Showing papers by "Per-Simon Kildal published in 1999"

Equivalent circuits of receive antennas in signal processing arrays

Abstract: This letter presents a complete equivalent circuit of a receive antenna. The induced voltage or current in this equivalent circuit is expressed in terms of the radiation field function of the element and of the amplitude and phase of the incoming wave. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 244–246, 1999.

Gaussian vertex plate improves return loss and far-out sidelobes in prime-focus reflector antennas

Abstract: Vertex plates are commonly used to improve the return loss of primary-fed reflector antennas. We propose a new type of vertex plate with a Gaussian thickness profile that gives lower far-out sidelobes of the radiation pattern of the reflector antenna than the standard vertex plate with constant thickness. We derive the dimensions of this vertex plate needed to cancel the field at the focus of the reflector. We apply the design rules to improve the return loss (RL) of a primary-fed reflector with hat feed, and simulate it by using a computer code based on the finite-difference time-domain (FDTD) technique. The results verify the improvements of the radiation pattern obtained by using a Gaussian vertex plate rather than a standard one. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 125–129, 1999.

A user-friendly computer code for radiated emission and susceptibility analysis of printed circuit boards

Abstract: A User-friendly Computer Code for Radiated Emission and Susceptibility Analysis of Printed Circiut Boards