초록 ▼

An adaptable homotropic antenna system for use with a portable communication transceiver is described. The antenna system can be used for reception or transmission and can be completely enclosed within the portable transceiver housing. The homotropic antenna system evaluates the quality of a receive

An adaptable homotropic antenna system for use with a portable communication transceiver is described. The antenna system can be used for reception or transmission and can be completely enclosed within the portable transceiver housing. The homotropic antenna system evaluates the quality of a received signal and if the signal is below a predetermined threshold level, an alternate antenna will be selected. The antenna system will continue to sample the available antennas until an antenna produces a signal of acceptable quality.

대표청구항 ▼

An improved homotropic antenna system fo use in a portable receiver having a non-conductive housing which encloses the antenna system comprising: first and second antenna means for receiving a transmitted R.F. signal, wherein said first and second antenna means are optimized for operation in differe

An improved homotropic antenna system fo use in a portable receiver having a non-conductive housing which encloses the antenna system comprising: first and second antenna means for receiving a transmitted R.F. signal, wherein said first and second antenna means are optimized for operation in different electromagnetic environments; first and second electronic switch means coupled to said first antenna means and said second antenna means respectively for actuating said first of second antenna response to a first of second control signal respectively; receiver means having an output for receiving an RF signal; first coupling means coupled to said second electronic switch means and to said receiver means for providing coupling between said second antenna means and said receiver means; signal strength evaluation means coupled to said receiver means for providing an output signal indicating the quality of the output signal of said receiver means; a control circuit means coupled to said signal quality evaluator means and to said first and second electronic switch means for alternately selecting the first antenna means or second antenna means if said output signal is in said first state and keeping an antenna activated if said output signal remains in said second state.