Systems and methods described herein can use near field communications to locate a radiating transmitter, such as a pill transmitter swallowed by a patient. In some embodiments, the pill transmitter can include multiple transmitting elements configured to transmit signals in an axis orthogonal with respect to each other. Further, in some embodiment, the pill transmitter can also include multiple transmitting elements in each of the three axes where the three axes may be perpendicular with respect to each other. The magnetic field emitted from the pill transmitter can be measured by the receiving antennas, for example, using principles of mutual inductance.
