A W-Band Signal Generation Using N-Push Frequency Multipliers for Low Phase Noise

Abstract

A W-band frequency generation for FMCW radar application is presented. It cascades a ring based five-push multiplier and a push-push injection-locked oscillator for 10 times multiplication with a two stage power amplifier. The chip is fabricated in 65 nm CMOS technology and its size including ESD-protected pads is . Phase noise of the output signal is 110 dBc/Hz at 1 MHz offset using the 7.8 GHz reference frequency with the phase noise of 132 dBc/Hz at 1 MHz offset. The output power of the complete circuit is larger than 8.8 dBm for the entire output locking range, and -push technique enables unwanted spur suppression larger than 59 dBc. The total power consumption is 265 mW.

A Compact Integration of a 77 GHz FMCW Radar System Using CMOS Transmitter and Receiver Adopting On-Chip Monopole Feeder

“…In this study, a ×28 frequency multiplier is adopted to lower the reference signal frequency to the sufficiently low frequency of 2.75 GHz, which can be easily distributed and ball-bonded on the low-cost FR-4 PCB. The multiplier chain is similar to the ×10 frequency multiplier used in our previous work [23], [31]. However, for the lower reference frequency, the higher order seven-push multiplier has been re-designed for this study.…”

“…A differential seven-push multiplier and a two-stage push-push doubler compose the multiplier chain in order to generate a 77 GHz signal. The basic operating principle of the proposed ×28 frequency multiplier is the same as that outlined in [31] and [32]. Fig.…”

79 GHz Active Array FMCW Radar System on Low-Cost FR-4 Substrates

“…Although the operation of the seven-push multiplier is similar to that of the previous work [11], this work newly adds pulse generators to reduce power consumption. In the previous work, the adder was driven by 50% duty pulse directly buffered from the ring OSC [5].…”

Broadband plasmon-induced transparency to an anapole mode induced absorption conversion Janus metastructure by a waveguide structure in the terahertz region

“…[1][2][3] In particular, the development of metastructures (MSs) has become increasingly urgent for effective THz applications. MSs are artificial structures that exhibit unconventional physical properties, including negative permittivity, 4 negative magnetic permeability, 5 and photonic band gap, 6 which make the MSs a popular research topic in academia.…”