Synthesis of Microstrip Filters Using Triangular Open-Loop Resonators

This paper presents a design of microstrip triangular open loop resonator filter. Because of their structure, the triangular open loop coupled resonator offers wide variety of coupling schemes and different in value and sign coupling coefficient. The coupling schemes are electrical, magnetic and mixed. The paper presents three designs of Chebyshev filter with tapped input/output lines based on triangular open loop resonators.. There is a good agreement between the theoretical and EM simulation results.