NULL FORMING IN CIRCULARLY POLARIZED ANTENNA PATTERNS USING REACTIVE LOADING OF MULTI-ARM SPIRAL ANTENNA

摘要

Embodiments of antennas and systems for null forming in circularly polarized antenna patterns using reactive loading of multi-arm spiral antennas are described. In an embodiment, the antenna comprises a substrate, an antenna structure coupled to a surface of the substrate, the antenna structure being disposed in a region defined by a first boundary and a second boundary, the second boundary being confined within the first boundary, and one or more feed ports coupled to the antenna structure proximate to at least one of the first boundary and the second boundary.