Limiting Characteristics for Receiving Small Size Frame Antenna Matching Using Converter Negative Impedance

Design of Low-Power CMOS Limiting Amplifier Using Negative Impedance

In this paper we design the low-power CMOS limiting amplifier using negative impedance, the purpose of using negative impedance is to increase the gain of the amplifier. low-power operations are also done using all the active elements. The LA was implemented in a standard CMOS 0.18um technology. This limiting amplifier is designed for the instrumentation(bio-medical) application. Gain of the am...

An Current Source Using a Negative Impedance Converter (nic) for Electrical Impedance Tomography (eit)

The purpose of this paper is to improve the output impedance of a current source used for Electrical Impedance Tomography (EIT) by using a Negative Impedance Converter (NIC). A Monopolar Howland Current Source(MHCS) and NIC circuits were implemented and then the output impedance was measured by a Data Acquisition (DAC) board of 12 bits resolution. A resistive load was used for investigating the...

Input impedance antenna automatic matching system

This paper presents a new design for an input impedance antenna automatic matching system. In order to achieve this main objective, it is necessary to accomplish several intermediate tasks. On the one hand, a study about the implementation of a generic electronically tunable impedance synthesizer is carried out. Then, a prototype based on the research is constructed, and its characteristics and...

Optimization Algorithm for Antenna Impedance Matching in Digitally Tunable Network

Novel method for planar microstrip antenna matching impedance

Because all microstrip antennas have to be matched to the standard generator impedance or load, the input impedance matching method for antenna is particularly important. In this paper a new methodology in achieving matching impedance of a planar microstrip antenna for wireless application is described. The method is based on embedding an Interdigital capacitor. The fine results obtained by usi...