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A 7–21 GHz Dual-Polarized Planar Ultrawideband Modular Antenna (PUMA) Array

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3 Author(s)
Holland, S.S. ; Electr. & Comput. Eng. Dept., Univ. of Massachusetts at Amherst, Amherst, MA, USA ; Schaubert, D.H. ; Vouvakis, Marinos N.

The design, fabrication, and measurement of a 16 × 16 dual-polarized planar ultrawideband modular antenna (PUMA) array operating over 7-21 GHz (3:1 bandwidth) are presented. The array is comprised of tightly coupled dipoles printed on a grounded dielectric substrate and are excited by an unbalanced feeding scheme that eliminates external wideband baluns and feed organizers. The array can be assembled modularly, where each low-profile, fully planar, low-cost tile is fabricated using standard multilayer microwave PCB techniques. A unique solderless, modular interconnect mates the array to a dilation fixture that facilitates measurements using standard surface-mount assembly (SMA) connectors and terminations. After presenting the most critical design trends, simulation results of the final array in infinite, infinite × finite, and finite × finite models are compared with measurements. This prototype array exhibits a measured active VSWR <; 2.1 and close to ideal gain at broadside, and VSWR <; 2.8 with low cross-polarization out to θ = 45° in all planes, showing close agreement with simulations.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 10 )