Design of wideband small spiral antenna for SAR

Y. Iitsuka, C. N. Koyama, Kazunori Takahashi, M. Sato

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    5 Citations (Scopus)

    Abstract

    A design of a wideband small spiral antenna for SAR is proposed. First, to miniaturize the spiral size, characteristics of input impedance and axial ratio for equiangular and Archimedean spiral antennas are analyzed regarding the effects of substrate and spiral turn. It is found that the miniaturized 6-turn Archimedean spiral antenna on a FR-4 substrate which is 4.4 cm in diameter has the good characteristics over a frequency range of 3 GHz to 20 GHz. Second, by experimentally observing time domain radar characteristics, it is confirmed that a cavity 6.1 cm deep sufficiently filled with an EM absorber is effective to obtain clear radar signals. It is also found that leaving a space between Tx and Rx antennas is important to improve the power ratio of a reflected wave to a direct wave.

    Original languageEnglish
    Title of host publicationProceedings of the 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation, APCAP 2015
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages261-262
    Number of pages2
    ISBN (Electronic)9781479988969
    DOIs
    Publication statusPublished - 2016 Jan 6
    Event4th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2015 - Bali Island, Indonesia
    Duration: 2015 Jun 302015 Jul 3

    Publication series

    NameProceedings of the 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation, APCAP 2015

    Other

    Other4th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2015
    Country/TerritoryIndonesia
    CityBali Island
    Period15/6/3015/7/3

    Keywords

    • absorber
    • antenna miniaturization
    • spiral antenna
    • synthetic aperture radar
    • time-domain characteristics

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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