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Design of Dual Circular Polarized Wideband Stacked Patch Flat Panel Phased Array Antenna using Ka-band 5G Silicon RFICs in Beamforming Network

An 8×8 dual circularly polarized phased array antenna with very low cross-polarization that covers wideband (22.5-27.5 GHz) and offers broadside circular polarized (CP) realized gain of around 22-23 dBic is proposed. The radiating element consists of a square driven patch and a square parasitic patch placed over it, with two orthogonal feed points at the driven patch. In each 2×2 subarray unit of the 8×8 array, upper right and lower left radiating elements are mirrored with respect to a vertical plane for high cross-polarization suppression. A beamforming network utilizing Anokiwave RFICs that feed four radiating elements, will be employed to achieve beam scanning. The circular polarization is obtained when 90° time-phase difference is applied between two feed points of the patch using the RFICs. A suitable beamforming algorithm will be applied through SPI controller. The circular polarized beam scans till ±46°.