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 SIX

Highpass and Bandstop Filters

In this chapter, we will discuss some typical microstrip highpass and bandstop filters. These include quasilumped element and optimum distributed highpass filters, narrow- and wide-band bandstop filters, as well as filters for RF chokes. Design equations, tables, and examples are presented for easy reference.

6.1 HIGHPASS FILTERS

6.1.1 Quasilumped Highpass Filters

Highpass filters constructed from quasilumped elements may be desirable for many applications, provided that these elements can achieve good approximation of desired lumped elements over an entire operating frequency band. Care should be taken when designing this type of filter, because as the size of any quasilumped element becomes comparable with the wavelength of an operating frequency, it no longer behaves as a lumped element.

The simplest form of a highpass filter may just consist of a series capacitor, which is often applied for direct current or dc block. For more selective highpass filters, more elements are required. This type of highpass filter can be easily designed based on a lumped-element lowpass prototype, such as one shown in Figure 6.1a, where gi denotes the element values normalized by a terminating impedance Z0 and obtained at a lowpass cutoff frequency Ωc. Following the discussions in the Chapter 3, if we apply the frequency mapping

(6.1) Numbered Display Equation

Ω and ω are the angular ...

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