Abstract: Example embodiments relate to push-pull class E amplifiers. One example push-pull class E amplifier includes an input configured for receiving a signal to be amplified. The push-pull class E amplifier also includes an output configured for outputting the signal after amplification. Additionally, the push-pull class E amplifier includes a printed circuit board having a first dielectric layer and a second dielectric layer. Further, the push-pull class E amplifier includes a first amplifying unit and a second amplifying unit. Yet further, the push-pull class E amplifier includes a balun, a capacitive unit, a first line segment, a second line segment, a third line segment, and a fourth line segment. The first line segment and the second line segment are arranged on the first dielectric layer. A combined length of the third line segment and the fourth line segment corresponds to a quarter wavelength of an operational frequency of the amplifier.

Abstract: Example embodiments relate to push-pull class E amplifiers. One example push-pull class E amplifier includes an input configured for receiving a signal to be amplified. The push-pull class E amplifier also includes an output configured for outputting the signal after amplification. Additionally, the push-pull class E amplifier includes a printed circuit board having a first dielectric layer and a second dielectric layer. Further, the push-pull class E amplifier includes a first amplifying unit and a second amplifying unit. Yet further, the push-pull class E amplifier includes a balun, a capacitive unit, a first line segment, a second line segment, a third line segment, and a fourth line segment. The first line segment and the second line segment are arranged on the first dielectric layer. A combined length of the third line segment and the fourth line segment corresponds to a quarter wavelength of an operational frequency of the amplifier.

Abstract: Example embodiments relate to wireless synchronization for multi-channel RF heating and drying devices. One embodiment includes a multi-channel RE device. The RF device includes a cavity. The RE device also includes a first channel configured to generate a first RF signal and to transmit the first RE signal into the cavity. In addition, the RF device includes a second channel spaced apart and electrically isolated from the first channel. The second channel is configured to wirelessly receive the first RF signal transmitted by the first channel. The second channel is also configured to extract a frequency of the first RE signal from the received first RE signal. In addition, the second channel is configured to generate, based on the extracted frequency, a second RF signal. Further, the second channel is configured to transmit the second RF signal into the cavity.

Abstract: The present invention relates to a solid-state cooking apparatus. The present invention further relates to a field applicator for applying an electromagnetic wave, preferably to a cooking cavity of a solid-state cooking apparatus. The field applicator comprises a quadrature coupler for splitting a radiofrequency signal over a pair of antenna elements. The isolated port of the quadrature coupler is connected to a predefined load. The solid-state cooking apparatus is operable in at least one of a first mode and second mode, wherein, in the first mode, the predefined load equals an RF short or an RF open, and, in the second mode, the predefined load equals a dummy load configured to dissipate the signal received at the isolated port of the quadrature coupler.