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Kyocera發表SD25系列(英文內容)
(產品新聞, 2007年3月5日)
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Kyocera Corporation has developed a lightweight Surface Acoustic Wave (SAW) Duplexer with a built-in matching circuit featuring improved attenuation and isolation characteristics. Production is scheduled to commence in April 2007 at Kokubu Plant in Kagoshima Japan, with monthly output of one million units.
The Duplexer is a component that is used in an antenna circuit, to enable duplex and simultaneous conversation by discriminating transmitting and receiving signals. It is mainly used in the circuits of a CDMA system, where it is a critical component that determines telephone speech quality.
Recently, mobile handsets have required numerous functions and high performance, including slim design, compact body, camera, high-resolution and large LCD, high-speed data transmission, and multiple bands. The electronic components being mounted in terminals also need to be more integrated, smaller and lighter, resistant to temperature change, vibration and shock as well as highly reliable.
Low Temperature Co-fired Ceramics (LTCC) is used as ceramic substrate. It allows an inductor for a matching circuit to be incorporated. As a result, the SD25 series requires no external inductor that is normally used for a matching circuit. This helps simplify circuit design while reducing the number of components and saving the component assembly space. "It is to reduce the size of mounting area by approximately 20% on average," says the Kyocera's marketing division of Electronic Components Division.
http://global.kyocera.com/prdct/electro/newitem/index.html
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