Title :
Effects of interface conditions and long-term stability of passive intermodulation response in printed lines
Author :
Shitvov, Alexey P. ; Olsson, T. ; Francey, Jim ; Zelenchuk, Dmitry E. ; Schuchinsky, Alexander G. ; El Banna, B.
Author_Institution :
Inst. of Electron., Commun. & Inf. Technol. (ECIT), Queen´s Univ. of Belfast, Belfast, UK
Abstract :
An experimental investigation of the effect of conductor-to-substrate interface on distributed passive intermodulation (PIM) generation in printed microstrip lines has been undertaken using the custom-designed microwave laminates with removed surface bonding layers and with the commercial adhesion promotion applied to the conductor underside. The study of long-term stability of PIM performance of the printed circuits is reported for the first time. The comprehensive measurement results, observations of the self-improvement of the PIM performance and the effect of panel bending on PIM generation in printed boards with different finishing are presented. A consistent physical interpretation of the observed phenomena is proposed. The results of this study provide new important considerations for the design and characterisation of low-PIM printed circuits.
Keywords :
circuit stability; intermodulation; microstrip lines; printed circuit design; conductor-to-substrate interface; custom-designed microwave laminates; distributed passive intermodulation generation; interface conditions; long-term stability; passive intermodulation response; printed circuits; printed microstrip lines; surface bonding;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2010.0070
