2 layers45.8 × 42.9 mm
Tri slot hub Aug2020partialEdit
djsouthall/hpol-prototype
This contains code, data, and design files created while working towards a finalized HPol antenna for RNO-G.
10 parts1
2 layers91.9 × 14 mm
Tri slot feedlines
djsouthall/hpol-prototype1This contains code, data, and design files created while working towards a finalized HPol antenna for RNO-G.
- Size
- 91.9 × 14 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 14
- Nets
- 4
- Pads
- 18
- Tracks, vias
- 104, 42
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 2 Mar 2020
- Updated
- 9 Jan 2023
Overview
Tri slot feedlines is an open-source printed circuit board by djsouthall, from the djsouthall/hpol-prototype repository on GitHub. It is a 2-layer board of 91.9 × 14 mm with 14 parts on 4 nets, routed with 104 tracks and 42 vias.
It belongs with the radio and wireless boards of this library.
README
README.mdRNO-G HPol Antenna Design
This design was finalized (for the current deployment cycle), and several dozen antennas have been built with this design. Images of the finalized design can be seen below. The antennas consist of 8in OD aluminum tubes with custom machining for slots and structural support holes. The center feed consists of a custom set of connected PCB circuits, supported with several waterjet nylon inserts. Each end of the antennas has waterjet cut nylon caps, with the top having additional structure to hold the front-end electronics. These endcaps have rope strung through which is ultimately used to hang the antenna in the bore-hole.
Images
| Opaque Element | Transparent Element |
|---|---|
 |  |
| Feed |
|---|
 |
Development Notes
This contains code, data, and design files created while working towards a finalized hpol antenna for RNO-G.
I use some functions that are defined from another package: plot_ff.py. These aren't complicated and could easily be redifined in this project, but I am the only one using it and this is fine for me.
To use certain tools and scripts in this repository you may need to define the environment variables BEACON_ANALYSIS_DIR (as specified in the BEACON analysis code framework BEACON), as well as HPOL_ANALYSIS_DIR, which is similar but pointing to the folder containing this repository on your local machine.
Additionally I am moving towards using direct imports of packages, which will require you to add these paths to your python path.
For example in my bashrc I have: HPOL_ANALYSIS_DIR="/home/dsouthall/Projects/Greenland/hpol_prototype/" export HPOL_ANALYSIS_DIR export PYTHONPATH=$PYTHONPATH:/home/dsouthall/Projects/Greenland/
Parts
14| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | C | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3, C4 |
| 2 | TestPoint | TestPoint:TestPoint_Loop_D3.80mm_Drill2.0mm | slot_l1, slot_r1 |
The 6 most common of 14 parts.
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Questions
How big is the Tri slot feedlines PCB?
It measures 91.9 × 14 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Tri slot feedlines use?
14 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Tri slot feedlines KiCad files?
From the djsouthall/hpol-prototype repository on GitHub, at the commit this page was made from: the board is design/Feed Design/tri-slot-feedlines_revC/tri-slot-feedlines.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tri slot feedlines design in my own project?
Its repository states no licence, so its author keeps all rights: ask djsouthall before reusing the design.