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 PCB Antenna Element

Each TX/RX antenna element is implemented as a series-fed, Microstrip patch array. The following figures and tables describe this antenna element. The element is implemted with a GCPW feed to Microstrip transition, and then Microstrip stub matching into the first patch of the seried-fed array.

swru553-cascade-rf-design-spec-diagrams-patch-antenna-drawing.gifFigure 16. Cascade RF Series-Fed, Microstrip Patch Array Antenna Element Dimensions

Table 7. Cascade RF Series-Fed, Microstrip Patch Array Antenna Element Dimensions

Dimension Label Dimension (mils)
A1 27.568
A2 11.802
B1 47.24
B2 49.21
B3 45.27
B4 49.21
C1 42.52
C2 40.95
D1 16.722
D2 20.002
E1 39.38
E2 55.12
F1 8.4
F2 10.62
F3 3.94
G (1) > 78.7402
H <= 20.67
  1. Dimension G is the is the minimum keepout from any structure adjacent to the antenna (vias, traces, copper pours, and so forth).