Method and system for controlling a modal antenna
First Claim
1. An antenna system, comprising:
- a modal antenna comprising a driven element and a parasitic element positioned proximate to the driven element, the modal antenna operable in a plurality of different modes, each mode associated with a different radiation pattern;
a radio frequency circuit; and
a transmission line coupling the radio frequency circuit to the modal antenna;
wherein the radio frequency circuit is configured to modulate a control signal onto an RF signal to generate a transmit signal for communication over the transmission line to control the antenna systemwherein the RF signal is defined within a first frequency band, and the control signal is defined within a second frequency band that is distinct from the first frequency band.
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Accused Products
Abstract
An antenna system is provided. In one example implementation, the antenna system may include a modal antenna that is operable in a plurality of different modes, and each mode may be associated with a different radiation pattern. The antenna system may include a tuning circuit configured to operate the modal antenna in the plurality of different modes. A transmission line may couple a radio frequency circuit to the modal antenna. The radio frequency circuit may be configured to modulate a control signal onto an RF signal using amplitude-shift keying modulation to generate a transmit signal for communication over the transmission line to the tuning circuit. The tuning circuit may be configured to demodulate the control signal such that the radio frequency circuit can adjust a mode of the modal antenna via the control signal. In some embodiments, the amplitude-shift keying modulation may include on-off keying modulation.
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Citations
20 Claims
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1. An antenna system, comprising:
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a modal antenna comprising a driven element and a parasitic element positioned proximate to the driven element, the modal antenna operable in a plurality of different modes, each mode associated with a different radiation pattern; a radio frequency circuit; and a transmission line coupling the radio frequency circuit to the modal antenna; wherein the radio frequency circuit is configured to modulate a control signal onto an RF signal to generate a transmit signal for communication over the transmission line to control the antenna system wherein the RF signal is defined within a first frequency band, and the control signal is defined within a second frequency band that is distinct from the first frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for controlling an antenna system:
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modulating, at a radio frequency circuit, a control signal onto an RF signal to generate a transmit signal; communicating the transmit signal via a single coaxial transmission line to a modal antenna comprising a driven element and a parasitic element positioned proximate to the driven element, the modal antenna operable in a plurality of different modes; demodulating, at a tuning circuit, the control signal to adjust a mode of the modal antenna via the control signal to control the antenna system; and controlling, from the radio frequency circuit, the antenna system via the control signal. - View Dependent Claims (17, 18)
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19. An antenna system, comprising:
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a modal antenna comprising a driven element and a parasitic element positioned proximate to the driven element, the modal antenna operable in a plurality of different modes, each mode associated with a different radiation pattern; a radio frequency circuit; and a transmission line coupling the radio frequency circuit to the modal antenna; wherein the radio frequency circuit is configured to modulate a control signal onto an RF signal to generate a transmit signal for communication over the transmission line to control the antenna system; wherein the transmit signal is associated with a first clock frequency, and wherein the tuning circuit is configured to synchronize a local clock frequency with the first frequency.
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20. An antenna system, comprising:
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a modal antenna comprising a driven element and a parasitic element positioned proximate to the driven element, the modal antenna operable in a plurality of different modes, each mode associated with a different radiation pattern; a radio frequency circuit; a transmission line coupling the radio frequency circuit to the modal antenna; a tuning circuit; wherein; the radio frequency circuit is configured to modulate a control signal onto an RF signal to generate a transmit signal for communication over the transmission line to control the antenna system; and the tuning circuit is configured to demodulate the control signal such that the radio frequency circuit can adjust a mode of the modal antenna via the control signal to control the antenna system.
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Specification