IEC 62604-2:2022 PDF

Overview - IEC 62604-2:2022 (SAW & BAW duplexers guidelines)

IEC 62604-2:2022 provides practical guidelines for the use of surface acoustic wave (SAW) and bulk acoustic wave (BAW) duplexers of assessed quality. It covers duplexers that separate transmit (TX) and receive (RX) signals in two‑way radio communications and are commonly used in mobile phone systems (N‑CDMA/2G, W‑CDMA/UMTS/3G, LTE/4G). The standard helps users select and apply SAW and BAW duplexers by drawing attention to fundamental design and operational questions to consider before placing orders, reducing the risk of unsatisfactory performance.

Key technical topics and requirements

• Scope and purpose

  • Guidelines for selection, use and measurement of SAW and BAW duplexers in mobile systems.
  • Treats SAW and BAW duplexers together because they share use cases and characteristic requirements.

• Performance characteristics covered

  • Centre frequency, pass bandwidth, insertion loss (insertion attenuation), and isolation between TX and RX ports.
  • Typical TX and RX filter responses and isolation behavior over frequency.
  • Considerations for duplex gap (narrow gaps may favour TC‑SAW or BAW).

• Design and measurement topics

  • Basic function, structure and operation of duplexers, diplexers and multiplexers.
  • Cross‑isolation (new term added in this edition) and other terms/definitions.
  • Power durability, harmonics and inter‑modulation distortion, electrostatic protection, and measurement methods (e.g., four‑port network analyzer setups).
  • Practical elements such as phase shifters, balanced RX ports, and multiplexer configurations (multiplexers described in this edition).

• Standardization and ordering

  • Encourages selection from standardized performance specifications (centre frequency, bandwidth, attenuation, isolation) to simplify integration.

Practical applications and who uses this standard

IEC 62604-2:2022 is directly applicable to:

• RF engineers and antenna/system designers integrating duplexers into mobile handsets, modules, and base stations.
• Component engineers specifying SAW/BAW duplexers for LTE, UMTS, CDMA and related FDD systems.
• Procurement and quality teams evaluating supplier datasheets and test reports.
• Test laboratories and certification bodies performing duplexer characterization and compliance testing.

Use cases include minimizing TX–RX interference in mobile devices, choosing appropriate technology (SAW vs BAW) for narrow duplex gaps, and specifying test setups and durability criteria for production acceptance.

Related standards

• Other parts of the IEC 62604 series (surface acoustic wave and bulk acoustic wave duplexers of assessed quality) provide complementary specifications and test methods. Users should consult the full series and manufacturer detail specifications for complete technical requirements.