Measuring sensor with at least one SAW (surface acoustic wave) element
First Claim
1. A measuring sensor comprising at least one SAW element (20) serving as sensor and/or identification unit and having a housing part (10) forming essentially a coaxial conductor into which the SAW element (20) is installed in a contactless manner, and whereby said housing part is connected to the shield (13) of the connection cable whose signal conductor (12) extends in a contactless manner at least in the center across a superficial coupling structure (213, 214) of the SAW element (20), and whereby said signal conductor serves as near-field coupling of the electromagnetic field in the coaxial conductor with the SAW element (20), wherein the coupling structure (213, 214) of the SAW element (20) is provided with additively coupling partial structures, which are arranged at both sides of the signal conductor (12).
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Accused Products
Abstract
A measuring sensor comprises at least one SAW (surface acoustic wave) element (20) serving as a sensor and identification unit, which is installed in a contactless manner inside a housing part (10) forming, in essence, a coaxial conductor. The housing part (10) is connected to the shield (13) of the connection cable whose signal conductor (12) extends in a contactless manner over a superficial coupling structure of the SAW element (20) without contact. In order to improve the near-field coupling, the coupling structure of the SAW element (20) comprises additively coupling partial structures, which are arranged on both sides of the signal conductor (12) and which, preferably with at least one strip conductor, encircle, at least for the most part, the SAW element (20) in the peripheral area, and which serve as an integrated discharge loop for pyroelectric charges.
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Citations
6 Claims
- 1. A measuring sensor comprising at least one SAW element (20) serving as sensor and/or identification unit and having a housing part (10) forming essentially a coaxial conductor into which the SAW element (20) is installed in a contactless manner, and whereby said housing part is connected to the shield (13) of the connection cable whose signal conductor (12) extends in a contactless manner at least in the center across a superficial coupling structure (213, 214) of the SAW element (20), and whereby said signal conductor serves as near-field coupling of the electromagnetic field in the coaxial conductor with the SAW element (20), wherein the coupling structure (213, 214) of the SAW element (20) is provided with additively coupling partial structures, which are arranged at both sides of the signal conductor (12).
Specification