An Alternating-Phase Fed Single-Layer Slotted Waveguide Array with a Sector Shaped Beam for Millimeter-Wave Radar Applications

• KIMURA Yuichi

  Department of Electrical and Electronic Systems, Saitama University

• SENGA Atsuo

  Research and Development Center, The Nippon Signal Co., Ltd.

• SAKAI Masayoshi

  Research and Development Center, The Nippon Signal Co., Ltd.

• HANEISHI Misao

  Department of Electrical and Electronic Systems, Saitama University

Abstract

This paper presents design of an alternating-phase fed single-layer slotted waveguide array for a sector shaped beam in the E-plane radiation pattern. A sector beam pattern is very effective for radar applications for detecting obstacles in a certain angular range without mechanical or electronic scanning. The sector shaped beam with 13 degree beam width is synthesized by a cascade of T-junctions in the feed waveguide which excite the radiating waveguides with a longitudinal shunt slot array. In order to realize the required excitation distribution of the radiating waveguides for the sector shaped beam, 30 T-junctions with symmetrical arrangement are designed by tuning a width of the coupling window, an offset of the window, and a width of the feed waveguide cascaded to the subsequent T-junction, respectively. Design and measurement are performed in 60GHz band. The prototype antenna assembles easily; the slotted plate is just tacked on the groove feed structure and is fixed by screws at the periphery, which is the key advantage of the alternating-phase fed arrays. The measured sector pattern with low sidelobe level agrees well with the predicted one. Validity of the sector beam design as well as the performance of the alternating-phase fed array is confirmed by the measurement.

Journal

• IEICE Trans. Electron., C

  IEICE Trans. Electron., C 90 (9), 1801-1806, 2007-09-01

  The Institute of Electronics, Information and Communication Engineers

Keywords

• alternating-phase
• slotted waveguide array
• sector shaped beam
• millimeter wave
• planar antenna

Details

• CRID: 1570854177591203840
• NII Article ID: 110007538944
• NII Book ID: AA10826283
• ISSN: 09168524
• Text Lang: en
• Data Source:
  • CiNii Articles