Dual-feed series microstrip patch array
First Claim
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1. A microstrip patch array antenna comprising:
- a first aperture-coupled patch antenna element;
a second aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element; and
a feed line coupled to the first antenna element and the second antenna element such that the first and second antenna elements are connected in series, the feed line having a first open-circuit stub positioned between the first antenna element and the second antenna element and a second open-circuit stub positioned on the second antenna element.
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Abstract
A sub-array of slot-coupled microstrip antennas fed using microstrip lines on an opposing substrate. Also provided is an omni-directional antenna comprised of six of the sub-arrays arranged in a hexagonal fashion. The gain of the antenna is ˜6 dB with a 3 dB elevation beam width of ˜30 degrees. The design provides constant beam angle over frequency, which is important for frequency-hopping applications, and the potential to add beam control to mitigate jamming in different sectors.
164 Citations
31 Claims
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1. A microstrip patch array antenna comprising:
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a first aperture-coupled patch antenna element; a second aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element; and a feed line coupled to the first antenna element and the second antenna element such that the first and second antenna elements are connected in series, the feed line having a first open-circuit stub positioned between the first antenna element and the second antenna element and a second open-circuit stub positioned on the second antenna element. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of providing symmetrical excitation of a microstrip patch array antenna about a central point, comprising:
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providing a microstrip patch array antenna comprising; a first aperture-coupled patch antenna element, a second aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element, a first feed line coupled to the first antenna element and the second antenna element such that the first and second antenna elements are connected in series, the first feed line having a first open-circuit stub positioned between the first antenna element and the second antenna element and a second open-circuit stub positioned on the second antenna element, a third aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element and the second antenna element, a fourth aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element, the second antenna element, and the third antenna element, and a second feed line coupled to the third antenna element and the fourth antenna element such that the third and fourth antenna elements are connected in series, the second feed line having a third open-circuit stub positioned between the third antenna element and the fourth antenna element and a fourth open-circuit stub positioned on the third antenna element; applying a first signal to the first feed line; and applying a second signal to the second feed line. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An antenna comprising:
at least two sub-arrays of microstrip patch antennas arranged such that each sub-array forms a single face of a multi-sided three-dimensional geometric shape, each of the at least two sub-arrays comprising; a first aperture-coupled patch antenna element, a second aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element, a first feed line coupled to the first antenna element and the second antenna element such that the first and second antenna elements are connected in series, the first feed line having a first open-circuit stub positioned between the first antenna element and the second antenna element and a second open-circuit stub positioned on the second antenna element, a third aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element and the second antenna element, a fourth aperture-coupled patch antenna element positioned in a single row arrangement with the first antenna element, the second antenna element, and the third antenna element, and a second feed line coupled to the third antenna element and the fourth antenna element such that the third and fourth antenna elements are connected in series, the second feed line having a third open-circuit stub positioned between the third antenna element and the fourth antenna element and a fourth open-circuit stub positioned on the third antenna element. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An antenna comprising:
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a first microstrip patch antenna element having a coupling slot and positioned such that the first antenna element forms a first face of a multi-sided three-dimensional geometric shape; a first feed line forming an open-circuit stub on the first antenna element; a second microstrip patch antenna element having a coupling slot and positioned such that the second antenna element forms a second face of the multi-sided three-dimensional geometric shape; and a second feed line forming an open-circuit stub on the second antenna element. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification