I'm proud as the pioneer of introducing this DIY parabolic antenna booster to Phantom 3 or Inspire 1. The beauty of this DIY booster (9 dBi) is no antenna nor RC mods required without worrying to void warranty. You can install or remove the booster within seconds on Phantom 3 remote controller, while most of P3 cases/backpacks are designed for stock RC/antennas.. It is cheap (cost almost nothing) and easier than any antenna mod without the hassles and risks of adding/replacing 2.4G antenna, pigtail cable and drilling holes on RC. It's widely used in RC hobby and Wi-Fi router for years. Video shows how it works improving both RC and HD video signal We pick 9 dBi is mainly due to the size fitting well on Phantom 3 remote controller and with reasonable beamwidth for easy aiming the Phantom. We prefer slight "V" (<20 degrees vs. vertical) antenna setup to keep them apart for lowering interference and improving diversity gain. A modified PDF template for Phantom 3 antenna available for download https://drive.google.com/file/d/0B6EvPgvmsFJlcVZ3QU5BZlFkVkk/view?usp=sharing RC signal dropping to "53" and HD video signal to "11" at 2.5km range RC signal improving to "93" and HD video signal to "56" after antenna booster installed • Material required: cardboard, aluminum foil (or aluminum/copper tape) • Tools required: printer, scissors, utility knife, glue, double tape (I use double tape to stick aluminium foil onto cardboard) • DIY steps: 1. Print 2 copies of the PDF template on A4/Letter size paper (or direct on cardboard if your printer support) from the above download link 2. Use common sense and follow the steps below 3. https://rchelimenace.wordpress.com/how-to-build-your-own-windsurfer-antenna/ 4. Some of you might be wondering why the booster is parabolic with precise focal point at the antenna (shown below) or can it be some other shapes? Why some pilots report working very well but some don't? This simple DIY booster involves certain physics and RF knowledge https://en.wikipedia.org/wiki/Parabolic_antenna. At 2.4GHz frequency, precision is important while 1/4" discrepancy is unacceptable. With proper parabolic curve and focal point, RF reaches to (sends from) antenna at the same time in same phase to maximize the booster effect. Otherwise, some RF might be shifted/cancelled between each others to lower the performance. After the introduction of this parabolic antenna booster to Phantom 3 or Inspire 1, there are so many members interested in this simple mod to extend FPV video and control range. There are various eBay sellers listing their 3D printed antenna boosters with similar design, and I have listed them below for easy reference. http://www.ebay.com/itm/DJI-Phantom...-Video-Range-Booster-Windsurfer-/261966558715 http://www.ebay.com/itm/311405462696?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT http://www.ebay.com.au/itm/281759452169?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 If any of you found similar antenna boosters and are willing to share, please let me know and I can list them in the OP.