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STMicroelectronics boosts 4G connections and battery life with advanced tunable chips
STMicroelectronics is working to help avoid dropped calls and increase battery life with a new range of highly miniaturised adaptive devices that dynamically optimise handset antenna performance.
ST’s new ParaScan™ Tunable Integrated Capacitors (STPTIC) are electrically adjustable to maintain efficient transfer of energy from the handset amplifier to the antenna under various operating conditions. The STPTIC helps maximise radiated RF power for better call performance, overcoming the challenges of use in multiple frequency bands, when the handset is held close to the user’s ear or when it is moved away from the head, while minimising amplifier power consumption for longer battery life.
Unlike alternatives that typically contain multiple switched capacitors, the STPTIC allows capacitance to be adjusted smoothly, without steps, for greater precision. The STPTIC is also smaller, combining a single, variable capacitor with control circuitry using ST’s Integrated Passive and Active Device (IPAD™) technology.
“Our latest and most advanced STPTIC family now delivers an even more compelling option for future 4G LTE handsets, which will demand high wireless performance for reliable voice and high-speed data communications with longer battery life” said Ricardo De-Sa-Earp, Group VP and General Manager, Application-Specific Discretes & IPAD Division. “Two of the world’s top five handset manufacturers have already chosen this technology for antenna matching in their current handsets.”
The STPTIC family announced today use the latest and most advanced generation of ParaScan Barium Strontium Titanate (BST) variable-capacitor technology. These devices meet the demands of wireless system designers by displaying high Q factor1 at frequencies up to 2.7 GHz, more than 3:1 capacitance change with varying control voltage, and stable performance over the specified temperature range. Devices are easy to design-in, requiring only minimal external components, and have high power capability meeting the requirements of the GSM standard.
Major features of the STPTIC family:
- Range of capacitance values: 2.7 to 8.2 pF
- High power capability (+36 dBm)
- High tuning range (3.5:1)
- High linearity device (IP3 > 60dB)
- High Quality factor (Q factor) up to 2.7 GHz
- Low leakage current (Less than 100 nA)
- Compatible with ST antenna tuning circuit (STHVDAC series)
The STPTIC devices are available in 6-pin microDFN and flip-chip packages.
For more information, or details on the full range of STMicroelectronics products available from Anglia, please email info@anglia.com
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This news article was originally published in February 2013.
