Planar loop antenna system
First Claim
1. A planar loop antenna system comprising:
- a planar loop antenna comprising;
a plurality of mutually coupled loops supported by a planar substrate and connected in series, said plurality of mutually coupled loops being arranged in a common rotation orientation;
said planar substrate comprising one or more parallel layers;
an exclusion zone interior to said planar loop antenna on said planar substrate, and said exclusion zone extending normal to a plane of said planar substrate through and including all said parallel layers of said planar substrate and circuitry mounted thereon;
said exclusion zone being free of conducting structure; and
at least one conducting structure interior to an inner boundary of said exclusion zone as determined by a projection of said at least one conducting structure and said exclusion zone on a plane parallel to said planar substrate, said at least one conducting structure mounted on or in proximity to said planar substrate.
1 Assignment
0 Petitions
Accused Products
Abstract
An inexpensive planar antenna fabricated as a plurality of parallel layers of multi turn spiral loops co-located with conductive material at the center of the loops, there being an exclusion zone free of conductive material between the innermost loop and the conductive material at the center. The conductive material may comprise circuit elements, for example batteries, amplifiers, antenna drivers or other functional elements as well as passive elements. In one embodiment, the loop traces may be staggered. In another embodiment, the loop traces are varied in width as a function of position within the loop cross section. In further embodiments, the planar form is integrated with additional orthogonal planar antennas substantially coplanar with the first planar antenna and having axes orthogonal to the first planar antenna and to one another. In further embodiments the exclusion zone is extended by design rules and confining routes in a circuit section. The antenna system may be configured as a three dimensional omnidirectional antenna and is well adapted for small form factor hand held and portable wireless applications.
238 Citations
25 Claims
-
1. A planar loop antenna system comprising:
-
a planar loop antenna comprising;
a plurality of mutually coupled loops supported by a planar substrate and connected in series, said plurality of mutually coupled loops being arranged in a common rotation orientation;
said planar substrate comprising one or more parallel layers;an exclusion zone interior to said planar loop antenna on said planar substrate, and said exclusion zone extending normal to a plane of said planar substrate through and including all said parallel layers of said planar substrate and circuitry mounted thereon;
said exclusion zone being free of conducting structure; andat least one conducting structure interior to an inner boundary of said exclusion zone as determined by a projection of said at least one conducting structure and said exclusion zone on a plane parallel to said planar substrate, said at least one conducting structure mounted on or in proximity to said planar substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A planar loop antenna system comprising:
-
a planar loop antenna comprising;
a plurality of mutually coupled loops supported by a planar substrate and connected in series, said plurality of mutually coupled loops being arranged in a common rotation orientation;
said planar substrate having at least two layers;wherein said plurality of mutually coupled loops comprise a plurality of metallic traces characterized by a width of each trace, a thickness of each trace, and a horizontal spacing between adjacent traces; said metallic traces forming multiple loops on each of at least two layers of said substrate and at least one loop is varied in width as a function of position within a cross section of said planar loop antenna. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
Specification