FIG. 2 shows an illustrative system 200 that may be used to implement RF localization techniques, in accordance with some embodiments of the technology described herein. The illustrative system 200 comprises a plurality of interrogators, which are part of a product 202. The interrogators may be used to obtain estimates of distance to one or more of the target devices 225. In turn, these distance estimates (e.g., together with the known locations of the interrogators on PCB 204 relative to one another) may be used to estimate the location(s) of the target device(s) 225.
As shown in FIG. 2, product 202 comprises a printed circuit board 204. Master interrogator module 206 having interrogator 214 is disposed on PCB 204 along with interrogators 216, 218, and 220, which may be called “slave” interrogators. Master interrogator module 206 further comprises timing circuitry 208, control circuitry 210, and communications circuitry 212.
