ArticleApplied physics letters2015
Two-stage radio-frequency interferometer sensors.
Article in Applied physics letters, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- Auto-Tuning and Self-Calibration of High-Sensitivity Radio Frequency Interferometers.IEEE microwave and wireless components letters : a publication of the IEEE Microwave Theory and Techniques Society · 2016Article
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Authors and funding
2 authors.
Funding
Abstract
We show that simple radio-frequency (RF) interferometers can have slow-wave positive group delay (PGD) or negative group delay (NGD), as well as superluminal propagation (SP) regions, due to a destructive interference process. These properties are easily tunable, which makes RF interferometers unique among systems that have NGD and SP regimes. A two-stage interferometer arrangement, which includes a first stage interferometer in the material-under-test path of a second stage, has significantly improved sensitivity in comparison with a one-stage reference interferometer. With a power divider based first stage and at its maximum NGD frequency, the frequency sensitivity improvement is as high as 7 times. With a quadrature based first stage, the sensitivity is increased by as much as 20 times. Sensitivity improvements are also observed at PGD and SP frequency regions.
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Registered trials
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