High-Efficiency and Wideband Aperiodic Array of Uniformly Excited Slotted Waveguide Antennas Designed Through Compressive Sensing
- Resource Type
- Authors
- Johan Pragt; Marianna Ivashina; Rob Maaskant; Lei Shi; Johan Wettergren; Carlo Bencivenni
- Source
- IEEE Transactions on Antennas and Propagation, 67(5):8606072, 2992-2999. Institute of Electrical and Electronics Engineers
- Subject
- Beamforming
Physics
slotted waveguide (WG) antenna
Aperiodic array
Aperture
business.industry
compressive sensing
020206 networking & telecommunications
02 engineering and technology
Radiation pattern
Antenna array
Optics
Aperiodic graph
irregular array
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
Wideband
Reflection coefficient
business
Slotted waveguide
- Language
- ISSN
- 1558-2221
0018-926X
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