Balanced UWB BPF with wideband common-mode suppression

Ching Her Lee, Chung I.G. Hsu, Hong Siang Yu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this letter, a new balanced ultrawideband (UWB) bandpass filter (BPF) is proposed and designed using a slotline resonator (SLR) with radial end-sections for better wideband response. The SLR is fed by microstrip lines, and the whole BPF circuit is deployed symmetrically across the plane of symmetry to provide balanced operation. When the BPF is excited differentially, the SLR half circuit behaves as a similar resonator of half width, and by locating its first three resonant modes in the passband, the desired UWB response can be achieved. Conversely, while the BPF is in common-mode (CM) operation, the symmetry plane is virtually open-circuited, and the SLR is incomplete in structure, rendering CM signal suppression very effective. In this design, bandstop filters are embedded in the feeding lines to increase the upper stopband bandwidth. The achieved performances for this proposed balanced UWB BPF are a 3-dB fractional bandwidth of 114% and a minimum measured (simulated) in-band insertion loss of 1.17 (0.92) dB for differential-mode operation and very good CM rejection with an insertion loss of larger than 25 dB over 1-20 GHz frequency range.

Original languageEnglish
Pages (from-to)2461-2464
Number of pages4
JournalMicrowave and Optical Technology Letters
Volume57
Issue number10
DOIs
Publication statusPublished - 2015 Oct 1

Fingerprint

Bandpass filters
bandpass filters
Ultra-wideband (UWB)
Resonators
resonators
retarding
broadband
Insertion losses
insertion loss
bandstop filters
bandwidth
Bandwidth
Notch filters
Networks (circuits)
Microstrip lines
symmetry
rejection
frequency ranges

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Lee, Ching Her ; Hsu, Chung I.G. ; Yu, Hong Siang. / Balanced UWB BPF with wideband common-mode suppression. In: Microwave and Optical Technology Letters. 2015 ; Vol. 57, No. 10. pp. 2461-2464.
@article{b60504b6b4ec4cde84cf5973ba99ca03,
title = "Balanced UWB BPF with wideband common-mode suppression",
abstract = "In this letter, a new balanced ultrawideband (UWB) bandpass filter (BPF) is proposed and designed using a slotline resonator (SLR) with radial end-sections for better wideband response. The SLR is fed by microstrip lines, and the whole BPF circuit is deployed symmetrically across the plane of symmetry to provide balanced operation. When the BPF is excited differentially, the SLR half circuit behaves as a similar resonator of half width, and by locating its first three resonant modes in the passband, the desired UWB response can be achieved. Conversely, while the BPF is in common-mode (CM) operation, the symmetry plane is virtually open-circuited, and the SLR is incomplete in structure, rendering CM signal suppression very effective. In this design, bandstop filters are embedded in the feeding lines to increase the upper stopband bandwidth. The achieved performances for this proposed balanced UWB BPF are a 3-dB fractional bandwidth of 114{\%} and a minimum measured (simulated) in-band insertion loss of 1.17 (0.92) dB for differential-mode operation and very good CM rejection with an insertion loss of larger than 25 dB over 1-20 GHz frequency range.",
author = "Lee, {Ching Her} and Hsu, {Chung I.G.} and Yu, {Hong Siang}",
year = "2015",
month = "10",
day = "1",
doi = "10.1002/mop.29345",
language = "English",
volume = "57",
pages = "2461--2464",
journal = "Microwave and Optical Technology Letters",
issn = "0895-2477",
publisher = "John Wiley and Sons Inc.",
number = "10",

}

Balanced UWB BPF with wideband common-mode suppression. / Lee, Ching Her; Hsu, Chung I.G.; Yu, Hong Siang.

In: Microwave and Optical Technology Letters, Vol. 57, No. 10, 01.10.2015, p. 2461-2464.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Balanced UWB BPF with wideband common-mode suppression

AU - Lee, Ching Her

AU - Hsu, Chung I.G.

AU - Yu, Hong Siang

PY - 2015/10/1

Y1 - 2015/10/1

N2 - In this letter, a new balanced ultrawideband (UWB) bandpass filter (BPF) is proposed and designed using a slotline resonator (SLR) with radial end-sections for better wideband response. The SLR is fed by microstrip lines, and the whole BPF circuit is deployed symmetrically across the plane of symmetry to provide balanced operation. When the BPF is excited differentially, the SLR half circuit behaves as a similar resonator of half width, and by locating its first three resonant modes in the passband, the desired UWB response can be achieved. Conversely, while the BPF is in common-mode (CM) operation, the symmetry plane is virtually open-circuited, and the SLR is incomplete in structure, rendering CM signal suppression very effective. In this design, bandstop filters are embedded in the feeding lines to increase the upper stopband bandwidth. The achieved performances for this proposed balanced UWB BPF are a 3-dB fractional bandwidth of 114% and a minimum measured (simulated) in-band insertion loss of 1.17 (0.92) dB for differential-mode operation and very good CM rejection with an insertion loss of larger than 25 dB over 1-20 GHz frequency range.

AB - In this letter, a new balanced ultrawideband (UWB) bandpass filter (BPF) is proposed and designed using a slotline resonator (SLR) with radial end-sections for better wideband response. The SLR is fed by microstrip lines, and the whole BPF circuit is deployed symmetrically across the plane of symmetry to provide balanced operation. When the BPF is excited differentially, the SLR half circuit behaves as a similar resonator of half width, and by locating its first three resonant modes in the passband, the desired UWB response can be achieved. Conversely, while the BPF is in common-mode (CM) operation, the symmetry plane is virtually open-circuited, and the SLR is incomplete in structure, rendering CM signal suppression very effective. In this design, bandstop filters are embedded in the feeding lines to increase the upper stopband bandwidth. The achieved performances for this proposed balanced UWB BPF are a 3-dB fractional bandwidth of 114% and a minimum measured (simulated) in-band insertion loss of 1.17 (0.92) dB for differential-mode operation and very good CM rejection with an insertion loss of larger than 25 dB over 1-20 GHz frequency range.

UR - http://www.scopus.com/inward/record.url?scp=84938096338&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84938096338&partnerID=8YFLogxK

U2 - 10.1002/mop.29345

DO - 10.1002/mop.29345

M3 - Article

AN - SCOPUS:84938096338

VL - 57

SP - 2461

EP - 2464

JO - Microwave and Optical Technology Letters

JF - Microwave and Optical Technology Letters

SN - 0895-2477

IS - 10

ER -