SWRU613 july   2023 AWRL1432

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1  XWRL1432BOOST Antenna
      1. 2.1.1 PCB Material
        1. 2.1.1.1 Transmitter and Receiver Virtual Array
    2. 2.2  EVM Mux Block Diagram
    3. 2.3  Switch Settings
    4. 2.4  LEDs
    5. 2.5  Connectors
    6. 2.6  USB Connector
    7. 2.7  DCA1000 HD Connector
    8. 2.8  Booster Pack Connector for the LaunchPad Connectivity
    9. 2.9  CANFD Connector
    10. 2.10 LIN PHY Connection
    11. 2.11 I2C Connections
      1. 2.11.1 EEPROM
    12. 2.12 XDS110 Interface
    13. 2.13 Flashing the Board
    14. 2.14 DCA1000EVM Mode
      1. 2.14.1 RDIF Interface for Raw ADC Capture
    15. 2.15 PCB Storage and Handling Recommendations:
      1. 2.15.1 PCB Storage and Handling Recommendations
      2. 2.15.2 Higher Power Demanding Applications
  8. 3Software
    1. 3.1 Software, Development Tools, and Example Code
      1. 3.1.1 XWRL1432 Demo Visualization Getting Started
  9. 4Hardware Design Files
    1. 4.1 Schematics, PCB Layout and Bill of Materials (BOM)
    2. 4.2 EVM Design Database
  10. 5Additional Information
    1.     Trademarks
  11. 6References
    1. 6.1 TI E2E Community

2.1.1.1 Transmitter and Receiver Virtual Array

Transmitter and receiver antennas positions in Figure 3-6 form a virtual array of six transmitter and receiver pairs. This allows object detections finer azimuthal angular resolution (29°) and coarse elevation angular resolution (58°). Receiver antennas are spaced at distance D (Lambda/2) and Transmitter antenna Tx1 and Tx2 spaced at 2D (lambda) in azimuthal plane and D (Lambda/2) in elevation plane. Tx1 and Tx2 are placed at D (lambda/2) in the elevation and 2D (Lambda) in azimuth plane.

GUID-74F6348B-C900-4EC0-B671-0875901E2748-low.png GUID-12045CAC-F9B0-4268-B297-1E4737CC4C7A-low.jpg Figure 2-6 Virtual Antenna Array

Figure 3-6 shows the antenna radiation pattern with regard to azimuth and Figure 3-7 shows the antenna radiation pattern with regard to elevation for TX1 and TX2. Both figures show the radiation pattern for TX1 and TX2 and RX1, RX2 and RX3 together. All of the measurements were done with a Tx and Rx combination together. Thus, for the -6dB beam width, the user must see a -12db (Tx (-6dB) + Rx(-6dB)) number from the boresight.

Note: Wavelength (Lambda) is computed based on a frequency of 78.5 GHz. Antenna placements are according to this frequency.
GUID-4A30997C-876C-476E-B373-B2F7B33BE00E-low.jpg Figure 2-7 xWRL1432BOOST EVM Azimuth Antenna Radiation Patterns

Measured azimuthal radiation pattern for all Tx to Rx pairs (Corner reflector placed at approximately 5 meters with a 4- GHz bandwidth chirp starting at 76 GHz)

GUID-FF608E7F-CC15-4B26-9B9A-C77DA2D34091-low.jpg Figure 2-8 xWRL1432BOOST EVM Elevation Antenna Radiation Patterns

Measured elevation radiation pattern for all TX to RX pairs (Corner reflector placed at approximately 5 meters with a 4-GHz bandwidth chirp starting at 76 GHz)

Note: In accordance to the EN 62311 RF exposure test, a minimum separation distance of 20 centimeters must be maintained between the user and the EVM during operation.