Abstract: A radar and communication (RadCom) system and a method for vehicles using a fast chirp signal are provided. A radar system includes a phase locked loop (PLL) configured to generate a radar signal, a signal generator configured to generate a communication signal and a mixer configured to mix the radar signal and the communication signal. The system also includes a transmitter configured to transmit an output signal from the mixer, a first switch configured to switch not to transmit the communication signal to the mixer in a radar mode, and a second switch configured to switch to connect a first filter to the PLL when the radar mode ends. Accordingly, RadCom transmission and reception using the fast chirp signal is possible.

Abstract: A high-efficiency high-integrated receiver is provided. The radar receiver according to an embodiment of the present disclosure includes a receiver configured to receive a radar signal, a processor configured to attenuate a magnitude of a low frequency band of the received signal of the receiver, a filter configured to perform a low pass filtering on an output signal of the processor, and an ADC configured to A/D convert the output signal of the filter. Accordingly, it is possible to demodulate all the signals being reflected from targets in various distances when even using a low resolution ADC, thereby reducing the manufacturing cost and power consumption.

Abstract: A power amplifier using an equivalent transformer is provided. The power amplifier includes amplifiers and T lines having first terminals connected to the amplifiers and second terminals connected to output sides. Accordingly, powers are combined using the equivalent transformer in the power amplifier, such that an insertion loss can be reduced and thus degradation of output power efficiency can be prevented.

Abstract: A power amplifier using an equivalent transformer is provided. The power amplifier includes amplifiers and T lines having first terminals connected to the amplifiers and second terminals connected to output sides. Accordingly, powers are combined using the equivalent transformer in the power amplifier, such that an insertion loss can be reduced and thus degradation of output power efficiency can be prevented.

Abstract: An RF amplifier to increase a gain using a transformer is provided. The amplifier includes: a first transistor configured to generate a current by amplifying and converting an input voltage; a second transistor configured to amplify the generated current; and a first transformer configured to feed an emitter current of the second transistor back to a gate. Accordingly, Gm of the transistor is boosted using the transformer, such that a high gain can be obtained with a low current. Therefore, a problem of a gain reduction caused by a parasitic capacitor at a high frequency can be solved.

Abstract: A radar and communication (RadCom) system and a method for vehicles using a fast chirp signal are provided. A radar system includes a phase locked loop (PLL) configured to generate a radar signal, a signal generator configured to generate a communication signal and a mixer configured to mix the radar signal and the communication signal. The system also includes a transmitter configured to transmit an output signal from the mixer, a first switch configured to switch not to transmit the communication signal to the mixer in a radar mode, and a second switch configured to switch to connect a first filter to the PLL when the radar mode ends. Accordingly, RadCom transmission and reception using the fast chirp signal is possible.

Abstract: An RF amplifier to increase a gain using a transformer is provided. The amplifier includes: a first transistor configured to generate a current by amplifying and converting an input voltage; a second transistor configured to amplify the generated current; and a first transformer configured to feed an emitter current of the second transistor back to a gate. Accordingly, Gm of the transistor is boosted using the transformer, such that a high gain can be obtained with a low current. Therefore, a problem of a gain reduction caused by a parasitic capacitor at a high frequency can be solved.

Abstract: A high-efficiency high-integrated receiver is provided. The radar receiver according to an embodiment of the present disclosure includes a receiver configured to receive a radar signal, a processor configured to attenuate a magnitude of a low frequency band of the received signal of the receiver, a filter configured to perform a low pass filtering on an output signal of the processor, and an ADC configured to A/D convert the output signal of the filter. Accordingly, it is possible to demodulate all the signals being reflected from targets in various distances when even using a low resolution ADC, thereby reducing the manufacturing cost and power consumption.

Abstract: Provided is a lower power and high efficiency millimeter-wave modulation apparatus capable of modulating digital data into transmitting signals in a millimeter frequency band, the millimeter-wave modulation apparatus including; a modulation part, which carries out a modulation of a constant envelope attribute, and to which a first local oscillation signal is fixed according to a rate of input data; a phase shifter adopted to shift a phase of an output of the modulation part; a power amplifier adopted to amplify an output of the phase shifter; and an antenna connected to an output of the power amplifier.

Abstract: Provided is a lower power and high efficiency millimeter-wave modulation apparatus capable of modulating digital data into transmitting signals in a millimeter frequency band, the millimeter-wave modulation apparatus including; a modulation part, which carries out a modulation of a constant envelope attribute, and to which a first local oscillation signal is fixed according to a rate of input data; a phase shifter adopted to shift a phase of an output of the modulation part; a power amplifier adopted to amplify an output of the phase shifter; and an antenna connected to an output of the power amplifier.