Broadband Continuous Time Delta Sigma Modulators for Millimeter Wave Digital Arrays
Abstract
A fully integrated mm-wave, 16-element, 4-beam digital beamformer with 100MHz bandwidth was implemented in 40nm CMOS technology. In addition, a four-tile system with a custom substrate supports four chiplets. The four-chiplet substrate includes sixtyfour 28GHz patch antennas and the power and digital infrastructure to support the chiplets. Furthermore, this work tackles the design of the frequency-offset bandpass modulators and introduces simple filters to efficiently suppress out-of-band quantization noise before combining modulator outputs. A proof-of-concept 2x frequency interleaved prototype doubles the conversion bandwidth with only a 3% power consumption overhead for the additional digital filtering circuity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 07, 2023
- Accession Number
- AD1202979
Entities
People
- Christine Weston
- Michael O. Flynn
- Rundao Lu
Organizations
- University of Michigan