Conductive frequency selective surface utilizing arc and line elements
First Claim
1. An article having a communication window comprising:
- a substrate having a major surface, the major surface having a first portion to block out at least one predetermined wavelength of an electromagnetic spectrum and a second portion outlined by an imaginary boundary defined as an aperture, a frequency selective surface pattern within the aperture, the pattern defined by arrangement of at least one area that passes the at least one predetermined wavelength of the electromagnetic spectrum, defined as a passing area, and at least one 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 spaced arcuate break lines each break line having at least one passing area and at least one of the break lines having a different curvature than another one of the break lines, the break lines nested within one another with the break line having the largest curvature as the outermost break line of the plurality of break lines and the break line having the smallest curvature as the innermost break line of the plurality of arcuate break lines, wherein the plurality of break lines are arranged by decreasing curvature in a direction away from the outermost break line toward the innermost break line; and
an area between adjacent arcuate break lines of the plurality of arcuate break lines forming the blocking area.
5 Assignments
0 Petitions
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.
55 Citations
28 Claims
-
1. An article having a communication window comprising:
-
a substrate having a major surface, the major surface having a first portion to block out at least one predetermined wavelength of an electromagnetic spectrum and a second portion outlined by an imaginary boundary defined as an aperture, a frequency selective surface pattern within the aperture, the pattern defined by arrangement of at least one area that passes the at least one predetermined wavelength of the electromagnetic spectrum, defined as a passing area, and at least one 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 spaced arcuate break lines each break line having at least one passing area and at least one of the break lines having a different curvature than another one of the break lines, the break lines nested within one another with the break line having the largest curvature as the outermost break line of the plurality of break lines and the break line having the smallest curvature as the innermost break line of the plurality of arcuate break lines, wherein the plurality of break lines are arranged by decreasing curvature in a direction away from the outermost break line toward the innermost break line; and
an area between adjacent arcuate break lines of the plurality of arcuate break lines forming the blocking area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
Specification