Millimeter-wave Wideband Injection-Locked Frequency Dividers
밀리미터파에서의 광대역 주입 잠금 주파수 분주기
- 주제(키워드) Frequency divider , high-order transformer-based resonator , resonator superposition method (RSM) , injection-locked frequency divider (ILFD) , locking range (LR) , frequency-tracking , millimeter-wave (mm-wave)
- 발행기관 고려대학교 대학원
- 지도교수 전상근
- 발행년도 2025
- 학위수여년월 2025. 2
- 학위명 석사
- 학과 및 전공 대학원 전기전자공학과
- 세부전공 통신 및 네트워크 전공
- 원문페이지 50 p
- 실제URI http://www.dcollection.net/handler/korea/000000291214
- UCI I804:11009-000000291214
- DOI 10.23186/korea.000000291214.11009.0001891
- 본문언어 영어
초록/요약
This paper proposes a novel dual 4th-order transformer-based Injection-Locked Frequency Divider (ILFD) designed using a Resonator Superposition Method (RSM) in a 28-nm CMOS process. This ILFD focuses on achieving a wide locking range (LR) while minimizing the complexity that commonly arises in high-order transformer-based resonator designs. By employing the RSM to effectively combine multiple resonant frequencies, the ILFD expands its operational bandwidth, significantly enhancing the LR while maintaining power efficiency and design simplicity. Furthermore, to further extend the locking range, a frequency-tracking technique is implemented in the design. Measurement results from the fabricated ILFD demonstrate a wide LR spanning from 13 GHz to 52.5 GHz, corresponding to 120.6% of the center frequency. This performance is achieved with a low power consumption of only 2.0 mW from a 0.5-V supply, validating the efficiency of the design for modern mm-wave applications. In terms of performance metrics, the proposed ILFD achieves a Figure of Merit (FoM*) of 19.75 GHz/mW and a FoM** of 60.3 %/mW, demonstrating superior efficiency compared to existing mm-wave ILFDs. Additionally, phase noise measurements indicate a 6-dB phase noise difference close to the theoretical value, confirming the phase response stability of the ILFD. These results underscore that the proposed ILFD is a highly competitive solution for wideband applications in advanced communication systems where both broad LR and high power efficiency are critical. This study demonstrates the potential of the resonator superposition method as a powerful approach for expanding the operational range of ILFDs, offering a promising solution for future mm-wave and multi-standard communication systems.
more목차
ABSTRACT I
국문 초록 III
PREFACE V
TABLE OF CONTENTS VI
LIST OF TABLES VII
LIST OF FIGURES VIII
NOMENCLATURE(OR LIST OF SYMBOLS) XI
CHAPTER 1. INTRODUCTION １
CHAPTER 2. MM-WAVE ILFD 4
2.1 Conventional ILFD 4
2.2 Limitation of High-Order Transformer-Based Resonator in ILFD 7
2.3 Resonator Superposition Method (RSM) with High-Order Transformer 9
2.4 4th-Order Transformer Ripple Compensation 14
2.5 Simulation Results of Resonator using Superposition Method 20
2.6 Frequency-Tracking Technique 22
2.7 Measurement Results 25
CHAPTER 3. CONCLUSION 32
REFERENCES 34
