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(A) study on miniaturization and broadband techniques of microstrip antennas

(A) study on miniaturization and broadband techniques of microstrip antennas

Material type
학위논문
Personal Author
이민재 李民宰
Title Statement
(A) study on miniaturization and broadband techniques of microstrip antennas / Min-jae Lee
Publication, Distribution, etc
Seoul :   Graduate School, Korea University,   2017  
Physical Medium
x, 87장 : 삽화, 도표 ; 26 cm
기타형태 저록
A study on miniaturization and broadband techniques of microstrip antennas   (DCOLL211009)000000072007  
학위논문주기
학위논문(박사)-- 고려대학교 대학원: 컴퓨터·전파통신공학과, 2017. 2
학과코드
0510   6YD36   315  
General Note
지도교수: 金英植  
Bibliography, Etc. Note
참고문헌: 장 79-87
이용가능한 다른형태자료
PDF 파일로도 이용가능;   Requires PDF file reader(application/pdf)  
비통제주제어
microstrip antenna , small & broadband antenna , reconfigurable antenna,,
000 00000nam c2200205 c 4500
001 000045897592
005 20170329115050
007 ta
008 161229s2017 ulkad bmAC 000c eng
040 ▼a 211009 ▼c 211009 ▼d 211009
085 0 ▼a 0510 ▼2 KDCP
090 ▼a 0510 ▼b 6YD36 ▼c 315
100 1 ▼a 이민재 ▼g 李民宰
245 1 1 ▼a (A) study on miniaturization and broadband techniques of microstrip antennas / ▼d Min-jae Lee
260 ▼a Seoul : ▼b Graduate School, Korea University, ▼c 2017
300 ▼a x, 87장 : ▼b 삽화, 도표 ; ▼c 26 cm
500 ▼a 지도교수: 金英植
502 1 ▼a 학위논문(박사)-- ▼b 고려대학교 대학원: ▼c 컴퓨터·전파통신공학과, ▼d 2017. 2
504 ▼a 참고문헌: 장 79-87
530 ▼a PDF 파일로도 이용가능; ▼c Requires PDF file reader(application/pdf)
653 ▼a microstrip antenna ▼a small & broadband antenna ▼a reconfigurable antenna
776 0 ▼t A study on miniaturization and broadband techniques of microstrip antennas ▼w (DCOLL211009)000000072007
900 1 0 ▼a Lee, Min-jae, ▼e
900 1 0 ▼a 김영식 ▼g 金英植, ▼e 지도교수
900 1 0 ▼a Kim, Young-sik, ▼e 지도교수
945 ▼a KLPA

Electronic Information

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(A) study on miniaturization and broadband techniques of microstrip antennas (28회 열람)
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Holdings Information

No. Location Call Number Accession No. Availability Due Date Make a Reservation Service
No. 1 Location Science & Engineering Library/Stacks(Thesis)/ Call Number 0510 6YD36 315 Accession No. 123055695 Availability Available Due Date Make a Reservation Service B M

Contents information

Abstract

In this dissertation, various techniques for small and broadband antennas have been proposed. To implement the small and broadband antennas, the composite right/left handed (CRLH) transmission line theory, planar inverted F antenna (PIFA), lumped capacitor, and varactor diodes are utilized. All designed antennas have utilized the various capacitors and can be applied for mobile applications except for the CRLH resonant antenna.
A new size reduced CRLH resonant antenna consists of the mushroom type resonators, interdigital capacitors, and defected ground structures (DGSs). The proposed antenna has the left-handed (LH), zeroth-order (ZOR), and right-handed (RH) resonant modes due to the two cells mushroom type resonator. Especially, LH resonant mode is the lowest resonance and depends on a series capacitance occurred by interdigital capacitors. The capacitance of interdigital capacitors can be increased by tight coupling made by the DGS placed on the ground plane. As a result, the LH resonant mode is moved to the lower frequency.
In spite of the merit of a small size, applications of a CRLH transmission line antenna is limited because of the narrow bandwidth. A compact dual-band antenna with a lumped capacitor for wireless local area network (WLAN) applications is designed to secure a wide band. The loop strip with a lumped capacitor of a top plane generates resonances of 2.4 GHz band and 5 GHz band is caused by a folded monopole resonance which is made by top and bottom stripline. The equivalent circuit and electric fields are simulated. An antenna size is only 5 × 9 mm2. To consider a practical circumstance, the experiments about the effect of LCD and the ground size have been conducted. 
The frequency reconfigurable antenna is very helpful to obtain the broadband characteristic. The proposed model is utilized by controlling the capacitance of the varactor diodes on a dual-band PIFA. The capacitance of the varactor diode is varied by the applied voltage. As changing the capacitance, the frequency is changed by 665 ~ 965 MHz and 1343 ~ 2181 MHz. Therefore, it covers the long term evolution (LTE), code division multiple access (CDMA), global system for mobile communications (GSM), distributed control system (DSC), personal communications service (PCS), and wideband code division multiple access (WCDMA) bands. In addition, the PIFA size is only 35 × 11 mm2.

Table of Contents

ACKNOWLEDGMENT 	i
ABSTRACT	iii
CONTENTS	v
LIST OF FIGURES 	vii
LIST OF TABLES 	x
Chapter 1. Introduction 	1
Chapter 2. Size Reduced Composite Right / Left Handed (CRLH) Resonant Antenna Based on Interdigital Capacitor with Defected Ground Structure (DGS) 	4
2.1 Introduction 	4
2.2 Theory of CRLH- TL, Interdigital Capacitor, and DGS 	6
2.2.1 CRLH-TL 	6
2.2.2 Interdigital Capacitor and DGS 	10
2.3 Antenna Design and Analysis 	12
2.4 Experimental Results and Discussion 	18
Chapter 3. Compact Dual-Band Antenna with a Lumped Capacitor for Wireless Local Area Network (WLAN) Applications 	23
3.1 Introduction 	23
3.2 Antenna Design and Analysis 	25
3.3 Experimental Results 	38
3.3.1 Fundamental Performance of Proposed Antenna 	38
3.3.2 Effect of Variation Conditions 	44
3.4 Summary 	52
Chapter 4. Frequency Reconfigurable Planar Inverted F Antenna (PIFA) for Cell-Phone Applications 	53
4.1 Introduction 	53
4.2 Antenna Design and Analysis 	56
4.2.1 Configuration and Parametric Studies 	56
4.2.2 Analysis of Varactor Diode 	62
4.3 Experimental Results 	65
4.4 Summary 	76
Chapter 5. Conclusion 	77
References 	79

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