Horizontally polarized omni-directional antenna
First Claim
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1. An antenna apparatus comprising:
- a circuit board comprising a plurality of dipole antenna elements including inductive and capacitive elements, anda quarter-wave sleeved balun and coaxial cable feed assembly connected to said circuit board, and whereinsaid plurality of dipole elements comprise a first section and a second section,said first section is located on the bottom side of said circuit board, and said second section is located on the top side of said circuit board and is substantially perpendicular and capacitively coupled to said first sections, andsaid plurality of dipole elements are laterally offset from each other to create an overlapping of the capacitively coupled elements, and whereinsaid inductive and capacitive elements are in series with a pair of J shaped elements, andsaid pair of J shaped elements are patterned onto the circuit board in a clockwise direction, wherein, a first J shaped element is starting to the left and a second J shaped element is starting to the right of said quarter-wave sleeved balun and coaxial cable feed assembly.
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Abstract
An antenna apparatus comprising bent dipoles and fed by a quarter-wave balun transformer with a single coaxial cable feed is disclosed. In this embodiment, the antenna elements are patterned onto a dielectric circuit board which is then mounted horizontally into a molded shell. The antenna is tuned by trimming the bent dipoles patterned on the circuit board.
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Citations
14 Claims
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1. An antenna apparatus comprising:
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a circuit board comprising a plurality of dipole antenna elements including inductive and capacitive elements, and a quarter-wave sleeved balun and coaxial cable feed assembly connected to said circuit board, and wherein said plurality of dipole elements comprise a first section and a second section, said first section is located on the bottom side of said circuit board, and said second section is located on the top side of said circuit board and is substantially perpendicular and capacitively coupled to said first sections, and said plurality of dipole elements are laterally offset from each other to create an overlapping of the capacitively coupled elements, and wherein said inductive and capacitive elements are in series with a pair of J shaped elements, and said pair of J shaped elements are patterned onto the circuit board in a clockwise direction, wherein, a first J shaped element is starting to the left and a second J shaped element is starting to the right of said quarter-wave sleeved balun and coaxial cable feed assembly. - View Dependent Claims (2, 3, 4)
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5. A method for tuning an antenna apparatus comprising the steps of:
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creating an circuit board comprising a plurality of dipole antenna elements, patterning a first section of said plurality of dipole antenna elements on the bottom side of said circuit board and a second section of said plurality of dipole antenna elements on the topside of said circuit board so that said second section is substantially perpendicular and capacitively coupled to said first sections, forming said second section of said plurality of dipole antenna elements as a pair of J shaped elements that are patterned onto said circuit board in a clockwise direction, wherein, a first J shaped element is starting to the left and a second J shaped element is starting to the right of said quarter-wave sleeved balun and coaxial cable feed assembly, and configuring said J shaped elements such that a width of each J shaped element is wider in that an area of said pair of J shaped elements that run parallel to the long axis of said circuit board. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method of manufacturing an antenna apparatus comprising the steps of:
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creating a circuit board comprising a dielectric substrate and inductive and capacitive elements are in series with a pair of J shaped elements, forming a feed assembly from a single coaxial cable with a quarter-wave sleeved balun assembly, forming one piece antenna apparatus plastic shell, positioning a plastic cap as a top of said antenna apparatus plastic shell, placing said circuit board within said antenna apparatus plastic shell just below said plastic cap, oriented in the horizontal plane, bonding a metal baseplate to the bottom of said antenna apparatus plastic shell, connecting said feed assembly to said circuit board and terminating said feed assembly with a connector at said metal baseplate, and injecting a foam material to fill said antenna apparatus plastic shell and allowing said foam material to encapsulate the upper surface of said circuit board. - View Dependent Claims (12, 13, 14)
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Specification