Design of a Trisection Wideband Microstrip Bandpass Filter with Frequency Dependent Coupling
- Resource Type
- Conference
- Authors
- Wu, Xinghong; Wei, Xubo; Shi, Yu
- Source
- 2018 10th International Conference on Communications, Circuits and Systems (ICCCAS) Communications, Circuits and Systems (ICCCAS), 2018 10th International Conference on. :136-139 Dec, 2018
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Band-pass filters
Couplings
Resonator filters
Resonators
Wideband
Frequency dependence
Filtering theory
wideband
bandpass filter
frequency dependent coupling
matrix
electromagnetic coupling
transmission zero
- Language
This paper presents a novel trisection wideband bandpass filter which is centered at 3.6 GHz with 50% fractional band width. The design process of this filter is based on frequency dependent coupling matrix. The frequency dependent coupling is introduced to the filter by separate electromagnetic coupling paths. Two transmission zeros are achieved near the passband. Another transmission zero is generated by harmonic effect. These transmission zeros together improve the selectivity of the filter. The filter was manufactured and measured. Measurements are in good agreement with the simulations.