Cable-less broadband impedance measurement technique for miniature antenna using optical/RF transceivers

Antenna impedance measurements are usually performed with a coaxial cable connected to the RF input port. For miniature or very integrated antennae, the presence of a coaxial cable can alter drastically the impedance and radiation behaviors. In this paper a new broadband measurement method based on RF/optical transceivers device which avoid the coaxial cable disturbance is presented. A validation based on an arbitrary load and a canonical antenna measurement is proposed. An implemented use case is presented for a TETRA Pager.