The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. Stroobandt, ON4AA Copyright 2019–2020, licensed under Creative Commons BY-NC-SA (you can use any line.) If you want, you can disconnect the internal antenna (use shape knife!) and calculate the wavelength of 2.4Ghz.MiniVNA PRO Modifications Serge Y. If you can, connect the antenna of the Bluetooth module as shown below. I supplied power to the blouses module as shown below. The green wire and the yellow wire with the diode are RX and TX lines. My bluetooth module need 5Volt power supply, so I connected it as shown in the picture above. If your module requires 3.3Volt power, You can use the regulator on the back of the PCB. Perhaps the diodes would be okay for signaling. I thought it was the signal interference by the Bluetooth module and I decided to install the diode as below. I connected the VNA module to the PC while the Bluetooth module was connected, Communication between the PC and the VNA was not normal and the A mark displayed. When the Bluetooth module is removed, it communicated normally again. I installed Blue VNA on my smartphone and experimented. The HC-06 I have set the baud rate and bluetooth name by the following command. Note that the settings differ for each Bluetooth module.!!! My Bluetooth module is about $ 3, so I checked the manual and confirmed that it supports 921600 speed. The logic analyzer measurement result confirmed that it is communicating at the speed of 921600. Solder the RX and TX wires as shown below.Īnd after mounting the PCB, I tested it with a logic analyzer. The Bluetooth module can be connected to the UART. The FTDI chip makes the effort to transfer the UART signal from the main controller(AT Mega) to the computer (USB Port). The FTDI (TTL To USB - FT230XS) Chip show in upper pictuers. (I easily found the hidden screw below sticker) I tried simple test about function of VNA with computer, It worked perfectly. VNA as 2 RF Connector and 1 mini USB Connector. VNA Set includes a special case (well designed small plastic case), VNA, Calibration Set (0ohm, open, 50ohm), and 2 cables. The VNA module was ordered by AliExpress and arrived about two weeks later.
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