Closed loop aperture tunable antenna
AssigneeFuturewei Technologies, Inc.
InventorsPing Shi, Yonghua Wei
Life of this patent
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Abstract
An apparatus comprises a radio frequency (RF) antenna circuit; an antenna aperture tuning circuit; an antenna impedance measurement circuit; and a processor circuit electrically coupled to the tunable antenna aperture circuit and the impedance measurement circuit. The processor circuit is configured to: set the antenna aperture tuning circuit to an antenna aperture tuning state according to one or more parameters of an RF communication network; initiate an antenna impedance measurement; and change the antenna aperture tuning state to an antenna aperture tuning state indicated by the antenna impedance.
Claims17
An apparatus comprising:
- a radio frequency (RF) antenna circuit;
- an antenna aperture tuning circuit;
- an antenna impedance measurement circuit;
- and
- a processor circuit electrically coupled to the tunable antenna aperture circuit and the impedance measurement circuit, wherein the processor circuit is configured to execute computer instructions stored in memory to:
- set the antenna aperture tuning circuit to an antenna aperture tuning state according to one or more parameters of an RF communication network, wherein the one or more parameters of the RF communication network include a radio access technology (RAT) of the RF communication network, a channel of the RF communication network, or bandwidth of the RF communication network;
- recurrently initiate the measurement of antenna impedance according to a specified schedule to obtain an antenna impedance;
- and
- change the antenna aperture tuning state according to the determined antenna impedance.
A computer readable storage medium including instructions, that when performed by processing circuitry of an RF communication device, cause the RF communication device to perform acts comprising:
- setting an antenna aperture tuning state according to one or more parameters of the RF communication network, wherein the one or more parameters of the RF communication network include a radio access technology (RAT) of the RF communication network, a channel of the RF communication network, or bandwidth of the RF communication network:
- determining antenna impedance;
- and
- changing the antenna aperture tuning state according to the determined antenna impedance by one or more of:
- changing an RF coupling state of a first antenna radiating element to a second radiating element, changing an RF coupling state of an antenna radiating element to ground, changing an RF coupling state of an antenna radiating element to an inductor of an antenna circuit of the RF circuitry, changing an RF coupling state of an antenna radiating element to a capacitor of the antenna circuit, and changing an RF coupling location of a ground leg of an RF antenna circuit of the RF circuitry.
A method of operating radio frequency (RF) circuitry to communicate via an RF communication network, the method comprising:
- setting an antenna aperture tuning state according to parameters of the RF communication network,
- determining antenna impedance:
- selecting an antenna aperture tuning state using a lookup table that includes antenna aperture tuning states indexed according to antenna impedance;
- and
- measuring the antenna impedance and setting the aperture tuning circuit to the selected antenna aperture tuning state when detecting a change in one or more parameters of the RF communication network.
Dependencies are inferred from the claim text.