Stability Analysis and Design of Negative Impedance Converters: Application to Circuit and Small Antennas Articles uri icon

authors

  • SEGOVIA VARGAS, DANIEL
  • JIMÉNEZ MARTÍN, JOSÉ LUIS
  • Parra Cerrada, Ángel
  • ALBARRACIN VARGAS, LUIS FERNANDO
  • UGARTE MUÑOZ, EDUARDO
  • GONZALEZ POSADAS, VICENTE

publication date

  • September 2016

start page

  • 409

end page

  • 418

issue

  • 3

volume

  • 25

International Standard Serial Number (ISSN)

  • 1210-2512

abstract

  • Negative impedance converters (NICs) have been proposed as structures to improve the performance of RF circuits and electrically small antennas. However, NICs suffer from stability problems. This paper presents a compact procedure to analyze the stability of NICs. Then, the required and sufficient conditions to predict the stability of a negative impedance converter are given. These conditions can be evaluated using standard computer-aided design software. Finally, a NIC prototype is given to validate and illustrate the presented design procedure, it is also integrated with a printed, blade-type, electrically small monopole in the VHF band.

keywords

  • negative impedance converter (nic); stability; network nyquist test; electrically small antennas; microwave circuits; power-gain; amplifiers; elements