Mostlysmall 2m yagi ISS / FUNcube Antenna

thingiverse

UPDATE 2: When you cut a piece of copper tape measuring 26.5cm, simply remove the paper backing only from the very ends to create two sticky pads, then bridge the dipole feed where the wires are soldered and your antenna will function better. This technique is known as a hairpin match. Take a look at the return loss plot that shows the results with and without it - lower return loss is always better because it means less signal is bounced back at you. If you remove the paper backing, however, the antenna won't work correctly anymore at its original length. UPDATE: To get your antenna in tune for 145.5Mhz, simply trim off 3.5cm from each end of the driven element and 2cm from both ends of the reflector - don't even think about touching the director! This will bring your antenna into perfect tune at 145.5Mhz. Don't bother with this if you only plan on using it for 137Mhz weather satellites, as the trim won't be necessary. A designed a simple yet effective short 2m 3 element yagi antenna that can be easily laser cut from 1/8" plywood or MDF and used by kids of all ages. Each element is carefully labeled and only requires some glue and copper tape to complete its conductive parts. This isn't the best antenna ever, but it's great because of its lightweight design, small size, and fast assembly time. This antenna is designed specifically for use with an RTLSDR that has had its stock antenna chopped off and the coax directly soldered to the drive element - don't forget to leave a small gap in the center. For more details on how it's put together, take a look at the photos of the finished product.