highly selective differential mode wideband bandpass filter for uwb application n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Highly Selective Differential-Mode Wideband Bandpass Filter for UWB Application PowerPoint Presentation
Download Presentation
Highly Selective Differential-Mode Wideband Bandpass Filter for UWB Application

Loading in 2 Seconds...

play fullscreen
1 / 11

Highly Selective Differential-Mode Wideband Bandpass Filter for UWB Application - PowerPoint PPT Presentation


  • 101 Views
  • Uploaded on

Highly Selective Differential-Mode Wideband Bandpass Filter for UWB Application. 趙士傑 2011/9/8. Ref: T. B. Lim and L. Zhu, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS , vol. 21, no. 3, pp. 133-135, 2011. Introduction.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Highly Selective Differential-Mode Wideband Bandpass Filter for UWB Application' - blake-greer


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
highly selective differential mode wideband bandpass filter for uwb application

Highly Selective Differential-Mode Wideband BandpassFilter for UWB Application

趙士傑

2011/9/8

Ref: T. B. Lim and L. Zhu, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS,

vol. 21, no. 3, pp. 133-135, 2011

introduction
Introduction

FCC authorizes the unlicensed use of UWB in the range of 3.1 to 10.6 GHz

As a key component to regulate the specified UWB spectrum, the bandpassfilters with high performance, compact size and low cost are highly demanded

Little research has been done on exploration of a wideband differential-mode BPF to meet the prompt needs in development of such a balanced RF front-end

introduction cont
Introduction (cont.)
  • The broadside coupled coplanar striplines
    • differential-mode BPF with a fractional bandwidth greater than 110%
    • in the absence of the ground plane, this filter cannot directly integrate with other differential-mode active circuits
  • Microstrip line
    • poor frequency selectivity
simulated frequency response
Simulated frequency response

f0=4.1GHz

Z1=Z3=54.3Ω

Z2=52.8Ω

Z12=Z23=52.4 Ω

proposed differential mode bpf
Proposed differential-mode BPF

To sharpen the out-of-band rejection skirt, the first and third shunt stubs are then stretched by three times

simulated frequency responses
Simulated frequency responses

With λg/2 connecting lines

Common-mode frequency responses

conclusion
Conclusion

A novel differential-mode BPF with good common-mode suppression is proposed and designed on microstrip line

The differential-mode filter is constituted by installing two3λg/4vertical arms on the two sides and one λg/4 vertical arms in a branch-line structure

The proposed filter exhibits a wide passband in the lower UWB band

As the connecting lines are stretched from λg/4 to λg/2 in filter, a five-pole filter is realized with good out-of-band rejection skirt and good in-band common-mode suppression

Measured results achieve a differential-mode passband in the range of 2.8–5.3 GHz where the common-mode attenuation is close to 20.0 dB