The document discusses small loop antennas, also known as magnetic dipole antennas. It provides details on: 1) The vector magnetic potential, current density, and electric and magnetic fields generated by a small loop antenna. The fields are similar to those of a Hertzian dipole. 2) Key parameters of small loop antennas including power density, directivity, total radiated power, and radiation resistance. Increasing the diameter or using a ferrite core can increase the antenna's efficiency. 3) Practical examples of small loop antennas including a precision VLF antenna coil and an AM/LW loopstick antenna for tuning between 100 kHz to 1710 kHz when used with a variable capacitor.