SPRACX7 April   2021 AWR1243 , AWR1443 , AWR1642 , AWR1843 , AWR1843AOP , AWR2243 , AWR2944 , AWR6843 , AWR6843AOP , IWR1443 , IWR1642 , IWR1843 , IWR6443 , IWR6843 , IWR6843AOP

 

  1.   Abstract
  2.   Trademarks
  3. 1Sensor RF Performance Validation
    1. 1.1 Basic Power-on Checks
    2. 1.2 Factory Calibrations
      1. 1.2.1 Antenna Beam Tilt Measurement
      2. 1.2.2 Range Bias and Receiver Channel Gain/Offset Compensation
    3. 1.3 Parametric Tests
      1. 1.3.1 Transmitter-Receiver Loopback SNR
    4. 1.4 Golden Sensor Unit
  4. 2Low-Cost Manufacturing Setup
    1. 2.1 Hardware
      1. 2.1.1 Low Cost Bench Top Anechoic Chamber
    2. 2.2 Software
  5. 3Advanced Test Setup
    1. 3.1 Target Simulator Setup
  6. 4References

2.1 Hardware

The hardware for testing Radar is shown below. It comprises of the following components:

  • Anechoic chamber with turn-table
  • Corner reflector
  • DC supply with ammeter
  • Computer for data & control interface to the Radar unit and also for controlling the turn-table

GUID-38E57C35-ACF5-4375-9EB5-900CA7D846E6-low.png Figure 2-2 Hardware for Basic Radar Testing

The width and height of anechoic chamber can be typically with W ˟ H = 60 cm ˟ 60 cm. The length of the chamber should be such that the corner reflector can be placed well in far-field zone. The formula given below can be used to calculate the far-field zone.

Minimum Far-field distance, d = 2.D2 / λ

Where D is the maximum dimension of the antenna array,

λ is the wavelength of the signal in air.

For example, a radar designed using a single mmWave sensor operating in 76-77GHz band with an antenna array that spans 24 mm will have d = 295 mm. After allowing space for turn-table and corner reflector and cabling, a 60-cm long chamber should suffice to test this Radar.