Balancing tri-frequency bandpass filter

• Main Authors: XU, HONG-ZHI, XU, CHONG-YI, LI, QING-HE
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; WAVEGUIDES

A balancing multi-frequency bandpass filter comprises a substrate, a grounding surface disposed onto the first surface of the substrate, first to fourth harmonic oscillation units disposed onto the second surface of the substrate and mutually spaced at intervals, and two through-holes. Part of the first and second harmonic oscillation units are spaced at intervals in parallel to be mutually coupled, part of the third and fourth harmonic oscillation units are spaced at intervals in parallel to be mutually coupled, part of the second and third harmonic oscillation units are spaced at intervals in parallel to be mutually coupled, and each of the first to fourth harmonic oscillation units includes two harmonic oscillators separately located at two opposite sides of a symmetric plane. The two through-holes are disposed along the symmetric plane, and the second harmonic oscillation unit is electrically connected to the grounding surface through one of the through-holes, while the third harmonic oscillation unit is