User's Manual

Silicon Laboratories Finland Oy
Page 16 of 51
3.8 WT11u-A Antenna Specification
WT11u-A uses a monopole type on a chip antenna with maximum gain of 0.5 dBi. The radiation pattern and the
total radiated efficiency are dependent on the layout and any metal around the antenna has an effect on the
radiation characteristics. Typically the efficiency is 30 … 50%.
Figure 4: Antenna radiation pattern in a USB dongle layout
Figure 5: Antenna radiation pattern in a USB dongle layout
WT11i-A