access icon free Metal-only Fresnel zone plate antenna for millimetre-wave frequency bands

© The Institution of Engineering and Technology
Received 14/04/2013, Accepted 16/11/2013, Revised 22/09/2013, Published 06/01/2014

A metal-only Fresnel zone plate antenna (FZPA) to operate at millimetre wave frequency bands is presented in this work. The proposed antenna is a very attractive alternative to parabolic reflectors and reflectarrays because of its several advantages such as low profile, low cost, easy to manufacture and lossless. A centre-fed Fresnel zone plate whose diameter is 300 mm has been designed and analysed at 75 GHz providing a gain of 44.29 dBi, an aperture efficiency of 48.42% and a cross-polarised level lower than −40 dB for the diagonal plane (ϕ = 45°). A second prototype has been designed and analysed from 54 to 68 GHz to evaluate the performance of the proposed antenna compared with an already published FZPA.

Inspec keywords: reflector antenna feeds; millimetre wave antennas; aperture antennas; reflectarray antennas; electromagnetic wave polarisation

Other keywords: cross-polarised level; frequency 54 GHz to 68 GHz; centre-fed Fresnel zone plate; frequency 75 GHz; millimetre wave frequency bands; aperture efficiency; parabolic reflectors; FZPA; metal-only Fresnel zone plate antenna; reflectarrays; efficiency 48.42 percent

Subjects: Antenna accessories; Single antennas; Electromagnetic wave propagation

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