Adaptive impedance matching module (AIMM) control architectures
First Claim
2. The apparatus of claim 1, wherein said microcontroller or DSP chip samples the complex reflection coefficient information from at least one analog to digital converter (ADC).
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Abstract
An embodiment of the present invention an apparatus, comprising an adaptive impedance matching module (AIMM) adapted to minimize the magnitude of an input reflection coefficient seen at an RFin port under boundary conditions of a variable load impedance ZL, a tuner connected to the AIMM and including a plurality of variable reactance networks with independent control signals, wherein node voltages are sampled within the tuner; and a microcontroller or digital signal processor (DSP) calculates complex reflection coefficient information from the sampled voltages, the microcontroller or DSP providing a coarse and fine tune function that feeds bias signals to control impedance matching.
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Citations
28 Claims
- 2. The apparatus of claim 1, wherein said microcontroller or DSP chip samples the complex reflection coefficient information from at least one analog to digital converter (ADC).
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7-1. The apparatus of claim 6, wherein said minimization algorithm is selected from the group consisting of:
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a downhill simplex method in multidimensions;
a conjugate gradient method in multidimensions;
or a quasi-Newton method.
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12. An apparatus, comprising:
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an adaptive antenna impedance matching module (AIMM) adapted to minimize the magnitude of an input reflection coefficient seen at an RFin port under boundary conditions of a variable load impedance ZL;
a tuner connected to said AIMM and including a plurality of variable reactance networks with independent control signals, wherein an input impedance sensing circuit provides direct measurement of the ratio of the first two complex nodal voltages at the input side of said tuner; and
a microcontroller or digital signal processor (DSP) samples said complex node voltage ratio and calculates the complex input reflection coefficient and provides a tune function that feeds approximate bias signals to control. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 24, 25, 28)
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- 20. The apparatus of claim 12, wherein said node voltages are switched such that they may be measured in sequence and controlled by said microcontroller or DSP.
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20-2. An apparatus, comprising:
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an adaptive antenna impedance matching module (AIMM) adapted to minimize the magnitude of an input reflection coefficient seen at an RFin port under boundary conditions of a variable load impedance ZL;
a tuner connected to said AIMM and including a plurality of variable reactance networks with independent bias control signals, wherein an RF voltage sensing circuit provides direct measurement of the magnitudes of three nodal voltages at the input side of said tuner; and
a microcontroller or digital signal processor (DSP) that calculates the AIMM input impedance from ratios of said node voltages, wherein three measurements of node voltage magnitude permit a unique determination of the input impedance for the tuner.
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22. A method, comprising:
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minimizing the magnitude of an input reflection coefficient seen at an RFin , port under boundary conditions of a variable load impedance ZL by an adaptive impedance matching module (AIMM) by using a tuner connected to said AIMM and including a plurality of variable reactance networks with independent bias control signals within said tuner, wherein two or more node voltages on the input side of the tuner are sampled ; and
using a microcontroller or digital signal processor (DSP) to calculate complex reflection coefficient information from said node voltages and providing by said microcontroller or DSP a tune function that feeds bias signals to control said variable reactance networks. - View Dependent Claims (23)
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26. A machine-accessible medium that provides instructions, which when accessed, cause a machine to perform operations comprising:
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minimizing the magnitude of an input reflection coefficient seen at an RFin port under boundary conditions of a variable load impedance ZL by an adaptive impedance matching module (AIMM) by using a tuner connected to said AIMM and including a plurality of variable reactance networks with independent control signals within said tuner, wherein two or more node voltages are sampled within said tuner; and
using a microcontroller or digital signal processor (DSP) to calculate complex reflection coefficient information from said node voltages and providing by said microcontroller or DSP a coarse tune function that feeds approximate bias signals to control said variable reactance networks. - View Dependent Claims (27)
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Specification