mmWave broadband bandpass filter

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

Inactive Publication Date: 2016-01-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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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

Method used

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Embodiment Construction

[0030] 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.

[0031] 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. Such as 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 comp...

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Abstract

The invention discloses a millimeter-wave broadband band-pass filter based on a substrate integrated waveguide suitable for the 25-50 GHz frequency band, including a high-pass filter, a low-pass filter and a cascaded matching between the two in series circuit, the cut-off frequency of the high-pass filter is lower than the cut-off frequency of the low-pass filter, the high-pass filter is composed of a substrate integrated waveguide (1), the low-pass filter is composed of a compact microstrip resonant unit (2), cascaded The matching circuit is a two-section matching circuit (3). The millimeter-wave broadband bandpass filter of the present invention uses a substrate integrated waveguide and realizes the filtering function through a filter cascading method.

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 Patents(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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