LoRa RF Switch Schematic Review and PCB layout
Budget: $250 – $750 USD
I have a dual-band RF switch already drafted in Altium that lets one shared antenna handle both 433 MHz (primary) and 470 MHz LoRaWAN links. Before moving on to the board, I need fresh expert eyes on the schematic.
You will receive the design as a PDF export. I’m most concerned about three areas:
• Signal switching accuracy – verify the detector logic reliably senses the 470 MHz burst and that insertion loss, isolation, and TX/RX paths stay within spec on both bands.
• Component placement – confirm the RF switch IC, matching network, SAW filters and biasing parts are arranged to minimise parasitics and avoid crosstalk.
• Power management – check the regulator choices, decoupling strategy, and any GPIO level-shifting that could introduce noise or delay.
Please return concise, point-by-point comments (annotated PDF or separate note) plus any recommended changes to values, footprints or topology. If your feedback helps lock the schematic, I’ll hand the full PCB layout phase to you as a follow-on project in Altium.
Let me know your turnaround time and any RF analysis tools you plan to use (ADS, CST, Altium Simulator, etc.) so I can gauge compatibility with my workflow.
You will receive the design as a PDF export. I’m most concerned about three areas:
• Signal switching accuracy – verify the detector logic reliably senses the 470 MHz burst and that insertion loss, isolation, and TX/RX paths stay within spec on both bands.
• Component placement – confirm the RF switch IC, matching network, SAW filters and biasing parts are arranged to minimise parasitics and avoid crosstalk.
• Power management – check the regulator choices, decoupling strategy, and any GPIO level-shifting that could introduce noise or delay.
Please return concise, point-by-point comments (annotated PDF or separate note) plus any recommended changes to values, footprints or topology. If your feedback helps lock the schematic, I’ll hand the full PCB layout phase to you as a follow-on project in Altium.
Let me know your turnaround time and any RF analysis tools you plan to use (ADS, CST, Altium Simulator, etc.) so I can gauge compatibility with my workflow.