Overview
IEC TS 61994-2:2011 is a technical specification published by the International Electrotechnical Commission (IEC). It provides a comprehensive glossary of terms and definitions related to piezoelectric and dielectric filters, essential components used for frequency control, selection, and detection in various electronic applications. This document serves as an authoritative reference for the current state of the art in piezoelectric and dielectric filter technology, supporting IEC Technical Committee 49’s standards and documentation.
The 2011 edition is the second release of this specification and includes important updates such as revised definitions, a more structured presentation of terminology, the introduction of new terms, and illustrative drawings to aid understanding. This ensures that industry professionals, engineers, and researchers have access to a standardized vocabulary and concepts, facilitating clearer communication and efficient implementation of technologies involving piezoelectric and dielectric filters.
Key Topics
- Piezoelectric and dielectric filters terminology: The standard defines terms related to different types of filters such as band-pass, band-stop, comb filters, and their characteristics.
- Filter construction and configurations: It includes definitions related to filter design elements like interdigital transducers (IDTs), apodization, and multiphase transducers, accompanied by illustrations.
- Electrical parameters of filters: Key parameters such as coupling factor, fractional bandwidth, cut-off frequency, envelope delay time, and feedthrough signal suppression are defined, providing essential knowledge for design and evaluation.
- Frequency control and detection devices: The document links piezoelectric and dielectric filter functions to broader frequency control, selection, and detection mechanisms commonly used in electronics.
Applications
IEC TS 61994-2:2011 is instrumental across diverse fields where precise frequency control is paramount:
- Telecommunications: Utilized in the design and manufacturing of filters for signal processing, improving signal quality by selecting desired frequency bands and suppressing interference.
- Consumer electronics: Implemented in devices such as radios, smartphones, and audio equipment for frequency filtering, ensuring reliable performance.
- Industrial instrumentation: Applied in sensors and measuring instruments requiring frequency selection and control.
- Defense and aerospace: Essential in radar, navigation, and communication systems, where accurate frequency detection and filtering are critical for system reliability and security.
- Research and development: Provides a standardized framework for developing new piezoelectric and dielectric filter technologies.
Related Standards
To fully benefit from IEC TS 61994-2:2011, the following related IEC standards offer complementary technical details and guidance:
- IEC 60050-561:1991 – International Electrotechnical Vocabulary for piezoelectric devices dedicated to frequency control and selection.
- IEC 60368 Series – Specifications and guides for piezoelectric filters, including quality assessments.
- IEC 60862 Series – Generic specifications and usage guidance for surface acoustic wave (SAW) filters.
- IEC 61261-1:1994 – Quality assessment specifications for piezoelectric ceramic filters.
- IEC 61337-1:2004 – Specifications for filters using waveguide type dielectric resonators.
- IEC Electropedia – Online resource for electronic and electrical terms with over 20,000 definitions, including those on piezoelectric and dielectric devices.
Keywords: IEC TS 61994-2, piezoelectric filters, dielectric filters, frequency control, frequency selection, frequency detection, interdigital transducer, coupling factor, apodization, band-pass filter, band-stop filter, electronic filters glossary, piezoelectric devices standards, dielectric resonators, international electrotechnical standards.