Electromagnetically coupled printed-circuit antennas having patches or slots capacitively coupled to feedlines
First Claim
1. A method of forming microstrip antennas, comprising the following steps:
- (i) providing a feed network board having a plurality of feedlines which are impedance matched with other microstrip antenna elements;
(ii) providing a feeding element board having a plurality of feeding elements which are impedance matched with said feedlines;
(iii) providing a radiating element board having a plurality of radiating elements which are impedance matched with said feeding elements and said feedlines;
(iv) contactlessly coupling said feed network board to said feeding element board; and
(v) contactlessly coupling said feeding element board to said radiating element board.
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Accused Products
Abstract
A printed-circuit antenna array having broadband linear polarization, and circular polarization with high polarization purity, feedlines of the array being capacitively coupled to feeding elements at a single feedpoint or at multiple feedpoints, the feeding elements in turn being electromagnetically coupled to corresponding radiating elements. The radiating elements may be patches, disposed on a dielectric board which is contactlessly coupled to another board containing the feeding elements, in accordance with a first embodiment of the invention. Alternatively, the radiating elements may be slots, formed by an absence of material in ground planes which are formed on the same dielectric board as the feeding elements. Still further, both radiating patches and radiating slots may be used. The exclusively contactless coupling enables simple, inexpensive multilayer manufacture.
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Citations
29 Claims
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1. A method of forming microstrip antennas, comprising the following steps:
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(i) providing a feed network board having a plurality of feedlines which are impedance matched with other microstrip antenna elements; (ii) providing a feeding element board having a plurality of feeding elements which are impedance matched with said feedlines; (iii) providing a radiating element board having a plurality of radiating elements which are impedance matched with said feeding elements and said feedlines; (iv) contactlessly coupling said feed network board to said feeding element board; and (v) contactlessly coupling said feeding element board to said radiating element board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A microstrip antenna, comprising:
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a plurality of feedlines; a plurality of feeding elements, each coupled in a contactless manner to at least a respective one of said plurality of feedlines, said feeding elements being impedance matched with said feedlines; and a plurality of radiating elements, each coupled in a contactless manner to a respective one of said plurality of feeding elements, wherein said feedlines are capacitively coupled to said feeding elements and said feeding elements are capacitively coupled to said radiating elements. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification