| 摘要 |
Described herein are a transient event detector ( 35 ) comprising electrical circuitry ( 50 ) suitable to detect a transient event, and a container ( 34 ) having a wall with at least two electrically conductive contacts ( 23, 44 ) electrically connected to the electrical circuitry ( 50 ), each of the at least two electrically conductive contacts ( 23, 44 ) being electrically isolated from each other, and a movable electrically conductive piece ( 36 ) that intermittently connects at least two of the at least two electrically conductive contacts when the electrically conductive piece ( 36 ) is in motion. An RF circuit ( 54 ) couples to a loop antenna ( 25 ) having a tuning capacitor ( 26 ) formed as conductive pads ( 26', 26 '') juxtaposed on opposing sides of a planar dielectric substrate ( 92 ). The tuning capacitor ( 26 ) has a hole ( 27 ) through it, and the hole has a size that is selected to cause the loop antenna ( 25 ) to exhibit a desired resonance frequency.
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