Abstract: An oven may include a cooking chamber configured to receive a food product, an antenna assembly and a cooking controller. The antenna assembly may include a plurality of antennas provided in increments corresponding to respective zones of the cooking chamber. The cooking controller may be operably coupled to the antenna assembly to selectively distribute power to respective ones of the antennas of the antenna assembly to provide radio frequency energy into the respective zones in a selected pattern.

Abstract: An oven may include a cooking chamber configured to receive a food product, an antenna assembly and a cooking controller. The antenna assembly may include a plurality of antennas provided in increments corresponding to respective zones of the cooking chamber. The cooking controller may be operably coupled to the antenna assembly to selectively distribute power to respective ones of the antennas of the antenna assembly to provide radio frequency energy into the respective zones in a selected pattern.

Abstract: A choke assembly for provision onto an oven door to seal radio frequency (RF) energy within the oven when the door is closed may include a capacitive coupling element and an inductive tuning element. The capacitive coupling element may include a plurality of tabs each having a first width. The inductive tuning element may include a plurality of projections bent relative to the capacitive coupling elements at a right angle, the projections each having a second width that is smaller than the first width.

Abstract: An interface circuit for selectively generating TV RF signals on one of two adjacent TV channels is designed with two independent RF oscillator-modulator circuits. The respective double sideband modulated signals generated by the RF modulators are respectively passed through separate frequency rejection filters designed to attenuate the lower sound sideband of each of the modulated signals. The resultant signals are applied to a common bandpass filter via an isolation network. The pass band of the bandpass filter encompasses substantially the combination of the pass bands of the broadcast TV channels corresponding to the RF signals generated. Consequently the lower frequency RF modulated signal is similar to a conventional vestigal sideband TV signal and the higher frequency RF modulated signal is a double sideband signal minus the lower sound sideband.