Microstrip patch antenna with omni-directional radiation pattern
First Claim
1. A substantially omni-directional radiating antenna comprised of a pair of antenna elements, each antenna element having a substantially hemispherical radiation pattern and an associated ground plane, said ground planes being substantially adjacent to their associated antenna element, means for feeding said antenna elements so that their radiation patterns add constructively at their ground planes and means for feeding each of said antenna elements for opposite senses of circular polarization such that the fields are in-phase across the ground planes.
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Accused Products
Abstract
A microstrap patch antenna with a substantially omni-directional radiation pattern includes an upper hemisphere microstrip patch radiator working against a ground plane and a lower hemisphere microstrip patch radiator working against a ground plane, the ground planes being oriented in close proximity and spaced apart from each other. One of the radiators is excited in left hand circular polarization and the other in right hand circular polarization such that their fields add constructively across their ground planes to achieve an omni-directional radiation pattern.
47 Citations
13 Claims
- 1. A substantially omni-directional radiating antenna comprised of a pair of antenna elements, each antenna element having a substantially hemispherical radiation pattern and an associated ground plane, said ground planes being substantially adjacent to their associated antenna element, means for feeding said antenna elements so that their radiation patterns add constructively at their ground planes and means for feeding each of said antenna elements for opposite senses of circular polarization such that the fields are in-phase across the ground planes.
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8. The antenna of further comprising a modal shorting pin extending between each microstrip patch radiator and its associated ground plane.
- 9. A substantially omni-directional radiating antenna comprising a pair of microstrip patch radiators, each of said radiators being mounted to an associated ground plane, said ground planes being oriented in close proximity but spaced apart from each other, means to excite each of said radiators so that their fields add constructively at their ground planes and means for feeding one of said radiators for right hand circular polarization and the other of said radiators for left hand circular polarization.
- 12. A substantially omni-directional radiating antenna comprising a pair of radiating elements, each of said elements having an associated ground plane, and means to excite said elements in opposite senses of circular polarization.
Specification