High-Efficiency and Wideband Aperiodic Array of Uniformly Excited Slotted Waveguide Antennas Designed Through Compressive Sensing
Journal article, 2019

A uniformly excited slotted waveguide (WG) antenna array for point-to-point communication is presented. The European Telecommunications Standards Institute class-II sidelobe level requirements are satisfied in all planes at almost all frequencies by the aperiodic arrangement of several parallel ridge WGs in the E-plane, each with a different number of equally spaced radiating slots along the H-plane. Both the optimal separation and number of slots per WG are determined through a compressive sensing approach. This results in 160 slots organized in 16 columns offering 29 dBi peak gain at Ka-band. A dedicated 16-way analog beamforming network is designed to provide the optimal nonuniform and in-phase excitation of the 16 WG channels, thereby compensating for the variable number of slots per column and the phase difference due to the E-plane aperiodicity. The measurements confirm the simulated reflection coefficient and radiation pattern characteristics, as well as the high aperture efficiency (70%-90%) over a 13.6% relative bandwidth (27.5-31.5 GHz) and <2 dB gain variation over 3.75 GHz (12.7%).

Aperiodic array

slotted waveguide (WG) antenna

irregular array

compressive sensing

Author

Lei Shi

China Academy of Space Technology

Carlo Bencivenni

Chalmers, Electrical Engineering, Communication and Antenna Systems, Antennas

Rob Maaskant

Technische Universiteit Eindhoven

Chalmers, Electrical Engineering, Communication and Antenna Systems

Johan Wettergren

Ruag Space AB

Johan Pragt

Netherlands Institute for Radio Astronomy (ASTRON)

Marianna Ivashina

Chalmers, Electrical Engineering, Communication and Antenna Systems, Antennas

IEEE Transactions on Antennas and Propagation

0018-926X (ISSN)

Vol. 67 5 2992-2999 8606072

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/TAP.2019.2891647

More information

Latest update

5/20/2019