GB/T 27700.2-2025 Active National standards

GB/T 27700.2-2025 Surface acoustic wave(SAW) filters of assessed quality—Part 2:Guidelines for the use

Publish Date: 2025-12-31 Implement Date: 2026-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 27700.2-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Quartz crystals, piezoelectric components

ICS Name: \nFrequency control and selection using piezoelectric devices and dielectric devices

Publish Date: 2025-12-31

Implement Date: 2026-07-01

Pages: 52 pages

Scope

This document provides practical guidance on the use of surface acoustic wave (SAW) filters in telecommunications, measurement equipment, radar systems, and consumer products. For general information, standard values, and test conditions, please refer to IEC 60862-1. SAW filters are currently widely used in fields such as television, satellite communications, fiber optics, and mobile communications. Due to the various performance indicators of these SAW filters, they can be divided into several basic categories. This document includes SAW filters of various structures, with an operating frequency range of approximately 10 MHz to 3.5 GHz and a relative bandwidth of 0.02% to 50%. The purpose of this document is not to explain the principles, nor does it attempt to cover all possible issues that may arise in actual situations. Instead, it aims to address some fundamental issues that users need to consider before ordering a SAW filter for a new application, thereby ensuring that they obtain products with performance that meets their requirements. The specifications provided in IEC 60862 (all parts) and the detailed specifications issued by manufacturers stipulate indicators such as nominal frequency, passband width, passband ripple, rectangularity coefficient, and termination impedance. These specifications list a large number of SAW filters with typical performance. It should not be overemphasized that users should always select SAW filters from these specifications in all cases. When conditions permit, users can slightly modify their circuits to enable the use of standard SAW filters, particularly with regard to the selection of nominal frequency.