Microstrip slow-wave open-loop resonator filters

Microstrip slow-wave open-loop resonators allow various filter configurations including those of elliptic or quasi-elliptic function response to be realised. The filters are not only compact in size due to the slow-wave effect, but also have a wider upper stopband resulting from the dispersion effects. These attractive features mean the microstrip slow-wave open-loop resonator filters hold promise for mobile communications, superconducting and other applications.