Micro-slot antenna

A radio device, comprising:

• a radio element including at least one of a transmitter and a receiver;
• a user interface coupled to the radio element for interfacing with a user;
• and
• a micro-slot antenna coupled to the radio element for intercepting a radio signal to be received at a predetermined wavelength, the antenna comprising
• a rectangular dielectric substrate having two long edges and two short edges;
• a U-shaped conductive strip attached to a first surface of the substrate, the U-shaped conductive strip having two side members, each about one-eighth the predetermined wavelength in length, and an end member forming a substantially rectangular slot extending parallel to the long edges, the slot closed at a first end by the end member, and open at a second end;
• a microstrip feed line attached to a second surface of the substrate opposite and parallel to the first surface for coupling an RF signal between the antenna and the radio element, the microstrip feed line extending across and perpendicular to the slot proximate the second end of the slot, and further extending across a portion of the two side members;
• and
• a ground point electrically coupled to a first one of the two side members of the U-shaped conductive strip and positioned proximate the second end of the slot.

A micro-slot antenna for use at a predetermined wavelength, the antenna comprising:

• a rectangular dielectric substrate having two long edges and two short edges;
• a U-shaped conductive strip attached and parallel to a first surface of the substrate, the U-shaped conductive strip having two side members, each about one-eighth the predetermined wavelength in length, and an end member forming a substantially rectangular slot extending parallel to the long edges, the slot closed at a first end by the end member, and open at a second end;
• a microstrip feed line attached and parallel to a second surface of the substrate opposite and parallel to the first surface for coupling an RF signal between the antenna an RF device, the microstrip feed line extending across and perpendicular to the slot proximate the second end of the slot, and further extending across a portion of the two side members;
• and
• a ground point electrically coupled to a first one of the two side members of the U-shaped conductive strip and positioned proximate the second end of the slot.