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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 20, Issue 12 - Dec 2009
Volume 20, Issue 11 - Nov 2009
Volume 20, Issue 10 - Oct 2009
Volume 20, Issue 9 - Sep 2009
Volume 20, Issue 8 - Aug 2009
Volume 20, Issue 7 - Jul 2009
Volume 20, Issue 6 - Jun 2009
Volume 20, Issue 5 - May 2009
Volume 20, Issue 4 - Apr 2009
Volume 20, Issue 3 - Mar 2009
Volume 20, Issue 2 - Feb 2009
Volume 20, Issue 1 - Jan 2009
Selecting the target year
A Small UHF RFID Key-Chain Tag Antenna for a Key-Management Metallic Cabinet with Consideration of Coupling of Adjacent Tags and Cabinet
Nam, Sea-Hyeon ; Park, Yong-Kwon ; Jun, Byong-Don ; Chung, You-Chung ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 823~828
DOI : 10.5515/KJKIEES.2009.20.9.823
A small UHF RFID tag antenna for a key-chain installed inside of a metallic key-management cabinet has been designed. The tag antenna has been designed as small size as
with consideration of coupling among the tag antennas and metallic parts of key-chain and cabinet. The tag antenna is fabricated with a meander line dipole using T-matching method with FR-4 substrate. One tag antenna has been designed with consideration of coupling of adjacent tag antennas, and the other has been designed for the location close to the metallic part in the cabinet. The characteristics of tag antennas and reading distance have been analyzed based on the different numbers of adjacent tag antennas. As a results, the 360 tag antennas installed in the cabinet have been successfully recognized.
Design of MediaFLO/GPS/Bluetooth Chassis Mode Antenna for Mobile Handset with Metallic Body
Jung, Kang-Jae ; Lee, Byung-Je ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 829~834
DOI : 10.5515/KJKIEES.2009.20.9.829
In this paper, a HediaFLO/GPS/Bluetooth antenna is designed for mobile handset with metallic chassis. It is consisted of two metal plates with 7.6 mm gap, a connection plate and source between two plates. It can be analyzed as U-slot antenna of
, array of shorted patches each application bands. Simulated and measured performance of the proposed antenna show that it has enough possibility to reuse metallic chassis itself as radiator without any additional space for antenna.
A New Upper Layer Decoding Algorithm for a Hybrid Satellite and Terrestrial Delivery System
Kim, Min-Hyuk ; Park, Tae-Doo ; Kim, Nam-Soo ; Kim, Chul-Seung ; Jung, Ji-Won ; Chun, Seung-Young ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 835~842
DOI : 10.5515/KJKIEES.2009.20.9.835
DVB-SSP is a new broadcasting system for hybrid satellite communications, which supports mobile handheld systems and fixed terrestrial systems. However, a critical factor must be considered in upper layer decoding which including erasure Reed-Solomon error correction combined with cyclic redundancy check. If there is only one bit error in an IP packet, the entire IP packet is considered as unreliable bytes, even if it contains correct bytes. IF, for example, there is one real byte error, in an If packet of 512 bytes, 511 correct bytes are erased from the frame. Therefore, this paper proposed two kinds of upper layer decoding methods; LLR-based decoding and hybrid decoding. By means of simulation we show that the performance of the proposed decoding algorithm is superior to that of the conventional one.
Design of C-Band Frequency Up-Converter in Communication System for Unmanned Aerial Vehicle
Lee, Duck-Hyung ; Oh, Hyun-Seok ; Jeong, Hae-Chang ; Yeom, Kyung-Whan ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 843~852
DOI : 10.5515/KJKIEES.2009.20.9.843
In this paper, we present design, fabrication, and measured results for a frequency upconverter for a wireless communication system of UAV(Unmanned Aerial Vehicle). The specifications of such wireless communication system requires the special features of maximum range of communication as well as deployment in UAV and repairing. The frequency upconverter operating at
in C-band was designed and fabricated considering such special features. The AGC function was included because the required output power should be constant for optimal system operation. The fabricated upconverter showed a constant output power of
input. Spuriouses were below -60 dBc and the adjacent leakage power was below -40 dBc. In addition, LO sources in the upconverter was implemented using the frequency synthesizer with step 1 MHz. This is for the application to the situation where multiple UAVs employed and the possible change of the permitted frequency band. The synthesizer showed a phase noise of -100 dBc/Hz at the 100 kHz frequency offset.
Design and Implementation of Ku-Band VCO for Microwave Multi-Band Receiver
Go, Min-Ho ; Cho, Ho-Yun ; Park, Hyo-Dal ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 853~861
DOI : 10.5515/KJKIEES.2009.20.9.853
In this paper, we propose the architecture of a multi-band receiver which can receive X-band, Ku-band, K-band and Ka-band signals. For implementing this architecture, we designed a wideband and high power VCO with a buffer stage. In order that a buffer does not affect the characteristic of a oscillation in steady state condition, output impedance of a oscillation part and input impedance of a buffer are orthogonally crossed. The fabricated VCO meets the performance parameter of the multi-band receiver which has a
bandwidth with respect to the tuning voltage,
, and output power of
A Study on a Rectenna for Low Power Density at 2.45 GHz
Park, Bong-Kook ; Seo, Hong-Eun ; Cho, Ik-Hyun ; Kim, Yea-Ji ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 862~867
DOI : 10.5515/KJKIEES.2009.20.9.862
This paper presents a study on a rectenna for rectification of incident low power microwave signals with power densities less than 2 mW/
at 2.45 GHz. The proposed rectenna is designed and implemented by a rectifier with voltage doubler structure and a printed Yagi antenna which suppress re-radiation of the second order harmonic of fundamental frequency. The printed Yagi antenna has a gain of about 5 dB, and the measured conversion efficiencies of the rectenna are from 32 % to 42 % when its incident power levels are from 0 dBm to 14 dBm. The developed rectenna is expected to be useful in the power transmission system.
Channel Model and Wireless Link Performance Analysis for Short-Range Wireless Communication Applications in the Terahertz Frequency
Chung, Tae-Jin ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 868~882
DOI : 10.5515/KJKIEES.2009.20.9.868
In this paper, channel model and wireless link performance analysis for the short-range wireless communication system applications in the terahertz frequency which is currently interested in many countries will be described. In order to realize high data rates above 10 Gbps, the more wide bandwidths will be required than the currently available bandwidths of millimeter-wave frequencies, therefore, the carrier frequencies will be pushed to THz range to obtain larger bandwidths. From the THz atmospheric propagation characteristics based on ITU-R P.676-7, the available bandwidths were calculated to be 68, 48 and 45 GHz at the center frequencies of 220, 300 and 350 GHz, respectively. With these larger bandwidths, it was shown from the simulation that higher data rate above 10 Gbps can be achieved using lower order modulation schemes which have spectral efficiency of below 1. The indoor propagation delay spread characteristics were analyzed using a simplified PDP model with respect to building materials. The RMS delay spread was calculated to be 9.23 ns in a room size of
for the concrete plaster with TE polarization, which is a similar result of below 10 ns from the Ray-Tracing simulation in the reference paper. The indoor wireless link performance analysis results showed that receiver sensitivity was
over bandwidth of
and antenna gain was calculated to be
at link distance of 10m under the BPSK modulation scheme. The maximum achievable data rates were estimated to be 30, 16 and 12 Gbps at the carrier frequencies of 220, 300 and 350 GHz, respectively, under the A WGN and LOS conditions, where it was assumed that the output power of the transmitter is -15 dBm and link distance of 1 m with BER of
. If the output power of transmitter is increased, the more higher data rate can be achieved than the above results.
Pulse-to-Pulse Coding for Channel Interference Suppression of Short Range Radar for GVES
Park, Gyu-Churl ; Ha, Jong-Soo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 883~889
DOI : 10.5515/KJKIEES.2009.20.9.883
Since the SRRs(Short Range Radar) load on the GVESs(Ground Vehicle Equipment System) are operated within several hundred meters, it is important to suppress the interferences between the SRRs. These interference are reduced using the frequency separation between channels, however this method isn`t a perfect solution owing to a difficulty of a realization for the interference suppression. Thus, a pulse-to-pulse coding used to suppress the interference fundamentally is proposed in this paper. The concept, the application method and the test results of the proposed method have been described in this paper.
Cooperative Transmission Scheme for Mobile Satellite Broadcasting Systems
Ahn, Do-Seob ; Park, Dong-Chul ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 890~899
DOI : 10.5515/KJKIEES.2009.20.9.890
One of major services for the next generation mobile satellite system will be multimedia broadcasting and multi-casting service(MBMS). An integrated satellite and terrestrial network can be considered to provide those services seamlessly and cooperatively. This paper presents efficient cooperative transmission architectures for integrated satellite and terrestrial network. First, an integrated satellite and terrestrial system architectures is introduced, and several cooperative transmission architectures for the integrated system are derived. Extensive performance simulation results reveal that the proposed architectures can improve the system performance and make an efficient transmission.
A Gain and NF Dynamic Controllable Wideband Low Noise Amplifier
Oh, Tae-Soo ; Kim, Seong-Kyun ; Huang, Guo-Chi ; Kim, Byung-Sung ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 900~905
DOI : 10.5515/KJKIEES.2009.20.9.900
A common drain feedback CMOS wideband LNA with current bleeding and input inductive series-peaking techniques is presented in this paper. DC coupling is adopted between cascode and feedback amplifiers, so that the gain and NF of the LNA can be dynamically controlled by adjusting the bleeding current. The fabricated LNA shows the bandwidth of 2.5 GHz. The high gain mode shows 17.5 dB gain with
NF and consumes 27 mW power and the low gain mode has 14 dB gain with
NF and dissipates 1.8 mW from 1.8 V supply.
An Implementation of a 4-Bit Diode Phase Shifter in the Parallel Plate Waveguide for the RADANT Lens
Lee, Kee-Oh ; Park, Dong-Chul ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 906~913
DOI : 10.5515/KJKIEES.2009.20.9.906
In this paper, the design concept and implementation method of the X-band 4-bit(
BIT) diode phase shifter in the parallel plate waveguide are introduced. The simulated results of
dielectric phase shift layers using CST`s MWS and Agilent`s ADS are presented, and the measured results are compared with the simulated ones. The simulated phase shift errors at the center frequency are
, respectively and the measured phase shift errors at the center frequency are
, respectively. Also, the MWS simulated results of
BIT phase shifter are presented and compared with the ADS simulated ones to verify the validity of the presented design concept and implementation method.
Modified Fold Type Helicone Reflector for Efficient Satellite TT&C Having Variable Coverage Area
Lee, Sang-Min ; Lee, Woo-Kyung ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 914~923
DOI : 10.5515/KJKIEES.2009.20.9.914
Helix antennas have been widely applied to satellite TT&C, data communication and GPS receiver systems onboard military, remote sensing and communication purpose satellites. The helix antennas are known to be convenient to control impedance and radiation coverage characteristics with a maximum directivity in satellite z-axis. Waveguide horn is commonly used for radar system that needs ultra-wideband pulse for exploration ground radar and electromagnetic disability measurement etc. It has high efficiency and low reflection characteristics provided by the low-profile shape and suppressed radiation distortion. In this paper, a waveguide horn structure incorporated with helix antenna design is proposed for satellite applications that require ultra-wideband pulse radar and high rate RF data communication link to ground station over wide coverage area. The main design concern is to synthesize variable beam forming pattern based on modified horn-helix combination helicone structure such that multi-mission antenna is implemented applicable for TT&C, earth observation, high data rate transmission. Waveguide horn helps to reduce the overall antenna structure size by introduction fold type reflector connected to the tapered helix antenna. The next generation KOMPSAT satellite currently under development requires high-performance precision attitude control system. We present an initial design of a hybrid hern-helix antenna structure suitable for efficient RF communication module design of multi-purpose satellite systems.
Dual-Band MIMO Antenna Using a Band Stop Matching Circuit for USB Dongle Applications
Han, Min-Seok ; Choi, Jae-Hoon ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 924~929
DOI : 10.5515/KJKIEES.2009.20.9.924
In this paper, a dual-band MIMO antenna with a band stop matching circuit for next generation USB dongle application is proposed. The proposed multiband MIMO antenna consists of two dual-band PIFAs which provide wideband characteristics. In order to improve the isolation characteristic at the LTE(Long Term Evolution) band, a band stop matching circuit was inserted at the corner of each antenna element. The inserted band stop matching circuit is to suppress the surface current at the specific frequency band and to generate two additional resonances around 770 MHz for LTE band and near 830 MHz for digital communications network(DCN) service. The proposed MIMO antenna can cover LTE and DCN services, simultaneously.
A Compact Metamaterial Chip Antenna with Ground Coupling Structure for Bluetooth Application
Park, Young-Hwan ; Lee, Kang-Hee ; Ji, Jeong-Keun ; Ryu, Ji-Woong ; Kim, Gi-Ho ; Seong, Won-Mo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 930~935
DOI : 10.5515/KJKIEES.2009.20.9.930
This paper describes a miniaturezed metamaterial BT chip antenna for mobile devices. The size of the proposed antenna is
. And it is fabricated by chip type. The zeroth-order resonant properties are analyzed by magnitude and phase distributions of the surface current using surface current scanning system. The antenna offers omni-directional radiation patterns and measured 3D average gain is over - 1.7 dBi.
Resonance Characteristics of a Metallic Enclosure Having Sub-Cavity with Lossy Dielectric Materials
Lim, Sung-Min ; Jung, Sung-Woo ; Kim, Ki-Chai ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 936~942
DOI : 10.5515/KJKIEES.2009.20.9.936
This paper presents the delivered power and reflection coefficient in metallic shielding enclosure with a sub-cavity, which are evaluated with the method of moments, sad describes a method for controlling the resonance characteristics of the metallic cavity by putting lossy dielectric material in the sub-cavity. In this paper we introduce carbon polystyrene-foam as lossy dielectric material and observe it`s effects of reduction when the dimensions of the sub-cavity and permittivity of lossy dielectric material are changed. The results show that the reduction of the electromagnetic radiation can be achieved by controlling the amount of carbon in lossy dielectric material and the dimensions of the sub-cavity. The theoretical analysis is verified by the measured delivered power.
Design and Implementation of Radio Sensor Receiver for Measuring the Position of the Sun
Park, Jin-Woo ; Choi, Yeon-Ung ; Cho, Hong-Lyul ; Son, Hong-Min ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 943~953
DOI : 10.5515/KJKIEES.2009.20.9.943
In this paper, we propose a radio sensor to measure the position of the sun for the solar tracker of a photovoltaic system. In order to satisfy the requirement for the measurement accuracy within
, the sensor receiver with high gain, high sensitivity and wide bandwidth is designed and implemented. The receiver has the bandwidth of 104 MHz, the system gain of 69 dB and the sensitivity of 0.46 K at 5.1 GHz. The processes of design and implementation of the radio sensor receiver are described in this paper. The effectiveness of the proposed radio sensor in the measurement of the position of the sun is demonstrated experimentally under the condition of cloud cover. The results show the radio sensor can measure the position of the sun within the accuracy of
Indoor Positioning System Using Robust Outlier Extended Kalman Filter
Kim, Dong-Seon ; Yeom, Hak-Sun ; Kim, Sun-Woo ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 954~960
DOI : 10.5515/KJKIEES.2009.20.9.954
In this paper, Indoor Positioning System based on Wi-Fi system which is one of the key technology in LBS(Location Based Service) is proposed. The proposed system estimates distance between MS(Mobile Station) and AP(Access Point) using RSSI(Received Signal Strength Indicator). RSSI is affected by outlier that originate from indoor environment complexity and obstacle. In this paper, we introduce a Robust outlier Extended Kalman Filter that can ignore, real-time outlier in the observations. To demonstrate performance of proposed indoor positioning system, we used a PDA as the MS.
Low Phase Noise VCO Using the Metamaterial Broadside Coupled Spiral Resonator
Han, Kyoung-Nam ; Seo, Chul-Hun ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 961~966
DOI : 10.5515/KJKIEES.2009.20.9.961
In this paper, a novel voltage-controlled oscillator(VCO) using the metamaterial broadside coupled spiral resonators(BC-DSRs) is presented for reducing the phase noise. For reducing of the phase noise, the series spiral structures have been applied for the signal plane and ground plane at each in order to have the large coupling. Compared with the conventional VCO, the proposed VCO has the larger coupling coefficient constant, which makes a higher Q-factor and has reduced the phase noise of the VCO. The proposed VCO has the phase noise of
/Hz at 100 kHz in the tuning range,
. The figure of merit(FOM) of this VCO is
/Hz at 100 Hz in the same tuning range, respectively.
Implementation of High Stable Phase-Locked Oscillator for X-Band Satellite Communication
Lim, Jin-Won ; Joung, In-Ki ; Rhee, Young-Chul ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 967~973
DOI : 10.5515/KJKIEES.2009.20.9.967
In this paper, X-band satellite communication oscillator of double phase locked is implemented by constructing a couple of phased-locked loop, and then we have analyzed the phase noise of designed PLL-DRO. The designed phase-locked oscillator is consist of series feedback DRO, frequency divider, phase detector, loop filter and programmable PLL-IC. By dividing oscillation frequency of 12.6 GHz into two frequencies, it exhibits output power of 15.32 dBm at 6.3 GHz. Phase noises of implemented oscillator are -81 dBc/Hz@100Hz, -100.86 dBc/Hz@1 kHz, -111.12 dBc/Hz@10 kHz, -116 dBc/Hz@100 kHz and -140.49 dBc/Hz@1 MHz respectively. These indicate excellent stable operation of oscillator and very good phase noise characteristics.
Phase Noise Characterization with Optical Carrier Suppression Level on Continuous Wave in the Ranges of Millimeter Waves Generated by Photomixing of Optical Double Sideband-Suppressed Carrier(DSB-SC)
Kim, Sung-Il ; Kang, Kwang-Yong ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 974~982
DOI : 10.5515/KJKIEES.2009.20.9.974
Photomixing techniques beating two optical signals with different wavelengths and strong correlations are also very useful techniques to make a continuous wave(CW) signals in the range of millimeter(mm) and terahertz(THz) frequencies. An optical double sideband-suppressed carrier(DSB-SC) technique is one of the popular techniques to generate two optical signals with different wavelengths and strong correlations. DSB-SC signals with strong correlations are generated by a CW modulation of an optical carrier with a local oscillator and an optical modulator. In the previous parers related the DSB-SC for producing the CW signals within the range of mm and THz frequencies, there have been no reports why the optical carrier should suppress. In order to clear that, we have analyzed and measured the characteristics of the mm-wave CW signals made by the DSB-SC photomixing in this paper. From our analysis and measurement results, compared with the case of the DSB with the maximized optical carrier, the power and phase noise have improved about 23.9 dB and 21 dBc/Hz(@ 1 MHz offset frequency) in the case of the DSB with the minimized optical carrier (that is to say, the DSB-SC). Consequently, it is evident reason that the optical carrier should sufficiently suppress to obtain the mm-wave CW signals with the high power and low noise. This paper has given very helpful data to make mm- and THz-wave CW signals using photomixing techniques with the DSB-SC because the reason why the optical carrier should be suppressed is reported in this paper based on the numerical and experimental results.
Induced Voltages on Telecommunication Lines Due to AC High-Speed Electrified Railway System
Oh, Ho-Seok ; Kang, Seong-Yong ; Yun, Ju-Young ; Kim, Hak-Chul ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 983~988
DOI : 10.5515/KJKIEES.2009.20.9.983
This paper analyzed the induced voltages on a telecommunication line due to high-speed a.c. electrified railway system. The induced voltages were measured by domestic regulation, 2 test lines with 2 km length were installed near railway in parallel to compare the influence for distance from disturbing line. The analysis was made on the induced voltages with the distance from railway, line length, and the different earthing point, and also on the waveform and spectrum distributions. The statistical induced voltages for the time for a day and dates was analyzed.
Development of a 3.5 mm Coaxial Microcalorimeter for Microwave Power Standards
Kwon, Jae-Yong ; Kim, Jeong-Hwan ; Kang, Tae-Weon ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 989~996
DOI : 10.5515/KJKIEES.2009.20.9.989
RF and microwave power is a basic quantity in electromagnetic metrology which linked directly to major electro-magnetic quantities such as attenuation, RF voltage, antenna characteristics and field strength. This paper deals with a power meter and power sensor with associated theory for RF and microwave power measurement. We study the theory and the key aspects in design of a 3.5 mm coaxial microcalorimeter which works from 50 MHz to 26.5 GHz as a primary microwave power standard.
Wideband ENG Zeroth-Order Resonant Antenna Having Mushroom Shape
Chang, Woo-Cheol ; Lee, Bom-Son ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 997~1002
DOI : 10.5515/KJKIEES.2009.20.9.997
This Letter presents a wideband ENG(Epsilon Negative) ZOR(Zeroth-Order Resonant) antenna designed on a microstrip line. It has a mushroom structure and its size is only
at 12 GHz) owing to zeroth-order resonance. The design procedures with closed form solutions are provided using transmission line theory considering radiation loss. The measured antenna bandwidth is about 20.0 % at 9.2 GHz and antenna gain is 7.1 dBi despite the compact size.
Study on Wave Propagation Characteristics Modeling in Tunnel
Jeong, Won-Jeong ; Kim, Tae-Hong ; Han, Il-Tak ; Choi, Moon-Young ; Ryu, Joon-Gyu ; Lee, Ho-Jin ; Pack, Jeong-Ki ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 1003~1013
DOI : 10.5515/KJKIEES.2009.20.9.1003
In the domestic environments, there are many tunnels since most of terrains have mountains. To ensure the quality of wireless network service in NLOS environment like tunnels which differ from indoor or outdoor wireless channels, researches on wave-propagation characteristics. through such channel are necessary. Especially, in such environment the ground repeater called Gap-Fillers are usually used for satellite mobile services. To make sure that mobile service using satellites in tunnels is available, the research about Gap Filling method is essential. This research is focus on the characterising the wave-propagation through tunnels, to find the appropriate frequency, HPBW of the Gap-Filler antennas, the number of Gap-Fillers, etc. In this paper, we present the effective Gap Filling method in tunnels for ISM band, based on analysis of ray tracing and measurement results.
Design and Fabrication of UWB Antenna Using the SRR for WLAN Band Rejection
Jo, Nam-I ; Kim, Dang-Oh ; Kim, Che-Young ; Choi, Dong-Muk ;
The Journal of Korean Institute of Electromagnetic Engineering and Science, volume 20, issue 9, 2009, Pages 1014~1020
DOI : 10.5515/KJKIEES.2009.20.9.1014
In this paper, a novel UWB(Ultra Wide-band) antenna with suppressed band of IEEE 802.11a(
) WLAN was designed and fabricated by using SRR(Split Ring Resonator) with band rejection property. MWS(Micro-wave Studio) of CST company was utilized in the design stage. The antenna was fabricated on a substrate, Rogers 4003, with the thickness of 0.8 mm and relative permittivity of 3.38. The measured result shows that the proposed antenna has a good return loss below -10 dB and group delay below 1nsec over UWB communication band(
) except WLAN band. It also shows the omni-directional radiation pattern.