Bioinspired metagel with broadband tunable impedance matching

Interfacial structure designs with impedance-matching for ideal broadband antireflections

Optimization Algorithm for Antenna Impedance Matching in Digitally Tunable Network

Tapered labyrinthine acoustic metamaterials for broadband impedance matching

We present five kinds of labyrinthine or space-coiling acoustic metamaterials with tapered channels and apertures. These designs exhibit negative index behavior with modest dispersion, and also have substantially improved impedance matching compared to previously investigated labyrinthine cells. Experimentally measured effective material parameters are in good agreement with numerically compute...

The First Active Tunable Wideband Impedance Matching Circuit

The first transistor-based impedance matching circuit for radio-frequency (RF) applications is introduced in this paper. It adapts arbitrary output impedances of RF blocks to desired values between 50 and 250 , from 0 to 5GHz, while occupying only 0.005mm2 of circuit area in a 0.35μm SiGe BiCMOS process. Its superiority over traditional passive-element networks can be resumed by the following f...

Electronically Tunable Impedance-Matching Networks for Intelligent RF Power Amplifiers

This paper presents the simulation and optimization design of the electronically tunable impedance-matching networks for intelligent RF power amplifiers in a cognitive radio system. Reconfigurable elements, such as varactors and RF switches are utilized to achieve the dynamic impedance matching both in the input and output matching circuit, providing coarse and fine tuning of the target impedan...