Feed network
First Claim
1. 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.
3 Assignments
0 Petitions
Accused Products
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.
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Citations
17 Claims
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1. 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.- View Dependent Claims (2, 3, 4, 5, 6)
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7. 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.- View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification