Patent ID: 8717242
Filing Date: 2014-05-06
Classification: H01Q

Abstract:
1. An antenna comprising: a first loop defining a first enclosed area and having a first phase center point defined by the geometric center point of the first enclosed area; a second loop coupled to the first loop and disposed substantially parallel to the first loop, the second loop defining a second enclosed area and a second phase center point defined by the geometric center point of the second enclosed area; and a third loop coupled to the first loop and the second loop and substantially parallel to the first loop, the third loop defining a third enclosed area and a third phase center point defined by the geometric center point of the third enclosed area; and a plurality of adjuster elements coupled to at least one of the first loop, the second loop, or the third loop to provide an adjustable loop and configured to expand or contract the enclosed area of the adjustable loop, wherein a line normal to the plane of the first loop passes through the first phase center point of the first loop, the second phase center point of the second loop, and the third phase center point of the third loop, and a current supplied to the antenna flows in a first polarity in the third loop and flows in a second polarity in the first loop and the second loop, the first and second polarities being opposite to each other wherein the plurality of adjuster elements comprises: