A Circularly Polarized Cavity Backed Stacked Patch Antenna for Wide Angle Beam Scanning Millimeter Wave Phased Array
This paper presents design and measurement of a circularly polarized cavity backed patch antenna for a low profile active electronically scanned array with a beam scanning capability over a wide angle. The proposed antenna comprises upper patches, a spacer, and pin fed lower patches to achieve low axial ratio across a wide angle of view and high efficiency. Each component is bonded without any screws, which enhances the manufacturability of the antenna and prevents degradation of the radiation pattern. A 16 element array is fabricated and measured. The measured pattern for co polarization agrees well with the simulated one, and scan loss is approximately 5.5 dB in the 70 deg directions. In addition, low axial ratio of approximately 4.5 dB is obtained even in the 70 deg directions.
2020 International Symposium on Antennas and Propagation (ISAP)