Patent ID: 7071791

Claim:
An automatic antenna-switching apparatus, comprising: an RF input port receives RF energy from a communication device, said RF energy having a given frequency; said RF input port is connected to an RF sensing coil and a plurality of output antenna connectors; said RF sensing coil provides said RF energy to a means for RF sensing; said RF sensing means, having a means for frequency counting, sends a frequency count output to a means for antenna port selection; said plurality of output antenna connectors being coupled to a plurality of output antennas with a plurality of antenna characteristics; said antenna port selection means, having a means for frequency comparison, compares said frequency count output with said plurality of antenna characteristics to generate an antenna selection output; said antenna port selection means provides an antenna selection output to one of a plurality of RF output connectors causing a corresponding one of said plurality of antennas to transmit said RF energy; said communications device is a multiband communications device; said apparatus being connected to said multiband communications device and housed in a metal container; and said apparatus reduces an unwanted radio frequency interference by-product caused by signal leakage.