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ST’s antenna tuners and tunable capacitors offer high quality and high reliability based on a ferroelectric material composed of baryum strontium and titanate (BST). The adoption of this new tunable material is a breakthrough that enables RF tunable technology to serve the mobile wireless market.

ST markets three product series, derived from its tunable technology:

  • Discrete tunable capacitors : the STPTIC devices
  • Complete antenna tuner modules : the STRAFT devices, made of tunable capacitors, combined with high-Q inductor and assembled into LGA modules
  • Tuning ciruits: the STHVDAC devices, capable of driving both STPTIC and STRAFT devices. These antenna tuning circuits can be controlled via SPI or the new radio-frequency front-end (RFFE) interface developed by the MIPI Alliance


New BST capacitance controller significantly shrinks Smart Antenna Tuning Controller

Leveraging ST’s advanced 0.18 µm BCD8 process and 0.35mm-pitch flip-chip package, the STHVDAC-253C7 high-voltage BST capacitance controller is 50% smaller than its predecessor and consumes half the operating current. In addition, the new controller requires no external Schottky diode, thereby reducing the overall circuit footprint even further.
Using the STHVDAC-253C7 with STPTIC capacitors for impedance matching and frequency tuning provides stronger signal reception, fewer dropped calls, faster data rates, and longer battery life for handset users.