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Design of GPS Antenna using Dielectric Resonator
Sinhyung Jeon,Hyengcheul Choi,Hojeong Kim,Junghwan Yeom,Hyeongdong Kim 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, the design of the RHCP (right hand circular polarization) dielectric resonator antenna for GPS (Global Positioning Systems) is proposed. For the miniaturization size of antenna, high-permittivity dielectric (εr=30) is used. Also in order to obtain circular polarization of low-profile rectangular dielectric resonator antenna, the proposed antenna is simply excited by single strip line. The proposed single feeding method consisting of a loop shape can easily excite two orthogonal modes (TE<SUP>x</SUP>δ11, TE<SUP>y</SUP>δ11) within the single resonator and easily achieve circular polarization. Using EM simulation, antenna characteristic parameters are found. Based on these results, antenna is manufactured. The simulated and measured results of proposed design are presented.
Planar Inverted-E (PIE) Antenna for a Wide Impedance Bandwidth
JEON, Sinhyung,CHOI, Hyengcheul,KIM, Hyeongdong The Institute of Electronics, Information and Comm 2010 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.93 No.11
<P>A planar inverted-E (PIE) antenna that can achieve a wide impedance bandwidth is proposed. The antenna is realized by inserting a branch capacitance between the feed line and the shorting pin of a conventional planar inverted-F antenna (PIFA). Such a modification significantly enhanced the impedance bandwidth while maintaining the antenna size. The proposed antenna possesses a very wide impedance bandwidth of 1250MHz (1650-2900MHz) at a voltage standing wave ratio (VSWR) <3. In addition, good radiation patterns were obtained at the desired frequency bands.</P>
Circular Polarization Dielectric Resonator Antenna Excited by Single Loop Feed
Sinhyung Jeon,Hyengcheul Choi,Hyeongdong Kim 한국전자통신연구원 2009 ETRI Journal Vol.31 No.1
A new feeding method for the circular polarization (CP) dielectric resonator antenna (DRA) is proposed in this letter. Two orthogonal modes (TExδ11, TEy1δ1) of the rectangular DRA are excited by a 90-degree phase difference of the differential and common modes currents of the proposed feeding structure. To demonstrate the good CP performance of the proposed method, a right-hand CP DRA for a global positioning system was designed. The impedance bandwidth of the proposed antenna for S11<-10 dB and 3 dB axial ratio bandwidth are about 5.4% and 1.95% at 1.57 GHz, respectively.
Hybrid Planar Inverted-F Antenna with a T-Shaped Slot on the Ground Plane
Sinhyung Jeon,Hyengcheul Choi,김형동 한국전자통신연구원 2009 ETRI Journal Vol.31 No.5
In this letter, a novel hybrid planar inverted-F antenna (PIFA) with a T-shaped slot on the ground plane is proposed. The loop structure formed by the feed line and shorting pin can be operated as a series and shunt inductance for the PIFA and the T-shaped slot antenna, respectively. The PIFA operates at a frequency of 1.75 GHz, while the T-shaped slot on the ground plane operates at 2.4 GHz by the same voltage feeding source. The height of the PIFA is 6.5 mm, and the size of an upper patch is designed to be 30 mm × 16 mm. The measured relative impedance bandwidth of the PIFA and the T-shaped slot are about 12% and 21%, respectively. In addition, good antenna performance was achieved.
Compact Hybrid DRA Combined with PIFA
YEOM, Junghwan,JEON, Sinhyung,CHOI, Hyengcheul,KIM, Hyeongdong The Institute of Electronics, Information and Comm 2010 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.93 No.10
<P>A dielectric resonator antenna (DRA) is located below a radiating patch of an planar inverted F antenna (PIFA) to achieve a compact hybrid antenna and a multiple band operation. Loop-type structures with PIFA shorting pins are used as feeds for both the DRA and the PIFA. The proposed antenna operates well in two frequency bands without perturbing the fundamental radiation characteristics of each operating radiation mode of the DRA and the PIFA. Its electromagnetic performance and the desirable practical size of the proposed hybrid antenna are attractive for small mobile communication devices.</P>
Sangwook Nam,Sinhyung Jeon,Jusun Won 한국전자파학회JEES 2016 Journal of Electromagnetic Engineering and Science Vol.16 No.2
In this paper, a method for identifying the appropriate position on the ground plane for antennas is proposed based on the current correlation coefficient (C³). This method explains that the mutual coupling between antennas when locating several antennas on the same ground plane is necessary. Given the current distribution on the ground plane induced by each antenna, easily estimating the coupling between antennas is possible. This paper also demonstrates that the proposed method can be used in the design of a multi-input multioutput system. The measured data are in good agreement with the simulation results.
Critical coupling of a planar inverted F-antenna using a ferrite sheet
Kim, Hojeong,Choi, Hyengcheul,Jeon, Sinhyung,Kim, Hyeongdong Wiley Subscription Services, Inc., A Wiley Company 2010 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS Vol.52 No.2
<P>In this letter, a novel method that can achieve critical coupling in a planar inverted F-antenna of high height is proposed. Theproposed antenna can achieve critical coupling by attachment of a ferrite sheet without changing the size of the antenna or ground plane. A ferrite sheet is used to increase shunt inductance of the shorting pin loop. The proposed antenna is modeled by an equivalent circuit based on transmission line modeling. It has a very wide bandwidth of 16% for a voltage standing wave ratios <2. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 400–403, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24950</P>