Millimeter-wave broadband band-pass filter

A band-pass filter and high-pass filter technology, applied in the field of filters, can solve the problems of narrow bandwidth, complex structure, difficult processing and assembly, etc., and achieve the effect of small size, small volume and low processing cost

Inactive Publication Date: 2013-12-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

Typical frequency responses include low-pass, high-pass, band-pass and band-stop characteristics. In fact, filters have been widely used in various types of communication, radar test or measurement systems, but the current broadband filters are generally three-dimensional structures. Complex structure, difficult processing and assembly, and narrow bandwidth

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  • Millimeter-wave broadband band-pass filter

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] The millimeter-wave broadband bandpass filter in this embodiment is realized by a filter cascading method, including a high-pass filter, a low-pass filter and a cascaded matching circuit between them, and the high-pass filter The cutoff frequency is lower than the cutoff frequency of the low pass filter. like figure 1 As shown, the high-pass filter is composed of a substrate-integrated waveguide 1, and the low-pass filter is composed of a compact microstrip resonant unit 2. Two matching circuits 3 are used as a cascaded connection between the substrate-integrated waveguide 1 and the compact...

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Abstract

The invention discloses a millimeter-wave broadband band-pass filter which is applicable to a 25-50 GHz frequency band and based on substrate-integrated waveguides. The filter includes a serially connected high-pass filter and low-pass filter and a cascade matching circuit arranged between the high-pass filter and the low-pass filter. A cut-off frequency of the high-pass filter is lower than a cut-off frequency of the low-pass filter. The high-pass filter includes substrate-integrated waveguides (1) and the low-pass filter includes compact microstrip resonance units (2). The cascade matching circuit is two sections of matching circuits (3). The millimeter-wave broadband band-pass filter applies the substrate-integrated waveguides and realizes a filtering function through a filter cascade method. The filter is simple in structure, visually observable, planar in structure, small in size, convenient to manufacture and convenient for integration of other circuits.

Description

technical field [0001] The invention belongs to the technical field of filters, and in particular relates to a millimeter-wave broadband bandpass filter based on a substrate integrated waveguide suitable for the 25-50 GHz frequency band. The device has relatively high performance in millimeter-wave wireless communication and circuit miniaturization. Value. Background technique [0002] Millimeter wave is a broad frequency range from 30GHz to 300GHz. Compared with light waves, millimeter waves have less attenuation when propagating through the atmospheric window (when millimeter waves and submillimeter waves propagate in the atmosphere, some attenuation is minimal due to the resonance absorption of gas molecules), and are affected by natural light and heat radiation. The influence of the source is small, it has an extremely wide bandwidth, and it also has the advantages of beam slaughter, little influence from the climate, and the corresponding device size is small. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203
Inventor 张勇王云飞钟伟任田昊胡天涛徐锐敏徐跃杭
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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