Publication details
| Publication CODE |
Title |
| NBN EN IEC 62604-2:2018 (2018-03) |
SURFACE ACOUSTIC WAVE (SAW) AND BULK ACOUSTIC WAVE (BAW) DUPLEXERS OF ASSESSED QUALITY - PART 2: GUIDELINES FOR THE USE |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
25.00 €
|
3. |
Description
This part of IEC 62604 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.
It is neither the aim of these guidelines to explain theory, nor to attempt to cover all the eventualities which may arise in practical circumstances. These guidelines draw attention to some of the more fundamental questions, which should be considered by the user before he places an order for SAW and BAW duplexers for a new application. Such a procedure will be the user's insurance against unsatisfactory performance. Because SAW and BAW duplexers have very similar performance for the usage, it is useful and convenient for users that both duplexers are described in one standard.
Standard specifications, such as those of IEC, of which these guidelines form a part, and national specifications or detail specifications issued by manufacturers will define the available combinations of centre frequency, pass bandwidth and insertion attenuation for each
sort of transmitting and receiving filters and the isolation level between transmitter and receiver ports, etc. These specifications are compiled to include a wide range of SAW and BAW duplexers with standardized performances. It cannot be over-emphasized that the user should, wherever possible, select his duplexers from these specifications, when available, even if it may lead to making small modifications to his circuit to enable the use of standard duplexers. This applies particularly to the selection of the nominal frequency band.
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| Class |
C
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Available files
ATTENTION: Belgian registered standards (NBN EN or NBN HD) are generally
only available in English or French. Only the cover page is translated
and the document itself is in English or in French.
Very important notice: 98% of the text of the NBN EN 55XXX,
NBN EN 6XXXX comes from the IEC text which is NOT included.
This text can be ordered here:
IEC 62604-2:2017.
For the series NBN EN 50XXX, the standards are however complete.
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DE version
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EN version
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FR version
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|
Status
Origin
| Committee |
TC 49
SURFACE MOUNTED PIEZOELECTRIC DEVICES FOR FREQUENCY CONTROL AND SELECTION
|
| Responsible |
Monsieur DE LEEUW Thierry, Technical Officer
Diamant Building
Bd Auguste Reyers, 80
1030
BRUXELLES
Phone: +32 2 706 85 72
E-mail: thierry.deleeuw@ceb-bec.be
|
Approval
| BEC Approval |
2018-01-03 |
| NBN Approval |
2018-04-27 |
| Belgian Official Journal |
2018-06-11 |
| Registration |
185625 |
| ICS-Code (International Standards Classification) |
31.140
|
| NBN Status |
New |
|
| Date of ratification (d.o.r.) |
2018-01-03 |
| Date of availability (d.a.v.) |
2018-03-09 |
| Date of announcement (d.o.a.) |
2018-04-03 |
| Date of publication (d.o.p.) |
2018-10-03 |
| Date of withdrawal former edition (d.o.w.) |
2021-01-03 |
|
Correspondences with international standards
| Relation |
International standard |
Date |
| is identical to |
EN IEC 62604-2:2018
|
2018-03-09 |
| is identical to |
IEC 62604-2:2017
|
2017-11-29 |
Relations to belgian/foreign publications
| Type |
Origin |
Code |
Date |
| Standard |
Belgium |
NBN EN 60862-1:2015 |
|
| Standard |
Belgium |
NBN EN 62575-1:2016 |
|
|
