Design and Applications of a 300–800 MHz Tunable Matching Network

A real-time electrically controlled active matching circuit utilizing genetic algorithms for biomedical WPT applications

“…From the literature, it is possible to achieve the maximum Smith chart coverage up to 70 % under the conditions for R L and G T which guarantee the improvement of matching, R L < -10dB and G T > -2dB, by utilizing arbitrary circuit component values [4]. The proposed method can effectively realize the Smith chart coverage of 50 to 60 % satisfying the same criteria by modifying the combination of discrete set of circuit components.…”

“…Here, the Global Optimization Toolbox of MATLAB was utilized to solve the impedance matching problem. The procedure to evaluate the performance of the circuit design is described in [4]. The return loss and the transducer gain which play an important role for the matching over a large part of the Smith chart are used respectively as the R L and G T optimization parameters of the genetic algorithm.…”

Efficiency enhancement by reconfigurable matching networks in LINC transmitters

“…However, this dependence should be a second-order effect, as the combiner is supposed to be well matched. Figure 2 shows the RMN circuit which is used in this work and whose design details are described in [12]. It consists of an eight-cell structure composed by inductors and capacitors.…”

Analytical Formulas for the Coverage of Tunable Matching Networks for Reconfigurable Applications

“…1 (a). This configuration is different from the one in [6]- [10], [12] where a resistive load is connected at one end with the other end conjugately matched to a known impedance. The configuration used here is particularly suitable for PAs where conjugate matching is not necessarily required.…”

“…In [6]- [11] the boundaries have been presented using simulations, which are less legible, do not indicate the limits of Manuscript received December 1st, 2016; revised January 21st, 2017; accepted March 21st, 2017.…”