Pattern Reconstruction for Polarimetric Phased Array Antenna by Efficient Beam Measurement

To reduce the pattern measurement cost of the polarimetric-phased array antenna (PPAA), this letter proposes a novel method to reconstruct the array pattern using that of beam positions fewer than the elements. The method is based on the induced reconstruction matrix, thereby estimating the pattern of any beam position within the scanning range. Our approach has low reconstruction error for both copolarization and cross-polarization patterns while being valid for the beam positions in a wide range. A 6 × 6 dual-polarized microstrip patch array is designed to verify the effectiveness of the method. The near-field measurement of a 4 × 4 microstrip patch array confirms that our method could not only effectively reconstruct an approximate pattern meeting the actual requirements, but also proportionally reduce the pattern measurement cost of the PPAA.