Skip to Main Content
Microstrip Filters for RF/Microwave Applications, 2nd Edition
book

Microstrip Filters for RF/Microwave Applications, 2nd Edition

by Jia-Sheng Hong
March 2011
Intermediate to advanced content levelIntermediate to advanced
656 pages
18h 37m
English
Wiley
Content preview from Microstrip Filters for RF/Microwave Applications, 2nd Edition

CHAPTER ELEVEN

Superconducting Filters

Since the discovery of high-temperature superconductors (HTS) in 1986 [1], high-temperature superconductivity has been at the forefront of advanced filter technology and has been changing the way we design communication systems, electronic systems, medical instrumentation, and military microwave systems [2,–7]. Superconducting filters play an important role in many applications, especially those for mobile communication systems [8–28], satellite communications [29–40], and radio astronomy and radars [41–53]. Most superconducting filters are simply microstrip structures using HTS thin films [54–104]. Some typical superconducting filters are described in this chapter. In addition, this chapter will cover some important properties of superconductors and substrates for growing HTS films [105–110], which are essential for the design of HTS microstrip filters.

11.1 HIGH-TEMPERATURE SUPERCONDUCTING (HTS) MATERIALS

11.1.1 Typical HTS Materials

Superconductors are materials that exhibit a zero intrinsic resistance to direct current (dc) flow when cooled below a certain temperature. The temperature at which the intrinsic resistance undergoes an abrupt change is referred to as the critical temperature or transition temperature, denoted by Tc. For alternating current (ac) flow, the resistance does not go to zero below Tc, but increases with increasing frequency. However, at typical RF/microwave frequencies (in the cellular band, for example), the resistance ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Microwave Filters for Communication Systems: Fundamentals, Design and Applications

Microwave Filters for Communication Systems: Fundamentals, Design and Applications

Richard J. Cameron, Raafat Mansour, Chandra M. Kudsia
RF Circuits for 5G Applications

RF Circuits for 5G Applications

Sangeeta Singh, Rajeev Kumar Arya, B. C. Sahana, Ajay Kumar Vyas

Publisher Resources

ISBN: 9781118002124Purchase book