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Low-cost physiology and behavioral monitor for intravital imaging in small mammals.
Neurophotonics
January 2025
Northeastern University, Department of Bioengineering, Boston, Massachusetts, United States.
Significance: Functional brain imaging experiments in awake animals require meticulous monitoring of animal behavior to screen for spontaneous behavioral events. Although these events occur naturally, they can alter cell signaling and hemodynamic activity in the brain and confound functional brain imaging measurements.
Aim: We developed a centralized, user-friendly, and stand-alone platform that includes an animal fixation frame, compact peripheral sensors, and a portable data acquisition system.
Design of Microstrip Antenna Integrating 24 GHz and 77 GHz Compact High-Gain Arrays.
Sensors (Basel)
January 2025
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
The swift advancement of contemporary communication technology, along with the development of radar systems, has raised the requirements for antenna systems. In this work, an integrated array antenna operating in the 24 GHz and 77 GHz frequency bands is proposed. The microstrip antenna array element uses a width reduction approach to reduce its volume by 39.
View Article and Find Full Text PDFA Compact Broadband Common-Aperture Dual-Polarized Antenna for Drone Applications.
Micromachines (Basel)
December 2024
College of Electronic and Electrical Engineering, Henan Normal University, Xinxiang 453600, China.
A novel common-aperture miniaturized antenna with wideband and dual-polarized characteristics is proposed, which consists of a circularly polarized (CP) and a linearly polarized (LP) antenna. The circularly polarized antenna stacked on the upper layer adopts asymmetrical ground and introduces the patch and T-type feed network. On this basis, the meshed reflector structure, which also works as a ground plane for the LP antenna, is added to reduce the influence on circular polarization and achieve directional radiation.
View Article and Find Full Text PDFMicrospectrometer-Enabled Real-Time Concentration Monitoring in the Microfluidic Protein Enrichment Chip.
Biosensors (Basel)
December 2024
Department of Mechanical Engineering and Advanced Institute of Manufacturing for High-Tech Innovations, National Chung Cheng University, Chia-Yi 62102, Taiwan.
This study presents a novel microspectrometer-integrated microfluidic system for real-time protein concentration monitoring. The device employs electrokinetic principles for efficient protein preconcentration in a PDMS and Nafion film channel. Using FITC-labeled BSA as a model protein, the system demonstrated a linear correlation between protein concentration and absorbance at 491 nm.
View Article and Find Full Text PDFCompact inverse designed vertical coupler with bottom reflector for sub-decibel fiber-to-chip coupling on silicon on insulator platform.
Sci Rep
January 2025
Institute for Functional Matter and Quantum Technologies, University of Stuttgart, 70569, Stuttgart, Germany.
Inverse design via topology optimization has led to innovations in integrated photonics and offers a promising way for designing high-efficiency on-chip couplers with a minimal footprint. In this work, we exploit topology optimization to design a compact vertical coupler incorporating a bottom reflector, which achieves sub-decibel coupling efficiency on the 220-nm silicon-on-insulator platform. The final design of the vertical coupler yields a predicted coupling efficiency of -0.
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