True omni-directional antenna
First Claim
1. An antenna for use in a wireless appliance, comprising:
- a conducting surface having a length and a width, wherein the length is greater than the width and the width is less than a quarter of a first wavelength which is an operating wavelength of the antenna;
a dielectric slit having a slit length portion oriented along the length, the slit forming two lips on the conducting surface;
the slit length portion extending along the length to provide mouth that opens out of the conducting surface;
a feed-point element connecting the two lips.
1 Assignment
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Accused Products
Abstract
An antenna and a method for using the antenna in a wireless appliance are provided. The antenna includes a conducting surface having a length and a width; a dielectric slit having a slit length portion oriented along either the length or the width, the slit forming two lips on the conducting surface; the slit having an opening on one of the length and the width, the opening having a flare size; a feed-point element connecting the two lips; wherein the dimensions of the length, the width, the slit length portion, and the flare size are smaller than an effective propagation wavelength of the RF radiation in the antenna. An antenna including a conducting surface having a conductive plate with a plate area defined by a plate perimeter overlaying a portion of a conducting surface is also provided. A method to provide an antenna as above is also disclosed.
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Citations
24 Claims
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1. An antenna for use in a wireless appliance, comprising:
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a conducting surface having a length and a width, wherein the length is greater than the width and the width is less than a quarter of a first wavelength which is an operating wavelength of the antenna; a dielectric slit having a slit length portion oriented along the length, the slit forming two lips on the conducting surface; the slit length portion extending along the length to provide mouth that opens out of the conducting surface; a feed-point element connecting the two lips. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18, 19, 20, 21)
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- 14. The antenna of 12 wherein the said condition holds for each of (A), (B) and (C).
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22. An antenna structure for use in a wireless appliance, comprising:
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a first antenna for providing a gain with respect to electromagnetic (“
EM”
) radiation polarized in an XY plane of a Cartesian XYZ frame; anda second antenna for providing a gain with respect to EM radiation polarized along the Z axis of the Cartesian XYZ frame; wherein the first and second antennas share a conductive surface extending in the XY plane, wherein the conductive surface is for providing coupling to EM radiation polarized in the XY plane; wherein the second antenna comprises a conductive plate spaced from the conductive surface along the Z axis, the conductive plate having a contact portion connected to the conductive surface; wherein; in a projection onto the XY plane along the Z axis, the conductive plate lies entirely within the conductive surface; the second antenna structure comprises a gap between the conductive surface and the conductive plate, the gap having a width along the Z axis to provide a gain with respect to EM radiation polarized along the Z axis in the gap; the second antenna is operable to provide coupling to EM radiation polarized along the Z axis in the gap; the antenna structure comprises one or more feed-point elements connected to the conductive plate and to the conductive surface. - View Dependent Claims (23, 24)
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Specification