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A 1-to-8 Fully Modular Stacked SIW Antenna Array for Millimeter-Wave Applications

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This paper presents a vertically stacked SIW antenna array that enables different array configurations with the minimum number of SIW layers. This achievement lies in the modular feature offered by the proposed design. Specifically, 4 distinct array configurations can be produced with only 3 different design of SIW layers. Depending on the number of SIW layers employed in the stacked antenna, the directivity in the E-plane of radiation is modified. To obtain an equal and in-phase power distribution among the array elements, H- and E-plane corporate feeding networks are efficiently implemented in each array configuration. Array configurations of 1, 2, 4 and 8 radiating layers are offered by the proposed modular array, where each radiating layer is formed by 8 H-plane SIW horn antennas. The simulated directivity for the array configurations ranges from 15.8 dBi to 23.8 dBi and the main beam direction remains fixed along the operating frequency band. The array design has been manufactured and proper agreement between simulated and measured results are observed. The measured impedance bandwidth in all the array configurations is from 35 GHz to 41 GHz (15.79% bandwidth) with a reduction in the E-plane beamwidth as the number of radiating layers increases.

Funding

PID2020-112545RB-C54

B-TIC-402-UGR18

A-TIC-608-UGR20

P18.RT.4830

PYC20-RE-012-UGR

FPU20/00256

FPU18/01965

History

Email Address of Submitting Author

cleofas@ugr.es

ORCID of Submitting Author

0000-0002-9347-287X

Submitting Author's Institution

University of Granada

Submitting Author's Country

Spain