800MHz~5.8GHz 광대역 CMOS 저잡음 증폭기 설계

김혜원,탁지영,이진주,신지혜,박성민 대한전자공학회 2011 電子工學會論文誌-SD (Semiconductor and devices) Vol.48 No.12

This paper presents a wideband low-noise amplifier (LNA) covering 800MHz~5.8GHz for various wireless communication standards by utilizing in a 0.13um CMOS technology. Particularly, the LNA consists of two stages to improve the low-noise characteristics, that is, a cascode input stage and an output buffer with noise cancellation technique. Also, a feedback resistor is exploited to help achieve wideband impedance matching and wide bandwidth. Measure results demonstrate the bandwidth of 811MHz~5.8GHz, the maximum gain of 11.7dB within the bandwidth, the noise figure of 2.58~5.11dB. The chip occupies the area of 0.7×0.9mm2, including pads. DC measurements reveal the power consumption of 12mW from a single 1.2V supply. 본 논문에서는 0.13㎛ CMOS 공정을 사용하여 800MHz~5.8GHz 대역 내 다양한 무선통신 표준을 포함하는 광대역 저잡음증폭기(wideband-LNA)를 구현하였다. 저잡음 특성을 개선하기 위하여 제작한 LNA는 두 단으로 구성되었으며, 입력캐스코드단 및 잡음신호만을 상쇄시키는 출력 버퍼단으로 구성하였다. 또한, 피드백 저항을 이용함으로써, 광대역 임피던스 매칭 효과및 넓은 대역폭을 구현하였다. 측정결과, 811MHz~5.8GHz의 주파수 응답과 대역폭 내에서 최대 11.7dB의 전력이득 및 2.58~5.11dB의 잡음지수(NF)를 얻었다. 제작한 칩은 0.7×0.9mm2의 면적을 가지며 1.2V의 전원전압에서 12mW의 낮은 전력을 소모한다.

800㎒~5.8㎓ 광대역 CMOS 저잡음 증폭기 설계

김혜원,탁지영,이진주,신지혜,박성민 大韓電子工學會 2011 電子工學會論文誌-SD (Semiconductor and devices) Vol.48 No.12

본 논문에서는 0.13㎛ CMOS 공정을 사용하여 800㎒~5.8㎓ 대역 내 다양한 무선통신 표준을 포함하는 광대역 저잡음 증폭기(wideband-LNA)를 구현하였다. 저잡음 특성을 개선하기 위하여 제작한 LNA는 두 단으로 구성되었으며, 입력캐스코드단 및 잡음신호만을 상쇄시키는 출력 버퍼단으로 구성하였다. 또한, 피드백 저항을 이용함으로써, 광대역 임피던스 매칭 효과 및 넓은 대역폭을 구현하였다. 측정결과, 811㎒~5.8㎓의 주파수 응답과 대역폭 내에서 최대 11.7㏈의 전력이득 및 2.58~5.11㏈의 잡음지수(NF)를 얻었다. 제작한 칩은 0.7×0.9㎟의 면적을 가지며 1.2V의 전원전압에서 12㎽의 낮은 전력을 소모한다. This paper presents a wideband low-noise amplifier (LNA) covering 800㎒~5.8㎓ for various wireless communication standards by utilizing in a 0.13㎛ CMOS technology. Particularly, the LNA consists of two stages to improve the low-noise characteristics, that is, a cascode input stage and an output buffer with noise cancellation technique. Also, a feedback resistor is exploited to help achieve wideband impedance matching and wide bandwidth. Measure results demonstrate the bandwidth of 811㎒~5.8㎓, the maximum gain of 11.7㏈ within the bandwidth, the noise figure of 2.58~5.11㏈. The chip occupies the area of 0.7×0.9㎟, including pads. DC measurements reveal the power consumption of 12㎽ from a single 1.2V supply.

초광대역 무선 시스템 성능 분석에 관한 연구

김길겸,최석,김학선 한밭대학교 정보통신전문대학원 2003 정보통신전문대학원 논문집 Vol.1 No.1

본 논문에서는 UWB(Ultra WideBand) 시스템에 대한 성능 요구 조건을 미국연방통신위원회(FCC: Federal Communications Commission)에서 규정[1]한 주파수 대역(3.1 ~ 10.6GHz)에서 분석하였다. 실제 무선 통신 시스템의 설계를 위해서는 각 통신 시스템의 표준으로부터 시스템의 성능 요구 조건을 산출하는 것이 일반적이다. 그러나, UWB (Ulra WideBand) 시스템은 아직 표준이 정해져 있지 않다. 따라서 근거리 무선통신시스템(Indoor Communication Systems)의 분석 방법을 근간으로 하여 새로운 시스템 성능을 분석하여 각각의 시스템 파라미터를 도출하였다 아울러 국내의 법규[2]에 의한 성능을 도출하여 FCC에서 제시한 조건과의 차이를 비교하였다 The purpose of this paper is to analyze the performance requirements of wireless systems on ultra wide band, which is set by FCC(Federal Communications Commission). Normally the calculation of performance requirements is used in the standard form of each communication systems, but there is no standard in the wireless systems on Ultra WideBand. Therefore, I derive each system parameters through the analysis of new system performance on the basis of the method of Indoor Communication Systems. Additionally, I compare the conditions that are given by FCC with resolution of the performance by domestic law.

전자전에 사용되는 S-대역 스위치 필터 뱅크의 초소형화 광대역 MEMS 대역 통과 필터 구현

이승문 ( Lee Seung Moon ),전관일 ( Jeon Gwan Il ),김남석 ( Kim Nam-seog ) 한국국방기술학회 2022 한국국방기술학회 논문지 Vol.4 No.4

광대역 MEMS 대역 통과 필터는 통신, 레이더 및 기타 마이크로파 시스템에서 중요한 주파수 선택 구성 요소이며 그 성능은 전체 시스템 성능에 직접적인 영향을 미친다. 최근 방위 산업에서 중요시되고 있는 전자전용 무인 항공기에 적용 가능한 스위치 필터뱅크(Switch FIlter Bank)의 소형 및 경량화 개발이 중요하다. 이 논문은 낮은 삽입손실을 위해 고저항 실리콘 기판 기반으로 초소형 정밀 기계 기술 (Micro electromechanical Systems, MEMS) 공정으로 제작된 고성능 광대역 대역 통과 필터를 소개한다. 필터의 중심주파수는 4GHz이며, 비대역폭은 100%를 갖도록 인터 디지털 구조로 설계되었다. 제작된 필터는 6.95mm×4.7mm×0.42mm의 체적을 가지며, 측정된 전기적 특성은 삽입손실 4.0dB, 1.0GHz 및 7.5GHz에서 감쇠량 30dB 이상, 반사 손실 10dB 이하이다. Wideband MEMS bandpass filters are important frequency-selective components in communications, radar and other microwave systems, and their performances affect overall system performances directly. Thus, it is critical to develop a compact and lightweight switch filter banks that can be applied to an unmanned aerial vehicle for electronic warfare, which is recently considered important in the defense industry. This paper introduces a high-performance wideband band pass filter fabricated by micro electromechanical systems (MEMS) process based on a high-resistance silicon substrate for low insertion loss. The center frequency of the filter is 4GHz, and it is designed in an inter-digital structure to have a fractional bandwidth of 100%. The fabricated filter has a volume of 6.95 mm × 4.7 mm × 0.42 mm and achieves an insertion loss of 4.0 dB, an attenuation of > 25 dB at 1.0 GHz and 7.5 GHz, and a return loss of < 10 dB.

광대역 기동표적 대응 IMM 필터뱅크

이정철(Jeong Cheor Lee),유창호(Chang Ho Yu),최재원(Jae Weon Choi) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.8

This paper deals with a filterbank based on the IMM (Interacting Multiple Model) that combines data from a sensor and uses them selectively depending on a level of maneuver. Furthermore, within the maneuver interval, the existing IMM filter has disadvantages such as unnecessary target estimation errors caused by using a constant velocity model and an increase of computation load because of a fixed structure. On the other hand, the proposed IMM filterbank overcomes these disadvantages by using three model groups and designs a filterbank to cope with a wideband-maneuvering target. The performances of the IMM filterbank was evaluated through comparison with the existing IMM via computer simulations. The results show good performances for a wideband-maneuvering target.

Taylor 가중치와 LSMI 알고리즘을 이용한 광대역 적응형 빔형성 연구

오관진(Kwan-Jin Oh),이희영(Hee-Young Lee),김선주(Seon-Joo Kim),정용식(Young-Seek Chung),천창율(Changyul Cheon) 대한전기학회 2013 전기학회논문지 Vol.62 No.3

This paper represents an adaptive beamforming technique to suppress interference or jamming signals in wideband. In order to maintain low side lobe level(SLL) at an antenna element level, Taylor-weighting was used. Also, to make a nulling beam pattern toward jammer’s directions in wideband, we used the modified Loaded Sample Matrix Inversion(LSMI) algorithm and Tapped Delay Line(TDL). To verify the proposed algorithm, we applied it to a rectangular array antenna. Finally, the results show beam pattern with low SLL and jammers suppression.

전송기준신호의 평균을 이용한 차등 UWB 시스템의 성능개선

황준혁,김석찬,정기웅,강봉순 에스케이텔레콤 (주) 2010 Telecommunications Review Vol.20 No.3

본 논문은 UWB-TR(Ultra WideBand-Transmitted Reference) 시스템에서 효과적으로 비트오류확률(BER:Bit Error Rate)을 개선하는 방법에 대해서 제안하였다. 제안하는 DATR(Differential Averaged TR) 시스템은 기존의 ATR(Averaged TR) 시스템과 DTR(Differential TR) 시스템의 장점을 결합하여 이전에 전송한 데이터신호를심볼 단위로 평균하여 차등기법을 적용함으로서 상관기의 기준신호를 개선하여 BER을 향상시키고 전송신호에 기준신호를 전송하지 않음으로서 데이터 전송률을 향상시킬 수 있었다. 이론적인 성능 분석과 모의실험을 통하여 제안하는 시스템이 기존의 UWB-DTR 시스템에 비해서 BER이 향상됨을 보인다.

광대역 자율 음향 시스템의 국내 최초 활용 시도와 광대역 음향 데이터 분석 방안

강명희,조윤형,나형술,손우주,윤혜주,Aldwin Adrianus,안영수 한국수산해양기술학회(구 한국어업기술학회) 2022 수산해양기술연구 Vol.58 No.2

Recently, wideband acoustic technology has been introduced and started to be used in fisheries acoustic surveys in various waters worldwide. Wideband acoustic data provides high vertical resolution, high signal-to-noise ratio and continuous frequency characteristics over a wide frequency range for species identification. In this study, the main characteristics of wideband acoustic systems were elaborated, and a general methodology for wideband acoustic data analysis was presented using data collected in frequency modulation mode for the first time in Republic of Korea. In particular, this study described the data recording method using the mission planner of the wideband autonomous acoustic system, wideband acoustic data signal processing, calibration and the wideband frequency response graph. Since wideband acoustic systems are currently installed on many training and research vessels, it is expected that the results of this study can be used as basic knowledge for fisheries acoustic research using the state-of-the-art system.

Wideband RF Interference Reduction Module

Sanggee Kang,Heonjin Hong,Youngjun Chong 한국인터넷방송통신학회 2022 Journal of Advanced Smart Convergence Vol.11 No.3

Interference always exists between wireless communication systems used in the same frequency band or adjacent frequency bands. In order to deploy a new wireless communication system such as a 5G system, a new frequency band must be allocated to the system. For this purpose, after analyzing interference between the existing system and the new system, a method of setting a frequency guard band or a minimum separation distance has been used as a passive method to limit the interference effect. This paper presents a wideband RF IRM(Interference Reduction Module) that can actively reduce the influence of interference between wireless communication systems. The wideband RF IRM can reduce the interference effects of 5G signals on satellite signals. The principle and structure of the wideband RF IRM are presented. The wideband RF IRM can suppress approximately 20dB of interference signal in 100MHz bandwidth when only interference signal exists. It also shows that when a 5G interference signal of -45dBm/100MHz and a satellite signal of -55dBm/40MHz exist simultaneously at a center frequency of 3.83GHz, about 15dB of 5G interference signal can be reduced in the frequency range covered by the satellite signal. The experimental results demonstrate that the wideband RF IRM can actively reduce the 5G interference signal on the satellite signal and can be used for the purpose of reducing the interference effect in a similar environment.

A Case Study Research on Software Cost Estimation Using Experts’ Estimates, Wideband Delphi, and Planning Poker Technique

Taghi Javdani Gandomani,Koh Tieng Wei,Abdulelah Khaled Binhamid 보안공학연구지원센터 2014 International Journal of Software Engineering and Vol.8 No.11

This Article shows a Case Study research that is performed to compare effectiveness of the Planning Poker and Wideband Delphi in two case studies. Although, Wide Band Delphi has been proposed many years ago and has enough supports in both industry and academic area but, Planning Poker is somewhat new. The study showed that applying these techniques in two companies which were using expert’s view for software cost estimation, increased the accuracy of cost estimation. Also, the results showed that Planning Poker led to better accuracy comparing to Wideband Delphi. However, this accuracy is not too much than Wideband Delphi, it was important that Planning Poker led to reducing financial risks of the projects comparing to Wideband Delphi. The study also showed that both Wideband Delphi and Planning Poker reduced the underestimates significantly.