Originally Posted by Roy
2. fitted next to an antenna - it will greatly reduce radio reception and transmition in that direction.
Originally Posted by Scary Des
There is no evidence for this:- a)they work on different frequencies b)the reflector is only 400mm high where the aerial is a 1000mm and c)because an aerial radiates around 360 degrees the reflector could at the most shield only 20 or 30 degrees, if it has any effect at all. Des
Des any lump of metal with in the propagation field of an antenna will affect its standing wave ratio which is a measurement of how efficiently your antenna system will radiate the power available from your radio.
Assuming the Radar reflector is made of a lot of meat sheets etc. unless you tune your antenna in place adjacent to the metal object, there will be some impact on the efficiency of the array and therefore impact the gain for reception and its transmission characteristics.
Taking it too the extremes, it could also be extrapolated that due to the miss match caused by the adjacent object in the near field, some of the RF energy would be reflected back down the coax to the final PA stage in the transmitter, which over a very long period of time may result in PA failure.
Having said that I expect this would have to take a very long time, and the reduction in gain will have little impact but one that certainly could be measured and quantified, if you were keen .