Spatially Resolved Analyses of Microwave and Intermodulation Current Flow Across HTS Resonator Using Low Temperature Laser Scanning Microscopy

Details Spatially Resolved Analyses of Microwave and Intermodulation Current Flow Across HTS Resonator Using Low Temperature Laser Scanning Microscopy Spatially Resolved Analyses of Microwave and Intermodulation Current Flow Across HTS Resonator Using Low Temperature Laser Scanning Microscopy

2004-01-26

arxiv.org/abs/cond-mat/0401518v1

MSMW'04 Symposium Proceedings. Kharkov, Ukraine, June 21-26, 2004.

Physics

Condensed Matter

Superconductivity

3 pages, 4 figures, presented at the Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter

Scientific paper

Microwave resonators made from high-temperature superconducting (HTS) films are becoming increasingly commercially competitive in the market of modern communication technologies. However, unlike normal metals, the HTS device performance suffers from intrinsically nonlinear electrodynamics, resulting in harmonic generation and intermodulation (IM) distortion at all levels of circulating power. The dominant sources of IM response are believed to be inductive and localized in only small regions of the HTS film having the highest current densities J_RF(x,y). In our previous papers, examining microwave resonators of simple microstrip geometry, we have demonstrated that local nonlinearity imaging is possible with the technique of low temperature laser scanning microscopy (LTLSM) adapted to microwave experiments. Unique contrast due to IM current density J_IM(x,y) was generated by the IM imaging method. It was applied to display the regions showing large nonlinear LTLSM photoresponse (PR) in HTS devices with a few-micrometer spatial resolution. Direct local correlation between J_IM(x,y) and high J_RF(x,y) at the edges of the strips, typical defects like twindomain blocks, in-plane rotated grains and micro-cracks was shown. Here we want to indicate that the geometrical features in HTS circuit layout for microwave devices of more complex geometry also radically affect the linear device performance.

Affiliated with

Also associated with

No associations

Rating

Spatially Resolved Analyses of Microwave and Intermodulation Current Flow Across HTS Resonator Using Low Temperature Laser Scanning Microscopy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spatially Resolved Analyses of Microwave and Intermodulation Current Flow Across HTS Resonator Using Low Temperature Laser Scanning Microscopy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatially Resolved Analyses of Microwave and Intermodulation Current Flow Across HTS Resonator Using Low Temperature Laser Scanning Microscopy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-143134