Research

• Single-layer Slotted Waveguide Array Antenna with Baffles
  
  Research Topics
  This research presents the formulation for the evaluation of external coupling in the alternating-phase feed single-layer slotted waveguide array antenna with baffles by using the Spectrum of Two-Dimensional Solutions (S2DS) method. A one-dimensional slot array is extracted from the array by assuming the periodicity in transversal direction and introducing the perfect electric conductors in the external region. The uniform excitation over the finite array is synthesized iteratively to demonstrate the fast and accurate results by S2DS. A unit design model with the baffle is introduced to determine the initial parameters of the slot pair which accelerate the iteration. Experiments at 25.3GHz demonstrate good uniformity of the aperture field distribution as well as the effects of the baffles. The directivity is 32.7 dB which corresponds to the aperture efficiency 90.5 % and the reflection is below -15.0 dB over 1.3 GHz.
  
  1. Takehito Suzuki, Jiro Hirokawa, Makoto Ando, Analysis and Uniform Design of a Single-layer Slotted Waveguide Array Antenna with Baffles, ’’ IEICE Trans. Commun.,vol.E92-B, no.01, pp. 150-158, Jan. 2009.
  2. Takehito Suzuki, Jiro Hirokawa, Makoto Ando, ‘‘Analysis and Uniform Design of a Slotted Waveguide Array with Baffles,’’ in Proc. IEICE General Conf. (in Japanese), B-1-172, 3/18-3/21, 2008.
  3. Takehito Suzuki, Jiro Hirokawa, Makoto Ando, ‘‘Analysis and Uniform Design of a Single-layer Slotted Waveguide Array Antenna with Baffles,’’ IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting, San Diego, USA, July 5-12, 2008.
  4. Takehito Suzuki, Jiro Hirokawa, Makoto Ando, ‘‘Radiation Power Variation in a Co-Phase Feed Slotted Waveguide Array with Baffles,’’EMTS2007-International URSICommission B-Electromagnetic Theory Symposium, O1-53, EMTS252, Ottawa, ON, Canada, July 26-28, 2007.
  5. Takehito Suzuki, Jiro Hirokawa, Makoto Ando, ‘‘Effects of the baffle height on radiation power in a two-dimensional waveguide-slot array antenna,’’ Technical Report of IEICE, A・P2007-1, pp.1-6, Apr. 2007.
  6. Takehito Suzuki, Takuichi Hirano, Jiro Hirokawa, Makoto Ando, ‘‘Analysis of a Slotted Waveguide Array with Baffles in Terms of a Spectrum of Two-Dimensional Solutions,’’ IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting, Session: 483.3, pp.3913-3916, Albuquerque, NM, USA, July 9-14, 2006.
  7. Takehito Suzuki, Takuichi Hirano, Jiro Hirokawa, Makoto Ando, ‘‘Analysis of a Slotted Waveguide Array with Baffles in terms of a Spectrum of Two-Dimensional Solutions,’’ in Proc. IEICE General Conf. (in Japanese), B-1-74, 3/24-3/27, 2006.
  8. Takehito Suzuki, John C. Young, Takuichi Hirano, Jiro Hirokawa, Makoto Ando, ‘‘Analysis of a Waveguide Slot Antenna with Baffles Including Periodicity in the Transverse Direction,’’ Technical Report of IEICE, A・P2005-7, pp.35-40, Apr. 2005.