Data Sheet

HRF24B21AN
©2021 Honeycomb Technologies Advance Information 6 page
FIGURE 3: MICROCONTROLLER TO HRF24B21AN INTERFACE
Mounting Details
The HRF24B21AN is a surface mountable module. Module dimensions are shown in
Figure 4. The module Printed Circuit Board (PCB) is 0.032" thick with castellated
mounting holes on the edge. Figure 5 is a recommended host PCB footprint for the
HRF24B21AN. The HRF24B21AN has an integrated PCB antenna. For the best
performance, follow the mounting details shown in Figure 6. It is recommended that
the module be mounted on the edge of the host PCB and an area around the
antenna, approximately 1.2", be kept clear of metal objects. A host PCB ground plane
around the HRF24B21AN acts as a counterpoise to the PCB antenna. It is
recommended to extend the ground plane at least 0.4" around the module.
FIGURE 4: MODULE DETAILS