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A Cross-Coupled Terahertz Rectangular Cavity Filter with Transmission Zeros

A cavity filter and cross-coupling technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problems of cross-coupling implementation difficulties, filter size sensitivity, small device size, etc., and avoid inconvenient processing and out-of-band Inhibit good effect

Inactive Publication Date: 2017-10-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high frequency of terahertz, the size of the corresponding device is very small, and the coupling structure of the filter is extremely sensitive to the size, which makes it very difficult to achieve cross-coupling. The above-mentioned terahertz filters fail to achieve cross-coupling

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  • A Cross-Coupled Terahertz Rectangular Cavity Filter with Transmission Zeros
  • A Cross-Coupled Terahertz Rectangular Cavity Filter with Transmission Zeros
  • A Cross-Coupled Terahertz Rectangular Cavity Filter with Transmission Zeros

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] The present invention is a cross-coupled terahertz rectangular cavity filter with a transmission zero, with a center frequency of 300 GHz and a bandwidth of 10 GHz. The transmission zeros are located at 290 GHz and 311 GHz, and its structure is as follows Figure 5 , 6 , 7 and Figure 8 As shown, the structure of the upper and lower parts of the filter is mirror-symmetrical, and its upper part includes a first transition waveguide 101, a transition step 301, an input waveguide 102, a first resonant cavity 103, and a second resonant cavity 104. The lower half includes the second transition waveguide 201, the transition step 302, the output waveguide 202, the third resonant cavity 203 and the fourth resonant cavity 204, the coupling window 105 of the first resonant cavity 103 and the fourth resonant cavity 204 and the second resonant cavity 104...

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Abstract

The invention discloses a cross-coupling terahertz rectangular cavity filter with a transmission zero point. The filter structure includes a transition, a rectangular resonant cavity and a coupling window. The present invention takes the fourth-order Chebyshev filter as the prototype, and the resonant cavity is arranged according to the CQ topological structure, and the upper and lower sides are mirror-symmetrical; the main coupling of the filter is realized by offsetting the H plane and opening a rectangular window, and its cross-coupling is through the resonant cavity The coupling window between is realized. The filter provided by the invention has low return loss in the pass band, small insertion loss, a transmission zero point at both ends of the pass band, and high suppression effect. The invention realizes cross-coupling in the terahertz frequency band for the first time, has excellent performance and simple structure, and is especially suitable for layered thick film processes such as SU‑8.

Description

technical field [0001] The invention relates to a basic functional device in the terahertz application field, especially suitable for layered thick film processes such as SU-8, and specifically refers to a cross-coupled terahertz rectangular cavity filter with transmission zero. Background technique [0002] In a broad sense, terahertz refers to electromagnetic waves in the 0.1THz-10THz frequency band. It is connected to the millimeter wave frequency band and the far infrared frequency band. It is mainly used in radar, communication, electronic countermeasures, medical imaging, astronomy, non-destructive testing, security inspection and many other fields. , therefore, it is of great significance to carry out research on terahertz devices. As a widely used passive device, research on terahertz filters is attracting increasing attention. Due to the high frequency of terahertz, some traditional planar structure filters, such as microstrip and coplanar waveguide filters, have la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/208
Inventor 董宇亮陶梦婷徐军李桂萍姜宝钧张小川王茂琰喻梦霞
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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