意法半导体的天线调谐器和可调电容采用由钡锶与钛酸(BST)组成的铁电材料制成,具有质量高和可靠性高的特点。应用这种新型可调材料是一大突破,让RF可调技术能够服务移动无线市场。

意法半导体提供3个基于该可调技术的产品系列:

  • 分立式可调电容器:STPTIC器件
  • 完整的天线调谐器模块:STRAFT器件,由可调电容器制成,整合了高质量电感器,并且被装配到LGA模块中
  • 调谐电路:STHVDAC器件,能够驱动STPTIC和STRAFT器件。这些天线调谐电路可以通过SPI或MIPI联盟开发的新型射频前端(RFFE)接口进行控制

New antenna-tuning circuit boosts LTE smartphone performance

ST’s STHVDAC-253M integrates three high-voltage DACs, allowing it to simultaneously optimize antenna performance in three different frequency bands. It supports all MIPI RFFE features such as extended mode, triggers, 26 MHz clock operation, and brings stronger signal/more bars, fewer dropped calls, faster downloads, and longer battery life. Housed in a flip-chip 0.4 mm pitch package, the STHVDAC-253M embodies the best-in-class antenna performance in a compact and cost-effective solution. 

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