06-09-2017, 10:44 AM
RE: Post#3:
It depends on what frequency you want to receive, for MW etc (ground wave propagation) From the transmitter, losses in the E field with horizontal polarization are high due to the earths conduction so vertical polarization is used, the transmitting antenna is typically a classic Tee antenna, the vertical section being the radiating element, this means that the receiving antenna will usually work best if there's a vertical component in it, the classic antenna would be the inverted L.
If receiving DX then it will be via skywave so either polarization can be used for reception because the EM waves polarization will have undergone some twisting in the upper atmosphere and the received field will have taken on an elliptically polarized form.
Lawrence.
It depends on what frequency you want to receive, for MW etc (ground wave propagation) From the transmitter, losses in the E field with horizontal polarization are high due to the earths conduction so vertical polarization is used, the transmitting antenna is typically a classic Tee antenna, the vertical section being the radiating element, this means that the receiving antenna will usually work best if there's a vertical component in it, the classic antenna would be the inverted L.
If receiving DX then it will be via skywave so either polarization can be used for reception because the EM waves polarization will have undergone some twisting in the upper atmosphere and the received field will have taken on an elliptically polarized form.
Lawrence.
