This little project generates a small indoor TV antenna for DVB-T UHF reception. The antenna itself is based on the Moxon design and consists of two L-shaped active parts in front and one U-shaped reflector part at the back. It is directional and the gain is about 5dB. For technical details of this antenna design see e.g.: http://de.wikipedia.org/wiki/Moxon-Antenne The antenna frame consists of two identical parts between which the antenna wires are placed into the corresponding grooves and fastened by screwing the two frame parts firmly together. The antenna stand consists of a rotor plate, a stem and a foot part. The foot has the form of a cross and has screw holes that are arranged as a 75mm and 50mm squares, so that it can not only be used to stand on a flat surface, but it can also be bolted to a standard 75mm or 50mm VESA mount at the rear of the TV set. The dimensions of the Moxon antenna are parametrized in the SCAD file, so that resonance frequency can be fine tuned to get optimal performance for a particular UHF channel. The antenna parameters A,B,C,D (see picture #3) can be calculated e.g. with the Paul Evans' nice on-line Moxon calculator at http://w4.vp9kf.com/moxon_design.htm. This calculator was also used to get the parameters for the 4 preconfigured configurations for channels 24(498MHz), 36(594MHz), 48(690MHz) and 60(786MHz), for which ready-to-print STL files are provided.First, you need to choose the antenna variant for the UHF channel / frequency for which you need optimal reception and print the frame part twice. (If in doubt, just take Ch48/690MHz as I did.) Take any strong wire with 2-3mm diameter and cut then bend the two smaller L-shaped pieces and the one longer U-shaped piece according to the table in picture #3. These should fit perfectly into the grooves of the plastic frame. If possible, take aluminum, copper or brass wire - but if you don't have that, any other wire will do as well. (I used wire from a coat hanger for the black antenna, and a 3mm welding rod for the green one.) Clamp the wire pieces into the corresponding grooved and fasten the lower and upper frame part with six M3x12 screws and corresponding nuts - nylon screws and nuts are ideal, but metal screws should work as well. (Instead of screws one could probably also use firmly tightened cable binders.) Strip the end of the antenna coax cable and solder the central conductor to the end of one and the shield to the end of the other L-wire. Assemble the antenna stand by using two M3x18 screws and two M3 Nyloc nuts as the axes of the upper and lower hinge. Finally, if you want to attach the antenna to the VESA mount of you TV set, you'll need four M4x10 screws. I printed the plastic parts of the antenna from 3mm ABS filament on my DIY Prusa i3, using a 0.4mm nozzle with 0.56mm extrusion width and 0.25 layer height. I print on a clear mirror without Kapton tape, but thoroughly cleaned with acetone first and then with double concentrated lemon juice.