Owing to its well-known properties of possible power-noise match as well as superior noise performance, the inductively-degenerated low-noise amplifier is nowadays the most-widely used RF pre-amplifier topology. However, there is not much flexibility when setting the amplifier’s input impedance to match the source impedance, as for a given biasing condition, matching is achievable only for a pa...

Owing to its well-known properties of possible power-noise match as well as superior noise performance, the inductively-degenerated low-noise amplifier is nowadays the most-widely used RF preamplifier topology. However, there is not much flexibility when setting the amplifier’s input impedance to match the source impedance, as for a given biasing condition, matching is achievable only for a par...

A two-stage power conditioning circuit consisting of an AC DC converter followed by a DC DC converter is proposed for a vibration-based energy harvesting system. The power conditioning circuit intends to maximize the amount of power extracted from a piezoelectric energy harvester by matching the source impedance with the circuit by adaptively adjusting the duty cycle. An equivalent electrical c...

Any AM antenna system consists of the antenna itself, some sort of transmission line to convey the RF energy from the transmitter to the antenna, and some sort of impedance matching network. Directional antenna systems consist of multiple radiating elements, transmission lines and matching networks. In this paper, we will examine in building-block fashion the components that make up such system...

A new method that is based on genetic algorithm (GA) is developed to design electrical impedance matching network for broadband piezoelectric ultrasound transducer. The new method can both optimize the topology of the matching network and perform optimization on the components at the same time. Results of classical algorithms are referenced to reduce the number of candidate topologies and great...

This paper addresses the performance evaluation of a modified square loop antenna design for UHF RFID applications that is excited through a narrow feed line connected to a square loop, an impedance matching network. The square loop dimensions are modified to reach a conjugate impedance matching. A gap is fixed between the feed-lines to link the chip. To achieve impedance matching, the structur...

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...