SAW components
Extremely low-profile band rejection filters for mobile TV
November 9, 2010
TDK-EPC, a group company of the TDK Corporation, presents a low-profile band rejection
filter from EPCOS for mobile TV under the Japanese ISDB-T set of digital TV standard. In a
miniature 1411 SMD package (1.4 x 1.1 x 0.4 mm³) the new B8740 features one of the
world’s lowest package height. This allows manufacturers to integrate the filter into compact
mobile phones that must support an increasing number of services and functions, including
mobile telephony and broadcast services.
Thanks to its excellent electrical characteristics, the B8740 offers a high selectivity of the
channels used. The usable bandwidth for TV reception is 300 MHz in the passband between
470 and 770 MHz. In this range the new filter achieves a low maximum insertion loss of
2.7 dB. Its group delay ripple is 6 ns.
The rejection frequencies are 824 to 840 MHz and 898 to 925 MHz. With these characteristics the B8740 is very well suited for undisturbed mobile TV reception.
----Glossary
 ISDB-T: designates terrestrial digital television under the Japanese ISDB (Integrated Services
Digital Broadcasting) standard. The 1seg service under ISDB-T is specialized for mobile reception
in TV bands on mobile phones, notebook computers and in vehicles with a minimized data rate.
Main applications
 TV reception in mobile phones under the Japanese ISDB-T standard for digital TV.
Main features and benefits




Low package height of 0.45 mm (max.)
Low insertion loss of 2.7 dB (max.)
Low group delay ripple
RoHS-compatible
Key data
Case size / Series
Max. insertion loss at 470 to 710 MHz [dB]
Max. insertion loss at 710 to 770 MHz [dB]
Rejection frequencies [MHz]
Group delay ripple (p-p) at 470 to 770 MHz [ns]
1411 / B8740
1.7
2.7
824 to 840 /
898 to 925
6
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TDK-EPC Corporation
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About TDK-EPC Corporation
TDK-EPC Corporation (TDK-EPC), a TDK group company, is a leading manufacturer of electronic
components, modules and systems headquartered in Tokyo, Japan. TDK-EPC has emerged from the
combination of the electronic components business of TDK and the EPCOS Group and markets its
products under the product brands, TDK and EPCOS.
The product portfolio includes ceramic, aluminum electrolytic and film capacitors, ferrites and inductors, high-frequency components such as surface acoustic wave (SAW) filter products and modules,
piezo and protection components, and sensors. With this product spectrum TDK-EPC offers a broad
range of products and solutions of outstanding value from a single source and focuses on demanding
markets in the areas of information and communication technology and automotive, industrial and
consumer electronics. The company has design and manufacturing locations and sales offices in Asia,
Europe, and in North and South America.
----You can download this text and associated images from www.epcos.com/pressreleases.
Further information on the product can be found under www.epcos.com/mobile_tv.
Please forward reader inquiries to marketing.communications@epcos.com.
----Contacts for regional media
Region
Contact
Phone
Mail
ASEAN
Ms. A. LIEW
EPCOS PTE LTD
SINGAPORE
+65 6845-7923
angelia.liew@epcos.com
Greater
China
Ms. S. SUEN
EPCOS LTD
HONG KONG
+852 3669-8224
stella.suen@epcos.com
Europe
Mr. C. JEHLE
EPCOS
Munich/ GERMANY
+49 89 636-24 615
christoph.jehle@epcos.com
India
Mr. D. SAWANT
EPCOS India Private Ltd.
Mumbai/ INDIA
+91 22 4256 0601
deepak.sawant@epcos.com
North
America
Ms. S. McSHEA
EPCOS Inc.
Greenville, SC/ USA
+1 864 232-4240
mcsheacp4@aol.com
South
America
Mr. C. DALL’AGNOL
EPCOS do Brasil Ltda.
Gravataí/ BRAZIL
+55 51 3484-7158
candido.dallagnol@epcos.com
TDK-EPC Corporation
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