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Reconfigurable waveguide filter structure

Reconfigurable waveguide filter structure

자료유형
학위논문
개인저자
남승구, 南承球
서명 / 저자사항
Reconfigurable waveguide filter structure / Seunggoo Nam
발행사항
Seoul :   Graduate School, Korea University,   2020  
형태사항
xii, 138장 : 삽화, 도표 ; 26 cm
기타형태 저록
Reconfigurable Waveguide Filter Structure   (DCOLL211009)000000232139  
학위논문주기
학위논문(박사)-- 고려대학교 대학원: 컴퓨터·전파통신공학과, 2020. 8
학과코드
0510   6YD36   382  
일반주기
지도교수: 이주섭  
서지주기
참고문헌: 장 127-138
이용가능한 다른형태자료
PDF 파일로도 이용가능;   Requires PDF file reader(application/pdf)  
비통제주제어
Frequency tunable bandpass filter,,
000 00000nam c2200205 c 4500
001 000046048441
005 20200921091551
007 ta
008 200706s2020 ulkad bmAC 000c eng
040 ▼a 211009 ▼c 211009 ▼d 211009
085 0 ▼a 0510 ▼2 KDCP
090 ▼a 0510 ▼b 6YD36 ▼c 382
100 1 ▼a 남승구, ▼g 南承球
245 1 0 ▼a Reconfigurable waveguide filter structure / ▼d Seunggoo Nam
260 ▼a Seoul : ▼b Graduate School, Korea University, ▼c 2020
300 ▼a xii, 138장 : ▼b 삽화, 도표 ; ▼c 26 cm
500 ▼a 지도교수: 이주섭
502 1 ▼a 학위논문(박사)-- ▼b 고려대학교 대학원: ▼c 컴퓨터·전파통신공학과, ▼d 2020. 8
504 ▼a 참고문헌: 장 127-138
530 ▼a PDF 파일로도 이용가능; ▼c Requires PDF file reader(application/pdf)
653 ▼a Frequency tunable bandpass filter
776 0 ▼t Reconfigurable Waveguide Filter Structure ▼w (DCOLL211009)000000232139
900 1 0 ▼a Nam, Seung-goo, ▼e
900 1 0 ▼a 이주섭, ▼e 지도교수
900 1 0 ▼a Lee, Ju-seop, ▼e 지도교수
945 ▼a KLPA

전자정보

No. 원문명 서비스
1
Reconfigurable waveguide filter structure (32회 열람)
PDF 초록 목차

소장정보

No. 소장처 청구기호 등록번호 도서상태 반납예정일 예약 서비스
No. 1 소장처 과학도서관/학위논문서고/ 청구기호 0510 6YD36 382 등록번호 123064850 도서상태 대출가능 반납예정일 예약 서비스 B M
No. 2 소장처 과학도서관/학위논문서고/ 청구기호 0510 6YD36 382 등록번호 123064851 도서상태 대출가능 반납예정일 예약 서비스 B M

컨텐츠정보

초록

The resources of the frequency are limited, and the importance of the technology to flexibly use the frequency resources has been increasing. To use frequency resources efficiently,
there is a need for tunable RF circuits that can change operating frequency or bandwidth.
Therefore, recently, various types of tunable filters have been studied. A large portion
of conventional tunable circuits use varactor diodes, MEMS(Microelectromechanical systems) switches, or tuning plungers.
This dissertation focuses on solving various downsides (complexity, loss of varactor
diodes, the stability of tuning, etc.) that exist in conventional tunable filters. A new
approach for the bandwidth tuning that allows for using a smaller number of tunable coupling structures when compared to the traditional bandwidth tuning method is proposed.
In addition, this dissertation shows a new method for designing filters having a tunable
notches and tunable passband.
This work also presents two new approaches for tuning waveguide filters. The tuningmethods use contactless dielectric plates and tuning plungers which do not necessitate
electrical grounding. Hence. physical implementation can be significantly simplified.
It is believed that the design methods and structures for reconfigurable waveguide filters
presented in thesis make waveguide filters more practical in comparison with conventional
ones.

목차

Abstract
Contents i
List of Figures iv
List of Tables xii
1 Introduction 1
2 Pseudo-Butterworth Filter 3
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Theory and Filter Design . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2.1 Conventional Method . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2.2 Proposed Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Filter Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.4 Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.5 Application to a Higher-Order Filter . . . . . . . . . . . . . . . . . . . . . 29
i2.6 Measurement of the fourth order filter . . . . . . . . . . . . . . . . . . . . 34
2.7 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3 Reconfigurable Bandpass Filter with Resonators in Cul-De-Sacs 39
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.2 Filter Topology with Two Cul-de-sac Resonators . . . . . . . . . . . . . . 42
3.2.1 Notch in each side of the stopband . . . . . . . . . . . . . . . . . . 44
3.2.2 Notches in one side of the stopband . . . . . . . . . . . . . . . . . 48
3.3 Design and Measurement of Filter with Two Cul-de-Sac Resonators . . . 50
3.3.1 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3.3.2 Fabrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
3.3.3 Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3.4 Filter with Four Cul-De-Sac Resonators . . . . . . . . . . . . . . . . . . . 63
3.4.1 Filter Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.4.2 Filter Design, Fabrication, and Measurement . . . . . . . . . . . . 68
3.5 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
4 K-band High-Q Frequency-Tunable Circular Cavity Filter 77
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.2 Resonator Concept and Design . . . . . . . . . . . . . . . . . . . . . . . . 81
4.3 Coupling Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
4.4 Measurement and analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
4.5 Fourth-Order Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
ii4.6 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
5 Contactless Tuning Plunger and Its Application to K-Band FrequencyTunable Cavity Filter 103
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
5.2 Contactless Tuning Device . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
5.3 Filter Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
5.4 Measurement and Discussion . . . . . . . . . . . . . . . . . . . . . . . . . 122
5.5 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
6 Conclusions 126
References 127
감사의 글