Communications circuitry for an electronic device
First Claim
1. A communications circuit assembly for an electronic device through which the electronic device establishes wireless communications with a communications network, comprising:
- a transceiver;
an antenna assembly;
an impedance matching tuner that operatively couples the transceiver and the antenna assembly, the impedance matching tuner has a variable impedance matching configuration to match impedance of the antenna assembly to the transceiver; and
a controller configured to control the impedance matching tuner by outputting impedance matching tuner control data to the impedance matching tuner, wherein the impedance matching tuner control data is;
predetermined tuning values for a currently used frequency band and a currently sensed loading condition of the antenna assembly when transmit power is below a predetermined threshold so that the impedance matching configuration of the impedance matching tuner coupling the antenna assembly and the transceiver is open loop; and
closed loop controlled tuning values that start with the predetermined tuning values for the currently used frequency band and currently sensed loading condition of the antenna assembly when transmit power is above the predetermined threshold so that the impedance matching configuration of the impedance matching tuner coupling the antenna assembly and the transceiver is closed loop.
6 Assignments
0 Petitions
Accused Products
Abstract
The control of an antenna tuner for a portable electronic device includes closed loop tuning when sufficient transmit power is present. The closed loop tuning commences using a predetermined antenna tuner configuration for an operational band and device state. The closed loop tuning may be constrained by a tuning range associated with the predetermined antenna tuner configuration for the operational band and device state. Also, when transmit power is low or when a transceiver is in a receive only state, open loop tuning may be conducted by placing the antenna tuner in the predetermined (or default) configuration for the operational band and phone state.
16 Citations
12 Claims
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1. A communications circuit assembly for an electronic device through which the electronic device establishes wireless communications with a communications network, comprising:
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a transceiver; an antenna assembly; an impedance matching tuner that operatively couples the transceiver and the antenna assembly, the impedance matching tuner has a variable impedance matching configuration to match impedance of the antenna assembly to the transceiver; and a controller configured to control the impedance matching tuner by outputting impedance matching tuner control data to the impedance matching tuner, wherein the impedance matching tuner control data is; predetermined tuning values for a currently used frequency band and a currently sensed loading condition of the antenna assembly when transmit power is below a predetermined threshold so that the impedance matching configuration of the impedance matching tuner coupling the antenna assembly and the transceiver is open loop; and closed loop controlled tuning values that start with the predetermined tuning values for the currently used frequency band and currently sensed loading condition of the antenna assembly when transmit power is above the predetermined threshold so that the impedance matching configuration of the impedance matching tuner coupling the antenna assembly and the transceiver is closed loop. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of tuning an antenna assembly from a communications circuit assembly for an electronic device through which the electronic device establishes wireless communications with a communications network, comprising:
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operatively coupling a transceiver and the antenna assembly with a impedance matching tuner, the impedance matching tuner having a variable impedance matching configuration to match impedance of the antenna assembly to the transceiver; and controlling the impedance matching tuner by outputting impedance matching tuner control data with a controller, wherein the impedance matching tuner control data is; predetermined tuning values for a currently used frequency band and a currently sensed loading condition of the antenna assembly when transmit power is below a predetermined threshold so that the impedance matching configuration of the impedance matching tuner coupling the antenna assembly and the transceiver is open loop; and closed loop controlled tuning values that start with the predetermined tuning values for the currently used frequency band and currently sensed loading condition of the antenna assembly when transmit power is above the predetermined threshold so that the impedance matching configuration of the impedance matching tuner coupling the antenna assembly and the transceiver is closed loop. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification