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Trimmer / Variable Capacitors DFD PROTECTION & FILTER
• High power capability
• 5:1 tuning range
• Higher linearity (48x)
• High quality factor (Q)
• Low leakage current
• Compatible with high voltage control IC (STHVDAC series)
• Available in WLCSP package 0.75 x 1.00 x 0.3 mm
• ECOPACK®2 compliant component
• RF tunable passive implementation in mobile phones to optimize antenna radiated performance
• Cellular antenna open loop tunable matching network in multi-band GSM/WCDMA/LTE mobile phone
• Open loop tunable RF filters
The ST integrated tunable capacitor offers excellent RF performance, low power consumption and high linearity required in adaptive RF tuning applications. The fundamental building block of PTIC is a tunable material called Parascan™, which is a version of barium strontium titanate (BST) developed by Paratek Microwave.
BST capacitors are tunable capacitors intended for use in mobile phone application and dedicated to RF tunable applications. These tunable capacitors are controlled through an extended bias voltage ranging from 1 to 24 V. The implementation of BST tunable capacitors in mobile phones enables significant improvement in terms of radiated performance making the performance almost insensitive to the external environment.
Figure 1. PTIC functional block diagram
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