CIRCULARLY POLARIZED ANTENNA
First Claim
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1. A circularly polarized antenna, comprising:
- a generally helical wire defining a generally cylindrical passage having a first end and a second end;
a first ground plane proximate the first end of the generally cylindrical passage, the first ground plane having a width substantially equal to a diameter of the generally cylindrical passage; and
a cable extending through the generally cylindrical passage, the cable electrically coupled to the first ground plane and to the generally helical wire proximate the first end.
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Abstract
A circularly polarized antenna includes a generally helical wire defining a generally cylindrical passage having a first end and a second end. A first ground plane is proximate the first end of the generally cylindrical passage and has a width substantially equal to a diameter of the generally cylindrical passage. A cable extends through the generally cylindrical passage and is electrically coupled to the first ground plane and to the generally helical wire proximate the first end.
19 Citations
34 Claims
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1. A circularly polarized antenna, comprising:
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a generally helical wire defining a generally cylindrical passage having a first end and a second end; a first ground plane proximate the first end of the generally cylindrical passage, the first ground plane having a width substantially equal to a diameter of the generally cylindrical passage; and a cable extending through the generally cylindrical passage, the cable electrically coupled to the first ground plane and to the generally helical wire proximate the first end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A wireless interrogator for emitting wireless interrogation signals, comprising:
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a wireless signal generator; and a circularly polarized antenna coupled to the wireless signal generator, the circularly polarized antenna including; a generally helical wire defining a generally cylindrical passage having a first end and a second end; a first ground plane proximate the first end of the generally cylindrical passage, the first ground plane having a width substantially equal to a diameter of the generally cylindrical passage; and a cable extending through the generally cylindrical passage and communicatively coupled to the wireless signal generator, the cable electrically coupled to the first ground plane and to the generally helical wire proximate the first end. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification