Posted on August 9, 2009
Previously we set forth the idea of loading every open channel with a Part 15 signal, hoping to compensate for weak signal with plenty of signals. The ideal way for the average home occupant to achieve this would be in minimal architectural space, namely from a single antenna cluster acting like a big frequency sprinkler. But it don’t work.
The closer frequencies are to one another, the more are “tuned” antennas inclined to receive and transmit at the same time. Example: when my 1550 KHz and 1680 KHz antennas are mounted on the same pole, they back-feed into each other and are no longer separate, discreet signals. Each one carries a trace of the other. This becomes very obvious when different audio is sent over each transmitter. The only solution we know is to separate the two transmitters as far apart as possible. Of course ultra-precise filters could be designed, but now we’re talking about cutting into the bandwidth of the antennas, and we’re not that smart.
Luckily this can be expressed philosophically:
The solution to one problem is the problem to another solution.