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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of electromagnetic engineering and science
Journal Basic Information
Journal DOI :
The Korean Institute of Electromagnetic Engineering and Science
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Volume & Issues
Volume 15, Issue 4 - Oct 2015
Volume 15, Issue 3 - Jul 2015
Volume 15, Issue 2 - Apr 2015
Volume 15, Issue 1 - Jan 2015
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EBG Metamaterial Ground Plane for Mitigation of Multipath Signals in GNSS Antenna
Boyko, Sergey N. ; Kukharenko, Alexander S. ; Yaskin, Yury S. ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 199~205
DOI : 10.5515/JKIEES.2015.15.4.199
An electromagnetic band gap (EBG) metamaterial construction is presented. A construction of a multipath mitigating ground plane, based on the EBG metamaterial is described. A method of the ground plane application and installation, which provides the multipath mitigating without spoiling antenna element phase center stability, is suggested and explained. A designed construction of GNSS antenna module, which contains the multipath mitigating ground plane, made from the presented EBG metamaterial and installed in the described way is shown and parameters of the antenna module are provided.
Bandpass Antenna-Filter-Antenna Arrays for Millimeter-Wave Filtering Applications
Kaouach, Hamza ; Kabashi, Amar ; Simsim, Mohammed T. ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 206~212
DOI : 10.5515/JKIEES.2015.15.4.206
This paper introduces new wideband antenna-filter-antenna (AFA) uniform arrays that can be utilized as frequency selective surfaces (FSS) with low loss and sharp roll-off response, which are highly desirable characteristics for millimeter wave applications. The design adopts a simple 3-layer single polarization structure consisting of two patch antennas and a resonator. Both simulations and measurements are used to characterize the performances of the proposed design. Overall results show 18.5% 10-dB bandwidth. For the targeted band the insertion loss is less than 0.2 dB. Possible applications include quasi-optical amps, grid mixers and radomes for aircraft radar antennas.
Body-Worn Spiral Monopole Antenna for On-Body Communications
Kammersgaard, Nikolaj P.B. ; Kvist, Soren H. ; Thaysen, Jesper ; Jakobsen, Kaj B. ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 213~218
DOI : 10.5515/JKIEES.2015.15.4.213
A novel body-worn spiral monopole antenna is presented. The antenna consists of a ground plane and a spiral monopole. The antenna was designed for Ear-to-Ear (E2E) communication between In-the-Ear (ITE) hearing instruments at 2.45 GHz and has been simulated, prototyped, and measured. The antenna yielded a measured and simulated E2E path gain at 2.45 GHz of -82.1 dB and -85.9 dB, respectively. The radiation pattern of the antenna when mounted in the ear is presented and discussed.
Miniaturized Radio Frequency Choke Using Modified Stubs for High Isolation in MIMO Systems
Lim, Seonho ; Choi, Woo Cheol ; Yoon, Young Joong ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 219~223
DOI : 10.5515/JKIEES.2015.15.4.219
In this paper, a miniaturized radio frequency choke (RFC) using modified stubs is proposed to improve isolation characteristics in a multiple-input-multiple-output (MIMO) antenna system. The proposed RFC, based on the LC resonance, is designed to suppress the leakage current that leads to the degradation of antenna diversity performances in the MIMO antenna configuration. The proposed RFC is composed of two open stubs that are implemented on the top of the ground plane and miniaturized by adding a slit structure on the ground plane. The MIMO antennas are also designed to verify isolation performance in the LTE 2300 band (2,300-2,400 MHz). The MIMO antennas perform well with low reflection coefficient characteristics and high isolation characteristics in the whole LTE 2300 band. To evaluate the isolation in the MIMO system, the envelope correlation coefficient (ECC) is calculated, and the value is less than 0.08. The achieved ECC is regarded as a reasonable result for improving isolation performance in the frequency range of 2,300-2,400 MHz; also, radiation patterns of antenna elements are maintained regardless of the presence of RFC.
Comparison of Antenna Parameters of R-/S-Band Standard Gain Horn Antennas
Kang, Jin-Seob ; Kim, Jeong-Hwan ; Park, Jeong-Il ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 224~231
DOI : 10.5515/JKIEES.2015.15.4.224
A comparison of the antenna parameters for R-band (1.7-2.6 GHz) and S-band (2.6-3.95 GHz) standard gain horn antennas has been performed by the Korea Research Institute of Standards and Science (KRISS), together with seven domestic participants from private companies and public institutions. Its purpose, as a proficiency test program of the `Antenna Measurement Club` of KRISS, was to check equivalences in antenna parameter measurements between KRISS and the participants, particularly in the R-/S-band, to support antenna manufacturers and end users in Korea. The measurement parameters of this comparison are the power gain, radiation pattern, and reflection coefficient of the traveling standards for R-/S-band pyramidal standard gain horn antennas. The comparison used a gain comparison method and an extrapolation method to measure the power gain of the two traveling standards; the radiation patterns were measured in the far-field region of the transmitting and receiving antennas.
A D-Band Integrated Signal Source Based on SiGe 0.18μm BiCMOS Technology
Jung, Seungyoon ; Yun, Jongwon ; Rieh, Jae-Sung ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 232~238
DOI : 10.5515/JKIEES.2015.15.4.232
This work describes the development of a D-band (110-170 GHz) signal source based on a SiGe BiCMOS technology. This D-band signal source consists of a V-band (50-75 GHz) oscillator, a V-band amplifier, and a D-band frequency doubler. The V-band signal from the oscillator is amplified for power boost, and then the frequency is doubled for D-band signal generation. The V-band oscillator showed an output power of 2.7 dBm at 67.3 GHz. Including a buffer stage, it had a DC power consumption of 145 mW. The peak gain of the V-band amplifier was 10.9 dB, which was achieved at 64.0 GHz and consumed 110 mW of DC power. The active frequency doubler consumed 60 mW for D-band signal generation. The integrated D-band source exhibited a measured output oscillation frequency of 133.2 GHz with an output power of 3.1 dBm and a phase noise of -107.2 dBc/Hz at 10 MHz offset. The chip size is
, including RF and DC pads.
A Simple Planar Heptaband Antenna with a Coupling Feed for 4G Mobile Applications
Hong, Youngtaek ; Tak, Jinpil ; Choi, Jaehoon ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 239~244
DOI : 10.5515/JKIEES.2015.15.4.239
A simple planar heptaband antenna with a coupling feed for 4G mobile applications is proposed. This antenna consists of a folded monopole and a feed strip line on the top plane and an L-shaped line with a coupling plate on the bottom plane. The antenna provides a wide bandwidth to cover the LTE/GSM/UMTS heptaband operation. The measured 6-dB return loss bandwidth is 152 MHz (820-972 MHz) in the lowfrequency band and 1,150 MHz (1,600-2,750 MHz) in the high-frequency band. The overall dimensions of the proposed antenna are
A Low-Profile Dipole Array Antenna with Monopole-Like Radiation for On-Body Communications
Tak, Jinpil ; Choi, Jaehoon ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 245~249
DOI : 10.5515/JKIEES.2015.15.4.245
In this paper, a low-profile dipole array antenna with monopole-like radiation for on-body communications is proposed. The proposed antenna, operating in the industrial, scientific, and medical (ISM) band, is designed with consideration of the human body effect. By placing eight planar dipole antenna elements symmetrically around the z-axis, the proposed antenna achieves monopole-like radiation characteristics with a low profile. The antenna has overall dimensions of
at 2.45 GHz in the ISM 2.45 GHz band (2.4-2.485 GHz) and a 10-dB return loss bandwidth of 4.9% ranging from 2.4 to 2.52 GHz.
Experimental Measurement System for 3-6 GHz Microwave Breast Tomography
Son, Seong-Ho ; Kim, Hyuk-Je ; Lee, Kwang-Jae ; Kim, Jang-Yeol ; Lee, Joon-Moon ; Jeon, Soon-Ik ; Choi, Hyung-Do ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 250~257
DOI : 10.5515/JKIEES.2015.15.4.250
This paper presents an experimental measurement system for 3-6 GHz microwave tomography (MT) of the breast. The measurement system is constructed as a minimal test bed to verify key components such as the sensing antennas, radio frequency (RF) transceiver, sensing mechanism, and image reconstruction method for our advanced MT system detecting breast cancer at an early stage. The test bed has eight RF channels operating at 3 to 6 GHz for high spatial resolution and a two-axis scanning mechanism for three-dimensional measurement. The measurement results from the test bed are shown and discussed.
A De-Embedding Technique of a Three-Port Network with Two Ports Coupled
Pu, Bo ; Kim, Jonghyeon ; Nah, Wansoo ;
Journal of electromagnetic engineering and science, volume 15, issue 4, 2015, Pages 258~265
DOI : 10.5515/JKIEES.2015.15.4.258
A de-embedding method for multiport networks, especially for coupled odd interconnection lines, is presented in this paper. This method does not require a conversion from S-parameters to T-parameters, which is widely used in the de-embedding technique of multiport networks based on cascaded simple two-port relations, whereas here, we apply an operation to the S-matrix to generate all the uncoupled and coupled coefficients. The derivation of the method is based on the relations of incident and reflected waves between the input of the entire network and the input of the intrinsic device under test (DUT). The characteristics of the intrinsic DUT are eventually achieved and expressed as a function of the S-parameters of the whole network, which are easily obtained. The derived coefficients constitute ABCD-parameters for a convenient implementation of the method into cascaded multiport networks. A validation was performed based on a spice-like circuit simulator, and this verified the proposed method for both uncoupled and coupled cases.