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US 12,706,388 B2Granted
Multi-layer frequency-selective surface
AssigneeSony Group Corporation
InventorsKun Zhao, Fredrik Rusek, Olof Zander, Erik Bengtsson, Jose Flordelis
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Abstract
A multi-layer frequency selective surface is disclosed that exhibits a frequency response having a passband and one or more stopbands.
Claims14
A multi-layer frequency-selective surface, comprising:
- a first layer comprising a first array of first metallic elements,
- a second layer comprising a second array of second metallic elements, adjacent ones of the second metallic elements being distanced by gaps from each other, and
- a third layer comprising a third array of third metallic elements,
- wherein the second layer is arranged in-between and adjacent to the first layer and the third layer;
- wherein the first array and third array comprise of a metallic filling fraction of at least 70% and the second array comprises of a metallic filling fraction of less than 15%;
- wherein a frequency response of the multi-layer frequency-selective surface comprises at least one stop band and a passband offset from each other in frequency domain;
- and
- wherein the second layer includes gaps in between adjacent ones of the second metallic elements configured to shift the frequency of the at least one stop band or the at least one passband without affecting the other.
5 more elements
A computer-implemented method, comprising:
- obtaining control data indicative of a frequency of a stopband;
- and
- controlling a voltage source to bias tunable capacitors arranged in gaps between elements of an array of a frequency-selective surface;
- wherein the array of a frequency-selective surface is a layer of a multi-layer frequency selective surface,
- wherein the multi-layer frequency selective surface comprises a frequency response of the multi-layer frequency-selective surface having the stopband and a passband offset from each other in frequency domain;
- wherein the tunable capacitors are arranged in a series connection and are configured to shift the frequency of the stopband without affecting the frequency of a passband.
3 more elements
Dependencies are inferred from the claim text.