Millimeter-Wave Microstrip-Line-Fed Broadband Waveguide Aperture Antennas

Shintaro YANO  Kunio SAKAKIBARA  Nobuyoshi KIKUMA  Hiroshi HIRAYAMA  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.1   pp.34-40
Publication Date: 2012/01/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.34
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010)
Category: Antennas
Millimeter-Wave Antenna,  Waveguide,  LTCC substrate,  

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Microstrip-line-fed broadband aperture antennas were developed in the millimeter-wave band. We have developed broadband microstrip-to-waveguide transitions to connect a microstrip line and a waveguide. The waveguide transmission line was replaced by a radiating waveguide with an aperture to compose a microstrip-line-fed aperture antenna. Two types of aperture antennas were developed. First, the microstrip substrate is fixed between the two metal plates of a waveguide with an aperture and a back-short waveguide. Second, both the microstrip feeding-line and the back-short waveguide are accommodated in the two-layer LTCC substrate. Broadband performance was achieved due to the potential of the transition. The characteristics of the developed antennas were evaluated by simulations and experiments in the millimeter-wave band.