Tunable inverted f antenna

A planar antenna, comprising:

• a ground plane extending in a first direction on a substrate;
• a radiating element coupled to the ground plane on the substrate, said radiating element having a length that defines a resonant frequency of the antenna;
• a feed line coupled to the radiating element;
• and
• a frequency adjustment section disposed along a length of the radiating element, said frequency adjustment section including at least one pair of contacts separated by a gap, wherein coupling of the at least one pair of contacts defines the length of said radiating element and consequently the resonant frequency of said antenna.

A planar antenna, comprising:

• a ground plane extending in a first direction;
• a radiating element having a length that defines a resonant frequency of the antenna, said radiating element having a first section extending from the ground plane in a second direction and a second section extending from the first section in a third direction;
• a feed line coupled to the second section of the radiating element;
• a first conductive trace disposed adjacent to the second section of the radiating element for adjusting a length of the radiating element and consequently the resonant frequency of the antenna;
• and
• a second conductive trace disposed adjacent to the first section of the radiating element for adjusting an impedance of the planar antenna.

A planar inverted-F antenna comprising:

• a ground plane extending in a first direction on a substrate;
• a radiating element coupled to the ground plane on the substrate;
• a feed line coupled to the radiating element, said coupling defining an impedance tap point of said antenna;
• an impedance adjustment mechanism disposed along a length of the radiating element and the feed line, said impedance adjustment mechanism comprises at least one pair of contacts between the radiating element and the feed line, wherein coupling of the at least one pair of contacts alters the impedance tap point of the antenna.

A planar antenna, comprising:

• a ground plane extending in a first direction on a substrate;
• a radiating element coupled to the ground plane on the substrate;
• a feed line coupled to the radiating element, said coupling defining an impedance tap point of said antenna;
• an impedance adjustment means disposed along a length of the radiating element and the feed line, said impedance adjustment means configured to couple at least one pair of contacts between the feed line and the radiating element to alter the impedance tap point of the antenna.

A planar antenna, comprising:

• a ground plane extending in a first direction on a substrate;
• a radiating element coupled to the ground plane on the substrate, said radiating element having a length that defines a resonant frequency of the antenna;
• a feed line coupled to the radiating element;
• and
• a frequency adjustment means disposed along a length of the radiating element, said frequency adjustment means configured to couple at least one pair of contacts to define the length of said radiating element and consequently the resonant frequency of said antenna.