Important

It has been found out that there is lot of delay from the time it is posted in the blog to the time when the content is delivered to my sms channel EMfactoid. Hence it has been decided to update the channel directly instead of working through this blog. Kindly click here to redirect to channel for electromagnetics trivia.

An antenna pattern can be controlled by the amplitude and phase of the current excitations.

With broadband antennas, one can track a large number of frequencies thus enabling us to track several devices with a single design.

A tiny GPS chip embedded onto a cell phone can help you to trace it. This is how mobile tracker works.

All cab services in most of the cities like radio cab, city cab,etc.. use a GPS receiver on top of each vehicle that gives its location to the master controller who manages cab assignment.

Cable TV wire is called co-axial cable. It has one inner conductor(wire) and one outer conductor(meshed sleeve) separated by a dielectric. Fields propogate through dielectric.

An antenna converts electromagnetic fields into electron oscillations(currents) or vice versa.