ELETRONICALLY STEERED ANTENNA SUBSTRATE EMBEDDED RESONATOR FILTERS
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United States of America
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Issued Date -
Jan 9, 2025
app pub date -
Jul 5, 2023
filing date -
Jul 5, 2023
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Abstract
An ESA antenna includes a layer of filters between the layer of radiating elements and the ground layer. The filter layer obviates certain post processing steps. The filters define a passband at the operating range of the antenna and a stopband defined to prevent crosstalk or reduce known external interference. Each filter includes alternating cells of a resonator cell formed by two split ring resonators and a resonator cell formed by a complementary split ring resonator and a complementary patch/stub. A particular implementation of the filter defines an operating range around 23 gigahertz with a passband to stopband transition of less than 500 megahertz. Vias may connect the filter layer to a surface component layer with beamforming integrated circuits, bypassing the routing layer.
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