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Wireless components tackle size issue in wireless apps

Posted: 27 Sep 2004 ?? ?Print Version ?Bookmark and Share

Keywords:kyocera? balance filter? chip balun?

Kyocera Corp. says its new 2.4GHz chip balance filter and 5GHz chip balun are the industry's smallest for short-range wireless communications. The company's 2.4GHz chip balance filter measures 2-by-1.25-by-0.85mm, while the 5GHz chip balun sports a package size of 1.6-by-0.8-by-0.6 mm. The devices also feature low insertion loss and high attenuation characteristics.

According to the company, the balun is essential to two-way conversion between balanced and unbalanced circuits, while the balance filter is a combination of a balun with a bandpass filter, which allows only necessary signals to pass through.

Kyocera said it was able to miniaturize the devices by using its proprietary high dielectric and high Q ceramic material and technology in combination with its high frequency circuit design techniques.

Key features of the devices are their low insertion loss and high attenuation characteristics. By revising the circuit configuration and optimizing the resonator circuitry, the balance filter offers an insertion loss of 2.3dB maximum with attenuation at 30dB minimum in the 1,720MHz to 1,910MHz range. The new balance filter produces a performance comparable to that of the current mainstream device (2.5-by-2mm) in a smaller package.

Available in the frequency range of 4,900MHz to 5,950MHz, the new balun offers an insertion loss of 1.2dB (max.). This was achieved by revising the original coil design pattern, said the company. Electrical characteristics are guaranteed over the temperature range of -40C to 85C. The devices are in compliance with green procurement standards, the lead-free requirement and RoHS Directive.

For additional electrical specifications and frequency characteristics, visit the company's website.

Pricing for samples is $1 per unit. Volume production for both products will begin next month at a rate of one million units per month at Kyocera's Kagoshima Kokubu plant.

- Gina Roos


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