The 122 GHz Radar-Evaluation-Module is a complete package which allows you to directly start your own measurements. This way you can easily evaluate the new 122 GHz radar technology in your application. The 122 GHz radar sensor is integrated in a housing together with a dielectric lens providing an opening angle of the radar beam of about 2 degrees. Using a 12-wire ribbon cable, the sensor is connected to the backend, a Raspberry Pi 3 with a special connector. The backend offers a special user-friendly surface which allows you to configure the sensor and to visualize the measurement results. In the following we describe the single components in detail. As minimal configuration, you only need a USB power supply or a 5 V power bank with 2 A output current and any device with WLAN and a standard browser.
If you have any question we are happy to answer them.
The backend is based on a Raspberry Pi 3. It provides a WLAN hotspot and a web server. Communication via LAN interface is possible as well. In addition, a software is required to configure the sensor and to read the IF signals from the radar. This software is based on phython and can be provided to you. This way you can implement your own changes as well. Alternatively, we can support you in adopting the signal processing for your application in the framework of a development contract.
A special connector enables to contact the Raspberry Pi 3 with the 122 GHz radar sensor. The communication is based on an SPI bus which easily allows you to use your own backend to communicate with the sensor if desired.
All additional interfaces provided by the 122 GHz radar sensor can be seen on the following page.
The web server modus allows configuration of the radar sensor and displays its output signals. In addition, a simple signal processing without any sophisticated algorithm shows the resulting spectrum and the detected targets. For further testing the web server also allows to store the measurements in HDF5 format. This allows offline processing and optimization for your application. The backend software is primarily implemented in python for a fast and easy scalability.
To allow a fast measurement readout from the radar sensor via WLAN or LAN, the backend supports UDP streaming of the raw measurement data. This way, nearly any software can operate the radar sensor module and you can receive the measured data in MATLAB, c#, Python, Java, … on any computer in the same network.
To start this modus, you just have to start a “send script” as shown on the figure on the right. A similar script must be started on the computer to initiate data reception there.
To allow integration of the radar sensor into your application usually special combinations of housing with lenses are required. We offer a selection of housing variants (metallic and 3D printed plastic). Depending on the complexity of the application and the environment the integration into the housing and the dimensioning of the lens might have to be considered in more detail.
Ted electric lens is mainly used for focusing of the radar beam. With such a lens the maximum range of the 122 GHz radar module can be enormously increased. At the same time the radar beam can be limited onto the target thus minimizing disturbance from the environment.