An adaptive impedance matching system and considerations for a better performance

A discussion on the performance of impedance matched antenna system and considerations for a better performance

“…The microstrip antennas radiation resistance is primarily established by its dimensions relative to the resonant wavelength. Antennas of differing matching system, having the same dimensions and made to be self-resonant at the same frequency, generally exhibit increased return loss level and lower quality factor with increasing radiation power [2].…”

“…Recently, there has been an interest in increasing the performance properties of microstrip antennas using different matching methods [1][2][3]. It has recently been shown that the return loss performance properties of microstrip antennas are primarily established by -matching circuits.…”

IMPEDANCE MATCHING CONTROLLER FOR AN INDUCTIVELY COUPLED PLASMA CHAMBER - L-type Matching Network Automatic Controller

“…The automatic impedance matching problem has been solved using neural networks (Vai and Prasad, 1993), genetic algorithms (Thompson and Fidler, 2000) (Sun and J.K., 1997) (Sun and J.K., 1999), deterministic tuning algorithms with look-up tables (Moritz and Sun, 2001) and using adaptive systems (Parro and Pait, 2003) (Ida et al, 2004c) (Ida et al, 2004a) (De Mingo et al, 2004 (Ida et al, 2004b); nonlinear control systems have been also considered (Cottee, 2003). In all of the above mentioned cases, the load impedance is not affected by the matching conditions while, in the case studied (inductively coupled plasma discharges), the load impedance is varying during the matching process.…”