  RECTANGULAR SLOT ANTENNA WITH PATCH STUB FOR ULTRA WIDEBAND APPLICATIONS AND PHASED ARRAY SYSTEMS , 2005 .

[8]  G. Mazzarella,et al.  A direct computation of the frequency response of planar waveguide slot arrays , 2004, IEEE Transactions on Antennas and Propagation.

[9]  Guangjun Wen,et al.  Full-wave analysis of dielectric-loaded waveguide slot antennas including internal and external mutual coupling , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[10]  Mohammad A. Saed,et al.  Broadband CPW-Fed Planar Slot Antennas with Various Tuning Stubs , 2006 .

[11]  S. Martynyuk.  Investigation and optimization of a waveguide slot antenna array by finite-difference time-domain method , 2000, Conference Proceedings 2000 International Conference on Mathematical Methods in Electromagnetic Theory (Cat. No.00EX413).