I am using a Flightaware antenna 5.5 dB, and a home made antenna of my own design, the V-Stub antenna.
Running both antennas installed indoor in same large window at a horizontal distance of 50cm (a sisde-by-side comparison), both with very short length of coax, the V-Stub performs about 80% of FA antenna.
I could not measure Gain or radiation pattern as I dont have professional equipment to do so, but I ran computer simulation on the design and it showed promising gain and radiation pattern.
(1) Side-by-Side Comparison of Flightaware and DIY V-Stub Antenna
(2) Computer Simulation Results:
2-D radiation Pattern & Gain
3-D Radiation Pattern
(3) Measurement of SWR
(4) Physical Build - Prototype
