Antenna with multiple coupled regions

Abstract

An antenna having a driven element coupled to multiple additional elements to resonate at multiple frequencies. A magnetic dipole mode is generated by coupling a driven element to a second element, and additional resonances are generated by coupling additional elements to either or both of the driven or second element. One or multiple active components can be coupled to one or more of the coupled elements to provide dynamic tuning of the coupled or driven elements.

1 . An antenna, comprising:
 a first element and a second element positioned above a ground plane,
 said first element connected to a transceiver, 
 said second element connected to ground and coupled to said first element to form 
 a first coupling region, and 
   a third element positioned above the ground plane,
 said third element connected to ground and coupled to at least one of the first element and second element to form a second coupling region. 
   
     
     
         2 . The antenna of  claim 1 , comprising four or more elements,
 said four or more elements including at least one driven element,   wherein each element is coupled to at least one of a driven element and a grounded element.   
     
     
         3 . The antenna of  claim 1 , wherein at least one of the second element or the third element is connected to ground by a component for varying the frequency of the antenna. 
     
     
         4 . The antenna of  claim 3 , wherein said component is one of a capacitor, inductor, resistor, diode, active tuning component, or a switch. 
     
     
         5 . The antenna of  claim 4 , comprising multiple components. 
     
     
         6 . The antenna of  claim 1 , wherein said first element and said second element are configured to form an Isolated Magnetic Dipole (IMD) element. 
     
     
         7 . The antenna of  claim 6 , wherein the IMD element comprises a first portion connected the transceiver and a second portion coupled to the first portion. 
     
     
         8 . The antenna of  claim 7 , wherein the third element is connected to the ground plane at one end and coupled to the first portion of the IMD element. 
     
     
         9 . The antenna of  claim 8 , wherein multiple elements are coupled to the IMD element at the first portion. 
     
     
         10 . The antenna of  claim 9 , wherein at least one element is connected to a component selected from the group consisting of: a capacitor, inductor, resistor, diode, active tuning component, and a switch. 
     
     
         11 . The antenna of  claim 10 , wherein said component is connected to ground.