Planar dual-frequency array antenna
First Claim
1. A planar antenna assembly for receiving and transmitting electromagnetic radiation in two frequency bands, said planar antenna assembly comprising, in a layered formation, first and second planar array antenna units, said first planar array antenna unit operating in a low frequency band and said second planar array antenna unit operating in a high frequency band, said first planar array antenna unit being the top planar array antenna unit and said second planar array antenna unit being the bottom planar array antenna unit;
- said first planar array antenna unit comprising at least one dielectric plate having front and rear faces, at least one planar array of patches having a plurality of patches, a feed array having a plurality of feeds and a ground plane;
each feed of said feed array being coupled to a respective one of said patches of said at least one planar array of patches;
each patch of said at least one planar array of patches being resonant to frequencies in said low frequency band and transparent to frequencies in said high frequency band;
said ground plane being reflective to frequencies in said low frequency band and transparent to frequencies in said high frequency band;
said second planar array antenna unit comprising at least one dielectric plate having front and rear faces, a ground plane, at least one planar array of patches having a plurality of patches and a feed array having a plurality of feeds, each feed of said feed array being coupled to a respective one of said patches of said at least one planar array of patches.
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Accused Products
Abstract
A dual-frequency array antenna having an essentially planar structure with electronic beam steering capability in both a low and high frequency band independently of each other, constructed, in a layered formation, from a top planar array antenna unit operating in the low frequency band and a bottom planar array antenna unit operating in the high frequency band. The top planar array antenna is transparent to frequencies in the high frequency band.
67 Citations
28 Claims
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1. A planar antenna assembly for receiving and transmitting electromagnetic radiation in two frequency bands, said planar antenna assembly comprising, in a layered formation, first and second planar array antenna units, said first planar array antenna unit operating in a low frequency band and said second planar array antenna unit operating in a high frequency band, said first planar array antenna unit being the top planar array antenna unit and said second planar array antenna unit being the bottom planar array antenna unit;
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said first planar array antenna unit comprising at least one dielectric plate having front and rear faces, at least one planar array of patches having a plurality of patches, a feed array having a plurality of feeds and a ground plane; each feed of said feed array being coupled to a respective one of said patches of said at least one planar array of patches; each patch of said at least one planar array of patches being resonant to frequencies in said low frequency band and transparent to frequencies in said high frequency band; said ground plane being reflective to frequencies in said low frequency band and transparent to frequencies in said high frequency band; said second planar array antenna unit comprising at least one dielectric plate having front and rear faces, a ground plane, at least one planar array of patches having a plurality of patches and a feed array having a plurality of feeds, each feed of said feed array being coupled to a respective one of said patches of said at least one planar array of patches. - 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)
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Specification