wiki:Hardware/antennas

Version 23 (modified by jkol, 2 years ago) ( diff )

—

Site Navigation

  1. COSMOS Testbed Overview
    1. Concepts
    1. Testbed Workflow
    1. Availability and Resource Status
    1. Events and Conferences
  6. Getting Started
    1. Make an Account
    2. Create and Configure SSH Keys
    3. Make a Reservation
    4. Log in to your Reservation
    5. Control Resources with OMF
    6. Run a Hello World Experiment
    7. Get Help and Support
  7. User Guide
    1. Policies
    1. Account Creation
    1. Scheduling and Reservations
    1. Disk Images
    1. Frequently Asked Questions
    1. Resource Control with OMF
    1. Remote Access
    1. Chrome Remote Desktop Setup Page
    1. Measurement & Result Collection
    1. Storage
    1. Support
    1. Contributing to the Wiki
  20. Tutorials
    1. SDR and Wireless
    2. Optical Networking
    3. Wired Networking
    4. Edge Computing
    5. 4G/5G Systems
    6. Orchestration Platforms
  21. Architecture
    1. Data Flow
    1. Deployment Map
    1. Domains
    1. Naming Convention
    1. Networks
    1. Optical
  28. Resources, Services and APIs
    1. RF Control
    2. SDR Control
    3. Compute Control
    4. Network Control
    5. Optical Control
  29. Datasets
  30. Hardware Info
    1. Cameras
    1. Compute
    1. Network
    1. Nodes
    1. Optical
    1. RF Subsystems
    1. Antennas
    1. Full-Duplex Radio
    1. RF Front End
    1. Software Defined Radios (SDR)
  41. RF Policies & Compliance
    1. Outdoor Radio Frequency Allocation
    2. Program Experiment License
    3. Spectrum Monitoring
    4. Emergency Stop Procedures
    5. Network and Platform Security

Antennas

There are two styles of antennas in use in COSMOS. The first style is directional and used exclusively as part of the large node sectors. The second style is omni-directional and used as part of the medium nodes.

Large node sector antenna (directional) Medium node antenna (omni-directional)


Directional (large node sector)

The directional antennas are comprised of a horizontal array of four ultra-wideband antenna elements​. Each element is oriented in the vertical plane and spaced 3 inches (7.63mm) from its neighbor. The frequency range covered by the antennas is 900 MHz - 12 GHz. However, due to limitations in the power amplifiers, USRPs, and other RF front end components, the actual frequency ranges are 2.4 - 6 GHz for transmit (non-contiguous, see RF front end for details) and 900 MHz - 6 GHz for receive.

A GPS antenna is located near the transmit/receive antenna and provides the GPS signal to the USRPs in the node.

Directional antenna interior with element numbering s1-lg1 and s2-lg1's directional antennas from Mudd rooftop


Omni-directional (medium node) without mmWave devices

The omni-directional antennas are comprised of four vertically oriented multi-band antennas​ in a 6” (15.24 cm) 2x2 square pattern with a 14.25”x14.25” (36.2x36.2 cm) ground plane. The frequency range covered by the antennas is 1.7 - 6 GHz. However, due to limitations in the power amplifiers, USRPs, and other RF front end components, the actual frequency ranges are 2.4 - 6 GHz for transmit (non-contiguous, see RF front end for details) and 1.7 - 6GHz for receive.

A GPS antenna is located in the middle and provides the GPS signal to the USRPs in the node.

Unpainted omni-directional antenna Antenna element numbering md1's omni-directional antenna from street level


Omni-directional (medium node) with dual mmWave devices

The mmWave version of the medium node antenna housing has the same configuration for the sub-6GHz and GPS antennas as the medium node configuration above. The main difference is in the addition of:

mmWave & omni-directional sub-6GHz antenna Deployed antenna at CCNY

The mmWave arrays are installed at 45 degrees and down-tilted 12 degrees to give optimal street level coverage. The "window" for each mmWave array is a 5" x 5" opening covered with a 1/8" scratch/impact resistant polycarbonate to protect the array elements.

Design files for the mmWave medium antenna:

Cabling for the medium node antenna consists of:

Function QtyType
Sub 6GHz antenna 4 N-male to right-angle N-male RG223 coax cable
GPS antenna 1 N-male to TNC-male right-angle RG223 coax cable
PAAM IF 8 N-male to N-male right-angle RG223 coax cable
PAAM USB debug 2 SMA-male to SMA-male RG58 coax cable
PAAM ethernet 2 Cat 6 UTP ethernet cable w/ right-angle down connector on PAAM side
PAAM power 1 Cat 6 UTP ethernet cable
Cooling fan power & temperature monitoring 1 Cat 6 UTP ethernet cable
Camera Ethernet 2 Cat 6 shielded ethernet cable

Attachments (16)

Note: See TracWiki for help on using the wiki.