However, with an increase in a , the curve of the frequency response tends to be flat, and the damping ratio ζ has an increasing trend, which means that the physical size of antenna can affect damping ratio ζ.
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A Highly Sensitive and Miniature Optical Fiber Sensor for Electromagnetic Pulse Fields.
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The sentences
Meanwhile, compared with the resonance spike of these curves in Figure 7 b, it can be observed that the resonance peak of the curve becomes more obvious with an increase in h ; that is, the damping ratio ζ shows a decreasing trend.