TIDUF12 December   2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 Devices
        1. 2.3.1.1 AWR2243
        2. 2.3.1.2 AM2732R
        3. 2.3.1.3 LP876242-Q1
        4. 2.3.1.4 LM62460-Q1
        5. 2.3.1.5 TCAN1043A-Q1
        6. 2.3.1.6 TCAN1044A-Q1
        7. 2.3.1.7 DP83TC812-Q1
        8. 2.3.1.8 TPS61379-Q1
        9. 2.3.1.9 TMP102-Q1
  8. 3System Design Theory
  9. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Test Setup
      1. 4.2.1 Virtual Antenna Array
    3. 4.3 Test Results
      1. 4.3.1 Angle Resolution Measurement
  10. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
      3. 5.1.3 PCB Layout Recommendations
        1. 5.1.3.1 20 GHz (FMCW) RF LO Sync
        2. 5.1.3.2 PCB Layer Stackup
        3. 5.1.3.3 Board Photos
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks

1 System Description

High resolution images of vehicle surroundings are a requirement for many automotive safety systems. This cascade radar reference design addresses these concerns by combining two 76- to 81-GHz radar transceivers, a radar processor, two CAN-FD PHYs, an Ethernet PHY and a low noise power supply. The only two connections that the system requires are the battery power input and CAN-FD or Ethernet for data output.

The radar section of this design utilizes a printed-circuit-board (PCB) etched antenna with 6 transmit elements and 8 receive elements. By using this antenna, a modulated chirp is transmitted and reflections are sampled into the onboard digital signal processor (DSP). With this information, the sensor can record distance, angle, and velocity measurements from objects within the antenna field of view. The design offers a feature to write out the object data to a central electronic control unit (ECU) on the CAN-FD bus at a rate of 5 Mb/s, raw data to the LVDS port, or any data up to 100 Mb/s over Ethernet PHY.