Capacitors in Broadband

Capacitors in Broadband ApplicationsCapacitors in Broadband Applications
Proper selection of capacitors for RF broadband applications requires careful evaluation of frequency dependent parameters and circuit design requirements

By Richard Fiore American Technical Ceramics
n today’s rapidly expanding RF and microwave markets, numerous designs must operate over multiple octaves of frequency spectrum. Some of the more common of these include broadband bias networks such as transistor emitter and FET source bypassing, transistor collector and FET drain feed structures, as well as interstage RF coupling, DC blocking and wideband impedance matching. v Figure 1. Interstage coupling, 50 MHz to 3.6 GHz. This article will explore various ways to accommodate broadband Note: The coupling capacitor C0 is represented with its equivalent