Active Control of RF Splitter Isolation by Superimposing Bias Current

作者：Aoyama Takanobu^*; Shibata Yoshiki; Kanie Tomohiko; Takeo Takashi

来源：IEICE TRANSACTIONS ON ELECTRONICS, 2012, E95C(7): 1297-1299.

DOI：10.1587/transele.E95.C.1297

• active control
• RF splitter
• isolation
• bias current

The authors propose a new method of controlling the isolation of an RF splitter. In the proposed method, a bias current is superimposed on an RF signal to change the permeability of the ferrite core used in the splitter%26apos;s transformer. By doing this, the splitter isolation can be controlled. Experimental results have shown that superimposing a bias current of 500 mA improves device isolation by about 5 dB without affecting the loss characteristics.

• 出版日期2012-7