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MRF24WB0MB データシート(PDF) 9 Page - Microchip Technology |
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MRF24WB0MB データシート(HTML) 9 Page - Microchip Technology |
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9 / 38 page  2010-2013 Microchip Technology Inc. DS70632C-page 9 MRF24WB0MA/MRF24WB0MB The MRF24WB0MA has an integrated PCB antenna. For best performance, mount the module on the PCB without metal obstructions in the keep out area. The antenna is tuned to have FR4 PCB material underneath the module. Do not “cut-out” host PCB material under the antenna. Figure 1-4 shows the recommended host PCB footprint for the module. FIGURE 1-4: RECOMMENDED HOST PCB FOOTPRINT Note 1: The “Note 1” demarcation specifies the host PCB copper plane “keep-out” area on underlying board layers. Users can route surface escape traces in this area. The module has exposed copper test points on bottom side in the “keep out” zone. Ensure that there is no exposed cop- per on mounting board that may short these. |
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