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Ultra-Wideband Tapered Slot Antenna Arrays with Parallel-Plate Waveguides Satoshi YAMAGUCHI Hiroaki MIYASHITA Toru TAKAHASHI Masataka OTSUKA Yoshihiko KONISHI Publication IEICE TRANSACTIONS on Communications Vol.E93-B No.5 pp.1248-1255 Publication Date: 2010/05/01 Online ISSN: 1745-1345 DOI: 10.1587/transcom.E93.B.1248 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Antennas and Propagation Keyword: tapered slot antenna, parallel-plate waveguides, wideband antenna, array antenna, FDTD, Full Text: PDF(1.3MB)>>
Summary: Owing to their ultra-wideband characteristics, tapered slot antennas (TSAs) are used as element antennas in wideband phased arrays. However, when the size of a TSA is reduced in order to prevent the generation of a grating lobe during wide-angle beam scanning, the original ultra-wideband characteristics are degraded because of increased reflections from the ends of the tapered slot aperture. To overcome this difficulty, we propose a new antenna structure in which parallel-plate waveguides are added to the TSA. The advantage of this new structure is that the reflection characteristics of individual antenna elements are not degraded even if the width of the antenna aperture is very small, i.e., approximately one-half the wavelength of the highest operating frequency. In this study, we propose a procedure for designing the new antenna through numerical simulations by using the FDTD method. In addition, we verify the performance of the antenna array by experiments. | |||||
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