SWRU553A September   2019  – February 2020 AWR1243 , AWR2243

 

  1.   AWRx Cascaded Radar RF Evaluation Module (MMWCAS-RF-EVM)
    1.     Trademarks
    2. 1 Getting Started
      1. 1.1 Introduction
      2. 1.2 EVM Revisions
      3. 1.3 Key Features
      4. 1.4 What is Included
        1. 1.4.1 Kit Hardware Contents
        2. 1.4.2 mmWave Studio and Matlab Post Processing
    3. 2 Hardware Description
      1. 2.1 Block Diagram
      2. 2.2 Attaching the MMWAVCAS-RF-EVM to the MMWAVCAS-DSP-EVM
      3. 2.3 Power Status LED Indicators
      4. 2.4 Reset LED Indicators
      5. 2.5 Connectors
        1. 2.5.1 Host Board Connectors(J4, J5)
        2. 2.5.2 Bench Power Connector(J6)
        3. 2.5.3 20 GHz LO Debug Connector (J3)
        4. 2.5.4 AWR OSC_CLKOUT Debug Header (J2)
        5. 2.5.5 AWR Debug Headers (J1_1, J1_2, J1_3, J1_4)
      6. 2.6 Antennas
        1. 2.6.1 TX and RX Antenna Arrays
        2. 2.6.2 PCB Antenna Element
          1. 2.6.2.1 RX Antenna Element Performance
          2. 2.6.2.2 TX Antenna Element Performance
        3. 2.6.3 Virtual Antenna Array
    4. 3 Design Files and Software Tools
      1. 3.1 Hardware Collateral
      2. 3.2 Software, Development Tools, and Example Codes for MMWCAS-RF-EVM
      3. 3.3 Critical AWRx Setup Notes
        1. 3.3.1 LDO Bypass Requirement
    5. 4 PCB Dimensions and Mounting Information
    6. 5 PCB Storage and Handling Recommendations
    7. 6 References
    8. 7 Regulatory Information
  2.   Revision History

2.6.2.2 TX Antenna Element Performance

Simulated TX antenna performance from center of the TX Array is shown below. Six different TX antenna were excerpted to show the overall performance across the array. These excerpted antenna are labeled TX1 and TX2. Like the RX antenna simulations, the TX selected here are meant to highlight the differences in performance between the more widely separated antenna and the more closely placed antenna.

swru553-cascade-rf-design-spec-diagrams-tx-array-sim.pngFigure 23. TX array Excerpt for Simulation (TX1 at the "right" of the image and TX2 adjacent to TX1 to the left. TX1 highlighted in purple.)
swru553-cascade-rf-design-spec-diagrams-tx-array-sim-tx2-pattern.pngFigure 24. Combined TX Array TX1, TX2, 76 GHz, 78.5 GHz and 81 GHz Operation (Maximum E-plane (Phi = 90) and H-plane (Phi = 0) slices shown. 3dB beamwidths shown.)
swru553-cascade-rf-design-spec-diagrams-tx-array-sim-tx2-76G-pattern3D.pngFigure 25. TX Array, TX2, 78.5 GHz Operation (3D Antenna Pattern)