MIC attenuator applied to DC and ultrahigh frequency

Abstract

The invention relates to an MIC attenuator applied to DC and ultrahigh frequency. The MIC attenuator applied to DC and ultrahigh frequency is characterized by comprising a grounding structure, a film resistor network structure and characteristic impedance matching microstrip lines, the film resistor network structure comprises two direct-connection resistors R and two resistors R1to ground; the grounding structure is a quarter quasi sector open-circuit microstrip line; one ends of the two direct-connection resistors R are connected with one ends of the resistors R1 to ground to form the film resistor network structure of a criss-cross mirror structure, the other ends of the two direct-connection resistors R are connected with the impedance matching microstrip lines at the microwave signal input end and the microwave signal output end, and the other ends of the two resistors to ground are respectively connected with the grounding structure. According to the MIC attenuator for applying DC to ultrahigh frequency, broadband microwave signal energy can be evenly absorbed, the attenuation values of microwave signals of all frequencies in operation bandwidth are the same, meanwhile, any-frequency reflection signals in the bandwidth can be reduced to an extremely low level, and good matching is achieved.

Description

technical field [0001] The invention relates to a MIC (Microwave Integrated Circiut) attenuator applied to DC (low frequency) to ultra-high frequency, and belongs to the field of microwave component design. Background technique [0002] The MIC attenuator is a very flexible and effective means to adjust the microwave link gain and improve the voltage standing wave ratio of the cascade module, and is widely used in the current microwave machine design. [0003] Traditional MIC attenuators, because there is a microstrip transition line between the direct resistance and the ground resistance of the attenuator, so matching design is required, which restricts the frequency bandwidth and in-band characteristics of the attenuator. Take the 3dB attenuator as an example: Frequency range The narrow absolute bandwidth is 24GHz (4.4 to 28.8GHz), the in-band amplitude flatness is 1.15dB, and the size is 3mm×5.5mm larger. At the same time, the ground resistance of the attenuator is groun...

AI Technical Summary

Problems solved by technology

At the same time, the ground resistance of the attenuator is grounded through punching, and the punching needs to meet the design process requirements of the microwave stand-alone MIC chip and cannot be drilled nearby. The frequency characteristics become worse, and the higher the frequency and the greater the attenuation, the worse the large-frequency characteristics will affect the use of high-frequency broadband microwave stand-alone

Unable to realize the microwave bypass function in the debugging stage of the whole machine, and the flexibility is poor

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