Title :
Effects of Geometrical Discontinuities on Distributed Passive Intermodulation in Printed Lines
Author :
Shitvov, Aleksey P. ; Olsson, Torbjörn ; El Banna, Benjamin ; Zelenchuk, Dmitry E. ; Schuchinsky, Alexander G.
Author_Institution :
Inst. of Electron., Commun. & Inf. Technol., Queen´´s Univ. of Belfast, Belfast, UK
Abstract :
This paper presents the results of experimental study of passive intermodulation (PIM) generation in microstrip lines with U-shaped and meandered strips, impedance tapers, and strips with the profiled edges. It is shown that the geometrical discontinuities in printed circuits may have a noticeable impact on distributed PIM generation even when their effect is indiscernible in the linear regime measurements. A consistent interpretation of the observed phenomena has been proposed on the basis of the phase synchronism in the four-wave mixing process. The results of this study reveal new features of PIM production important for the design and characterization of low-PIM microstrip circuits.
Keywords :
microstrip circuits; microstrip discontinuities; printed circuits; U-shaped strip; distributed passive intermodulation; four-wave mixing; geometrical discontinuities; impedance tapers; meandered strip; microstrip circuits; microstrip lines; passive intermodulation generation; phase synchronism; printed circuits; printed lines; profiled edge strips; Distributed nonlinearity; microstrip discontinuities; passive intermodulation (PIM); printed circuits;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2009.2038456
