Tunable Radio Frequency (RF) to Millimeter-Wave Receivers and Filters
Abstract
Tunable N-path filters and receivers were investigated in 45nm RFSOI for digital beamforming. Reflection-mode N-path filters operated across4-30 GHz or 18-50 GHz with selectable 0.2 or 2 GHz bandwidth with third- to fourth-order response. Insertion loss was 4-10 dB and out-ofband (OOB) rejection was 25-35 dB. NF was 6-16 dB or 10-20 dB whereas in-band IIP3 was +2 dBm. A tunable receiver with frequencytranslated N-path feedback operated across 4-31 GHz or 16-50 GHz, achieving 20-29 dB conversion gain, 5-10 dB NF, and -6.4 dBm in-bandIIP3, with second or third-order response. Linearization improved IIP3 to +10 dBm whereas complex RC N-path feedback improved return lossbandwidth and OOB linearity. Finally, a cascaded filter and receiver was created with expected sixth-order response and >50 dB OOB rejection,tunable across 6-31 GHz. The cascade is expected to achieve 10-14 dB NF and +2 dBm IIP3. IIP3 of +10 dBm appears achievable usingoptimized biasing techniques. Overall, these techniques show how widely-tunable N-path architectures enable broadband frequency-selectivedigital beamforming
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2022
- Accession Number
- AD1209006
Entities
People
- Brian Floyd
Organizations
- North Carolina State University