Single-feed multi-frequency multi-polarization antenna

摘要

An antenna capable of receiving both left-hand circularly polarized (LHCP) signals and right-hand circularly polarized (RHCP) signals, and outputting both signals on a single feed. The antenna includes two coplanar concentric patches. The inner patch is substantially square. The outer patch surrounds the inner patch to define a gap therebetween. A resonant parallel inductive/LC circuit interconnects the two patches. The circuit includes a plurality of printed traces within the gap and interconnecting the concentric patches. The gap and each trace function as an LC circuit.

主权项

1. An antenna comprising:
a first substantially planar, substantially square antenna element having at least one non-square corner; a second substantially planar, substantially square antenna element having at least one non-square corner, the second antenna element surrounding the first antenna element and defining a gap therebetween, the first and second antenna elements being substantially coplanar and substantially concentric; four inductors each interconnecting one side of the first antenna element and one side of the second antenna element; and a feed connected to the first antenna element, whereby the first antenna element resonates at a first frequency with a first circular polarization sense, and further whereby the first and second antenna elements together resonate at a second frequency with a second circular polarization sense.