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

2.6.1 TX and RX Antenna Arrays

The following sections describe the TX and RX antenna array structures included on the board. The element spacing information can be used to form the necessary processing models of the MIMO virtual array and Beam-Forming phased array.

swru553-cascade-rf-design-spec-diagrams-txrx-arrays.gifFigure 12. PCB Antenna Arrays

Reset Status LED Callouts:

  1. RX Array A - 8, lambda/2, linear elements - azimuth displacement only
  2. RX Array B – 4, lambda/2, linear elements - azimuth displacement only
  3. RX Array C – 4, lambda/2, linear elements - azimuth displacement only
  4. TX array – 9, lambda × 2, linear elements in azimuth. 4 minimum redundancy array (MRA) elements in elevation.
swru553-cascade-rf-design-spec-diagrams-rx-array-drawing.gifFigure 13. RX Antenna Array Dimensions

Table 5. RX Antenna Array Dimensions

Dimension Label Dimension (mils) Dimension (78.5 GHz lambda)
A1 76.78 0.5
A2 4069.34 26.5
A3 614.24 4.0
A4 2456.96 16.0
swru553-cascade-rf-design-spec-diagrams-tx-array-drawing.gifFigure 14. TX Antenna Array Dimensions

Table 6. TX Antenna Array Dimensions

Dimension Label Dimension (mils) Dimension (77 GHz lambda)
A1 76.78 0.5
A5 1191.5 7.759
A6 307.12 2.0
B1 2928.84 19.072
B2 76.78 0.5
B3 230.36 1.5
B4 153.56 1.0
swru553-cascade-rf-design-spec-diagrams-tx-rx-array-drawing.gifFigure 15. TX and RX Antenna Array Relative Dimensions