A multi-layer gap waveguide array antenna suitable for manufactured by die-sink EDM
Paper in proceeding, 2016

In this paper, a multilayer wideband slot array antenna is presented for high gain applications at V-band. The proposed antenna consists of three unconnected metal layers based on the recently introduced gap waveguide technology. A 2×2 cavity-backed slot subarray is fed by a ridge gap waveguide corporate distribution network. The subarray is optimized to have wide bandwidth and low grating lobes in an infinite array environment. A simple slot-tilting method is used to fulfill the radiation pattern requirement of the ETSI 302 standard for fixed radio links. A prototype consisting of 16×16 slots is manufactured by die-sink Electric Discharge Machining (EDM), a fast modern planar-3D spark machining method. The measured antenna has a relative bandwidth of 18% with input reflection coefficient better than -10 dB, and the radiation patterns satisfy the ETSI 302 standard co-polar sidelobe envelope over 56-67 GHz frequency band. The measured total aperture efficiency is over most of the frequency band better than 80%.

gap waveguide

slot array antenna


high efficiency

millimeter wave


Abbas Vosoogh

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Per-Simon Kildal

Chalmers, Signals and Systems, Communication, Antennas and Optical Networks

Vessen Vassilev

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

2016 10th European Conference on Antennas and Propagation, EuCAP 2016

7481259- 7481259
978-8-8907-0186-3 (ISBN)

Areas of Advance

Information and Communication Technology

Subject Categories

Communication Systems

Electrical Engineering, Electronic Engineering, Information Engineering





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