Antenna system and filter
AssigneesGeneral Motors Corporation, GM Global Technology Operations LLC
InventorsHYOK JAE SONG, CARSON R. WHITE, YOON YEONG, ERAY YASAN
Life of this patent
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Abstract
Antenna systems and antenna filters are provided, for example for use in a windshield or on a roof of a vehicle. An antenna system comprises a first antenna, a second antenna, and a filter. The first antenna is configured to operate at a first frequency. The second antenna is configured to operate at a second frequency. The filter is coupled to the first antenna. The filter is configured to create an open circuit condition at the second frequency and reduce secondary radiation between the first and second antennas.
Claims20
An antenna system comprising:
- an antenna configured to operate at a first frequency;
- and
- a filter coupled to the antenna, the filter configured to create an open circuit condition at a second frequency that is different from the first frequency and reduce secondary radiation from the antenna at the second frequency.
A filter for an antenna system comprising a first antenna configured to operate at a first frequency and a second antenna configured to operate at a second frequency that is different from the first frequency, the filter comprising:
- an input port configured to be coupled to the first antenna;
- an output port configured to be coupled to a receiver for the first antenna;
- and
- a transmission line coupled between the input port and the output port, the transmission line configured to adjust a phase of the filter to generate an open circuit condition at the second frequency.
An antenna system comprising:
- a first antenna configured to operate at a first frequency;
- a second antenna configured to operate at a second frequency that is different from the first frequency;
- and
- a filter coupled to the first antenna, the filter configured to create an open circuit condition at the second frequency and reduce secondary radiation from the first antenna at the second frequency.
Dependencies are inferred from the claim text.