Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

HackRF One SDR EMI Shield installation

HackRF One SDR EMI Shield installation

In September 2014 I pre ordered a HackRF One SDR radio from Passion Radio Shop and on the 13th March 2015 it arrived!

Initial testing with the HackRF showed that it was being swamped with external RF from nearby transmitters. Approximately one mile from my home is a large transmission array which has a local radio stations transmitter which is outputting 2000W and also a number of other emergency service and other private transmitters which are transmitting on a wide section of the RF spectrum. Even with the antenna disconnected there was a lot of background noise and interference.

After searching online I found a company called NooElec who sell a HackRF One – RF Shield and Component Kit which they say helps to reduce stray EMI on the HackRF receiver. I ordered the kit and it arrived after a couple of weeks.

HackRF One Case HackRF One PCB Kit Contents

Installing the kit was very straightforward and after carefully opening the plastic case we soldered the RF shield outside frame to the pads on the PCB and then fitted the RF shield top.

The kit also included a ground clip test point which was soldered to the top of the PCB on the pad provided and also a 20 position female header which fits in the P30 location on the board.

RF Shield Edge Fitted RF Shield Top Fitted GND Clip Testpoint fitted

After fitting the shield we tried various frequencies to see if the noise floor was any lower but this didn’t appear to be different to when the shield was not fitted.

In the air band frequencies there was a small improvement on reception from the local airport (Bournemouth) but on the 70cm ham band (430Mhz to 440Mhz the interference from other local transmitters seemed to be the same.

We are now planning to make a custom metal case and a low noise switchable preamplifier for the HackRF One to replace the plastic case and we hope that the metal enclosure and preamp will improve the reception and external EMI noise issues.

   
Header Socket fitted    

 

More Articles to Read

ESP8266 Weather Station Projects
ESP8266 Weather Station Projects
Single tube Lethal Nixie clock
Single tube Lethal Nixie clock
How to make a simple 1 watt audio amplifier (LM386 based)
How to make a simple 1 watt audio amplifier (LM386 based)
Flashing Binaries to DRA7xx Factory Boards Using Device Firmware Upgrade
Flashing Binaries to DRA7xx Factory Boards Using Device Firmware Upgrade
Dot² isn’t your typical coffee table
Dot² isn’t your typical coffee table
Debugging ARM Cortex-M0+ HardFaults
Debugging ARM Cortex-M0+ HardFaults
EMP Jammer build
EMP Jammer build
A 3D-printed e-drum pad
A 3D-printed e-drum pad
Interactive geodesic LED dome = extreme geometric fun!
Interactive geodesic LED dome = extreme geometric fun!
Guide to build your 3.3v power supply
Guide to build your 3.3v power supply

Top




Shares