BS EN IEC 62604-2:2018 concerns duplexers which can separate receiving signals from transmitting signals and are key components for two-way radio communications, and which are generally used in mobile phone systems compliant with CDMA systems such as N-CDMA in second generation mobile telecommunication systems (2G), W-CDMA / UMTS (3G) or LTE (4G). While in 2G systems mainly dielectric duplexers have been used, the ongoing miniaturization in 3G and 4G mobile communication systems promoted the development and application of acoustic wave duplexers due to their small size, light weight and good electrical performance. While standard surface acoustic wave (SAW) duplexers have been employed for applications with moderate requirements regarding the steepness of individual filters, applications with narrow duplex gap (e.g. Bands 2, 3, 8, 25), i.e. the frequency gap between receiving and transmitting bands, require the application of temperature-compensated (TC) SAW or bulk acoustic wave (BAW) technology, because of their better temperature characteristics and resonator Q-factors.


Cross References:
IEC 60862-1:2015
IEC 62575-1:2015
EN 62575-1 (IEC 62575-1:2015) AS
EN 60862-1 (IEC 60862-1:2015) AS
EN 62047-7 (IEC 62047-7:2011) AS
IEC 61019-2:2005
IEC 61019-1:2004
IEC 60862-2:2012
EN 60862-2 (IEC 60862-2:2012) AS
EN 61019-2 (IEC 61019-2:2005) AS
IEC 62047-7:2011
EN 61019-1 (IEC 61019-1:2004) AS
EN 62575-2 (IEC 62575-2:2012) AS
IEC 62575-2:2012


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