Low-profile frequency selective surface based device and methods of making the same
First Claim
1. A frequency selective surface-based (FSS-based) device for processing electromagnetic waves, comprising:
- a first and second frequency selective surface (FSS) having first and second primary resonant frequencies, respectively;
a high quality factor (Q) FSS having a lower primary resonant frequency relative to said first and second primary resonant frequencies, said high Q FSS interposed between said first and second FSS and having a loaded Q of at least thirty at said lower primary resonant frequency;
a first dielectric layer interposed between said first FSS and said high Q FSS; and
a second dielectric layer interposed between said second FSS and said high Q FSS.
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Abstract
A frequency selective surface-based (FSS-based) device (200) for processing electromagnetic waves providing at least a third-order response. The FSS-based device includes a first FSS (202), a second FSS (210), and a high quality factor (Q) FSS (206) interposed between the first and second FSSs. A first dielectric layer (204) and a second dielectric layer (208) separate the respective FSS layers. The first and second FSSs have first and second primary resonant frequencies, respectively. The high Q FSS has a lower primary resonant frequency relative to the first and second primary resonant frequencies. The overall electrical thickness of the FSS device can be <λ/10. The high Q FSS has a loaded quality factor of at least thirty at the lower primary resonant frequency.
30 Citations
19 Claims
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1. A frequency selective surface-based (FSS-based) device for processing electromagnetic waves, comprising:
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a first and second frequency selective surface (FSS) having first and second primary resonant frequencies, respectively; a high quality factor (Q) FSS having a lower primary resonant frequency relative to said first and second primary resonant frequencies, said high Q FSS interposed between said first and second FSS and having a loaded Q of at least thirty at said lower primary resonant frequency; a first dielectric layer interposed between said first FSS and said high Q FSS; and a second dielectric layer interposed between said second FSS and said high Q FSS. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system, comprising:
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a propelled object or vehicle; and a frequency selective surface based (FSS-based) device coupled to said propelled object or vehicle, said FSS-based device configured for processing electromagnetic waves and comprising a substrate having a surface layer; and a multi-layer frequency selective surface (FSS) structure disposed on said surface layer, said multi-layer FSS structure comprising a first FSS having a first primary resonant frequency, a second FSS having a second primary resonant frequency, a high quality factor (Q) FSS interposed between said first FSS and said second FSS, a first dielectric layer interposed between said first FSS and said high Q FSS, and a second dielectric layer interposed between said second FSS and said high Q FSS; wherein said high Q FSS has a lower primary resonant frequency relative to said first and second primary resonant frequencies and a loaded Q of at least thirty at said lower primary resonant frequency. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification