Skip to main content
Open Access Publications from the University of California

Circuit modeling methodology for UWB omnidirectional small antennas

  • Author(s): Wang, Stanley B
  • Niknejad, Ali M
  • Brodersen, Robert W
  • et al.

In ultra-wideband (UWB) systems, antennas act as filters that introduce a frequency dependent response from the transmitter to receiver. To capture the waveform dispersion so that one can equalize/compensate at the transmitter/receiver, a new circuit modeling methodology that handles onmidirectional small antennas is proposed. By transforming the antennas into the degenerated Foster canonical forms and utilizing the waveform-onmidirectional property, it is shown that the transmitted far field waveform is a scaled version of the voltage across the radiation resistor in the model. Extended Thevenin/Norton equivalent circuits with dependent sources tracking the frequency dependence of the antenna effective length are also built for UWB receiving antennas. Simulation and experimental results show that this methodology is effective over a wide bandwidth and suitable for modeling most UWB antennas.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View