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Tunable and multifunctional microwave filters

Tunable and multifunctional microwave filters

Material type
학위논문
Personal Author
이보영 李輔寧
Title Statement
Tunable and multifunctional microwave filters / Boyoung Lee
Publication, Distribution, etc
Seoul :   Graduate School, Korea University,   2019  
Physical Medium
xvii, 167장 : 삽화, 도표 ; 26 cm
기타형태 저록
Tunable and Multifunctional Microwave Filters   (DCOLL211009)000000084423  
학위논문주기
학위논문(박사)-- 고려대학교 대학원: 컴퓨터·전파통신공학과, 2019. 8
학과코드
0510   6YD36   360  
General Note
지도교수: 이주섭  
Bibliography, Etc. Note
참고문헌: 154-167
이용가능한 다른형태자료
PDF 파일로도 이용가능;   Requires PDF file reader(application/pdf)  
비통제주제어
microwave filter , tunable-filter , multifunctional-filter , filtering power divider,,
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001 000045999328
005 20191017123426
007 ta
008 190625s2019 ulkad bmAC 000c eng
040 ▼a 211009 ▼c 211009 ▼d 211009
085 0 ▼a 0510 ▼2 KDCP
090 ▼a 0510 ▼b 6YD36 ▼c 360
100 1 ▼a 이보영 ▼g 李輔寧
245 1 0 ▼a Tunable and multifunctional microwave filters / ▼d Boyoung Lee
260 ▼a Seoul : ▼b Graduate School, Korea University, ▼c 2019
300 ▼a xvii, 167장 : ▼b 삽화, 도표 ; ▼c 26 cm
500 ▼a 지도교수: 이주섭
502 1 ▼a 학위논문(박사)-- ▼b 고려대학교 대학원: ▼c 컴퓨터·전파통신공학과, ▼d 2019. 8
504 ▼a 참고문헌: 154-167
530 ▼a PDF 파일로도 이용가능; ▼c Requires PDF file reader(application/pdf)
653 ▼a microwave filter ▼a tunable-filter ▼a multifunctional-filter ▼a filtering power divider
776 0 ▼t Tunable and Multifunctional Microwave Filters ▼w (DCOLL211009)000000084423
900 1 0 ▼a Lee, Bo-young, ▼e
900 1 0 ▼a 이주섭 ▼g 李周燮, ▼e 지도교수
900 1 0 ▼a Lee, Ju-seop, ▼e 지도교수
945 ▼a KLPA

Electronic Information

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Tunable and multifunctional microwave filters (41회 열람)
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No. 1 Location Science & Engineering Library/Stacks(Thesis)/ Call Number 0510 6YD36 360 Accession No. 123062311 Availability Available Due Date Make a Reservation Service B M
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No. 3 Location Sejong Academic Information Center/Thesis(5F)/ Call Number 0510 6YD36 360 Accession No. 153083036 Availability Available Due Date Make a Reservation Service M
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 360 Accession No. 123062311 Availability Available Due Date Make a Reservation Service B M
No. 2 Location Science & Engineering Library/Stacks(Thesis)/ Call Number 0510 6YD36 360 Accession No. 123062312 Availability Available Due Date Make a Reservation Service B M
No. Location Call Number Accession No. Availability Due Date Make a Reservation Service
No. 1 Location Sejong Academic Information Center/Thesis(5F)/ Call Number 0510 6YD36 360 Accession No. 153083036 Availability Available Due Date Make a Reservation Service M

Contents information

Abstract

This work presents design methods for tunable microwave filters. Conventional tunable filters have made a significant impact on implementing flexible wireless communications systems. However, in general, the frequency tuning range of conventional frequency-tunable filters is not large enough to be used in wireless systems using two non-contiguous frequency bands. In addition, conventional bandwidth-tunable filters have been designed in a way that all coupling structures are tunable ones necessitating laborious filter tuning. To address the downsides of the conventional tunable filters, the design methods for band-switchable filters and bandwidth-tunable filters are introduced in this thesis. As the band-switchable filters can produce a passband in non-contiguous bands, they can replace filter banks in wireless systems using two non-contiguous  frequency bands. The presented design method for bandwidth-tunable filters allows us to have a reduced number of tunable coupling structures. Hence, bandwidth tuning can be carried out in a more efficient manner.

This work also presents design methods for multifunctional microwave filters. As a circuit having a filtering response can have a smaller size in comparison with the one accompanied by a filter, designing multifunctional filters have been of a great interest. However, conventional design approaches rely heavily on cut-and-try and heuristic methods implying that time-consuming parametric studies must be carried out. In this thesis, analytic design approaches for filtering power dividers are presented so that rigorous circuit design can be carried out in a way to produce predefined filtering responses.

Table of Contents

1 Introduction 1
2 Tunable Filter 5
 2.1 Concept of Band-Switchable Filter 5
  2.1.1 Introduction 5
  2.1.2 Resonator Structure 8
   2.1.2.1 Conventional resonator structure 8
   2.1.2.2 Proposed resonator structure 10
  2.1.3 Design 13
   2.1.3.1 Coupling matrix 13
   2.1.3.2 External coupling structure 14
   2.1.3.3 Interresonator coupling structure 16
   2.1.3.4 Filter design 18
  2.1.4 Fabrication and Measurement 20
  2.1.5 Conclusion 24
 2.2 Extension of Band-Switchable Filter 25
  2.2.1 Introduction 25
  2.2.2 Resonator Structure 26
   2.2.2.1 Proposed resonator 26
   2.2.2.2 Operating principle of the proposed resonator 28
  2.2.3 Filter design 35
   2.2.3.1 Coupling matrix 36
   2.2.3.2 Interresonator coupling structure 37
   2.2.3.3 External coupling structure 39
  2.2.4 Fabrication and Measurement 42
  2.2.5 Conclusion 52
 2.3 Bandwidth-Tunable Waveguide Filter With Efficient Bandwidth 53
Tuning Method 53
  2.3.1 Introduction 53
  2.3.2 Bandwidth Tuning Method 55
   2.3.2.1 Conventional bandwidth tuning method 55
   2.3.2.2 Proposed bandwidth tuning method 58
  2.3.3 Higher-Order Bandwidth Tuning Methods 65
  2.3.4 Filter Design 69
   2.3.4.1 External coupling structure 70
   2.3.4.2 Interresonator coupling structure 71
  2.3.5 Measurement 73
  2.3.6 Conclusion 78
3 Multifunctional Filter 79
 3.1 Filtering Power Divider Topology with Ultra Wide-band Isolation 79
  3.1.1 Introduction 79
  3.1.2 Design Theory and Equations 84
   3.1.2.1 S11 85
   3.1.2.2 S23 85
   3.1.2.3 S12 and S22 89
   3.1.2.4 Synthesis 93
   3.1.2.5 Higher-order circuit design 97
  3.1.3 Design 102
  3.1.4 Measurement 106
  3.1.5 Application 108
  3.1.6 Conclusion 117
 3.2 Filtering Power Divider Topology with Reflectionless Response 118
  3.2.1 Introduction 118
  3.2.2 Circuit Diagram and Design Theory 119
   3.2.2.1 S11 120
   3.2.2.2 S23 122
   3.2.2.3 S12 and S22 125
   3.2.2.4 Synthesis 131
   3.2.2.5 Higher-order circuit design 133
  3.2.3 Verification 142
  3.2.4 Discussions and Future Works 147
  3.2.5 Conclusion 150
4 Conclusions 151
References 153