Feed network
AssigneeAndrew Corporation
InventorsRobert Daniel McCarthy, Russell Alan Fix
Life of this patent
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Abstract
An antenna feed network including a 180° hybrid coupler having a feed port, a 0° port; and a 180° port having an approximately 180° phase difference with the 0° port. A first antenna port is coupled to the 0° port; and a second antenna port is coupled to the 0° port via a respective phased line, the second antenna port having an approximately 90° phase difference with the first antenna port. A third antenna port is coupled to the 180° port; and a fourth antenna port is coupled to the 180° port via a respective phased line, the fourth antenna port having an approximately 90° phase difference with the third antenna port. The feed network can be used to drive antenna elements in phase quadrature. In a preferred embodiment the feed network drives a quadriflar helix antenna.
Claims17
An antenna feed network including:
- a 180° hybrid coupler having a feed port, a 0° port;
- and a 180° port having an approximately 180° phase difference with the 0° port;
- a first antenna port coupled to the 0° port;
- a second antenna port coupled to the 0° port via a respective phased line, the second antenna port having an approximately 90° phase difference with the first antenna port;
- a third antenna port coupled to the 180° port;
- and
- a fourth antenna port coupled to the 180° port via a respective phased line, the fourth antenna port having an approximately 90° phase difference with the third antenna port.
An antenna including:
- a 180° hybrid coupler having a feed element, a 0° port;
- and a 180° port having an approximately 180° phase difference with the 0° element;
- a first antenna element coupled to the 0° port;
- a second antenna element coupled to the 0° port via a respective phased line, the second antenna element having an approximately 90° phase difference with the first antenna element;
- a third antenna element coupled to the 180° port;
- and
- a fourth antenna element coupled to the 180° port via a respective phased line, the fourth antenna element having an approximately 90° phase difference with the third antenna element.
Dependencies are inferred from the claim text.