Microwave Amplifier Figure of Merit Measurement

Microwave Amplifier Figure of Merit Measurement

Fig.2 Amplifier under test. Amplifiers can operate in classes A, B, AB, C, D, E and F [2]. We tested class A amplifier made by „Microwave Power Devices“, Model: LWA 4690-1/1837, based on bipolar devices (Fig.2). Usually, 1dB compression point, gain and two-tone third-order intercept point are measured as the amplifier figure of merit. As specified by manufacturer, the frequency range of the amp...

Measurement of the Figure-of-merit of Thermoelectric Devices

The apparatus for evaluation of the figure of merit (ZT) of thermoelectric devices has been developed. ZT value is comprised of three physical quantities, Seebeck coefficient, electrical conductivity, and thermal conductivity. However, to date, the ZT values of the thermoelectric devices have been evaluated by Harman method due to difficulty in measuring thermal conductivity of the devices with...

Direct measurement of thin-film thermoelectric figure of merit

Rajeev Singh, Zhixi Bian, Ali Shakouri, Gehong Zeng, Je-Hyeong Bahk, John E. Bowers, Joshua M. O. Zide, and Arthur C. Gossard Baskin School of Engineering, University of California, Santa Cruz, California 95064, USA Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106, USA Department Materials, University of Santa Barbara, California 93106...

Figure of Merit and Limiting Characteristics of Tunable Ferroelectric Microwave Devices

Microwave application of ferroelectrics is very promising for electrically tunable microwave devices based on the electric field dependence of the dielectric permittivity. Tunable filters and controllable phase shifters are successfully designed as integrated circuits based on multilayer structures containing thin epitaxial ferroelectric (FE) film. As a rule lumped ferroelectric capacitors are ...

Interpreting the Dark Energy Figure of Merit