Single antenna for receipt of signals from multiple communications systems
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United States of America Patent
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Jun 8, 2004
Issued Date -
N/A
app pub date -
Oct 20, 2002
filing date -
Aug 3, 1999
priority date (Note) -
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Abstract
A method and device for using a single antenna for simultaneously receiving radio frequency signals in different L-band and GPS data band radio frequency bands embodied by example in a circuit having a directional coupler configured to direct a signal input at a first port into two second ports. Filters are coupled to receive the output of each second port, the filters being configured to reflect radio frequency energy in radio frequency bands other than the GPS data radio frequency band. The directional coupler is further configured to direct the reflected radio frequency energy into another port of the directional coupler. A filter is coupled to the other port of the directional coupler and is configured to reflect radio frequency energy in radio frequency bands other than the L-band radio frequency.
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