Journal of electromagnetic engineering and science最新文献_第8页

Shielding Effectiveness of a PC Case Using Three-Axis Electro-optic Sensors 三轴电光传感器对PC机机箱屏蔽效果的影响

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-01-31 DOI: 10.26866/jees.2023.1.r.138

Hee Jung Lee, T. Kang, Jin S. Choi, Young-Pyo Hong, Woosang Lee

引用次数: 0

A Dual-Band Branch-Line Coupler with Ultra-Wideband Harmonic Suppression 一种具有超宽带谐波抑制的双频支路耦合器

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-01-31 DOI: 10.26866/jees.2023.1.r.144

Xiao-Yu Zhang, Jong‐Chul Lee

引用次数: 0

Design of Front-End Receiver and Matrix for 2–18 GHz with a Searching and Tracking Function for an ELINT System 带搜索跟踪功能的2 - 18ghz ELINT系统前端接收机和矩阵设计

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-01-31 DOI: 10.26866/jees.2023.1.r.142

Yuseok Jeon, Jaejin Koo

{"title":"Design of Front-End Receiver and Matrix for 2–18 GHz with a Searching and Tracking Function for an ELINT System","authors":"Yuseok Jeon, Jaejin Koo","doi":"10.26866/jees.2023.1.r.142","DOIUrl":"https://doi.org/10.26866/jees.2023.1.r.142","url":null,"abstract":"In this paper, we describe the design and fabrication of a front-end receiver and matrix modules for 2−18 GHz with high gain, good phase matching characteristics, and reliability; this was accomplished by applying a chip-and-wire process using a bare-type monolithic microwave integrated circuit (MMIC) device. To compensate for the mismatch among many sub-modules, a front-end module, matrix module, and built-in test module suitable for sub-band frequency characteristics were designed and applied to the direct receiver. The matrix box used a high-pass filter to remove unwanted low frequencies and a 4-way divider to distribute single input BIT signals. The broadband receiver module had two paths: a phase path and an amplitude path. Phase- and amplitude-matched radio frequency semi-rigid cables of different lengths were used to connect to the internal sub-modules of the matrix receiver. The main RF line was a dielectric substrate, RT/Duroid 5880, with a relative dielectric constant of 2.2 and a dielectric thickness of 0.127 mm. The sizes of the front-end receiver and matrix box were 137 mm × 120 mm × 31 mm and 250 mm × 238 mm × 138 mm, respectively. In the wideband frequency receiver module, the gain was 22.99 dB at mid-band (frequency 2−6 GHz) with a return loss of about 14.76 dB. Th e gain was 23.25 dB at a high band (frequency 6−18 GHz), having a return loss of about 11.63 dB. The peak values of phase matching among the channels for 2–6 GHz were ±3.30°, and the peak values of phase matching among the channels for 6–18 GHz were ±8.24°.","PeriodicalId":15662,"journal":{"name":"Journal of electromagnetic engineering and science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42952936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a UWB Antenna with Multiple Ports on a Single Circular Radiator for Direction-Finding Applications 用于测向应用的单圆形辐射器上多端口超宽带天线设计

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-01-31 DOI: 10.26866/jees.2023.1.r.145

Sangwoon Youn, B. Jang, H. Choo

引用次数: 0

A Wideband Ultra-Low-Profile Solar Cell–Integrated Antenna 宽带超低剖面太阳能电池-集成天线

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2023-01-31 DOI: 10.26866/jees.2023.1.r.143

Ahmed Ali, Heesu Wang, Yeojun Yun, Sungjun Park, Y. B. Park, Jaejin Lee, I. Park

引用次数: 0

An Efficient Cross-Correlation Method for a Digital Phase Noise Measurement System 一种有效的数字相位噪声测量系统互相关方法

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2022-11-30 DOI: 10.26866/jees.2022.6.r.136

K. Yeom, Jin-Seong Roh

{"title":"An Efficient Cross-Correlation Method for a Digital Phase Noise Measurement System","authors":"K. Yeom, Jin-Seong Roh","doi":"10.26866/jees.2022.6.r.136","DOIUrl":"https://doi.org/10.26866/jees.2022.6.r.136","url":null,"abstract":"In this paper, we propose a digital phase noise measurement using a 10-bit digital oscilloscope MXR608A from Keysight Technologies. The digital oscilloscope’s four channel data are used for digital phase noise measurement: two channels are assigned for the equally divided SUT (source under test), while the other two are assigned for the equally divided reference signals. First, we propose a cross correlation method to identify the phase noises added by the ADCs in the digital oscilloscope from the measured phase noises. Then, we propose a novel cross correlation method to extract the SUT phase noise. The cross-correlation output of the proposed method yields only the SUT phase noise and does not contain the reference signal phase noise unlike the traditional method. The proposed method was applied to measure the phase noises of the two SUTs, Keysight’s synthesized signal generator E8257D and function generator 33600A. The measured phase noises of the two SUTs were compared and found to show remarkable agreements with those measured using Keysight’s signal source analyzer E5052B. The phase noise floor of our digital phase noise measurement system is about -160 dBc/Hz.","PeriodicalId":15662,"journal":{"name":"Journal of electromagnetic engineering and science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49620516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Measurement Technique for Complex Permittivity in Millimeter-Wave Band Using Simple Rectangular Waveguide Adapters 用简单矩形波导适配器测量毫米波段复介电常数的新技术

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2022-11-30 DOI: 10.26866/jees.2022.6.r.130

Min-Seok Park, Jeahoon Cho, Soonyong Lee, Youngkun Kwon, Kyung‐Young Jung

引用次数: 0

Power Limiter with PIN Diode Embedded in Cavity to Minimize Parasitic Inductance 功率限制器与PIN二极管嵌入腔中，以尽量减少寄生电感

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2022-11-30 DOI: 10.26866/jees.2022.6.l.10

D. Jung, Kunsik Park, J. Won, Doohyung Cho, Sung-Un Kwon, H. Jang, Jong-Won Lim

引用次数: 0

A Tunable Bandpass Filter with Arbitrarily Terminated Port Impedance Using Dual-Mode Resonator 采用双模谐振器的任意端接端口阻抗可调谐带通滤波器

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2022-11-30 DOI: 10.26866/jees.2022.6.r.134

G. Chaudhary, Y. Jeong

{"title":"A Tunable Bandpass Filter with Arbitrarily Terminated Port Impedance Using Dual-Mode Resonator","authors":"G. Chaudhary, Y. Jeong","doi":"10.26866/jees.2022.6.r.134","DOIUrl":"https://doi.org/10.26866/jees.2022.6.r.134","url":null,"abstract":"This paper presents a design for a compact arbitrarily terminated port impedance tunable bandpass filter (BPF) with transmission zeros (TZs) that employs a dual-mode resonator. The proposed dual-mode resonator comprises two varactors along with series transmission lines and a shunt short-circuited stub. The resonant frequency separation of the dual-mode resonator can be adjusted by changing the length or characteristic impedance of the short-circuited stub. To achieve arbitrarily terminated port impedances, the coupling between the source/load and the dual-resonator is modified from the originally designed 50-to-50 Ω termination filter. Frequency selective characteristics are achieved by generating two TZs at the lower and upper frequencies of the passband. The location of the TZs can be changed by controlling the source-load coupling. To experimentally validate the proposed tunable BPF, three prototypes (50-to-50 Ω BPF, 25-to- 50 Ω BPF, and 20 + j10-to-50 Ω BPFs) are designed and fabricated. The measurement results revealed that the center frequency can be tuned from 2.10 GHz to 3.02 GHz (920 MHz tunability), where the insertion loss varies from 1.50 to 2.5 dB.","PeriodicalId":15662,"journal":{"name":"Journal of electromagnetic engineering and science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46313473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Millimeter-Wave GaN MMIC Front End Module with 5G NR Performance Verification 具有5G NR性能验证的毫米波GaN MMIC前端模块

IF 2.3 3区工程技术

Journal of electromagnetic engineering and science Pub Date : 2022-11-30 DOI: 10.26866/jees.2022.6.r.133

J. Hwang, Jiho Lee, Kichan Kim, Han‐Lim Lee

{"title":"A Millimeter-Wave GaN MMIC Front End Module with 5G NR Performance Verification","authors":"J. Hwang, Jiho Lee, Kichan Kim, Han‐Lim Lee","doi":"10.26866/jees.2022.6.r.133","DOIUrl":"https://doi.org/10.26866/jees.2022.6.r.133","url":null,"abstract":"This paper proposes a millimeter-wave (mmWave) 5G front end module (FEM) based on multiple gallium nitride (GaN) monolithic microwave integrated circuits (MMICs) with 5G new radio (NR) performance verification. The proposed structure is configured by a wide band GaN single-pole double-throw (SPDT) switch MMIC, a GaN low-noise amplifier (LNA) MMIC, and a GaN power amplifier (PA) MMIC with the target operation band from 26.5 GHz to 29.5 GHz. The LNA and PA MMICs are designed with 150 nm GaN/SiC technology, and the SPDT MMIC is designed with 100 nm GaN/Si. The LNA MMIC shows the measured noise figure less than or equal to 2.52 dB within the operation band. The PA MMIC is based on a two-stage configuration and shows about 35 dBm measured saturated power with power-added efficiency better than 34% within the operation band. Also, the SPDT MMIC is based on an artificial transmission line configuration for wideband performance and shows that the measured insertion loss is less than 1.6 dB, and the measured isolation is higher than 25 dB within the operation band. Furthermore, all MMICs are integrated within a single carrier as an FEM and successfully verified by 5G NR test signals.","PeriodicalId":15662,"journal":{"name":"Journal of electromagnetic engineering and science","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42940815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0