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This paper presents an X-band chirp radar transceiver with bandwidth reduction for range detection. The radar transceiver includes a super-heterodyne receiver including an ADC, a direct-digital synthesizer (DDS) based transmitter and a phase-locked loop (PLL) synthesizer. In a modified Weaver architecture, the down-converted baseband signal is further mixed with another chirp signal through stretch...
This paper presents an X-band direct digital synthesis (DDS) based chirp radar transmitter implemented in 0.13µm SiGe BiCMOS technology. The transmitter contains a quadrature DDS, two low-pass filters, an IF IQ modulator, a programmable gain amplifier (PGA), a RF mixer and a pre-amplifier. The DDSs, built with two digital-to-analog converters (DACs), generate two-channel IQ baseband chirp signals...
This paper presents an X-band chirp radar receiver with bandwidth reduction for range detection. The proposed receiver is composed primarily of a RF front end with reconfigurable bandwidth, a receiver baseband and an ADC. The receiver uses dual down-conversion architecture to convert the X-band chirp signal to the baseband signal, which is further mixed with a replica of the transmitted chirp through...
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