I need some help from anyone who knows about fields and/or rf propagation. Here's my issue: I have a system with a transmitter sending a continuous 2 MHz signal out using a loop antenna. The loop is electrically small, maybe 5" in diameter and around 7 turns. The receiving antennae (there's 2 of them) are likewise the same size and number of loops, and is around a couple of feet away from the transmitter. The RX antennae are just a couple of inches away from each other. They all share a common centerline. Also, the antenna positions are fixed on a common, non-magnetic, core. Here's the problem: there is absolutely no phase change in either RX antenna. That is, they are at 0 degrees phase, relative to one another. Changing polarity on either RX antenna does not affect the relative phase, where the expected phase shift would then be 180 degrees. In an experiment, using duplicate RX antenna sections, we discovered that the very near field behavior is quite different than the far. And, this 'near' behavior only is true withing an inch or 2 of the transmitters. There, the RX phase can changed by swapping the polarity of the antenna leads. Fine. Moving these 'floating' sections in the vicinity of the TX reveals phase inversions depending upon the position. But, again, moving away from this near field area, the phasing is always zero degrees regardless of the antenna polarity. Anyone know what may be going on? ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu