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SV1AFN's $30 RF Switch

A project log for Open Ground Penetrating Radar

Make the invisible visible for about $500.

Glenn Powers 08/11/2015 at 02:500 Comments

HMC784 - 10W RF SPDT Switch, LF to 4000 MHZ (4 GHZ), 30 dB Isolation, 15-40 nSec switching times, Very Low DC current - Good IMD3 (+60 dBm)

https://www.sv1afn.com/hmc784_trswitch.html

This uses the same chip as the eval board from DigiKey for $138.75 and includes a hex inverter for single wire control!

Plus, the DC blocking capacitors are unpopulated. So, you can select the best values for the frequency you are using. Here is a brief discussion on picking the best values for the caps.

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