When setting up a wireless link using a transmitter and receiver with two helicals facing each other, should both antennas be RHCP or should I be using a LHCP/RHCP pair?
I'm sure this is a simple question to someone who knows about these things, but I'm afraid what I know about RF engineering could be written on the back of a napkin. From what I've gleaned from model aeroplane forums it sounds like both antennas should be identical, and choosing the wrong combination can result in a 30dB loss in received signal, but I wanted to get the opinion of some people in the industry, as one company I work for uses a RHCP/LHCP pair for wireless audio links (to my mind this intuitively 'seems wrong' as the 'threads' won't 'wind on' to each-other, if you catch my drift).
This begs the questions, what is the practical difference between RHCP/LHCP, and why might a company have equal numbers of both types in their hire-stock?