Method for fabricating antenna structures having adjustable radiation characteristics
First Claim
1. Method for fabricating an antenna structure having adjustable radiation characteristics, the method comprising the steps of comprising:
- providing a frequency selective surface including a patterned layer of conducting material having electromagnetic properties that vary as a function of frequency;
positioning an antenna element proximate to the frequency selective surface to promote near field coupling of electromagnetic energy between the antenna element and the patterned layer of conducting material, when the antenna element is operated at a selected frequency; and
structuring the patterned layer of conducting material to have specific electromagnetic properties at the selected frequency of operation of the antenna element to obtain a predetermined adjustment of the radiation characteristics of the antenna structure.
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Abstract
The radiation properties and wave guiding properties of frequency selective surfaces are used in conjunction with closely spaced antenna elements to fabricate antenna structures having adjustable radiation characteristics. The direction, magnitude, and polarization of radiation patterns for such antenna structures can be adjusted by varying the texture or patterning of layers of conducting material forming the frequency selective surfaces. The invention enables the fabrication of low profile antenna structures that can easily be conformed or integrated into complex surfaces without sacrificing antenna performance.
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Citations
22 Claims
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1. Method for fabricating an antenna structure having adjustable radiation characteristics, the method comprising the steps of comprising:
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providing a frequency selective surface including a patterned layer of conducting material having electromagnetic properties that vary as a function of frequency;
positioning an antenna element proximate to the frequency selective surface to promote near field coupling of electromagnetic energy between the antenna element and the patterned layer of conducting material, when the antenna element is operated at a selected frequency; and
structuring the patterned layer of conducting material to have specific electromagnetic properties at the selected frequency of operation of the antenna element to obtain a predetermined adjustment of the radiation characteristics of the antenna structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification