Compact radio frequency transmitting and receiving antenna and control device employing same

An antenna operable to transmit or receive radio frequency signals at a specified frequency, the antenna for use with a device for controlling the power delivered to an electrical load, the antenna comprising:

• a first printed circuit board comprising a first radiating loop of conductive material having a capacitance and an inductance, the conductive material comprising a break and the capacitance including a capacitor bridging the break, the capacitance and the inductance forming a circuit being resonant at the specified frequency;
• wherein the first printed circuit board is disposed in a first plane, the first printed circuit board having first and second opposed surfaces, the conductive material being disposed on said first and second surfaces, at least one electrically conductive path being provided between the first and second surfaces to form the first radiating loop, whereby the first radiating loop is disposed in a plane perpendicular to the first plane and electrical current flows in the first radiating loop in the plane perpendicular to the first plane;
• and
• a second printed circuit board comprising a second feed loop of conductive material having two ends adapted to be electrically coupled to an electronic circuit, the second feed loop located in relation to the first radiating loop so as to be substantially only magnetically coupled to said first radiating loop and electrically insulated from the first radiating loop.