Microstrip multi-mode bandpass filter using right-angled triangular resonator

Multi-mode technique has very important application in microwave filter design for implementing miniaturization, wide band and nicer performances. This report presents a new multi-mode bandpass filter with wide passband by using single isosceles right-angled triangular resonator which with much less attention, and transmission zeros and low passband insertion losses are obtained. The new filter has a novel, compact and simple structure as well as nicer performances, and can be quite useful in modern RF/microwave circuits and systems.