Antenna System and Method for Full Duplex Wireless Transmission with Channel Phase-Based Encryption
First Claim
1. An apparatus comprising:
- a first active antenna element having a propagation characteristic;
a plurality of radio-frequency reflectors positioned around the first active antenna element;
a plurality of switchable radio-frequency reflectors positioned around the first active antenna element configured to perturb the propagation characteristic.
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Abstract
An antenna assembly includes a first active antenna element and a second active antenna element, each of which may be a dipole. A first set of independently-switchable radio-frequency reflectors are positioned around at least the first active antenna element. These first switchable radio-frequency reflectors may also be positioned around the second active antenna element. Alternatively, a second set of independently-switchable radio-frequency reflectors may be positioned around the second active antenna element. The switchable reflectors enable controlled perturbation of the communication channel between the antenna assembly and a remote communications node, enabling securely encrypted communications.
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Citations
20 Claims
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1. An apparatus comprising:
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a first active antenna element having a propagation characteristic; a plurality of radio-frequency reflectors positioned around the first active antenna element; a plurality of switchable radio-frequency reflectors positioned around the first active antenna element configured to perturb the propagation characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An antenna assembly comprising:
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a first active antenna element; a first plurality of switchable radio-frequency reflectors positioned around at least the first active antenna element; a second active antenna element; a transceiver including transmit circuitry and receive circuitry; and a crossbar switch selectable between; a first state in which the crossbar switch connects the first active antenna element to the transmit circuitry and the second active antenna element to the receive circuitry; and a second state in which the crossbar switch connects the first active antenna element to the receive circuitry and the second active antenna element to the transmit circuitry. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method comprising:
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transmitting from a first device to a second device, a first signal using a first active antenna element; receiving at the first device, a second signal using a second active antenna element, the second signal generated by the second device in response to receiving the first signal; measuring at the first device a channel phase value based on a phase difference between the first signal and the second signal; receiving at the first device a third signal using the first active antenna element, the third signal generated by the second device; transmitting from the first device to the second device, a fourth signal using the second active antenna element, the fourth signal generated based on the received third signal. - View Dependent Claims (20)
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Specification