Light‐weight wideband spiral antenna with a two‐layer circular HIS reflector: TL‐CirHISR spiral antenna | Zendy

Tanabe Masahiro | Zendy; Nakano Hisamatsu | Zendy

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Light‐weight wideband spiral antenna with a two‐layer circular HIS reflector: TL‐CirHISR spiral antenna

Author(s) -

Tanabe Masahiro,

Nakano Hisamatsu

Publication year - 2020

Publication title -

iet microwaves, antennas and propagation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.555

H-Index - 69

eISSN - 1751-8733

pISSN - 1751-8725

DOI - 10.1049/iet-map.2019.0212

Subject(s) - spiral antenna , spiral (railway) , wideband , reflector (photography) , optics , antenna (radio) , physics , periscope antenna , antenna measurement , radiation pattern , coaxial antenna , telecommunications , engineering , light source , mechanical engineering

This study describes a light‐weight wideband spiral antenna that radiates a unidirectional beam. To realise a light‐weight antenna, a one‐layer thick high‐impedance surface reflector (HISR) for a reference spiral antenna is replaced by a two‐layer circular HISR (TL‐CirHISR). The TL‐CirHISR is made of fan‐shaped patches printed on a dielectric substrate. It is revealed that a voltage standing wave ratio (VSWR) of <2 and an axial ratio of <3 dB are obtained across a design frequency range of 3.2–10 GHz (a fractional bandwidth of ∼103%). A weight reduction of 50%, compared to the weight of the reference spiral antenna, is achieved. A prototype spiral antenna with the TL‐CirHISR is fabricated and measured to confirm the analysed antenna characteristics, with good agreement between analysed and measured results obtained.

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