PAN1322
Application Note
50
Revision 1.2, 2013-12-18
Design Guide
8
Antenna
The manufacturer of the antenna is Murata. The model number is LDA21K.
The antenna having 50 ohm impedance has been matched on the module to have good efficiency, and
enabling the full power of the Bluetooth chip. The matching also assures that the best receiver
sensitivity is achieved.
Even if the antenna is onboard of the module there are some considerations to make for the PCB
layout, see chapter
Figure 20. Radiation patterns of the built in antenna.