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Compensated micro-band resonance device and microband open-loop coupled band filter with harmonic inhibition

A band-pass filter and harmonic suppression technology, applied in resonators, waveguide-type devices, circuits, etc., can solve problems such as can not meet the needs and applications well, low attenuation, etc., and achieve increased characteristic impedance and increased Out-of-band suppression, the effect of increasing the circuit area

Inactive Publication Date: 2006-03-15
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
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AI Technical Summary

Problems solved by technology

However, due to the parasitic passband effect of the microstrip circuit, the attenuation at the second-order harmonic is small, which cannot well meet the needs and applications in actual circuits.

Method used

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  • Compensated micro-band resonance device and microband open-loop coupled band filter with harmonic inhibition
  • Compensated micro-band resonance device and microband open-loop coupled band filter with harmonic inhibition
  • Compensated micro-band resonance device and microband open-loop coupled band filter with harmonic inhibition

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Embodiment Construction

[0022] Embodiments and detailed descriptions of the microstrip open-loop coupled bandpass filter with harmonic suppression function designed by the present invention are as follows. All embodiments are fabricated on a F4B substrate with a dielectric constant of 2.65 and a thickness of 1 mm. The present invention can also be fabricated on other substrates, which all belong to the protection scope of the present invention.

[0023] Such as image 3 As shown, the compensation type microstrip resonator of the present invention includes a microstrip resonant unit 10 and open-circuit compensation microstrip lines 11, 12, and an open-circuit compensation microstrip line 11, 12 is respectively connected in parallel in the middle of the microstrip resonator unit; The microstrip resonant unit includes an input terminal 13, an output terminal 14, a group of folded microstrip lines 15, 16 and an intermediate microstrip line 17. The two ends of the middle microstrip line 17 are respective...

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Abstract

The invention comprises incoming feeder, outgoing feeder, open circuit loop coupler and offset-type microstrip resonator. After connecting in series to offset-type microstrip resonator, the incoming and outgoing feeder connects to open circuit loop coupler. Base on conventional open circuit loop coupling band pass filter, the invention features an offset-type microstrip resonator connected in series between outgoing feeder and open circuit loop coupler to increase outband rejection ability of filter by forbidden band property of offset-type microstrip resonator.

Description

Technical field: [0001] The invention belongs to the technical field of microwave microstrip circuits, in particular to the design of a bandpass filter, in particular to a compensated microstrip resonator and a microstrip open loop coupled bandpass filter including harmonic suppression of the resonator . Background technique: [0002] Band-pass filter is a very important device in microwave circuits. In the case of increasingly tight spectrum resources and more and more serious electromagnetic interference, higher requirements are put forward for the performance and cost of filters. An ideal filter characteristic should be no attenuation in the passband and as large an attenuation as possible in the forbidden band. [0003] The open loop microstrip coupled bandpass filter was first proposed by Jia-Sheng Hong in 1995 and has been widely used in planar microwave circuits. This type of filter has good frequency selectivity and low insertion loss, and has a small area, which c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P7/08H01P1/205
Inventor 顾建忠孙晓玮
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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