This paper presents the design methodology for dual-band impedance matching networks using a cascade configuration of filters and phase shifters. The proposed design offers a simple and linear procedure for matching complex frequency dependent loads. Moreover, the feasibility of this method is not limited by realization limitations encountered in conventional design techniques of dual-band band matching networks. The advantages of the proposed methodology also include design miniaturization, low loss performance, and independent matching of the two bands. The proposed concept is both theoretically and experimentally investigated using two prototype circuits for dual-band matching networks. The simulation and measurement results are in close agreement confirming the validity of the proposed concept.

This article presents a systematic and an efficient synthesis technique for designing single-band and dual-band waveguide (WG) filters with transmission zeros (TZs). The proposed electro-magnetic (EM)-based synthesis technique directly results in a filter design with an RF performance that is in excellent agreement with the ideal filter performance, thus significantly reducing the post fine optimization effort. Furthermore, the proposed technique also reduces the EM simulation resources required for the filter synthesis. The synthesis technique is lucidly explained by designing a symmetrical 6th-order WG filter with four TZs, a 9th-order filter with three asymmetric TZs and a 6th-order dual-band filter. To the best of the author’s knowledge, this is the first filter synthesis technique, which can be adopted to design WG filters, including TZs with minimum or no post fine optimization.

Out-of-plane Micro-Power Generators (MPG) are investigated to identify their optimal design and operating conditions. Those MPGs employ a variable capacitor, an electret layer embedded between its electrodes, and an inertial mass carried by a movable electrode. Using a linear model, we study the impact of varying the capacitor gap, load resistance, and electret voltage on the output power. In addition, we analyze the effect of squeeze-film damping on the MPG performance. We find that the linear model breaks down as the excitation level increases. A nonlinear model is developed to capture the MPG response and estimate its output power in closed-form.