LOW PROFILE DUAL FREQUENCY DIPOLE ANTENNA STRUCTURE
First Claim
1. An antenna, comprising:
- first dipole having first and second stripline radiating elements extending in opposite directions from a central feed point and along a first side of a generally rectangular outline of the antenna, the first dipole operable to be resonant at a first frequency;
second dipole having third and fourth stripline radiating elements extending in opposite directions from the central feed point and generally parallel to the first and second stripline radiating elements, the third and fourth stripline radiating elements generally following and staying within the rectangular antenna outline, and the second dipole operable to be resonant at a second frequency; and
a balun have a plurality of stripline segments and electrically coupled between the central feed point and a ground and extending generally parallel with the first and second dipoles and along the rectangular antenna outline.
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Accused Products
Abstract
An antenna includes a first dipole having first and second stripline radiating elements extending in opposite directions from a central feed point and along a generally rectangular outline of the antenna. The first dipole is operable to be resonant at a first frequency. The antenna also includes a second dipole having third and fourth stripline radiating elements extending in opposite directions from the central feed point and generally parallel to the first and second stripline radiating elements. The third and fourth stripline radiating elements generally follow and stay within the rectangular antenna outline. The second dipole is operable to be resonant at a second frequency. The antenna also includes a stripline balun electrically coupled to the central feed point and extending generally parallel with the first and second dipoles and along the rectangular antenna outline.
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Citations
30 Claims
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1. An antenna, comprising:
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first dipole having first and second stripline radiating elements extending in opposite directions from a central feed point and along a first side of a generally rectangular outline of the antenna, the first dipole operable to be resonant at a first frequency;
second dipole having third and fourth stripline radiating elements extending in opposite directions from the central feed point and generally parallel to the first and second stripline radiating elements, the third and fourth stripline radiating elements generally following and staying within the rectangular antenna outline, and the second dipole operable to be resonant at a second frequency; and
a balun have a plurality of stripline segments and electrically coupled between the central feed point and a ground and extending generally parallel with the first and second dipoles and along the rectangular antenna outline. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An antenna structure, comprising:
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a generally rectangular outline having a width, W, and a length, L, and a center axis bisecting the length of the rectangular outline;
a central feed point lying on the center axis of the rectangular outline;
first dipole coupled to the central feed point having first and second radiating elements extending opposite one another along the length of the rectangular outline for a total length less than L;
second dipole coupled to the central feed point having third and fourth radiating elements extending opposite one another along the length of the rectangular outline for a length equal to L, the third and fourth radiating elements further comprising short perpendicular segments extending along the width of the rectangular outline operable to extend a total length of third and fourth radiating elements to a predetermined desired length, the third and fourth radiating elements generally staying within the rectangular outline; and
a balun formed by stripline segments coupled to the central feed point, the balun stripline segmenets forming a narrow channel having a generally inverse T configuration. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of forming an antenna structure, comprising:
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defining a generally rectangular outline having a width, W, and a length, L, and a center axis bisecting the length of the rectangular outline;
providing a central feed point lying on the center axis of the rectangular outline;
forming a first dipole coupled to the central feed point having first and second radiating elements extending opposite one another along the length of the rectangular outline for a total length less than L;
forming a second dipole coupled to the central feed point having third and fourth radiating elements extending opposite one another along the length of the rectangular outline for a length equal to L, the third and fourth radiating elements further comprising short perpendicular segments extending along the width of the rectangular outline operable to extend a total length of third and fourth radiating elements to a predetermined desired length, the third and fourth radiating elements generally staying within the rectangular outline; and
forming a balun having stripline segments coupled to the central feed point and forming a narrow channel therebetween. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification