SWRU631 November   2024

 

  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 PCB Handling Recommendations
    2. 2.2 Power Connections
    3. 2.3 Connectors
      1. 2.3.1 MIPI 60-Pin Connector (J19)
        1. 2.3.1.1 MIPI TRACE ECO List
      2. 2.3.2 Debug Connector-60 pin (J7)
        1. 2.3.2.1 CSI2 FE Connector ECO List
      3. 2.3.3 Ethernet Ports (J4 and J9)
        1. 2.3.3.1 ECOs to Enable the DP83TG720S-Q1 PHY
      4. 2.3.4 USB Connectors (J8, J10)
      5. 2.3.5 OSC_CLK_OUT Connector (J2)
      6. 2.3.6 Voltage Rails Ripple Measurement Connectors (J1, J3, J5) (DNP)
    4. 2.4 Antenna
    5. 2.5 PMIC
    6. 2.6 On-Board Sensors
    7. 2.7 PC Connection
      1. 2.7.1 XDS110 Interface
      2. 2.7.2 FTDI Interface
    8. 2.8 Connecting the AWR2E44PEVM to the DCA1000 EVM
    9. 2.9 Jumpers, Switches, and LEDs
      1. 2.9.1 Switches
      2. 2.9.2 Sense On Power (SOP) Jumpers (J17, J18, J20)
      3. 2.9.3 I2C Connections
      4. 2.9.4 Push Buttons
      5. 2.9.5 LEDs
  8. 3Software
    1. 3.1 Software, Development Tools, and Example Code
  9. 4Hardware Design Files
    1. 4.1 Design Files
  10. 5Additional Information
    1.     Trademarks
  11. 6Revision History

Antenna

The AWR2E44PEVM includes a 3D waveguide antenna produced by SPEED for the four receivers and four transmitters, which enables tracking multiple objects with their distance and angle information. This antenna design enables estimation of both azimuth and elevation angles, which enables object detection in a 3-D plane (see Figure 2-11). Note: RX1 and RX4 are 180 degrees out of phase which should be compensated for in post processing.

AWR2E44PEVM AWR2E44PEVM Antenna DesignFigure 2-11 AWR2E44PEVM Antenna Design

The antenna design shown in Figure 2-11 results in the virtual antenna array shown in Figure 2-12. The distance between two adjacent cells is lambda/2.

AWR2E44PEVM Virtual Antenna ArrayFigure 2-12 Virtual Antenna Array

The antenna peak gain is 15 dBi across the frequency band of 76 to 81GHz. The radiation pattern of the antenna in the horizontal plan (H-plane) and elevation plan (E-plane) is as shown in Figure 2-13 and Figure 2-14, respectively.

The beamwidth of the antenna design can be determined from the radiation patterns provided below. For example, based on 3-dB drop in the gain as compared to bore sight, the horizontal 3dB-beamwidth is approximately ±35 degrees (see Figure 2-13), and elevation 3dB-beamwidth is approximately ±3 degrees (see Figure 2-14). Similarly, the horizontal 6 dB beamwidth is approximately ±42 degrees (see Figure 2-13) and the elevation 6dB-beamwidth is approximately ±5 degrees (see Figure 2-14).

AWR2E44PEVM Azimuth Radiation Pattern (77GHz to 80GHz)Figure 2-13 Azimuth Radiation Pattern (77GHz to 80GHz)
AWR2E44PEVM Elevation Radiation Pattern (77GHz to 80GHz)Figure 2-14 Elevation Radiation Pattern (77GHz to 80GHz)