Miniature SMD Saw Filters Suite Mobile Phone Applications

Oct. 13, 2003
The WF SAW filters for North American mobile phone standards feature low insertion loss (1.6 to 3 dB) in an SMD plastic package measuring just 2.5 by 2.0 by 1.15 mm. The 836.5/881.5-MHz WF617A/B for GSM850 (Tx/Rx) applications operates from...

The WF SAW filters for North American mobile phone standards feature low insertion loss (1.6 to 3 dB) in an SMD plastic package measuring just 2.5 by 2.0 by 1.15 mm. The 836.5/881.5-MHz WF617A/B for GSM850 (Tx/Rx) applications operates from −30°C to 85°C. The 881.5-MHz WF642B for GSM850 (Rx) applications functions in the −20°C to 70°C range. The 1880/1960-MHz WF627A/B for PCS (Tx) applications operates over −40°C to 85°C, while the 1960-MHz WF679B for PCS1960 (Rx) applications can go from −20°C to 70°C. Also, the 1575.42-MHz WF619H/D for GPS (Rx) applications operates from −30°C to 85°C. All are lead-free. The WF617 costs $0.45 each in 10,000-unit lots, with delivery from eight to 10 weeks. Other popular frequencies are in stock.

NDK (Nihon Dempa Kogyo) Co. Ltd.www.ndk.com; (800) NDK-XTAL
About the Author

Roger Allan

Roger Allan is an electronics journalism veteran, and served as Electronic Design's Executive Editor for 15 of those years. He has covered just about every technology beat from semiconductors, components, packaging and power devices, to communications, test and measurement, automotive electronics, robotics, medical electronics, military electronics, robotics, and industrial electronics. His specialties include MEMS and nanoelectronics technologies. He is a contributor to the McGraw Hill Annual Encyclopedia of Science and Technology. He is also a Life Senior Member of the IEEE and holds a BSEE from New York University's School of Engineering and Science. Roger has worked for major electronics magazines besides Electronic Design, including the IEEE Spectrum, Electronics, EDN, Electronic Products, and the British New Scientist. He also has working experience in the electronics industry as a design engineer in filters, power supplies and control systems.

After his retirement from Electronic Design Magazine, He has been extensively contributing articles for Penton’s Electronic Design, Power Electronics Technology, Energy Efficiency and Technology (EE&T) and Microwaves RF Magazine, covering all of the aforementioned electronics segments as well as energy efficiency, harvesting and related technologies. He has also contributed articles to other electronics technology magazines worldwide.

He is a “jack of all trades and a master in leading-edge technologies” like MEMS, nanolectronics, autonomous vehicles, artificial intelligence, military electronics, biometrics, implantable medical devices, and energy harvesting and related technologies.

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