Miniatured Planar Bandpass Filter Using Coupled Metamaterial Resonators

In this article, new microstrip slow-wave bandpass filters using open loop resonator loaded with interdigital capacitive fingers is proposed. The filter features not only compact in size, but also exhibits spurious stop-band rejection. Filters of this type with elliptic function and Chebyshev response are demonstrated. There is good agreement between experimental and full-wave electromagnetic (EM) simulation results.