Being a HAM Radio Licensee for over 45 years now, Advanced Class US License, I am accustomed to dealing with frequencies from 3.5 mhz to 432 mhz.
However, after entering the world of RC flying machines back in early 2013 I found myself staring at microwave frequencies from 2.4 GHz to is high as 5.8 GHz.
Normally, this would not be an issue but when you factor in First Person View (FPV) operations you're now looking at antenna configurations and their feed lines.
I had been thinking about this for some time but Bruce's post this morning really got me to look into it. As most of you know the higher you go in frequency the more inefficient power transmission becomes.
What does this mean? Well, every inch of additional coax you add from your RF source to the actual antenna can dramatically affect the overall performance of your ground station (GS). Lets look at a typical FPV configuration;
A 2.4 gHz radio system (TX) for controlling the flight of your aircraft, the brand is not important to this discussion, however your location may be. Video from your aircraft is being transmitted by a Video Transmitter (VTX). On the ground the two most common monitoring solutions are personal video goggles, or a monitor of some kind.
Both of these video display methods require a video receiver (VRX) that captures the signal...Continue Reading
I retired Oct 31st 2012 @ 66. I have done many things during my working career, being a Vioce President of a large Credit Union, a licensed RE Appraiser with my own business, owning a PC computer consulting business in early 1980s'.
United States, CA, Huntington Beach
I have always been intrigued RC models but never jumped into flight. For a short time in the late 1970's I did have an Elec. RC car, fun. Now I have discovered QUADS my first a Blade MQX, what fun. Photography is another interest see my web page.