After experimenting with RPOL, I came up with this design which I quickly built and deployed. Here are some of the main features and advantages:
- Absolute polarization flexibility, GREAT SOLUTION TO FARADAY POLARITY ROTATION!
- Extremely simple system and very economic. No complex phasing schemes, hardware nor special engineering required, all parts are available at most local and ham stores.
- The "Rear Mounted" configuration favors clean radiation patterns as there are no metallic structures in the way of the antenna, everything is behind the reflector element.
- If best RX does not equal best TX polarization because of Faraday + Spatial offset interactions, it is possible to set a separate RX/TX polarization. In other words, "non-reciprocity" effect can be completely eliminated! See Section 7, 22, 23 and 24 for live examples!
- Allows tuning polarization for best RX/TX within seconds: 90 degrees in 15 seconds.
- As noise itself can vary a lot with polarization (sometimes in the order of 2-4 dB range), the best signal-to-noise polarization can be selected. See Section 12-14-16-21 for live examples!
- Since the antennas are "rear mounted" and the driving elements are very close to the power divider, a very short length coax is needed resulting into lower losses.
- Can set any polarization angle using convenient remote control. Includes a digital display for each antenna polarization which can be set independantly.
- Each antenna is powered by an economic Channel Master TV rotator model "CM-9521A" (~100$/unit) and held by a support bearing model TB105 (~40$/unit), which is designed to work with this rotator: