Total posts : 45366
The useful radiation “launched” from a monopole system originates from the current flowing along its vertical conductors located above the surface of the earth, and the reflection of that radiation from the surface of the ground plane at distances beyond 1/2-wavelength from the vertical conductors.
The buried radials are part of the series path for the r-f currents induced in the earth by radiation from the vertical conductors within the radius of 1/2-wavelength from the vertical, and the “ground” terminal of the transmit system. If no such path exists, then a monopole will radiate almost nothing.
If the buried conductors are offset from the base of the monopole then they will not be as effective as a source for those earth currents. But whatever they do gather will flow along the vertical monopole, and produce omnidirectional coverage.
So while it might seem like it shouldn’t happen, there is no physical reason why a monopole would radiate a noticeably skewed pattern in such circumstances.
Carl will probably point out his buried wire that “helped his signal go uphill,” but that would be a localized effect. Most likely the average signal strength a few blocks away was/is fairly similar in all directions, except for other localized effects.