Wideband RF Switch (5 – 3000 MHz)

Photo: Aditya Mukherjee

In an application it was required to use 6 different antennas at 6 nearby locations one at a time as the Bluetooth/WiFi antenna for an Asus Tinker Board or any similar single board computer with a detachable RF front end (also a modified Raspberry Pi). To serve that purpose this 6 way switch was designed and built. It has one common port which is connected to the RF port on the Tinker board and 6 selectable ports to connect the antennas. To power the device and select the port it has a 10 pin FRC connector which plugs into the GPIO strip of the Tinker board through a FRC to female header converter. One among the 6 selectable ports is selected by setting a particular bit pattern in its 3 bit control channel (excluding 000 & 111). The response time for RF switching is around 5 microseconds.

A single monolithic component is used for the switching purpose which greatly reduced the BOM, PCB area, dev time and design complexity – RFSW6062 by Qorvo.

Entire board is matched to 50 Ohm

Features:

  • 5 MHz to 3000 MHz operation
  • Excellent insertion loss and decent isolation performance
  • Compatible with 3.3V logic
  • No DC blocking
  • 2000V HBM ESD Rating on All Ports
  • 3V to 5V operation
  • Low power device (≈100μA current draw)
  • Source: LINK


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Wideband RF Switch (5 – 3000 MHz)

Photo: Aditya Mukherjee In an application it was required to use 6 different antennas at 6 nearby locations one at a time as the Bluetooth/WiFi antenna for an Asus Tinker Board or any similar single board computer with a detachable RF front… Read more


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