Patent ID: 8010062
Filing Date: 2011-08-30
Classification: H01Q

Abstract:
1. A multiple frequency antenna array comprises: a first antenna circuit tuned to a first carrier frequency to produce a first radiation pattern, wherein the first antenna circuit transmits a first representation of a radio frequency (RF) signal at the first carrier frequency, and wherein the first carrier frequency corresponds to a carrier frequency of the RF signal with a first frequency offset; a second antenna circuit tuned to a second carrier frequency to produce a second radiation pattern, wherein the second antenna circuit transmits a second representation of the RF signal at the second carrier frequency, and wherein the second carrier frequency corresponds to the carrier frequency of the RF signal with a second frequency offset; a third antenna circuit tuned to a third carrier frequency to produce a third radiation pattern, wherein the third antenna circuit transmits a third representation of the RF signal at the third carrier frequency, and wherein the third carrier frequency corresponds to the carrier frequency of the RF signal with a third frequency offset; and a fourth antenna circuit tuned to a fourth carrier frequency to produce a fourth radiation pattern, wherein the fourth antenna circuit transmits a fourth representation of the RF signal at the fourth carrier frequency, and wherein the fourth carrier frequency corresponds to the carrier frequency of the RF signal with a fourth frequency offset, in which the first, second third and fourth radiation patterns are different from each other and in which at least the first frequency offset and the second frequency offset have different frequency offset values and still maintain the first carrier frequency and the second carrier frequency within a bandwidth of the RF signal, but have sufficient frequency separation to inhibit nulling of the first and second radiation patterns.