Auto-Tuning and Self-Calibration of High-Sensitivity Radio Frequency Interferometers.
Auto-Tuning and Self-Calibration of High-Sensitivity Radio Frequency Interferometers.
复制标题
DOI：
10.1109/lmwc.2016.2615358
复制
发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
Wang P
中科院分区：
文献类型：
--
作者：
Cui Y;Wang P
我们展示了一种技术，自动调谐的灵敏度的射频（RF）干涉仪与可调液体衰减器，通过准确地改变其液体体积。在~ 5GHz频率下，该干涉仪的有效品质因数（QEFF）可达1×108。QEFF比以前报道的结果高出约100倍。当被测材料（MUT），即，甲醇-水溶液中，用于调谐，一个自校准和测量过程，从2 GHz到7.5 GHz的甲醇浓度水平下降到5×10 - 5摩尔分数，这是100倍低于以前报道的结果。需要进一步的研究，以实现更好的系统稳定性和更高的灵敏度。
We demonstrate a technique that automatically tunes the sensitivity of a radio-frequency (RF) interferometer with a tunable liquid attenuator by accurately changing its liquid volume. The obtained effective quality factor (QEFF) of the interferometer is up to 1×108 at ~5 GHz. The QEFF is ~100 times higher than previously reported results. When material-under-test (MUT), i.e., methanol-water solution in this work, is used for the tuning, a self-calibration and measurement process is demonstrated from 2 GHz to 7.5 GHz at a methanol concentration level down to 5×10−5 mole fraction, which is 100 times lower than previously reported results. Further investigations are needed to achieve better system stability and higher sensitivity.