Unlock instant, AI-driven research and patent intelligence for your innovation.

A Broadband Attenuator Based on Attenuation Compensation

A technology of attenuator and attenuation, which is applied in the direction of waveguide devices, electrical components, circuits, etc., can solve the problems of standing wave difference at the attenuator port, attenuation value slope, technical difficulty, etc., to reduce the introduction of parasitic parameters, improve The effect of attenuation flatness and process simplification

Active Publication Date: 2018-02-13
成都迈科科技有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traditional attenuators, at higher frequencies, due to the influence of the parasitic parameters of the resistor itself and the microstrip connected to the resistor, etc., the port standing wave of the attenuator will be poor, and the attenuation value will slope with frequency
The attenuation flatness refers to the flatness of the attenuation of the attenuator within a certain frequency range. It is an important parameter to measure the performance of the attenuator. Usually, the method to improve the flatness of the attenuation is to design the matching circuit, that is, to change the structure of the electrode and the resistor. This method can improve the attenuation flatness to a certain extent. For example, in 2014, the Xi’an Space Radio Technology Research Institute disclosed a MIC attenuator applied to DC to UHF in its patent document with application number 201410217006.4. The flatness of the in-band attenuation is improved by designing the ground structure as a quarter quasi-fan-shaped open-circuit microstrip line structure; at the same time, when designing an attenuator with a large attenuation value, the resistance values ​​​​of the through resistance and the ground resistance are usually different. Large, which will bring inconvenience to the design layout of the attenuator
Therefore, a single method is technically difficult and has limited effects
[0004] The method of cascading multiple attenuators to form a new attenuator has long been reported. For example, Gao Yan of Xidian University designed a variety of attenuators by cascading two attenuators, but the attenuators at all levels The attenuation and shape are exactly the same, so if you want to get an attenuator with better attenuation flatness, you must make each level of attenuator have better attenuation flatness, which increases the design difficulty of the attenuator

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Broadband Attenuator Based on Attenuation Compensation
  • A Broadband Attenuator Based on Attenuation Compensation
  • A Broadband Attenuator Based on Attenuation Compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention provides an attenuator designed by using the attenuation compensation method. Firstly, 5dB, 8dB and 13dB attenuators are designed by using a T-shaped structure, from image 3 and Figure 4 It can be seen that in the DC-20GHz frequency range, the attenuation of the 5dB attenuator gradually increases with the increase of frequency, and the attenuation of the 8dB attenuator gradually decreases with the increase of frequency. The in-band flatness slope of the two attenuators is The in-band flatness slope of the 1dB and 13dB attenuators is 2dB, and the return loss is better than -20dB. The 5dB and 8dB attenuators are cascaded to form a figure 2 The secondary 13dB attenuator shown by the figure 2 and image 3 It can be seen from the simulation results that the in-band flatness slope is 0.2dB, which is obviously better than the simulation results of a 13dB attenuator.

Embodiment 2

[0035] In this embodiment, a three-stage attenuator with an attenuation of 20 dB is designed by using the attenuation compensation method. It consists of three cascaded attenuators of 5dB, 10dB and 5dB. The structure diagram is as follows: Figure 5 shown. From Figure 6 and Figure 7 It can be seen that in the DC-20GHz frequency range, the attenuation of the 5dB attenuator gradually increases with the increase of the frequency, and the in-band flatness slope is 0.8dB; the attenuation of the 10dB attenuator gradually decreases with the increase of the frequency, and the band The in-band flatness slope is 1.5dB, the in-band flatness slope of the first-stage 20dB attenuator is 5.5dB, and the return loss is better than -20dB. The in-band flatness slope of the three-stage 20dB attenuator is 1dB, which is obviously better than that of the one-stage 20dB attenuator.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the design field of microwave components, and in particular relates to a broadband attenuator manufactured by an attenuation compensation method. The present invention uses a simple designed basic attenuator unit to design a broadband attenuator with flat attenuation and high frequency by cascading two or more attenuators with different attenuation tendencies. The structure of each stage of attenuator includes dielectric substrate, thin film resistor, matched microstrip line, and ground electrode. Wherein, the thin-film resistor includes two through resistors R1 and two grounding resistors R2, and the interconnection between the two grounding electrodes and the grounding plate on the back of the substrate is realized by wrapping the end face of the substrate to ground. Compared with the traditional thin-film attenuator, the invention greatly increases the application frequency, has excellent in-band flatness, does not need to punch holes for grounding, and has simple process.

Description

technical field [0001] The invention relates to a broadband attenuator applied to high frequency, which belongs to the field of microwave component design. Background technique [0002] The attenuator is a two-port device, and its main functions are to adjust the signal transmission power and improve impedance matching. Different systems have different requirements for the attenuation of the attenuator, as small as a few dB, as large as tens of dB, or even hundreds of dB. The development of wireless communication technology has put forward higher requirements for each component in the microwave radio frequency communication chain, and the attenuator should also be developed to a higher application frequency. [0003] Attenuators based on planar structures mainly include π-type attenuators and T-type attenuators. For traditional attenuators, at higher frequencies, due to the influence of the parasitic parameters of the resistor itself and the microstrip connected to the res...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/22
Inventor 张继华张鹏陈宏伟石玉龙
Owner 成都迈科科技有限公司