Quoting from the wiki article: > As a countermeasure against an NLJD, professional covert listening devices (bugs) of the Central Intelligence Agency were equi

Quoting from the wiki article: > As a countermeasure against an NLJD, professional covert listening devices (bugs) of the Central Intelligence Agency were equipped from 1968 onwards with a so-called isolator. An isolator is a 3-port circulator of which the return ports is terminated with a resistor. Any energy injected into the bug by an NLJD, will be absorbed by the resistor, resulting in no (or very little) reflected energy. An example of such a bug is the CIA's SRT-107. Do modern concealed spy cameras have this kind of tech? Is there anyway to counter such a counter-measure?