3D-printed directional Wi-Fi antenna project with possibilities of various upgrades
This project showcases a modular, 3D-printed parabolic dish antenna optimized for 2.4GHz (Wi-Fi band) frequencies. Designed for experimentation and adaptability, it allows easy replacement of the dish, feed, and structural parts to support different frequencies and setups — including potential use cases in 5GHz or 5G ranges.
The antenna combines RF engineering principles with practical, low-cost materials and is intended for students, hobbyists, and network engineers interested in wireless signal enhancement.
-ProjectGoal
To create a functional, low-cost 2.4GHz directional antenna that is:
- Modular – parts can be swapped, resized, or upgraded
- 3D printable – accessible and replicable with desktop 3D printers
- Practical – shows real signal gain in Wi-Fi environments
| Component | Details |
|---|---|
| 3D Printer | Creality Ender 3 V3 SE |
| Filament | PLA |
| Dish Diameter | 30 cm |
| Feed Element (Dipole) | ~31.5 mm copper wire (~1 mm diameter) with heat-shrink insulation |
| Can (Waveguide) | Tin can (82 mm diameter, ~116 mm depth), RP-SMA male connector attached |
| Feed Placement | ~49 mm from can bottom (optimized for wave reflection and resonance) |
| Reflective Surface | Aluminum tape with electrically conductive adhesive |
| Dish Shaft | Stainless steel rod (recommended over PLA for strength) |
| Tripod Mount | 3D-printed nut adapter for phone/laser tripod compatibility |
| Adjustable Tilt | Wheel-based angle adjustment on the stand |
- Modular construction: All parts are designed for easy assembly and replacement:
- Swap out dishes of different sizes by unscrewing the holder.
- Replace or upgrade the feed can for higher frequencies (e.g., 5GHz).
- Cantenna holder accepts different can diameters.
- RF-Aware Feed Positioning: Feed is carefully placed ~49 mm from the can bottom, accounting for reflected wave propagation, not just 1/4 λ. This corrects a common mistake in similar builds.
- Insulated Feed Element: Copper feed is protected with heat-shrink tubing (<0.1 mm thick) to prevent corrosion while minimizing any capacitive interference.
- Effective Reflector Surface: Dish covered with aluminum tape featuring conductive adhesive, ensuring minimal signal loss across the parabolic surface.
- Robust Stand Design: Dish and shaft mount on a metal support rod, providing the strength to hold larger or heavier components.
- The feed is tuned not by a simple 1/4 wavelength formula, but based on real reflective path inside the can.
- The copper feed element is covered with heat-shrink tubing (less than 0.1mm thick) to prevent corrosion, without significantly impacting electrical properties.
- The dish surface is made conductive to reduce energy loss as signals reflect across it.
Preliminary signal strength tests show enhanced directional reception in the 2.4GHz Wi-Fi band, with measurable gain compared to typical router antennas. Results may vary depending on local interference and test environment.
- RF theory: feed tuning, reflection, wavelength alignment
- Mechanical design: adjustable mounts, modular holders
- 3D modeling & printing: PLA, design for strength
- Signal performance testing (RSSI)
- Materials choice for conductivity and mechanical strength
- Documentation and open-source sharing
This project is open source under the MIT License — feel free to modify, share, or build on it, with credit.
Feel free to open an issue or fork the repo if you'd like to contribute or ask questions.
Complete antenna mounted on the tripod: https://github.com/SudoTraceRoute/2.4GHz-Modular-Parabolic-Dish-Antenna/blob/main/Photos_of_antenna/IMG_20250824_152351%20(1).jpg
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3D printed parts for the antenna: https://github.com/SudoTraceRoute/2.4GHz-Modular-Parabolic-Dish-Antenna/blob/main/Photos_of_antenna/IMG_20250716_165126%20(1).jpg
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As a part of my hobby I'm building and testing real hardware to deepen my knowledge in RF behavior, Wi-Fi diagnostics, Linux tooling, and network infrastructure.
I have interest in networking, programming and other fun stuff.
This hardware build is finished and has successfully demonstrated directional Wi-Fi reception improvements compared to standard omnidirectional antennas.
Further experimentation, signal testing, and network analysis will be explored in future, related projects using this antenna.