Dear Engineers,
I have recently been pattern testing six separate dipole arrays in a remote part of Queensland. All these arrays are of the same design. The arrays are for use over 7 to 17GHz.
My problem is that strangely, different arrays have given different patterns. That is, some have...
Ddear Engineers,
I am trying to design a planar circular spiral antenna with a certain (pretty wide) beamwidth.This will mean I have to sacrifice gain –however, I don’t know from what direction the radio waves will come from so I need the wide beamwidth.
The maths for a spiral seems easy. –One...
Dear Engineers,
Whilst pattern testing various antennas in a very remote part of Ireland, it has been noticed that the pattern often has a “glitch” on boresight (i.e. the glitch position corresponds to when the antennas are "peaking" to each other -pointing into each others boresight). The...
Hello Sir,
I would be very grateful if engineers could offer any explanations as to why I have found that the received_power versus frequency graph of “standard gain horns” is very jagged indeed. –It is not anything like a straight line (not even a curved line). –Rather, this graph is...
I am worried that I may be suffering from significant ground-reflections in my Antenna Patterns. -I am Pattern testing horn antennas at around 1GHz. The source horn has a fairly broad beamwidth. (so too do the Horn_Under_Test). I am Pattern Testing in my back garden in Rural Cumberland (very...
