RF communications apparatus and manufacturing method therefor

Communications: electrical – Condition responsive indicating system – Specific condition

Reexamination Certificate

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C340S429000, C343S741000

Reexamination Certificate

active

07109863

ABSTRACT:
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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