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A Bandpass Filter Based on Sector Microstrip Resonator

A technology of band-pass filter and microstrip resonance, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problem of large insertion loss of filters, achieve high stop-band suppression characteristics, and improve the effect of stop-band characteristics

Active Publication Date: 2021-08-03
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

Although this technology realizes the miniaturization design of the filter, the shortcoming of this method is obvious, because the characteristics of the slow wave structure itself cause the insertion loss of the filter to be large (A.Ebrahimi, W.Withayachumnankul, S.F.Al-Sarawi andD. Abbott, "Compact Second-Order Bandstop Filter Based on Dual-Mode Complementary Split-Ring Resonator", Microwave and Wireless Components Letters, IEEE, vol.26, pp.571-573, 2016)

Method used

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  • A Bandpass Filter Based on Sector Microstrip Resonator
  • A Bandpass Filter Based on Sector Microstrip Resonator
  • A Bandpass Filter Based on Sector Microstrip Resonator

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Embodiment 1

[0020] figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention, including a fan-shaped microstrip resonator 1 , input and output feeders 2 and metallized through holes 3 . The fan-shaped microstrip resonator 1 is sequentially formed by stacking the top fan-shaped metal patch 10, the single-layer dielectric substrate 11 of the middle layer and the bottom metal patch 12 from top to bottom. The radius of the top fan-shaped metal patch 10 It is 27mm, the radian is 22.5°, the thickness is 0.017mm, and the size is equivalent to one sixteenth of the circular metal patch with the same radius. The single-layer dielectric substrate 11 of the middle layer is a low-loss TaconicRF-35 with a thickness of 0.508 mm. It is in the shape of a right-angled trapezoid, with an upper base length of 11.46 mm, a lower base length of 23.92 mm, and a height of 30.1 mm. The size of the bottom metal patch 12 is the same as that of the single-layer die...

Embodiment 2

[0024]In this embodiment, the shapes of the single-layer dielectric substrate 11 and the bottom metal patch 12 of the middle layer are changed from a right-angled trapezoid to any other shape at the same time, while ensuring the shape of the single-layer dielectric substrate 11 of the middle layer and the bottom metal patch 12 The same size and its outer frame size needs to exceed the outer frame size of the fan-shaped metal patch 10 on the top layer plus the input and output feeder 2, and the input and output feeder ports need to be in the outer outline of the single-layer dielectric substrate 11 and the bottom metal patch 12 in the middle layer Online, other parts are completely the same as those in Embodiment 1, and the functions of the present invention can still be realized.

Embodiment 3

[0026] In this embodiment, the transmission line structure of the input and output feeder 2 is changed from a gradual transmission line to a step impedance transmission line structure, and other parts are completely the same as in the first embodiment, and the functions of the present invention can still be realized.

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Abstract

The invention discloses a bandpass filter based on a fan-shaped microstrip resonator, which includes a fan-shaped microstrip resonator, input and output feeders, and metallized through holes. The metallized through holes serve as a disturbance structure to make the first two The resonant frequency of the resonant mode is close to form a passband. At the same time, using the signal phase theory, a transmission zero is introduced in the stopband without changing the size and structure of the original resonant cavity, achieving better out-of-band suppression characteristics. The invention can be used in microwave and millimeter wave communication and radar systems with higher requirements for out-of-band suppression performance. At the same time, the invention also has the advantages of miniaturization, light weight, easy integration and low cost, and can better adapt to the requirements of modern communication and radar systems.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave filters, and relates to a microstrip filter. Background technique [0002] With the rapid development of modern microwave and millimeter wave circuit systems, the system puts forward more complex functional requirements and higher electrical performance indicators for each component. In earlier microwave and millimeter wave circuit systems, most transmission lines and passive circuit structures were made based on metal waveguides. This structure has the advantages of high Q value, low loss, and high power capacity, but processing and debugging are relatively difficult. Therefore, in order to meet the miniaturization and integration requirements of modern microwave and millimeter wave circuit systems, planar integrated transmission lines have emerged, and the microstrip line structure has received high attention and extensive research. Compared with metal waveguide transmissi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/207
CPCH01P1/207
Inventor 张永鸿刘家玮伯晓乐敬怀舒屈丽丽樊勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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