RF circuitry and compact hybrid for wireless communication devices
First Claim
1. Circuitry comprising:
- a hybrid to combine signals from a pair of antennas and to provide a sum signal and a difference signal; and
switching circuitry to select between the sum signal and the difference signal based on a signal quality of the sum and difference signals.
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Abstract
A compact hybrid comprises reactive power-dividers and signal paths coupling the reactive power-dividers to provide a predetermined phase difference therebetween. The signal paths may have 90-degree bends therein to reduce a distance between adjacent reactive power-dividers to less than a physical distance associated with the predetermined phase difference in a stripline medium. The hybrid may be a 180-degree hybrid and may be part of RF circuitry of a wireless communication device to combine signals from a pair of antennas and to provide a sum signal and a difference signal. The RF circuitry may also comprise switching circuitry to select between the sum signal and the difference signal based on a signal quality of the sum and difference signals.
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Citations
30 Claims
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1. Circuitry comprising:
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a hybrid to combine signals from a pair of antennas and to provide a sum signal and a difference signal; and
switching circuitry to select between the sum signal and the difference signal based on a signal quality of the sum and difference signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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generating a sum signal and a difference signal with a hybrid from a pair of antennas; and
selecting between the sum signal and the difference signal based on a packet error rate of the signals. - View Dependent Claims (18, 19)
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20. The method of claim wherein 19 the generating comprises:
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generating a first sum signal and a first difference signal in a first frequency spectrum with a first hybrid from a pair of antennas;
generating a second sum signal and a second difference signal in a second frequency spectrum with a second hybrid from the pair of antennas; and
separating the signals received through the pair of antennas into signals of the first and second frequency spectrums prior to generating the sum and difference signals, and wherein the selecting comprises selecting between either the first sum signal and the first difference signal, or the second sum signal and the second difference signal. - View Dependent Claims (21)
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22. A hybrid comprising:
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four reactive power-dividers; and
signal paths coupling the reactive power-dividers to provide a predetermined phase difference therebetween, wherein the signal paths have a plurality of 90-degree bends therein to reduce a distance between the coupled reactive power-dividers to less than a distance associated with the predetermined phase difference. - View Dependent Claims (23, 24)
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25. A wireless communication device comprising:
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a pair of substantially omnidirectional antennas;
a hybrid to receive signals from the pair of antennas and to provide a sum signal and a difference signal; and
switching circuitry to select between either the sum signal or the difference signal based on a signal quality of the sum and difference signals. - View Dependent Claims (26, 27)
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- 28. An article comprising a storage medium having stored thereon instructions, that when executed by a computing platform, result in selecting between a sum signal and a difference signal based on a packet error rate of the signals, the sum signal and the difference signal being generated with a hybrid from a pair of antennas.
Specification