Wireless communications device having a compact antenna cluster
AssigneeLucent Technologies Inc.
InventorsAris L Moustakas, Hugo F Safar, Steven H Simon, Marin Stoytchev
Life of this patent
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Abstract
A wireless communication device comprising a signal processing device coupled to a cluster of multiple port antennas that can simultaneously transmit and/or receive communication signals. The cluster of antennas operates within a frequency band having maximum frequency f, and at least a pair of the antenna ports is placed in a volume of space whose longest linear dimension is λ/3 or less where λ is equal to c/f. During operation of the antenna cluster, the radiation patterns from different antennas have main lobes that point in different directions and have correlations of 0.7 or less with respect to each other.
Claims30
A wireless communication device comprising:
- at least one signal processing device;
- and
- a cluster of N multiple port antennas, which is capable of simultaneous transmission and/or reception of signals with relatively low correlation between the signals, is coupled to the at least one signal processing device where at least one pair of the antenna ports operating at a frequency, f, are placed within a volume of space whose longest linear dimension is λ/3 or less where λ is equal to c/f and N is an integer equal to 2 or greater.
A method of constructing an antenna cluster comprising N multiple port antennas capable of simultaneously transmitting and/or receiving communication signals while maintaining a relatively low correlation between signals of antennas in the cluster where N is an integer equal to 2 or greater, the method comprising the step of:
- positioning and orienting the antennas in the cluster such that during operation of the antenna cluster at a frequency f, resulting radiation patterns of each operating antenna port have a main lobe that points in a direction that is different from the direction pointed to by any other lobe and at least a pair of the antenna ports are placed in a volume of space whose longest linear dimension is λ/3 or less where λ is equal to c/f.
Dependencies are inferred from the claim text.