Vol. 10
Latest Volume
All Volumes
PIERL 108 [2023] PIERL 107 [2022] PIERL 106 [2022] PIERL 105 [2022] PIERL 104 [2022] PIERL 103 [2022] PIERL 102 [2022] PIERL 101 [2021] PIERL 100 [2021] PIERL 99 [2021] PIERL 98 [2021] PIERL 97 [2021] PIERL 96 [2021] PIERL 95 [2021] PIERL 94 [2020] PIERL 93 [2020] PIERL 92 [2020] PIERL 91 [2020] PIERL 90 [2020] PIERL 89 [2020] PIERL 88 [2020] PIERL 87 [2019] PIERL 86 [2019] PIERL 85 [2019] PIERL 84 [2019] PIERL 83 [2019] PIERL 82 [2019] PIERL 81 [2019] PIERL 80 [2018] PIERL 79 [2018] PIERL 78 [2018] PIERL 77 [2018] PIERL 76 [2018] PIERL 75 [2018] PIERL 74 [2018] PIERL 73 [2018] PIERL 72 [2018] PIERL 71 [2017] PIERL 70 [2017] PIERL 69 [2017] PIERL 68 [2017] PIERL 67 [2017] PIERL 66 [2017] PIERL 65 [2017] PIERL 64 [2016] PIERL 63 [2016] PIERL 62 [2016] PIERL 61 [2016] PIERL 60 [2016] PIERL 59 [2016] PIERL 58 [2016] PIERL 57 [2015] PIERL 56 [2015] PIERL 55 [2015] PIERL 54 [2015] PIERL 53 [2015] PIERL 52 [2015] PIERL 51 [2015] PIERL 50 [2014] PIERL 49 [2014] PIERL 48 [2014] PIERL 47 [2014] PIERL 46 [2014] PIERL 45 [2014] PIERL 44 [2014] PIERL 43 [2013] PIERL 42 [2013] PIERL 41 [2013] PIERL 40 [2013] PIERL 39 [2013] PIERL 38 [2013] PIERL 37 [2013] PIERL 36 [2013] PIERL 35 [2012] PIERL 34 [2012] PIERL 33 [2012] PIERL 32 [2012] PIERL 31 [2012] PIERL 30 [2012] PIERL 29 [2012] PIERL 28 [2012] PIERL 27 [2011] PIERL 26 [2011] PIERL 25 [2011] PIERL 24 [2011] PIERL 23 [2011] PIERL 22 [2011] PIERL 21 [2011] PIERL 20 [2011] PIERL 19 [2010] PIERL 18 [2010] PIERL 17 [2010] PIERL 16 [2010] PIERL 15 [2010] PIERL 14 [2010] PIERL 13 [2010] PIERL 12 [2009] PIERL 11 [2009] PIERL 10 [2009] PIERL 9 [2009] PIERL 8 [2009] PIERL 7 [2009] PIERL 6 [2009] PIERL 5 [2008] PIERL 4 [2008] PIERL 3 [2008] PIERL 2 [2008] PIERL 1 [2008]
2009-09-09
PIER Letters
Vol. 10, 185-191, 2009
download: 118
A Compact Dual-Band Power Divider Using Planar Artificial Transmission Lines for GSM/DCS Applications
Tao Yang Chang-Jun Liu Liping Yan Ka-Ma Huang
A compact dual-band power divider for GSM/DCS applications is proposed in this letter. Novel planar artificial transmission lines are applied to miniaturize the power divider and achieve wideband response. The proposed dual-band power divider is about 37% of conventional one. The design principle, simulated and measured results are all discussed. The measured results show that good performance can be achieved at the operation frequencies.
2009-08-27
PIER Letters
Vol. 10, 171-184, 2009
download: 125
Ultra-Wideband and Miniaturization of the Conventional Inset Feed Microstrip Patch with Modified Ground Plane for Wireless Applications
Dalia Mohammed Nasha Elsheakh Hala Elsadek Esmat A. Abdallah Magdy F. Iskander Hadia Elhenawy
In this paper, ultra-wideband and miniaturization, technique for the microstrip monopole patch antenna (MMPA) in wireless applications is presented. Ultra-wideband was achieved by using Printed modified ground plane on a dielectric substrate with 50­ microstrip feed line. This technique allows the bandwidth of the MMPA to be ultra-wideband with satisfactory radiation properties and reduce the antenna size. The proposed antenna with modified ground plane provides an mpedance bandwidth (S11 < -10 dB) more than 5.5 GHz corresponding to 116% of fundamental resonant frequency with reduction in antenna size by 20% from original size. For further improvement in antenna characteristics, electromagnetic band-gap (EBG) structure is used. The surface wave was suppressed so the antenna bandwidth was increased to be 3--11 GHz corresponding to 170%, and the antenna size was reduced 43% of its original size. Two types of EBG are used. Holes are drilled around the patch, and embedded circular patches of the electromagnetic band-gap structure with suitable dimension are used. Details of the proposed antenna design have been described, and the typical experimental results are presented and discussed. Commercial software high frequency structure simulator (HFSS®) version 11 was used for the antenna design.
2009-08-25
PIER Letters
Vol. 10, 163-170, 2009
download: 88
Clover Array --- Polarisation Diversity Solution for Ultra Wideband Systems
Adam Narbudowicz Grzegorz Adamiuk Wlodzimierz Zieniutycz
In this paper, we present an innovative method of cross-polarisation suppression by forming the antennas in a so called Clover Array (CA). Such structure enables usage of polarisation diversity even for UWB systems. The simplified theoretical model of operation is presented as well as exemplary results of crosspolarisation patterns. The theory was verified for CA of planar Volcano-Smoke antennas. For fabricated array the cross-polarisation in main beam is below -14 dBi in the whole FCC-UWB frequency range (3.1 GHz - 10.6 GHz).
2009-08-25
PIER Letters
Vol. 10, 157-162, 2009
download: 112
Miter Bend Mirror Design for Corrugated Waveguides
Shaolin Liao
Miter bend mirror has been designed for microwave transmission between two corrugated waveguides of the same size by iterative phase correction method. Geometrical Optics (GO) approximation has been used in our design at a frequency of 110 GHz. The equivalence principle is also adopted to forward-propagate and backward-propagate the beam onto the miter-bend mirror. The designed miter bend mirror shows a coupling coefficient up to 99.619%, much better than that of a flat mirror. The convergence rate shows that the design is very efficient with only a few iterations required.
2009-08-22
PIER Letters
Vol. 10, 145-155, 2009
download: 110
Left-Handed Materials Based on Crystal Lattice Vibration
Rui Wang Ji Zhou Changqing Sun Lei Kang Qian Zhao Jingbo Sun
An all-dielectric composite route is proposed for the construction of a left-handed material at THz frequency. It is shown that the interaction between the crystal lattice vibration of the polaritonic dielectric and the electromagnetic wave could induce a negative permittivity. By combining the electric inclusion of polaritonic dielectric with the magnetic inclusion based on Mie resonance, the dielectric composite exhibits simultaneously negative permittivity and negative permeability, hence a negative refractive index. Additionally, the simulation results of the electromagnetic coupling between the electric and magnetic inclusions indicate that the behavior of the negative refractive index is closely related to the distance between the two inclusions.
2009-08-21
PIER Letters
Vol. 10, 135-143, 2009
download: 101
Optimization of Three-Dimentional (3-D) Ground Structure for Improved Circularly Polarized Microstrip Antenna Beamwidth
You-Huo Huang Shi-Gang Zhou Jie Ma Qi-Zhong Liu
A novel circularly polarised (CP), single-fed widebeam microstrip antenna is presented. The antenna consists of a corner-truncated square patch and a three dimensional circular ground structure. Simulated and measured results show that, owing to the ground structure, the 3 dB beamwidth of the CP radiation can reach more than 165o, which is about 85o, greater than that of a corresponding regular microstrip antenna. It is also shown that experimental results were in good agreement with the simulated performance. Details of the proposed 3-D circular ground structure are described, and the effects of various dimensions of the proposed ground structure on the beamwidth enhancement of CP radiation are studied.
2009-08-10
PIER Letters
Vol. 10, 125-133, 2009
download: 86
A Novel 3-D Transition and Power Divider Based on Half-Mode SICC Structure
Jian Gu Yong Fan Yong-Hong Zhang Dakui Wu
In this paper, a new kind of 3D transition and power divider based on half mode substrate integrated circular cavity (HSICC) is proposed. This novel HSICC transition and power divider can be easily integrated into microwave and millimeter-wave multilayer circuits using LTCC technology. What is more, it can reduce nearly half size of normal SICC resonator and has the advantages of high flexibility, low insertion loss and amplitude imbalance. Two different 3D simulation tools are employed to validate the design method of this novel structure.
2009-08-10
PIER Letters
Vol. 10, 115-124, 2009
download: 80
2-Dal Simulation of EM Fields Radiated by Rotating Cylinder Carrying Surface Currents Using Passing Center Swing Back Grids Technique
Mingtsu Ho
The passing center swing back grids (PCSBG) technique, in conjunction with the method of characteristics (MOC), was proposed to model electromagnetic problems featured with rotating objects. The drive of this proposal lays mainly on the fact that MOC defines all field components in the center of grid cell. Its practicability was validated by exhibiting the radiated EM fields from a rotating cylinder which carries surface currents with Gaussian profile and flowing in the axial direction. To clearly demonstrate that the cylinder is rotating and radiating EM fields simultaneously, the following arrangements were made. The cylinder may be equally sliced into an even number of segments that are with and without currents alternatively since a rotating circular cylinder yields no relativistic effects. The computational results showed that the radiated electromagnetic fields bear vortex structures as the cause of rotating cylinder, which serves as the evidences that PCSBG works properly.
2009-08-07
PIER Letters
Vol. 10, 107-113, 2009
download: 89
Two-Port Antenna with High Isolation for DTV/GSM/UMTS Indoor Applications
Shi-Gang Zhou Bao-Hua Sun Yun-Fei Wei Qi-Zhong Liu
A two-port antenna with high isolation for digital television system (DTV), global system for mobile communication (GSM), and universal mobile telecommunications system (UMTS) indoor applications is presented. The antenna consits of a disk loaded sleeve monopole antenna and an inverted-L plate antenna, which are combined into one radiation structure. In addition, by using a choke tube and C-shaped slot inserted into the plate, the isolation between the two ports is impoved. A prototype is constructed and tested. The simulated and meseasued results are given.
2009-08-04
PIER Letters
Vol. 10, 97-105, 2009
download: 100
Small Tapered Slot Antenna with a Band-Notched Function for Wireless Applications
Yue Song Yong-Chang Jiao Tian-Ling Zhang Gang Zhao Fu-Shun Zhang
a small tapered slot antenna with a notched band for wireless applications is proposed in this paper. A modified transition from microstrip to slotline is used to introduce a notched band from 4.90 to 6.34 GHz. Corrugated edges on the ground is also used to improve the radiation patterns at the lower frequency band. Relatively stable radiation patterns and consistent group delay except the notched band have been obtained as proved experimentally.
2009-07-28
PIER Letters
Vol. 10, 87-95, 2009
download: 91
The Optical Properties of Bragg Fiber with a Fiber Core of 2-Dimension Elliptical-Hole Photonic Crystal Structure
Jin-Jei Wu Daru Chen Kun-Lin Liao Tzong-Jer Yang Wei-Line Ouyang
The optical properties of birefringent Bragg fiber with a fiber core of 2-dimension (2D) elliptical-hole photonic crystal structure has been study. Elliptical air holes are introduced into the fiber core to form a normal 2D photonic crystal structure with a hole pitch (center-to-center distance between the air holes) much smaller than the operation wavelength of the Bragg fiber. The elliptical-hole photonic crystal structure acts as an anisotropic medium with different effective indices for transmission light of different polarization, which inevitably results in high birefringence (up to the order of magnitude of 0.01) of the Bragg fiber. The proposed Bragg fiber possesses different band-gaps for differently polarized mode. Besides the periodic alternating layers of high/low refractive indices, the bandwidth of the band-gap is also dependent on the effective index of the fiber core, which can be controlled by the area of the elliptical air holes.
2009-07-28
PIER Letters
Vol. 10, 77-86, 2009
download: 117
PEMC Paraboloidal Reflector in Chiral Medium Supporting Positive Phase Velocity and Negative Phase Velocity Simultaneously
Tariq Rahim Muhammad Junaid Mughal Qaisar Naqvi
Focal region fields of a perfect electromagnetic conductor (PEMC) paraboloidal reflector placed in homogenous and reciprocal chiral medium are analyzed under the effect of high chirality parameter. The chiral medium supports both negative phase velocity (NPV) and positive phase velocity (PPV) modes simultaneously under strong electromagnetic coupling. The geometrical optics (GO) fields have singularities at the focal region. Therefore, to avoid these singularities Maslov's method is used for the focal region fields. The results obtained using this method are solved numerically, and line plots for the reflected field of the paraboloidal PEMC reflector are obtained for different values of admittance of the PEMC paraboloidal reflector and chirality parameter of the medium.
2009-07-27
PIER Letters
Vol. 10, 69-75, 2009
download: 103
Topological Solitons in 1+2 Dimensions with Time-Dependent Coefficients
Benjamin Sturdevant Dawn A. Lott Anjan Biswas
This paper obtains the topological 1-soliton solution of the nonlinear Schrodinger's equation in 1+2 dimensions, with power law nonlinearity and time-dependent coefficients. The solitary wave ansatz is used to obtain the solution. It will also be proved that the power law nonlinearity must reduce to Kerr law nonlinearity for the topological solitons to exist.
2009-07-24
PIER Letters
Vol. 10, 59-67, 2009
download: 144
Scattering by a Perfect Electromagnetic Conducting Elliptic Cylinder
Abdul-Kadir Hamid Francis Cooray
An exact analytic solution is presented to the problem of scattering of a plane wave from a perfect electromagnetic conducting (PEMC) elliptic cylinder, using the method of separation of variables. The formulation is carried out by expanding the incident as well as the scattered electromagnetic fields in terms of appropriate angular and radial Mathieu functions and a set of expansion coefficients. The incident field expansion coefficients are known, but the scattered field expansion coefficients are unknown. Imposing the boundary conditions at the surface of the elliptic cylinder leads to the determination of the unknown expansion coefficients in closed form. Results are presented as normalized scattering widths for elliptic cylinders of different sizes and PEMC admittances, to show the effects of these on scattering.
2009-07-24
PIER Letters
Vol. 10, 49-57, 2009
download: 135
A Novel Monopole Dual Band-Notched Antenna with Tapered Slot for UWB Applications
Sheng Tu Yong-Chang Jiao Yue Song Bin Yang XingZheng Wang
In this article, a novel microstrip-line fed monopole dual band-notched antenna with tapered slot for UWB applications is presented. The tapered slot, making the antenna have a scissors-like shape, is taken into account to enhance the wideband characteristics. In addition, the dual notched bands, from 3.3 to 3.7 GHz and from 5.15 to 5.85 GHz, are achieved by inserting slots on the ground plane and adding circle arc stubs on the radiating patch. Details of the antenna design are described, a theoretical and experimental investigation of the antenna is given as well.
2009-07-15
PIER Letters
Vol. 10, 39-48, 2009
download: 221
Compact Wideband Bandpass Filter Using Open Slot Split Ring Resonator and CMRC
S. S. Karthikeyan Rakhesh Singh Kshetrimayum
In this paper, a compact, wide fractional bandwidth bandpass filter using a new open slot split ring resonator (OSSRR) defected ground structure and compact microstrip resonating cell (CMRC) is presented. OSSRR is the modified and dual version of the open split ring resonator (OSRR). The band pass filter (BPF) is constructed by cascading lowpass and highpass sections designed using CMRCs and OSSRR respectively. The designed BPF has wide fractional bandwidth of 74%, sharp passband to stopband transition and low passband insertion loss of less than 1 dB. The simulated results are well validated by the experimental results.
2009-07-15
PIER Letters
Vol. 10, 29-38, 2009
download: 91
A Novel Miniature Stripline Fed Antenna with Band-Notched Function for UWB Applications
Sheng Tu Yong-Chang Jiao Yue Song Zheng Zhang
A novel compact strip-line fed UWB antenna with band-notched characteristic is proposed. By employing a balanced antipodal structure and strip-line feed, the size of this antenna has been reduced to only 23 mm×27.5 mm with the dielectric substrate of relative permittivity 2.65. Meanwhile, a slot is added onto the radiating patch of the mid metalisation layer to realize the band-notched function, by tuning the length of which suitable rejected frequency band can be obtained. According to the measured results, the proposed antenna has a large bandwidth totally satisfying the requirement of UWB applications (3.1~10.6 GHz) with good stable omnidirectional radiation patterns and gains except in the rejected frequency band (4.9~6.2 GHz). Details of this antenna are described, and the experimental results of the constructed prototype are given, too.
2009-07-15
PIER Letters
Vol. 10, 19-28, 2009
download: 104
Complementary Split Ring Resonators with Dual Mesh-Shaped Couplings and Defected Ground Structures for Wide Pass-Band and Stop-Band BPF Design
Ji-Chyun Liu Hsieh-Chih Lin Bing-Hao Zeng
Novel configurations of complementary split ring resonator (CSRR) with dual mesh-shaped couplings and defected ground structures (DGS) are introduced to design the high performance of wide pass-band and stop-band band pass filters (BPF). This paper presents a low insertion loss (-0.82 dB), symmetry and sharper transmission zero level (-51.88 dB), using effective DGS and alternative coupling for CSRR. The filter with center frequency at 1.92 GHz, pass-band from 1.21 GHz to 3.05 GHz (BW = 95.8%) and wider stop-band (extended to 4.2f0 below -20 dB rejection level) is designed and fabricated. Simulation and measured results including surface current distributions and frequency responses are presented and discussed.
2009-07-14
PIER Letters
Vol. 10, 11-18, 2009
download: 805
Multi-Slotted Microstrip Patch Antenna for Wireless Communication
Mohammad Tariqul Islam Mohammed Nazmus Shakib Norbahiah Misran
A new design technique of microstrip patch antenna is presented in this paper. The proposed antenna design consists of inverted patch structure with air-filled dielectric, direct coaxial probe feed technique and the novel slotted shaped patch. The composite effect of integrating these techniques and by introducing the new multi-slotted patch, offer a low profile, high gain, broadband, and compact antenna element. A wide impedance bandwidth of 27.62% at -10 dB return loss is achieved. The maximum achievable gain is 9.41 dBi. The achievable experimental 3-dB beamwidth (HPBW) in the azimuth and elevation are 60.880 and 390 respectively at centre frequency.
2009-07-14
PIER Letters
Vol. 10, 1-10, 2009
download: 109
Dual Frequency Broadband Microstrip Antenna with a Reactive Loading and Stacked Elements
Jaume Anguera Carles Puente Carmen Borja
A dual-band enhanced-bandwidth microstrip antenna is presented with a frequency separation of f2/f1=1.33. In order to achieve the dual-frequency operation, a rectangular patch is loaded with a stub at one of its radiating edges. To improve bandwidth at each band, two parasitic patches are coupled to the driven element.