Low profile mobile satellite antenna
First Claim
1. A low profile antenna comprising an antenna element consisting of a single helical loop having multiple overlapping turns without a matching load at one end of the loop, said multiple overlapping turns being closely spaced so as to provide a sufficiently strong coupling between adjacent said overlapping turns of said helical loop to force the current in all of said overlapping turns to be in phase such that each turn of said helical loop behaves as a traveling-wave loop antenna.
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0 Petitions
Accused Products
Abstract
A low profile antenna with high gain at low elevations suitable for satellite communications consists of a helical loop with turns tightly spaced to provide a strong coupling therebetween. The pitch is typically 1 to 2 degrees. The helical loop behaves like a travelling-wave loop antenna.
14 Citations
19 Claims
- 1. A low profile antenna comprising an antenna element consisting of a single helical loop having multiple overlapping turns without a matching load at one end of the loop, said multiple overlapping turns being closely spaced so as to provide a sufficiently strong coupling between adjacent said overlapping turns of said helical loop to force the current in all of said overlapping turns to be in phase such that each turn of said helical loop behaves as a traveling-wave loop antenna.
- 11. A method of making a low profile antenna comprising the steps of forming a wire into a helical loop having a plurality of overlapping turns, and spacing said overlapping turns sufficiently closely to provide a sufficiently strong coupling between adjacent said overlapping turns to force the current in all said closely spaced turns to be in phase such that each turn of said helical loop behaves as a traveling-wave loop antenna.
Specification