Portable RF antenna
First Claim
1. A collapsible half-wavelength dipole antenna for use in a portable device, said antenna having a fully collapsed position and a fully extended position, said antenna comprising:
- a static dipole arm;
a movable dipole arm, said movable dipole arm capable of being moved to the fully collapsed position and the fully extended position;
a balun feed assembly, said balun feed assembly electrically coupled to said static dipole arm and to said movable dipole arm, said antenna capable of transmitting and receiving electrical signals in either the fully collapsed position or the fully extended position, said balun feed assembly fixed to said static dipole arm, and said movable dipole arm movably coupled to said balun feed assembly.
10 Assignments
0 Petitions
Accused Products
Abstract
A small, collapsible, high-gain, dipole antenna and a method to make the antenna. The present invention provides a collapsible half-wavelength dipole antenna for use in a portable device, the antenna having a fully collapsed position and a fully extended position. The antenna includes a static dipole arm, and a movable dipole arm. The movable dipole arm is capable of being moved to the fully collapsed position and the fully extended position. The antenna also includes a balun feed assembly electrically coupled to the static dipole arm and to the movable dipole arm. The antenna is capable of transmitting and receiving electrical signals in either the fully collapsed position or the fully extended position. The balun feed assembly is fixed to the static dipole arm, and the movable dipole arm is movably coupled to the balun feed assembly. According to specific embodiments, the antenna may include a static dipole arm positioned adjacent and parallel to the balun feed assembly to provide a folded dipole antenna when in the fully collapsed position. In accordance with other embodiments, the movable dipole arm of the present antenna may be, for example, retracted or rotated into its collapsed position.
-
Citations
24 Claims
-
1. A collapsible half-wavelength dipole antenna for use in a portable device, said antenna having a fully collapsed position and a fully extended position, said antenna comprising:
-
a static dipole arm; a movable dipole arm, said movable dipole arm capable of being moved to the fully collapsed position and the fully extended position; a balun feed assembly, said balun feed assembly electrically coupled to said static dipole arm and to said movable dipole arm, said antenna capable of transmitting and receiving electrical signals in either the fully collapsed position or the fully extended position, said balun feed assembly fixed to said static dipole arm, and said movable dipole arm movably coupled to said balun feed assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A method of making a collapsible half-wavelength dipole antenna for use in a portable device, said method comprising:
-
providing a balun feed assembly; providing a static dipole arm and a movable dipole arm, both coupled to said balun feed assembly, said movable dipole arm capable of being moved into a collapsed position and an extended position; and optimizing performance of said antenna by varying different dimensions of said antenna to produce an antenna capable of acceptable gain and VSWR in both the collapsed and extended positions.
-
Specification