Wideband sub-wavelength antenna
First Claim
1. A wideband antenna comprising:
- a planar conductive tab having a top edge, a tapered region and a bottom end wherein said top edge is wider than said bottom end and said tapered region lies between said top edge and said bottom end;
a planar conductive ground plane that is parallel with said conductive tab and located below said bottom end of said conductive tab, said ground plane having an upper edge that is aligned with said bottom end of said conductive tab; and
a transmission line connected to said bottom end of the planar conductive tab,wherein said top edge of said conductive tab is nominally 0.2 wavelengths wide and is located nominally 0.1 wavelengths from said upper edge of said ground plane, andwherein wavelength is a free space wavelength at a center frequency of operation.
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Abstract
A wideband antenna has a planar conductive tab, a planar ground plane and transmission line. The conductive tab is sub-wavelength in all dimensions and has a top edge that is wider than its bottom end. The width of the conductive tab tapers from the top edge to the bottom end. The ground plane is parallel with and located below the conductive tab. The wideband antenna of the present invention, called a tab monopole, is planar in form enabling it to be readily manufactured using standard printed circuit board methods and facilitating its integration with packages and radio frequency circuitry used to feed the antenna. Operational bandwidths in excess of 40% were realized by this wideband, sub-wavelength antenna.
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Citations
10 Claims
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1. A wideband antenna comprising:
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a planar conductive tab having a top edge, a tapered region and a bottom end wherein said top edge is wider than said bottom end and said tapered region lies between said top edge and said bottom end; a planar conductive ground plane that is parallel with said conductive tab and located below said bottom end of said conductive tab, said ground plane having an upper edge that is aligned with said bottom end of said conductive tab; and a transmission line connected to said bottom end of the planar conductive tab, wherein said top edge of said conductive tab is nominally 0.2 wavelengths wide and is located nominally 0.1 wavelengths from said upper edge of said ground plane, and wherein wavelength is a free space wavelength at a center frequency of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification