Conductive frequency selective surface utilizing arc and line elements
First Claim
30. An article having a communication window comprising:
- a substrate having a major surface, the major surface having a portion to block out at least one predetermined wavelength of an electromagnetic spectrum and a portion of the major surface outlined by an imaginary boundary defined as an aperture, the aperture having a frequency selective surface pattern defined by an area that passes the at least one predetermined wavelength of the electromagnetic spectrum, defined as a passing area, and an area that blocks out the at least one predetermined wavelength of the electromagnetic spectrum, defined as a blocking area, wherein the frequency selective surface pattern comprises;
a plurality of columns, each column having a plurality of passing areas separated by blocking areas, each passing area having a perimeter with a blocking area within the perimeter, and each of the columns are separated by a blocking area.
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Accused Products
Abstract
An electrically conductive coating of an automotive heatable windshield has a communication window having an enhanced frequency selective surface having arranged passing areas (uncoated areas) and blocking areas (coated areas) to pass and block, respectively, predetermined wavelengths of the electromagnetic spectrum. In one nonlimiting embodiment, the frequency selective surface includes a pattern having a first plurality of arcuate break lines on one side of a dividing break line and a second plurality of arcuate break lines on the other side of the dividing break line. An elongated continuous blocking area is between adjacent break lines. The arcuate break lines of a group are nested within one another with the arcuate break line having the largest radius of curvature adjacent the dividing break line. The break lines each have alternating blocking and passing areas. In another embodiment, the enhanced frequency selective surface has a plurality columns spaced from one another by a continuous elongated blocking area. Each of the columns includes passing areas with each of the passing areas have a perimeter with a blocking area in the perimeter spaced from the perimeter. The perimeters of the passing areas contact one another with the blocking area of adjacent passing areas spaced from one another. The elongated blocking area between the break lines and columns extend to the perimeter of the communication window. In this manner current passing through the coating, passes through the communication window to eliminate hot and cold spots around and within the perimeter of the communication window.
90 Citations
46 Claims
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30. An article having a communication window comprising:
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a substrate having a major surface, the major surface having a portion to block out at least one predetermined wavelength of an electromagnetic spectrum and a portion of the major surface outlined by an imaginary boundary defined as an aperture, the aperture having a frequency selective surface pattern defined by an area that passes the at least one predetermined wavelength of the electromagnetic spectrum, defined as a passing area, and an area that blocks out the at least one predetermined wavelength of the electromagnetic spectrum, defined as a blocking area, wherein the frequency selective surface pattern comprises;
a plurality of columns, each column having a plurality of passing areas separated by blocking areas, each passing area having a perimeter with a blocking area within the perimeter, and each of the columns are separated by a blocking area. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 46)
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- 42. The article according to claim 42, wherein the blocking area between the columns is oriented in the direction of current flow between the bus bars.
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43-1. The article according to claim 44, wherein an outer major surface of one of the glass sheets includes a hydrophobic coating.
Specification