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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of Korean Institute of Electromagnetic Engineering and Science
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Journal DOI :
The Korean Institute of Electromagnetic Engineering and Science
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Volume & Issues
Volume 21, Issue 12 - Dec 2010
Volume 21, Issue 11 - Nov 2010
Volume 21, Issue 10 - Oct 2010
Volume 21, Issue 9 - Sep 2010
Volume 21, Issue 8 - Aug 2010
Volume 21, Issue 7 - Jul 2010
Volume 21, Issue 6 - Jun 2010
Volume 21, Issue 5 - May 2010
Volume 21, Issue 4 - Apr 2010
Volume 21, Issue 3 - Mar 2010
Volume 21, Issue 2 - Feb 2010
Volume 21, Issue 1 - Jan 2010
Selecting the target year
Design and Fabrication of 10 GHz Substrate Integrated Waveguide Band Pass Filter Based on EM Simulation
Lee, Won-Hee ; Oh, Hyun-Seok ; Jeong, Hae-Chang ; Yeom, Kyung-Whan ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 99~109
DOI : 10.5515/KJKIEES.2010.21.2.099
Recently, SIW(Substrate Integrated Waveguide) is intensively studied because of its high Q and easy integration with other devices. However, lacks of analytic characterization of SIW makes it difficult an accurate design of a SIW filter along the conventional filter design method. In this paper, two kinds of a three-stage 10 GHz SIW bandpass filter of fractional bandwidth 10% are designed using 3D EM simulator HFSS based on the recently presented EM filter design method. Two types of a modified CPW to SIW transition is proposed and employed as a SIW to microstrip transition necessary for measurement. The transitions provide an easy measurement with commercial test fixture by TRL calibration. The two proposed transitions are included in the SIW filters. The fabricated filters shows the center frequency of 10 GHz, fractional bandwidth 10%, a return loss of about 12 dB, and insertion loss of about 0.8 dB.
Tunable SIW Using Dielectric Screw for Eliminating the Phase Imbalance of Large Size Substrate Integrated Power Distribution Network
Byun, Jin-Do ; Lee, Hai-Young ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 110~120
DOI : 10.5515/KJKIEES.2010.21.2.110
In this paper, we propose a tunable SIW(Substrate Integrated Waveguide) using dielectric screws for eliminating the phase imbalance of large size power distribution networks(PDN). Alumina screws partially inserted into several through holes of the tunable SIW section effectively change the phase shift without S-parameter degradation.
measured phase imbalance of a large conventional 9 GHz SIW-PDN of
size has been greatly reduced to
. We expect that the proposed tunable SIW plays an important role for a light-weight, high performance substrate integrated phased array system(Si-PAS) and large size SIW circuit applications.
Design of High-Power and High-Efficiency Broadband Amplifier Using 1:4 Transmission Line Transformer
Kim, Kyung-Won ; Seo, Min-Cheol ; Cho, Jae-Yong ; Yoo, Sung-Cheol ; Kim, Min-Su ; Kim, Hyung-Cheol ; Oh, Jun-Hee ; Sim, Jae-Woo ; Yang, Youn-Goo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 121~128
DOI : 10.5515/KJKIEES.2010.21.2.121
This paper presents a design of a 100 W high-efficiency power amplifier, whose operational frequency band expands from 30 to 512 MHz, using negative feedback network, push-pull structure, broadband RF choke, and transmission line transformer for balun configuration. The push-pull amplifier has been tuned for higher output power using a shunt capacitor as a matching component at its load especially for high-frequency region. The implemented power amplifier exhibited a very flat power gain of
throughout the operating frequency band and very high power-added efficiency(PAE) of greater than 40% at an output power of 100 W. It also showed second- and third-harmonic distortion levels of below -34 dBc and -12 dBc, respectively, through the entire operating frequency band.
Design of K-Band CMOS Four-Port Direct Conversion Receiver for BPSK Demodulation
Moon, Seong-Mo ; Park, Dong-Hoon ; Yu, Jong-Won ; Lee, Moon-Que ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 129~135
DOI : 10.5515/KJKIEES.2010.21.2.129
In this paper, we propose and demonstrate a new four-port BPSK direct conversion receiver based on
CMOS technology for K-band applications. The proposed direct conversion receiver is composed of two active combiners, an lumped LC balun, two power detectors and an analog decode. The designed direct conversion receiver is successfully demodulated BPSK signal with 40 Mbps in the K-band.
Monopole Antenna with a Triangular Patch Structure for Penta-Band Service
Park, Jin-Won ; Cho, rae-June ; Moon, Byong-In ; Lee, Hong-Min ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 136~142
DOI : 10.5515/KJKIEES.2010.21.2.136
In this paper, the microstrip antenna for penta-band service is proposed. It is designed for a wide band characteristic based on a monopole line combined with a triangular patch structure which has two slits. Total antenna size is
and it was fabricated on FR-4 substrate($\varepsilon_r
Design of a Novel 2D-Metamaterial CRLH ZOR Antenna with a Microstrip Patch Capacitively Coupled to a Rectangular Ring
Jang, Geon-Ho ; Kahng, Sung-Tek ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 143~151
DOI : 10.5515/KJKIEES.2010.21.2.143
In this paper, a novel rectangular patch antenna is proposed to have Zeroth Order Resonance(ZOR) generated based on the Metamaterial Complosite Right- and Left-Handed(CRLH) structure. Making the in-phase electric field over the entire antenna other than a half-wavelength as the fundamental resonance mode of a standard microstrip patch or its positive multiple, the metallic patch is suggested to be capacitively coupled with only one surrounding rectangular ring, different from the previous 1D ZOR antennas commonly having several metal cells in line. The performance of the proposed antenna is simulated by a 3D field solver that inputs the sizes of the physical structure corresponding to the equivalent circuit designed to have ZOR at 2.4 GHz. Consequently, the resonance frequency, the gain and the antenna efficiency are observed 2.4 GHz, 5 dB and 98%, respectively. Besides, the important property of the proposed antenna is addressed as the combination of the low profile as an advantage of microstrip patch antennas, and the omni-directional field pattern typical of monopole antennas.
Design of Cavity-Backed High Gain Dual Band Microstrip Antenna Using Frequency Selective Surface
Kim, Byoung-Chul ; Choo, Ho-Sung ; Park, Ik-Mo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 152~163
DOI : 10.5515/KJKIEES.2010.21.2.152
In this paper, a cavity-backed high gain dual band microstrip antenna with Frequency Selective Surface space(FSS) for WLAN is proposed. The proposed antenna that operates in IEEE 802.11a/b bands with similar radiation pattern and gain is fabricated on RO4003 substrate with a dielectric constant of 3.38. The size of the antenna is
, and the FSS size is
. The ground plane size including cavity is
. The antenna is fed by coaxial cable. The simulated bandwidths of the antenna are 2.369~2.517 GHz and 5.608~5.833 GHz for VSWR<2. The gains are 11.23 dBi and 12.60 dBi, respectively, for the lower and upper bands.
Synthetic Aperture Radar Target Detection Using Multi-Cell Averaging CFAR Scheme
Song, Woo-Young ; Rho, Soo-Hyun ; Jung, Chul-Ho ; Kwag, Young-Kil ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 164~169
DOI : 10.5515/KJKIEES.2010.21.2.164
Since the range and Doppler resolution of the synthetic aperture radar(SAR) image becomes very high, the target detection accuracy can be significantly increased, but the computational burden is also increased. The conventional single-cell based CFAR detector performs the target detection on every single cell basis, thus it causes the serious increment of the computational load. In this paper, the improved two-step MCA-CFAR detector is proposed for the improvement of the target detection as well as the reduction of computational load: the first step is to use the MCA-CFAR, and the second step is to use the single-cell based CFAR detection in the expected target area for final decision. The performance of the proposed algorithm is compared with the conventional single-cell based CFAR and MCA-CFAR on SAR images.
Modeling of the Power/Ground Plane Noise Including Dielectric Substrate Loss
Kim, Jong-Min ; Nam, Ki-Hoon ; Ha, Jung-Rae ; Song, Ki-Jae ; Na, Wan-Soo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 170~178
DOI : 10.5515/KJKIEES.2010.21.2.170
In this paper, we propose the modeling of the power/ground plane which includes complex dielectric permittivity and loss tangent for the power/ground coupled noise. In order to estimate the effects of the dielectric substrate for the coupled noise, we used full-wave simulators, HFSS(High Frequency Structure Simulation) and MWS(MicroWave Studio). The simulated results for the commercial substrates are compared with the measured values. TLM(Transmission Line Method) was used for the calculation of power plane impedance using Debye model which depicts the dielectric loss of PCB. Finally, impedance from proposed circuit model showed very good coincidence to the measured data.
MIMO Channel Modeling Using Concept of Path Morphology
Jeong, Won-Jeong ; Yoo, Ji-Ho ; Kim, Tae-Hong ; Kim, Myung-Don ; Chung, Hyun-Kyu ; Bae, Seok-Hee ; Pack, Jeong-Ki ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 179~187
DOI : 10.5515/KJKIEES.2010.21.2.179
The use of high frequency band, broad band and MIMO antenna is expected in the next generation mobile communication system. By the rapid increase of demand for wireless communications and the explosive increase of the mobile communication services, researches for optimization of next-generation mobile communication system are required. In the existing MIMO channel models, propagation-environments are commonly classified into urban, suburban, rural area, etc. However such approaches can have drawbacks in that many different morphologies may exist even in the urban area, for example. In this paper, we introduced path morphology concept, and proposed the method of morphology classification considering the building height, density, etc. Delay spread(DS), angular spread(AS) of AoD and AoA analyzed for each environment using the ray tracing technique. Based on the analysis, a MIMO channel model appropriate in domestic environment was suggested.
Study of SI Characteristic of Multilayer PCB with a Through-Hole Via
Kim, Li-Jin ; Lee, Jae-Hyun ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 188~193
DOI : 10.5515/KJKIEES.2010.21.2.188
In this paper, SI(Signal Integrity) characteristic of the 4-layer PCB(Printed Circuit Boards) with a through-hole via was analyzed by impedance mismatching between the through-hole via and the transmission line, and deterioration of clock pulse response characteristic due to the P/G plane resonances which are generated between the power and the ground plane. The minimized impedance mismatching between the through-hole via and the transmission line for the improving of SI characteristic is confirmed by the TDR(Time Domain Reflector) simulation and lumped element modeling of the through-hole via. And the cancellation method of P/G plane resonances for improvement of the SI characteristic is represented by simulation result.
Design of a Frequency Selective Surface Using DSRRs
Woo, Dae-Woong ; Kim, Jae-Hee ; Ji, Jeong-Keun ; Kim, Gi-Ho ; Seong, Won-Mo ; Park, Wee-Sang ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 194~201
DOI : 10.5515/KJKIEES.2010.21.2.194
We propose a frequency selective surface(FSS) using double split ring resonators(DSRRs) for isolation enhancement between CDMA and RFID. The structure consists of an outer SRR and an inner SRR, and the gaps are formed in the same direction. By properly adjusting the gap and line width, the resonant frequency and skirt characteristics can be adjusted without varying the unit cell size. The proposed structure has a different field distribution from that of an ordinary SRR for magneto-dielectric materials. One layer consists of
unit cells and the other layer was separated by 50 mm. To validate the simulation results, we fabricated the patch antenna and the FSSs, and the measured results show a good agreement with the simulated ones. The electrical size of the unit cell is
, and the size of the two layer FSS is
. The two layer FSS maintain gain in CDMA frequency and has 6.9 dB reduced gain in RFID frequency.
The Open Loop Multiple Split Ring Resonator Based Voltage Controlled Oscillator in 0.13 um CMOS
Kim, Hyoung-Jun ; Choi, Jae-Won ; Seo, Chul-Hun ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 202~207
DOI : 10.5515/KJKIEES.2010.21.2.202
In this paper, a novel voltage-controlled oscillator(VCO) using the open loop multiple split ring resonator(OLMSRR) is presented for improving the phase noise, implemented in 130 nm CMOS technology. Compared with the conventional CMOS LC resonator, the proposed CMOS OLMSRR has the larger coupling coefficient value, which makes a higher Q-factor, and has improved the phase noise of the VCO. The proposed CMOS VCO based OLMSRR has the phase noise of -99.67 dBc/Hz @ 1 MHz in the oscillation frequency. Compared with the VCO using the conventional CMOS LC resonator and the proposed VCO using the CMOS OLMSRR structure has been improved in 7 dB. The prototype 24 GHz CMOS VCO is implemented in 130 nm CMOS and occupies a compact die area of
Novel 10 GHz Bio-Radar System Based on Frequency Multiplier and Phase-Locked Loop
Myoung, Seong-Sik ; An, Yong-Jun ; Moon, Jun-Ho ; Jang, Byung-Jun ; Yook, Jong-Gwan ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 208~217
DOI : 10.5515/KJKIEES.2010.21.2.208
This paper presents a novel 10 GHz bio-radar system based on a frequency multiplier and phase-locked loop(PLL) for non-contact measurement of heartbeat and respiration rates. In this paper, a 2.5 GHz voltage controlled oscillator (VCO) with PLL is employed to as a frequency synthesizer, and 10 GHz continuous wave(CW) signal is generated by using frequency multiplier from 2.5 GHz signal. This paper also presents the noise characteristic of the proposed system. As a result, a better performance and economical frequency synthesizer can be achieved with the proposed bio-radar system. The experimental results shows excellent bio-signal measurement up to 100 cm without any additional digital signal processing(DSP), and the proposed system is validated.
Design and Implementation of CPW-Fed UWB Monopole Antenna
Yu, Ju-Bong ; Jeon, Jun-Ho ; An, Chan-Kyu ; Kim, Woo-Chan ; Yang, Woon-Geun ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 21, issue 2, 2010, Pages 218~223
DOI : 10.5515/KJKIEES.2010.21.2.218
In this paper, a novel CPW(Coplanar Waveguide)-fed UWB(Ultra Wide Band) antenna is designed, implemented, and measured for UWB communications. CPW-fed planar antenna has advantages of wide-bandwidth, low-cost and easy interaction with radio frequency front end circuitry. We have used HFSS(High Frequency Structure Simulator) of Ansoft which is based on the FEM(Finite Element Method) to simulate the proposed antenna. FR-4 substrate of thickness 1.6 mm and relative permitivity 4.4 is used for implementation. The proposed antenna showed VSWR(Voltage Standarding Wave Ratio)
for the frequency band from 3.1 GHz to 10.6 GHz which is used for ultra wide band communication. Measured peak gains are 2.61, 4.95, 2.89, 7.35 dBi at 3, 6, 8, 11 GHz, respectively.