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Novel high-selectivity ultra wide band band-pass filter

A band-pass filter, high-selectivity technology, used in waveguide-type devices, resonators, electrical components, etc., to achieve the effects of simple design, convenient processing, and low cost

Inactive Publication Date: 2017-06-20
HARBIN FEIYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it also poses more challenges to us, because most of the existing communication systems work in the same frequency band, and the problem of mutual interference will have to be considered

Method used

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Embodiment Construction

[0018] The invention designs a novel high-selectivity ultra-wideband band-pass filter, which has a wider pass band, smaller return loss and insertion loss, and good out-of-band characteristics.

[0019] The invention will be described in more detail below in conjunction with the accompanying drawings:

[0020] An example of the present invention is figure 2 As shown, the dielectric substrate (10) is FR-4 with a dielectric constant of 4.9, the thickness of the dielectric substrate is 1 mm, and the metal ground plate (9) with dumbbell-shaped grooves under the dielectric substrate is made of copper material.

[0021] Such as figure 1 As shown, the present invention is a novel high-selectivity ultra-wideband bandpass filter. The open-circuit stub structure (3) and the microstrip structure (5) of the 50-ohm stub on the dielectric substrate are made of copper material.

[0022] Design parameters of a novel high-selectivity ultra-wideband bandpass filter of the invention:

[0023...

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Abstract

A novel high-selectivity ultra wide band band-pass filter disclosed by the present invention is composed of an open circuit stub structure (3), 50-Ohm stub microstrip structures and a metal grounding plate which is on the lower surface of a dielectric slab and is equipped with a dumbbell-shaped groove. The novel high-selectivity ultra wide band band-pass filter of the present invention utilizes an intersected coupling structure composed of three 50-Ohm transmission microstrip lines to realize the ultra wide band, has very small return loss and insertion loss and the good low-frequency characteristic and the harmonic suppression performance, is simple in design, compact in structure, beautiful in appearance and low in cost, is convenient to process, and can realize the ultra wide band of 3.1-10.6 GHz.

Description

technical field [0001] The invention relates to a novel high-selectivity ultra-wideband bandpass filter, which can realize ultra-wideband in the 3.1-10.6GHz frequency band. Background technique [0002] UWB technology appeared in the late 1950s and was mainly used in military radars and communication systems with low intercept rates until the 1990s. In recent years, with the development of microelectronic device technology and technology, UWB technology has only begun to be gradually applied in the civilian field. On February 14, 2002, ultra-wideband wireless technology was first approved by the FCC of the Federal Communications Commission of the United States and can be used in short-distance wireless communications. This opened the door for the commercial application of ultra-wideband technology products and promoted ultra-wideband systems and Its devices such as: UWB filter, UWB antenna, UWB amplifier and other research progress. [0003] UWB technology can be applied i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203H01P7/08
CPCH01P1/20H01P1/203H01P7/08H01P7/082
Inventor 王燕燕高爽孟祥余
Owner HARBIN FEIYU TECH
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