Work

Exploiting Filter Stopband for Radio Frequency Interferometer Operation

Year: 2015

Type: article

Abstract: We propose to exploit filter stopband for high sensitivity radio frequency (RF) interferometer operation by utilizing reflection scattering parameters. Combined with passband filter operation, the modified RF interferometer effectively expands its frequency coverage. A simple model is described to analyze and predict interferometer performance. A high-pass filter and a low-pass filter are designed and built to demonstrate the interferometer operation as well as to verify the model over a frequency of 1-4 GHz. Lossy materials are shown to significantly degrade filter sensitivity enhancement effects due to reduced group delay and lower RF fields. Further work is needed to address the issue.

Source: IEEE Sensors Journal

DOI: 10.1109/jsen.2015.2449731

Authors: Yongzhi Shao, Zhe Chen, Pingshan Wang

Institution: Clemson University

Language: English

Topic: Microwave and Dielectric Measurement Techniques

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: National Institutes of Health, National Institute of General Medical Sciences, Division of Chemistry

Awards: G1818495039, Label-free RF Imaging of Cell Membrane Heterogeneity in Liquid