Compact Cross-Coupled Bandpass Filter With Second and Third Harmonic Suppression
- Resource Type
- Conference
- Authors
- Liu, Baoguang; Lyu, Yunpeng; Cheng, Chonghu
- Source
- 2019 International Conference on Microwave and Millimeter Wave Technology (ICMMT) Microwave and Millimeter Wave Technology (ICMMT), 2019 International Conference on. :1-3 May, 2019
- Subject
- Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
- Language
A compact cross-coupled bandpass filter with second and third harmonic suppression is proposed. Quarter-wavelength resonators and 0° feed structure are introduced to suppress second and third spurious responses. The measured return loss and insertion loss of the proposed filter with four quarter-wavelength resonators are better than 17.2 dB and less than 1.85 dB in the range of 3.42 GHz to 3.6 GHz, respectively, and the upper stopband is up to $3.7f_{0}$ with an insertion loss larger than 20.1 dB.