Abstract: A negative transconductance device is disclosed. The negative transconductance device includes a first transistor having a P-type semiconductor channel, a second transistor having an N-type semiconductor channel, and a third transistor having an ambipolar semiconductor channel and positioned between the first and second transistors. A first drain electrode of the first transistor is electrically connected to a third source electrode of the third transistor, and a drain electrode of the third transistor is electrically connected to a second source electrode of the second transistor.

Abstract: A vehicle includes: a location identification device to identify a location of the vehicle; a first antenna including an antenna body, a first feeding line connected to the antenna body, and a second feeding line including a phase delay device connected to the antenna body; a first wireless transceiver connected to the first antenna to provide a communication signal to the first antenna through the first feeding line or the second feeding line; and a controller. The controller is configured to control the first wireless transceiver to provide a communication signal to the first antenna through the first feeding line in a first communication mode, control the first wireless transceiver to provide a communication signal to the first antenna through the first feeding line and the second feeding line in a second communication mode, and switch to the second communication mode if the vehicle approaches a toll booth while operating in the first communication mode.

Abstract: A vehicle includes: a location identification device to identify a location of the vehicle; a first antenna including an antenna body, a first feeding line connected to the antenna body, and a second feeding line including a phase delay device connected to the antenna body; a first wireless transceiver connected to the first antenna to provide a communication signal to the first antenna through the first feeding line or the second feeding line; and a controller. The controller is configured to control the first wireless transceiver to provide a communication signal to the first antenna through the first feeding line in a first communication mode, control the first wireless transceiver to provide a communication signal to the first antenna through the first feeding line and the second feeding line in a second communication mode, and switch to the second communication mode if the vehicle approaches a toll booth while operating in the first communication mode.

Abstract: A negative transconductance device is disclosed. The negative transconductance device includes a first transistor having a P-type semiconductor channel, a second transistor having an N-type semiconductor channel, and a third transistor having an ambipolar semiconductor channel and positioned between the first and second transistors. A first drain electrode of the first transistor is electrically connected to a third source electrode of the third transistor, and a drain electrode of the third transistor is electrically connected to a second source electrode of the second transistor.

Abstract: The present disclosure provides a V2X antenna and a V2X antenna system. The V2X (Vehicle-to-Everything) antenna system includes: a first antenna arranged in a front surface of an interior of a vehicle, wherein the first antenna is configured to communicate at least one of a V2X signal or an LTE (Long Term Evolution) signal; a second antenna arranged in a rear surface of a roof of the vehicle, wherein the second antenna is configured to communicate at least one of the V2X signal or the LTE signal; and a tuner module configured to perform diversity communication in response to at least one of the V2X signal or the LTE signal received from the first antenna and the second antenna.

Abstract: The present disclosure provides a V2X antenna and a V2X antenna system. The V2X (Vehicle-to-Everything) antenna system includes: a first antenna arranged in a front surface of an interior of a vehicle, wherein the first antenna is configured to communicate at least one of a V2X signal or an LTE (Long Term Evolution) signal; a second antenna arranged in a rear surface of a roof of the vehicle, wherein the second antenna is configured to communicate at least one of the V2X signal or the LTE signal; and a tuner module configured to perform diversity communication in response to at least one of the V2X signal or the LTE signal received from the first antenna and the second antenna.

Abstract: An antenna apparatus includes a first antenna unit inclined at a first inclination angle, a second antenna unit inclined in a direction opposite to the first antenna unit at a second inclination angle. A distribution unit distributes an electrical signal to one of the first antenna unit and the second antenna unit.

Abstract: An antenna apparatus includes a first antenna unit inclined at a first inclination angle, a second antenna unit inclined in a direction opposite to the first antenna unit at a second inclination angle. A distribution unit distributes an electrical signal to one of the first antenna unit and the second antenna unit.