High-performance band-stop filter and communications cavity device thereof

• Main Authors: Di, Yingjie, Guo, Chunbo, Xie, Zhenxiong
• Format: Patent
• Language: English
• Published: 04.07.2019
• Subjects: BASIC ELECTRIC ELEMENTS; BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; WAVEGUIDES

Provided in the present invention is a high-performance band-stop filter, comprising a cavity body and a cover plate covering the cavity body; the cavity body is provided with a longitudinal hollow cavity, two connection ports being formed in two ends of the hollow cavity in a longitudinal direction, a transmission wire used to realize an electrical connection between the two connection ports and a transmission wire cavity used to accommodate the transmission wire being provided in the hollow cavity, one side of the transmission wire cavity is provided with multiple resonant cavities arranged in sequence, each resonant cavity having provided therein a resonant post, each resonant post being provided with an accommodation hole accommodating a resonance-adjusting screw, the transmission wire having provided thereon impedance converter structures corresponding to the resonant posts and capacitively coupled to said resonant posts; resonance-adjusting screws corresponding to each resonant post are suspended on the cover plate, said resonance adjusting screws having non-contact connections to the resonant posts. The present high-performance band-stop filter can realize good results in narrow relative bandwidth, wide pass band and stop band bandwidth, high stop band suppression and low insertion loss. Also provided in the present invention is a communications cavity device including the present high-performance band-stop filter.