Microstrip devices
First Claim
1. A method of tuning a microstrip device of the kind comprising a dielectric substrate and a planar electrically-conductive region on a surface of the substrate, wherein the frequency of tuning of the device is initially measured, and wherein a part at least of a surface of the device is thereafter coated by a silk-screen process with a plurality of layers of dielectric ink or paint, each of which layers has the same predetermined thickness, superimposed directly on top of one another so as thereby to increase the thickness of the dielectric coating in a plurality of equal steps thereby to reduce the frequency of tuning of the device progressively from its initially measured value to a desired final value.
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Accused Products
Abstract
A microstrip antenna or other microstrip device has a planar electrically-conductive region on the surface of a dielectric board. The device is tuned by silk-screen printing one or more layers of a dielectric ink/paint over the surface of the device. This produces layers of a predetermined thickness which each reduce the frequency of tuning of the device by a predetermined amount until the desired frequency is achieved.
138 Citations
6 Claims
- 1. A method of tuning a microstrip device of the kind comprising a dielectric substrate and a planar electrically-conductive region on a surface of the substrate, wherein the frequency of tuning of the device is initially measured, and wherein a part at least of a surface of the device is thereafter coated by a silk-screen process with a plurality of layers of dielectric ink or paint, each of which layers has the same predetermined thickness, superimposed directly on top of one another so as thereby to increase the thickness of the dielectric coating in a plurality of equal steps thereby to reduce the frequency of tuning of the device progressively from its initially measured value to a desired final value.
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3. A method of tuning a microstrip antenna of the kind comprising a dielectric substrate and a planar electrically-conductive region on a surface of the substrate, wherein the frequency of tuning of the antenna is initially measured, and wherein a part at least of a surface of the antenna is thereafter coated by a silk-screen process with a plurality of layers of dielectric ink or paint, each of the same predetermined thickness, superimposed directly on top of one another thereby to increase the thickness of the dielectric coating in steps so as to reduce the frequency of tuning of the antenna progressively from its initially measured value to a desired final value.
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4. A method of tuning a microstrip filter of the kind comprising a dielectric substrate and a planar electrically-conductive region on a surface of the substrate, wherein the frequency of tuning of the filter is initially measured, and wherein a part at least of a surface of the filter is thereafter coated by a silk-screen process with a plurality of layers of dielectric ink or paint, each of the same predetermined thickness, superimposed directly on top of one another so as thereby to increase the thickness of the ink or paint coating in steps and thereby reduce the frequency of tuning of the filter progressively from its initially measured value to a desired final value.
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5. A method of manufacture of a microstrip device comprising the steps of:
- providing a dielectric substrate having a surface thereon;
forming on said surface a planar electrically-conductive region;
measuring the frequency of tuning of the device so formed; and
thereafter coating by a silk-screen process a part at least of a surface of the device with a plurality of layers of dielectric ink or paint, each of the same predetermined thickness, superimposed directly on top of one another so as thereby to increase the thickness of the coating in steps and thereby reduce the frequency of tuning of the device progressively from its previously measured value to a desired lesser value.
- providing a dielectric substrate having a surface thereon;
Specification