Antenna system facilitating reduction of interfering signals
First Claim
1. An antenna system comprising:
- a surface scattering antenna including;
an electromagnetic waveguide structure;
a plurality of electromagnetic wave scattering elements distributed along the waveguide structure and operable in combination to produce a controllable radiation pattern;
a gain definition circuit configured to define a radiation pattern configured to receive a possible interfering signal transmitted within an operating frequency band of an associated antenna, the associated antenna having a field of view that includes a desired field of view and an undesired field of view, and the defined antenna radiation pattern having a field of view covering at least a portion of the undesired field of view of the associated antenna, wherein the undesired field of view includes the possible interfering signal, and the desired field of view includes a target signal; and
a correction circuit configured to reduce an influence of the received possible interfering signal in a contemporaneously received signal by the associated antenna.
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Abstract
Described embodiments include an antenna system and method. The antenna system includes a surface scattering antenna that has an electromagnetic waveguide structure and a plurality of electromagnetic wave scattering elements. The plurality of electromagnetic wave scattering elements are distributed along the waveguide structure, have a respective activatable electromagnetic response to a propagating electromagnetic wave, and produce a controllable radiation pattern. A gain definition circuit defines a radiation pattern configured to acquire a possible interfering signal. The defined antenna radiation pattern has a field of view covering at least a portion of an undesired field of view of an associated antenna. An antenna controller establishes the defined radiation pattern in the surface scattering antenna by activating the respective electromagnetic response of selected electromagnetic wave scattering elements. A correction circuit reduces an influence of the received possible interfering signal in a contemporaneously received signal by the associated antenna.
103 Citations
33 Claims
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1. An antenna system comprising:
a surface scattering antenna including; an electromagnetic waveguide structure; a plurality of electromagnetic wave scattering elements distributed along the waveguide structure and operable in combination to produce a controllable radiation pattern; a gain definition circuit configured to define a radiation pattern configured to receive a possible interfering signal transmitted within an operating frequency band of an associated antenna, the associated antenna having a field of view that includes a desired field of view and an undesired field of view, and the defined antenna radiation pattern having a field of view covering at least a portion of the undesired field of view of the associated antenna, wherein the undesired field of view includes the possible interfering signal, and the desired field of view includes a target signal; and a correction circuit configured to reduce an influence of the received possible interfering signal in a contemporaneously received signal by the associated antenna. - 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, 29)
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30. An antenna system comprising:
a surface scattering antenna including; an electromagnetic waveguide structure; a plurality of electromagnetic wave scattering elements distributed along the waveguide structure and operable in combination to produce a controllable radiation pattern; a gain definition circuit configured to define a radiation pattern configured to receive a possible interfering signal transmitted within an operating frequency band of an associated antenna, the associated antenna having a field of view that includes a desired field of view and an undesired field of view, and the defined antenna radiation pattern having a field of view covering at least a portion of the undesired field of view of the associated antenna, wherein the undesired field of view includes the possible interfering signal, and the desired field of view includes a target signal. - View Dependent Claims (31, 32)
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33. An antenna system comprising:
a surface scattering antenna including; an electromagnetic waveguide structure; a plurality of electromagnetic wave scattering elements distributed along the waveguide structure and operable in combination to produce a controllable radiation pattern, wherein the plurality of electromagnetic wave scattering elements have an inter-element spacing substantially less than a free-space wavelength of a highest operating frequency of the surface scattering antenna, and each electromagnetic wave scattering element of the plurality of electromagnetic wave scattering elements has a respective activatable electromagnetic response to a guided wave propagating in the waveguide structure; and a gain definition circuit configured to define a radiation pattern configured to receive a possible interfering signal transmitted within an operating frequency band of an associated antenna, the associated antenna having a field of view that includes a desired field of view and an undesired field of view, and the defined antenna radiation pattern having a field of view covering at least a portion of the undesired field of view of the associated antenna, wherein the undesired field of view includes the possible interfering signal, and the desired field of view includes a target signal.
Specification