Abstract: A system includes a first antenna and a second antenna. The first antenna includes an antenna section. The antenna section includes a first antenna segment, a second antenna segment adjacent to the first antenna segment, and a notch circuit disposed within a notch between the first antenna segment and the second antenna segment. The notch circuit prevents a first frequency of a signal from passing from the first antenna segment to the second antenna segment while allowing a second frequency from the signal to pass from the first antenna segment to the second antenna segment. The second antenna is disposed proximate to the first antenna. The first antenna occupies a second near field region of the second antenna and the second antenna occupies a first near field region of the first antenna.

Abstract: A system includes a first antenna and a second antenna. The first antenna includes an antenna section. The antenna section includes a first antenna segment, a second antenna segment adjacent to the first antenna segment, and a notch circuit disposed within a notch between the first antenna segment and the second antenna segment. The notch circuit prevents a first frequency of a signal from passing from the first antenna segment to the second antenna segment while allowing a second frequency from the signal to pass from the first antenna segment to the second antenna segment. The second antenna is disposed proximate to the first antenna. The first antenna occupies a second near field region of the second antenna and the second antenna occupies a first near field region of the first antenna.

Abstract: An electronic device having a unique interface between the electronic circuitry of the device and an antenna that is external to the device and located in a band. The antenna functionality is achieved externally in the band and includes a conductive path from one or more components of the device to the antenna in the band. The conductive path may extend through an exterior housing of the device to electrically connect the one or more components and the antenna.

Abstract: A location tracking system is provided for tracking the location of a child or other individual. The location tracking system includes a location server and one or more location tracking devices. Communication protocols are provided for communications between the location server and the location tracking devices. The communication protocols provide a low complexity and low cost solution for location tracking applications.

Abstract: Strips (220) of thin metallic material forming pairs of arms on an elongated dielectric tube (110) form a radiator portion of an antenna assembly. A first radiator plate (310) and a second radiator plate (320) are capacitively coupled to respective hot capacitive plate (270) and ground capacitive plate (280) on opposite sides of the dielectric tube and formed in a single etching step to improve manufacturability, reliability and cost of a radio.