Compact microwave distributed-element dual-mode bandpass filter

US9030277B2 · kind B2 · utility

Assignee

• Nanjing University · CN

Inventors

• Jianxin Chen · Sichuan, CN
• C-Y Li · Nantong, CN
• Yang Zhan · Nantong, CN
• Hui Tang · 安丰镇, CN
• Liheng Zhou · Beijing, CN
• Jin-Wei Shi · Nantong, CN
• ZhiHua Bao · Nantong, CN

Key dates

• Filing date: Jun 18, 2013
• Grant date: May 12, 2015
• Expiry date: Oct 16, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01P1/2135
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A compact microwave distributed-element dual-mode bandpass filter is provided, comprising a dual-mode resonator and a signal input port and a signal output port coupled electrically to the dual-mode resonator respectively; wherein, the dual-mode resonator comprises a main stripline with a center-loaded short-circuited stub, the main stripline is reasonably folded in both vertical and horizontal directions and is reasonably folded into a first layer, a second layer, a third layer and a fourth layer; a symmetrical plane is provided between the second layer and the third layer, while the first layer and the fourth layer are symmetrical to each other relative to the symmetrical plane, the second layer and the third layer are symmetrical to each other relative to the symmetrical plane as well; the center-loaded short-circuited stub is located on the symmetrical plane, and the symmetrical plane can be treated as a virtual ground at odd-mode resonant frequency.