Size-reduction and harmonic-rejection of microwave amplifiers using spiral-defected group structure

Jong Sik Lim; Yong Chae Jeong; Dal Ahn; Young Taek Lee; Hyoungrae Cho; Sangwook Nam

doi:10.1109/EUMC.2003.177755

Size-reduction and harmonic-rejection of microwave amplifiers using spiral-defected group structure

Jong Sik Lim
, Yong Chae Jeong
, Dal Ahn
, Young Taek Lee
, Hyoungrae Cho
, Sangwook Nam

Division of Electronic Engineering

Seoul National University
Soonchunhyang University

Research output: Conference(x) › Paper › peer-review

6 Scopus citations

Abstract

A new method to reduce the size of amplifiers and reject harmonics using spiral-defected ground structure (Spiral-DGS) is presented. A microstrip transmission line having Spiral-DGS provides increased slow-wave factor (SWF) and excellent rejection characteristics for a specified harmonic frequency band as if it is a band rejection filter. Due to the increased SWF, the physical lengths of matching networks are shortened while the original matching and performances are preserved. The reduced lengths by Spiral-DGS are 39% and 44% of the original lengths in input and output matching networks, respectively. It is shown that the measured S-parameters of the reduced amplifier agree well with those of the original amplifier. The measured second harmonic of the reduced amplifier is much less than that of the original amplifier by at least 10dB.

Original language	English
Pages	1421-1424
Number of pages	4
DOIs	https://doi.org/10.1109/EUMC.2003.177755
State	Published - 2003
Event	33rd European Microwave Conference, EuMC 2003 - Munich, Germany Duration: 2003.10.7 → 2003.10.7

Conference

Conference	33rd European Microwave Conference, EuMC 2003
Country/Territory	Germany
City	Munich
Period	03.10.7 → 03.10.7

Quacquarelli Symonds(QS) Subject Topics

Computer Science & Information Systems
Engineering - Electrical & Electronic
Engineering - Petroleum

Access to Document

10.1109/EUMC.2003.177755

Cite this

@conference{b28401c0469245b8a4209b049b6b2fdc,

title = "Size-reduction and harmonic-rejection of microwave amplifiers using spiral-defected group structure",

abstract = "A new method to reduce the size of amplifiers and reject harmonics using spiral-defected ground structure (Spiral-DGS) is presented. A microstrip transmission line having Spiral-DGS provides increased slow-wave factor (SWF) and excellent rejection characteristics for a specified harmonic frequency band as if it is a band rejection filter. Due to the increased SWF, the physical lengths of matching networks are shortened while the original matching and performances are preserved. The reduced lengths by Spiral-DGS are 39\% and 44\% of the original lengths in input and output matching networks, respectively. It is shown that the measured S-parameters of the reduced amplifier agree well with those of the original amplifier. The measured second harmonic of the reduced amplifier is much less than that of the original amplifier by at least 10dB.",

author = "Lim, \{Jong Sik\} and Jeong, \{Yong Chae\} and Dal Ahn and Lee, \{Young Taek\} and Hyoungrae Cho and Sangwook Nam",

year = "2003",

doi = "10.1109/EUMC.2003.177755",

language = "English",

pages = "1421--1424",

note = "33rd European Microwave Conference, EuMC 2003 ; Conference date: 07-10-2003 Through 07-10-2003",

}

TY - CONF

T1 - Size-reduction and harmonic-rejection of microwave amplifiers using spiral-defected group structure

AU - Lim, Jong Sik

AU - Jeong, Yong Chae

AU - Ahn, Dal

AU - Lee, Young Taek

AU - Cho, Hyoungrae

AU - Nam, Sangwook

PY - 2003

Y1 - 2003

N2 - A new method to reduce the size of amplifiers and reject harmonics using spiral-defected ground structure (Spiral-DGS) is presented. A microstrip transmission line having Spiral-DGS provides increased slow-wave factor (SWF) and excellent rejection characteristics for a specified harmonic frequency band as if it is a band rejection filter. Due to the increased SWF, the physical lengths of matching networks are shortened while the original matching and performances are preserved. The reduced lengths by Spiral-DGS are 39% and 44% of the original lengths in input and output matching networks, respectively. It is shown that the measured S-parameters of the reduced amplifier agree well with those of the original amplifier. The measured second harmonic of the reduced amplifier is much less than that of the original amplifier by at least 10dB.

AB - A new method to reduce the size of amplifiers and reject harmonics using spiral-defected ground structure (Spiral-DGS) is presented. A microstrip transmission line having Spiral-DGS provides increased slow-wave factor (SWF) and excellent rejection characteristics for a specified harmonic frequency band as if it is a band rejection filter. Due to the increased SWF, the physical lengths of matching networks are shortened while the original matching and performances are preserved. The reduced lengths by Spiral-DGS are 39% and 44% of the original lengths in input and output matching networks, respectively. It is shown that the measured S-parameters of the reduced amplifier agree well with those of the original amplifier. The measured second harmonic of the reduced amplifier is much less than that of the original amplifier by at least 10dB.

UR - https://www.scopus.com/pages/publications/33748772049

U2 - 10.1109/EUMC.2003.177755

DO - 10.1109/EUMC.2003.177755

M3 - Paper

AN - SCOPUS:33748772049

SP - 1421

EP - 1424

T2 - 33rd European Microwave Conference, EuMC 2003

Y2 - 7 October 2003 through 7 October 2003

ER -

Size-reduction and harmonic-rejection of microwave amplifiers using spiral-defected group structure

Abstract

Conference

Quacquarelli Symonds(QS) Subject Topics

Access to Document

Other files and links

Fingerprint

Cite this