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Geometric shaping microwave resonator

A resonator and microwave technology, applied in the direction of resonators, waveguide devices, circuits, etc., can solve problems such as electromagnetic compatibility of external circuits, reduce the complexity of processing and assembly, improve processing flexibility and process compatibility , The effect of expanding the range of spurious resonant frequencies

Active Publication Date: 2020-11-24
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this will generate electromagnetic radiation in the upper stop band of the filter, which will bring electromagnetic compatibility problems to the external circuit, and is not conducive to the communication system to suppress external interference signals in the upper stop band

Method used

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Embodiment 1

[0040] see figure 1 and figure 2 , figure 1 A three-dimensional structure diagram of a geometrically shaped microwave resonator provided in Embodiment 1 of the present invention. In Embodiment 1 of the present invention, the geometrically shaped microwave resonator includes a metal shell 1a and two waveguide flanges 2a, two coupling windows 23a are symmetrically opened on the metal shell 1a, and the two waveguide flanges 2a They are respectively arranged at two coupling windows 23a, and the waveguide flange 2a is provided with a feeding rectangular waveguide 21a communicating with the coupling window 23a. The setting of the two feeding rectangular waveguides 21a and the two coupling windows 23a can realize the The plastic resonant cavity 10a inside the body 1a performs two-port weak coupling feeding. Wherein, the plastic resonant cavity 10a is filled with air, and the metal shell 1a is made of metal, or is made of other insulating materials coated with a metal layer on the...

Embodiment 2

[0052] see Image 6 and Figure 7 , Image 6 A perspective view of a geometrically shaped microwave resonator provided in Embodiment 2 of the present invention, Figure 7 A cross-sectional view of the plastic resonant cavity 10b provided in Embodiment 2 of the present invention. The difference between the second embodiment and the first embodiment is that the size of the shaped resonant cavity 10b in the second embodiment is scaled down in the direction of the y axis, so that the cross section of the shaped resonant cavity 10a on the xoy plane is elliptical, namely The shaped resonant cavity 10b in the second embodiment can be equivalently considered to be shaped by an elliptical hemispherical cavity. The ratio of the short axis to the long axis of the elliptical hemispherical cavity is 0.5 to 1, and the shorter the short axis of the elliptical hemispherical cavity, the lower the unloaded Q value. In the direction of the ox axis, the dimensions of the irregular resonant ca...

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Abstract

The invention provides a geometric shaping microwave resonator. The resonator comprises a metal shell and two waveguide flange plates, a shaping resonant cavity is formed in the metal shell; the shaping resonant cavity is formed by removing a shaping circular ring body, a first shaping hemisphere and a second shaping hemisphere from a hemisphere cavity; the inner wall of the hemispherical cavity comprises a radial tangent plane and a hemispherical surface connected to the radial tangent plane; the radial tangent plane is perpendicular to the end face where the rectangular waveguide port of thewaveguide flange plate is located; the shaping circular ring body is formed by recessing the circumference of the radial section towards the interior of the hemispherical cavity, the first shaping hemisphere is formed by recessing the hemispherical surface towards the interior of the hemispherical cavity, the second shaping hemisphere is formed by recessing the radial section towards the interiorof the hemispherical cavity, and the cavity wall of the shaping resonant cavity is arranged smoothly. According to the geometric shaping microwave resonator provided by the invention, the requirements of high Q value, far parasitic resonance and non-radiative upper stop band of the resonant cavity are met at the same time through a geometric shaping method, and the process compatibility of the resonant cavity structure to the subtractive manufacturing and additive manufacturing technologies is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic fields and microwaves, and in particular relates to a geometrically shaped microwave resonator. Background technique [0002] High quality factor (Q value) and far spurious resonant modes are the basic requirements for resonators in microwave filters of communication systems. The high-Q resonator can make the filter obtain smaller passband insertion loss under the same bandwidth. The far spurious resonance mode can make the upper stop band of the bandpass filter realize a wide bandwidth and high rejection, so as to reduce the influence of harmonics and interference signals in the stop band. Air-filled rectangular, cylindrical and spherical resonators are several commonly used high-Q cavity resonators. Among them, the spherical cavity has the highest Q value, but its higher-order mode is closer to the fundamental mode than the rectangular cavity. [0003] In the prior art, the goal of min...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P7/00
CPCH01P7/00
Inventor 李津陈哲袁涛
Owner SHENZHEN UNIV
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