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Audio Signal Processing

Diversity-apparatus-for-a-global-positioning-system-antenna

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Diversity apparatus for a global positioning system antenna

Details

Inventors: Kim, Kyung-Ho;
Assignee: Hyundai Electronics Industries Co., Ltd. (KR)
Primary Examiner: Eisenzopf; Reinhard J.
Assistant Examiner: Le; Thanh
Attorney, Agent or Firm: Klein; David M. Bryan Cave LLP

A diversity apparatus for a global positioning system antenna capable of selectively using a better receiving sensitivity antenna among antennas is disclosed. The invention includes at least two antennas; first and second amplification comparing means for amplifying signals received from the antenna through a low noise amplifier and a coupling line and for comparing a direct current with a base voltage; selection means for selecting one antenna among the antennas by activating an impedance line; and first and second connection means for determining from the amplified signals, which of the antenna signals to output, and outputting the alternating current signal from that antenna.

DETAILED DESCRIPTION Accordingly, it is an object of the present invention to provide a diversity apparatus for a global positioning system antenna capable of selecting an antenna having the best receiving sensitivity from amongst a plurality of antennas by comparing the radio frequency signal of the current antenna with a compared base level of a newly added antenna.
To achieve this object, the invention includes at least two antennas; first and second amplification comparing means for amplifying signals received from the antennas through a low noise amplifier and a coupling line, and for comparing a direct current signal from the antennas with a base voltage; selection means for selecting one antenna among the antennas by activating an impedance line; and first and second connection means for determining, from the amplified signals, which of the antenna signals to output, and cutting off direct current of the impedance line by opening the alternating current component.

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