Circular Polarised Patch antenn , RHCP and LHCP
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Model and some print files for receiving satellite signal in L-Band. Other frequencies can be generated.
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Updated at source:
Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial
General
Model and some print files for receiving satellite signal in L-Band at 1700 MHz and one Inmarsat at 1540 MHz. Other frequencies can be generated.
Model is parametric and other frequencies can be generated directly in FreeCAD: input variables are Er + f0 + substrateHeight. A hole is placed at 50 ohm point off center, Zin for edge feed is calculated. BW is estimated and can be controlled by substrate height.
Printing and building
- Follow instruction here https://sa0pej.wordpress.com/3d-print-and-build-patch-antenna/
Version History
- 2024-09-15 First release
- 2024-09-16 Corrected BW calculation in FreeCAD Spreadsheet => MHz
- 2024-09-29 Corrected coax probe feed for better match (1-2mm off at 1700MHz),
Remade all elements with 5% gyroid infill in 3mf.
Limitation
To find optimum polarisation trim the corners and comparing H and V polarised gain.
My antenna became elliptical with 3 dB different gain in horizontal and vertical direction. Test here.