Magnetic loop antenna is a popular subject in the Amateur Radio community. The book Magnetic Loop Antenna: Slightly Different Each Time, starts out by providing a theoretical description of magnetic loop antenna (MLA), including a calculation example. Next it describes several types of unique magnetic loop antennas, while the final part is devoted to the independent evaluation of magnetic loop antennas by Amateur Radio operators, who had the opportunity to use magnetic loop antennas in BTV production.
A Bit of Theory to Start
Magnetic Loop Antennas in Practice
Reports and Experience with Magnetic Loop Antennas