The RF front end for SAMR30 can be designed with a chip balun or with a discrete balun.
The reference schematic for both the types of RF frontend is available in this section.
Microchip recommends to add two pi-structures in the RF frontend between the balun
output and input to the antenna for proper impedance matching. The first pi-structure
should be used for matching the impedance from balun to a 50Ω point and the second
pi-structure should be used for matching the impedance from the antenna to a 50Ω point.
This 50Ω point can be used to place a test point that can be used during production for
conducted RF measurements.Figure 18-1. RF Frontend Section with Chip
Balun and Harmonic Filter
Figure 18-2. RF Frontend Section with
Discrete Balun and Harmonic Filter
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
