Reconfigurable RF front end: A mixer-first architecture and tunable filters
Cao, Xuanzhen
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https://hdl.handle.net/2142/106373
Description
Title
Reconfigurable RF front end: A mixer-first architecture and tunable filters
Author(s)
Cao, Xuanzhen
Issue Date
2019-12-09
Director of Research (if dissertation) or Advisor (if thesis)
Zhou, Jin
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
RF Front End
Receiver
Tunable Filter
Mixer-First Receiver
Distributedly Modulated Capacitors (DMC)
Abstract
Two ways of achieving a reconfigurable RF receiver system, namely a mixer-first receiver system and an on-chip tunable bandpass filter, are reviewed and verified. For the mixer-first receiver, a pure passive mixer called distributedly modulated capacitor (DMC) is introduced and analyzed, then simulation in ADS is reported, the results of which prove the capability of DMC to achieve a mixer-first receiver system. In addition, a mixer-first receiver with conventional mixer and bandpass filter is designed on PCB and measured in lab. For the tunable bandpass filter, the concept of N-path filter is discussed and some simulation results are reported. Some possible improvements to N-path filter are investigated and simulated.
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