Directional antenna assembly for vehicular use
AssigneeRangeStar Wireless, Inc.
InventorGreg Johnson
Life of this patent
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Abstract
A multi-element radio antenna assembly is described. The antenna assembly includes a ground plane element having an array of conductor elements disposed thereon. A pair of LC trap structures provide dual band resonance for cellular telephone and PCS device bandwidth ranges. Additional performance may be achieved with parasitic reflector and director elements. The multi-element directional antenna finds particular applicability for in-vehicle use.
Claims13
A multi-element directional antenna comprising:
- a conductive ground plane element having a first surface;
- a conductive radiating element substantially vertically disposed upon the first surface of the ground plane element,
- a conductive reflector element substantially vertically disposed upon the first surface of the ground plane element;
- and
- a pair of LC traps, each LC trap including a conductive loop element and a conductive resonance element coupled in series manner, said conductive loop element having a first end and a second end, said first end being coupled to an associated one of said radiating element or reflector element, and said second end being coupled to the conductive resonance element.
A multi-element directional antenna having a direction of maximum propagation, said antenna comprising:
- a ground plane element having a first surface;
- an active radiating element disposed upon the first surface of the ground plane element;
- a parasitic reflector element disposed away from the active radiating element in the opposite direction of maximum propagation;
- and
- a pair of LC trap structures, each LC trap structure including a conductive loop element and a conductive resonance element coupled in series manner, said conductive loop element having a pair of opposed ends, one of the ends being coupled to an associated one of said radiating element or parasitic reflector element, and the other of the ends being coupled to conductive resonance element.
A multi-element directional antenna comprising:
- a horizontally disposed ground plane element;
- an active radiating element vertically disposed upon the ground plane element;
- a reflector element vertically disposed upon the ground plane element;
- and
- a pair of LC trap structures, each LC trap structure including a conductive loop element and a conductive resonance element coupled in series manner, said conductive loop element having a pair of opposed ends, one of the ends being coupled to an associated one of said radiating element or reflector element, and the other of the ends being coupled to conductive resonance element.
Dependencies are inferred from the claim text.