ARO LPDA

• 8 log-periodic antennas
  • Separation 1-m, no pattern specified (1x8, 2x4, 3x3).
  • Semipermanent for a 6-months deployment.
• Ground plane.
• 8 RF-chains.
• Recording machine.
• Network gateway computer.

Taskt to coordinate with Ben & Caroline.

• Define installation place.
  • Share pointing with CHIME.
  • Close to the basement.

Tasks for Toronto

• Identify and order the antennas.
  • Order placed, waiting for them to arrive.
• Identify and order the analog chain component or maybe the cables.
  • In progress.
• Identify and order the computers.
• Recording computer with big memory (I have the old moose in my office, can we borrow some of the parts of it, need to spec it out).
• Network gateway computer (boris, we have the plan to buy it).
• Testing the antenna and analog chain.
• Install the computer os and software and test it out (Not sure how to test it without an iceboard (maybe lwlab has one)).
• Depending on the antenna mounting plan, we may need to build the mounting base.

Tasks for ARO

• Shipping equipment to ARO?
• Install the antennas mounting to a solid base (Need to think about the snow environment) ** We will have to get a precise measurement of antenna locations and layout.
• Connect the cables between the analog chain and FPGA
• Integration test.
• Record crab pulses.
• Calibration of beamforming?

RF chain

Antenna and first stage

flowchart LR

  style RF fill:#ffffff,stroke:#000000,stroke-width:4px
  classDef rf fill:#ffffff,stroke:#000000,stroke-width:2px

  classDef power fill:#ffffff,stroke:#000000,stroke-width:2px,stroke-dasharray: 5 5

  A0 --> A1
  A1 --> A2

  subgraph RF [Box 1]

  M1([DC-reg])
    A2 --?--> A3
    A3 --?--> A4
    A4 --?--> M0
    M0 --?--> A5
    A5 --?--> A6
    M0 -.DC-unreg.-> M1
    M1 -.DC-5V.-> A3
  end

  A6 --> A7


  A0[\Antenna/]
  A1([Coax. cable 1])
  A2([Bulk-head 1])
  A3([LNA 1])
  A4([LPF])
  A5([HPF])
  M0([Bias-T])
  A6([Bulk-head 2])
  A7([Coax. cable 2])

Loading

• Antenna: Y42400WB
• Coax. cable 1: ?
• Bulk-head: ?
• LNA1: ZX60-P33ULN+
• LPF: ?
• Bias-T to inject power: ? buy? design (and use it as high-pass filter? 😎
• HPF: ?
• Bulk-head: ?
• Coax. cable 2: ?
• Container box: ? Bud-Industries, somethin like this? Amazon
• Place it on the base of the antenna, or use the same box for 1st and 2nd stages?

Second stage

flowchart LR

  style RF fill:#ffffff,stroke:#000000,stroke-width:4px
  classDef rf fill:#ffffff,stroke:#000000,stroke-width:2px

  classDef power fill:#ffffff,stroke:#000000,stroke-width:2px,stroke-dasharray: 5 5

  A0 --> A1

  subgraph RF [Box 1]
    M1([DC-reg])
    A1 --?--> A2
    A2 --?--> A3
    A3 --?--> M0
    M0 --?--> A4
    M0 -.DC-unreg.-> M1
    M1 -.DC-5V.-> A3

  end

  A4 --> A5


  A0([Coax. cable 2])
  A1([Bulk-head 1])
  A2([Bias-T-1])
  A3([LNA 2])
  M0([Bias-T-2])
  A4([Bulk-head 2])
  A5([Coax. cable 3])

Loading

• Bulk-head-1: ?
• Bias-T 1: buy? design (and use it as high-pass filter? 😎
• LNA-2: Noeelec Lana Barebones.
• Bias-T 2: buy? design (and use it as high-pass filter? 😎
• Bulk-head-2: ?
• Coax. cable 3:
  • RG-58?
  • Conduit to protect it?
  • Anchors?

Coax to basement

Basement rack unit

• 400-800 MHz filter: ZABP-598-S+.
• Bias-T: ? buy? design (and use it as high-pass filter? 😎
• Power supply.
• Voltaje regulators.
• Gain equalizer.
• LNA-3: Noeelec Lana Barebones.

Suppliers

• Antenna - ???
• (8) LNA 1 - Mini-Circuits.com
• (8) Band Pass Filter - ZABP-598-S+ - 410-785 MHz) - Mini-Circuits.com
• (8) Low-pass filters - VLF-800+ - Mini-Circuits.com
• (16) LNA 2&3 - Amazon.ca - Noeelec Lana Barebones
• 32 SMA bulkheads - Amazon.ca

Resources

• Antenna - Y42400WB Datasheet
  • 37-cm height
• LNA 1 - ZX60-P33ULN+ Datasheet
• LNA 2&3 - Noeelec Lana Barebones Datasheet
• Band Pass Filter - ZABP-598-S+ - 410-758 MHz Datasheet
• Low-pass filter - VLF-800+ Datasheet