Toward a Broadband On-Chip Electron Paramagnetic Resonance Spectrometer up to 67 GHz: Design and Analysis of Key Components
Conventional Electron Paramagnetic Resonance (EPR) spectrometers are constrained by narrow bandwidths and bulky hardware. To address these limitations, I will present a design towards a compact, broadband on-chip EPR spectrometer operating up to 67 GHz. My talk will focus on the analysis and design of two critical on-chip components: the microwave probe and the detector. For the non-resonant planar microwave probe, I will outline design guidelines developed for two common types of transmission lines —microstrip and coplanar waveguide—aimed at maximizing the effective microwave magnetic field strength. Comparative analysis shows that the coplanar waveguide configuration achieves superior magnetic field performance. In addition, I will discuss the design and characterization of a SiGe BiCMOS distributed detector. I will introduce the distributed architecture and explain how it overcomes the bandwidth limitations typical of traditional detector designs. Finally, I will demonstrate how detector sensitivity can be optimized by adjusting its operating point in accordance with the EPR measurement settings.
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- Date: 16 May 2025
- Time: 03:00 PM UTC to 04:00 PM UTC
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- 100 Bureau Dr
- Gaithersburg, Maryland
- United States 20899
- Building: 221
- Room Number: B145
- Contact Event Host
- Co-sponsored by Dr. Veronika Szalai, Microsystems and Nanotechnology Division, NIST
Speakers
Selina of Karlsruhe Institute of Technology, Karlsruhe, Germany
Toward a Broadband On-Chip Electron Paramagnetic Resonance Spectrometer up to 67 GHz: Design and Analysis of Key Compone
Conventional Electron Paramagnetic Resonance (EPR) spectrometers are constrained by narrow bandwidths and bulky hardware. To address these limitations, I will present a design towards a compact, broadband on-chip EPR spectrometer operating up to 67 GHz. My talk will focus on the analysis and design of two critical on-chip components: the microwave probe and the detector. For the non-resonant planar microwave probe, I will outline design guidelines developed for two common types of transmission lines —microstrip and coplanar waveguide—aimed at maximizing the effective microwave magnetic field strength. Comparative analysis shows that the coplanar waveguide configuration achieves superior magnetic field performance. In addition, I will discuss the design and characterization of a SiGe BiCMOS distributed detector. I will introduce the distributed architecture and explain how it overcomes the bandwidth limitations typical of traditional detector designs. Finally, I will demonstrate how detector sensitivity can be optimized by adjusting its operating point in accordance with the EPR measurement settings.