Antenna assembly, and associated method, having an active antenna element and counter antenna element

In a method for communicating with a radio device having radio circuitry operable to communicate radio signals at least within a selected frequency range, the radio circuitry mounted at a substrate and having a ground part and a rf part, an improvement of a method for transducing the radio signals, said method comprising:

• positioning a first antenna element in a forward-extending direction, the first antenna element of a first lengthwise dimension L-x;
• connecting the first antenna element to the ground part and to the rf part of the radio circuitry, thereby to cause the first antenna element, in isolation, to be resonant about a first resonant frequency, the first resonant frequency about which, in isolation, the first antenna element is resonant being related to an antenna transducer of length L-x;
• positioning a second antenna element in a reverse-extending direction, spaced apart from the first antenna element by a first selected distance, l;
• connecting the second antenna element to the ground part of the radio circuitry, thereby offsetting the first resonant frequency at which the first antenna element, in isolation, is resonant, thereafter to be resonant at a first offset frequency, the first offset frequency about which the first antenna element is resonant being related to an antenna transducer, in isolation, of length L, the first offset frequency within the selected frequency range.

In a radio device having radio circuitry operable to communicate radio signals, the radio circuitry mounted at a substrate and having a ground part and a rf (radio frequency) part, an improvement of an antenna assembly for transducing the radio signals within a selected frequency range, said antenna assembly comprising:

• a first antenna element of a first lengthwise dimension, L-x, said first antenna element extending in a first lengthwise direction and having a dorsal side portion and a distal side portion, said first antenna element connected at the dorsal side portion thereof to the ground part of the radio circuitry, and said first antenna element connected to the rf part of the radio circuitry at a selected distance from the dorsal side portion at which said first antenna element is connected to the ground part, said first antenna element, in isolation, resonant about a first resonant frequency, the first resonant frequency about which, in isolation, said first antenna element is resonant being related to an antenna transducer of length L-x;
• a second antenna element of a second selected lengthwise dimension, positioned to have a portion thereof extend in a direction substantially corresponding to the first lengthwise direction in which said first antenna element extends and having a dorsal side portion and a distal side portion, said second antenna element connected at the distal side portion thereof to the ground part of the radio circuitry, said second antenna element spaced apart from said first antenna element by a selected distance, l, thereby to reduce the first resonant frequency at which said first antenna element is resonant, said first antenna element thereby resonant at a reduced, resultant frequency, the reduced, resultant frequency about which said first antenna element is resonant being related to an antenna transducer, in isolation, of length L, the reduced, resultant frequency range.