Abstract
A simplified ‘narrowband’ planar ultra-wideband modular antenna (PUMA) array with 30% fractional bandwidth is presented as a competitive alternative to patch antennas of similar build complexity. The new topology integrates the dipole elements and the PUMA plate on a single metal layer enabling double-sided printing on a single FR-4 type core. To benchmark the performance, infinite array simulation results are reported and compared to a dual-polarization probe fed patch array, of similar manufacturing complexity. They suggest that a simple ‘narrowband’ PUMA array achieves better orthogonal port isolation and cross-polarization levels than the probe fed patch array. The proposed design has a predicted VSWR < 2 at broadside and less than 3 at θ = 45° and orthogonal port isolation better than -15 dB in a 45° scan cone. Realized co-pol radiation efficiency is better than 85% at broadside and 70% at the worst-case scan plane in a θ = 45° scan cone over the 15-21GHz (30%) frequency band.
Published Version
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