A NEC Model Comparative Analysis of Physical Orientation and Performance
by Dr. Carol F. Milazzo, KP4MD (posted 12 June 2015)
The small magnetic loop is a useful compromise antenna for limited space and portability. For this reason, the magnetic loop antenna is a practical high frequency antenna solution for the restricted space of apartment dwellers. Little has been written on the effect of antenna orientation on performance in this scenario. This study presents a comparative 4nec21 model analysis on the effect of orientation of magnetic loop antennas mounted on an apartment building window or balcony with regard to antenna radiation pattern and efficiency.
You can see the entire article at the following link.