A 40.5-to-58.5GHz 36%-Fractional-Chirp-Bandwidth 18GHz-Absolute-Chirp-Bandwidth 2.2GHz/μs-Chirp-Rate 0.02%-Chirp-Error Post-Mixing Bandwidth-Extending Sawtooth-FMCW Frequency Synthesizer Employing a Chirp-Tracking ILFT and a Fractional-Bandwidth Doubler
Abstract
An 18GHz-bandwidth (BW) sawtooth-FMCW synthesizer is presented. First, a chirp-tracking ILFT with feed-forward and frequency-tracking loop ensures robust and continuous tracking of fast chirps. Second, a fractional-BW (FBW) doubler enables sawtooth generation and extends both the BW and FBW while halving the chirp error. The synthesizer measures a 36% FBW sawtooth FMCW chirp from 40.5 to 58.5 GHz with a 0.02% chirp error at a chirp rate of$2.2 \text{GHz} / \mu \mathrm{s}$without DCO-nonlinearity digital pre-distortion.
Fields of Study & Subjects
Advancements in PLL and VCO Technologies
Radio Frequency Integrated Circuit Design
Advanced Photonic Communication Systems
Publication details
- Journal / source
- Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference
- Pages
- 478–480
- Publication date
- 15 February 2026
- Language
- EN