Vol. 2
Latest Volume
All Volumes
PIERM 114 [2022] PIERM 113 [2022] PIERM 112 [2022] PIERM 111 [2022] PIERM 110 [2022] PIERM 109 [2022] PIERM 108 [2022] PIERM 107 [2022] PIERM 106 [2021] PIERM 105 [2021] PIERM 104 [2021] PIERM 103 [2021] PIERM 102 [2021] PIERM 101 [2021] PIERM 100 [2021] PIERM 99 [2021] PIERM 98 [2020] PIERM 97 [2020] PIERM 96 [2020] PIERM 95 [2020] PIERM 94 [2020] PIERM 93 [2020] PIERM 92 [2020] PIERM 91 [2020] PIERM 90 [2020] PIERM 89 [2020] PIERM 88 [2020] PIERM 87 [2019] PIERM 86 [2019] PIERM 85 [2019] PIERM 84 [2019] PIERM 83 [2019] PIERM 82 [2019] PIERM 81 [2019] PIERM 80 [2019] PIERM 79 [2019] PIERM 78 [2019] PIERM 77 [2019] PIERM 76 [2018] PIERM 75 [2018] PIERM 74 [2018] PIERM 73 [2018] PIERM 72 [2018] PIERM 71 [2018] PIERM 70 [2018] PIERM 69 [2018] PIERM 68 [2018] PIERM 67 [2018] PIERM 66 [2018] PIERM 65 [2018] PIERM 64 [2018] PIERM 63 [2018] PIERM 62 [2017] PIERM 61 [2017] PIERM 60 [2017] PIERM 59 [2017] PIERM 58 [2017] PIERM 57 [2017] PIERM 56 [2017] PIERM 55 [2017] PIERM 54 [2017] PIERM 53 [2017] PIERM 52 [2016] PIERM 51 [2016] PIERM 50 [2016] PIERM 49 [2016] PIERM 48 [2016] PIERM 47 [2016] PIERM 46 [2016] PIERM 45 [2016] PIERM 44 [2015] PIERM 43 [2015] PIERM 42 [2015] PIERM 41 [2015] PIERM 40 [2014] PIERM 39 [2014] PIERM 38 [2014] PIERM 37 [2014] PIERM 36 [2014] PIERM 35 [2014] PIERM 34 [2014] PIERM 33 [2013] PIERM 32 [2013] PIERM 31 [2013] PIERM 30 [2013] PIERM 29 [2013] PIERM 28 [2013] PIERM 27 [2012] PIERM 26 [2012] PIERM 25 [2012] PIERM 24 [2012] PIERM 23 [2012] PIERM 22 [2012] PIERM 21 [2011] PIERM 20 [2011] PIERM 19 [2011] PIERM 18 [2011] PIERM 17 [2011] PIERM 16 [2011] PIERM 14 [2010] PIERM 13 [2010] PIERM 12 [2010] PIERM 11 [2010] PIERM 10 [2009] PIERM 9 [2009] PIERM 8 [2009] PIERM 7 [2009] PIERM 6 [2009] PIERM 5 [2008] PIERM 4 [2008] PIERM 3 [2008] PIERM 2 [2008] PIERM 1 [2008]
2008-06-04
PIER M
Vol. 2, 201-211, 2008
download: 103
FDTD Modeling of a Resistively Loaded Monopole for Narrow Borehole Ground Penetrating Radar
Florence Sagnard C. Fauchard
The geometryof a broadband (0.7-2 GHz) monopole antenna intended to be inserted in a narrow borehole for ground penetrating crosshole application is proposed. The monopole antenna is supposed to be designed on a printed circuit board (PCB) using the low-cost microstrip technology. Based on the FDTD approach, the modeling of the antenna surrounded byits environment has been made, and the influence of several parameters on the radiated waveforms has been studied in details. The modeling of a transmission link has also been considered. Such a studyaims at the realization of a narrow broadband antenna.
FDTD MODELING OF A RESISTIVELY LOADED MONOPOLE FOR NARROW BOREHOLE GROUND PENETRATING RADAR
2008-05-28
PIER M
Vol. 2, 189-200, 2008
download: 89
Wavelet-Based Moment Method and Wavelet-Based Moment Method and Physical Optics Use on Large Reflector Antennas
Mohamed Lashab Chemseddine Zebiri Fatiha Benabdelaziz
With the recent advent on communication and satellite industry, there is a great need for efficient Reflector antennas systems, therefore more powerful techniques are requested for analysis and design of new reflector antennas in a quick and accurate manner. This work aim first to introduce wavelet-based moment method in 3D, as a recent and powerful numerical technique, which can be applied on a large reflector antennas, also the physical optics (PO) analysis technique is well known among the designers as an asymptotic method quick and powerful, ideally to predict far field and near field pattern, may be combined with the wavelet-based moment method therefore computing time and memory space can be saved, in this issue knowing the limit of use of this asymptotic technique is worth well.
WAVELET-BASED MOMENT METHOD AND WAVELET-BASED MOMENT METHOD AND PHYSICAL OPTICS USE ON LARGE REFLECTOR ANTENNAS
2008-05-21
PIER M
Vol. 2, 167-188, 2008
download: 275
Spatial Filters for Linearly Polarized Antennas Using Free Standing Frequency Selective Surface
Asmaa Elsayed Farahat Khalid Fawzy Ahmed Hussein Nagda El-Minyawi
Free standing planar frequency selective surfaces (FSSs) are studied when utilized as spatial filters for linearly polarized antennas. The antenna spatial filter investigated in the present work is constructed up as a finite planar array of conducting strip dipoles. The electric field integral equation (EFIE) technique with the Rao-Wilton-Glison (RWG) basis functions are used to get the current distribution on the conducting strips. The current distribution and backscattered electric field due to an incident plane wave are calculated and compared to some published work. The effect of polarization on the scattered field, and the frequency response of the spatial filter are studied. To test the operation of the proposed planar FSS, a bowtie antenna is used with the FSS employed as a spatial filter. The field transmitted by the antenna and passed over a wide frequency band through the FSS is calculated. It is shown that such a free standing planar FSS can operate as a band stop filter for linearly polarized antennas. It is also shown that even when the size of the array is reduced, the FSS maintains its frequency response with a very slight change in the center frequency of the stop band. The effect of element size, spacing between the elements, and interleaving the columns of the FSS on the frequency response of the FSS are studied. The effect of the spatial filter on the antenna input impedance is studied over a wide frequency band. The radiation pattern of the bowtie is calculated in the presence of the spatial filter. It is shown that the existence of the later causes considerable reduction in the radiation pattern within the stop band of the filter.
SPATIAL FILTERS FOR LINEARLY POLARIZED ANTENNAS USING FREE STANDING FREQUENCY SELECTIVE SURFACE
2008-05-06
PIER M
Vol. 2, 153-165, 2008
download: 1000
DESIGN OF L-BAND HIGH SPEED PULSED POWER AMPLIFIER USING LDMOS FET
2008-04-26
PIER M
Vol. 2, 141-151, 2008
download: 93
A New Triple-Band CPW-Fed Monopole Antenna for WLAN and WiMAX Applications
Yao-Yao Cui Yun-Qing Sun Hong-Chun Yang Cheng-Li Ruan
A new CPW-fed antenna with triple-band is presented for simultaneously satisfying wireless local area network (WLAN) and world interoperability for microwave access (WiMAX) applications. The investigated antenna consists of a T-shaped monopole with a trapeziform ground plane and two parasitic elements to generate triple-band. The design methodology is outlined and the overall size is 32×15×1 mm3. This antenna was numerically designed using Ansoft HFSS simulation software package. The measured 10 dB bandwidth for return loss is from 2.35 to 2.71 GHz and 3.35 to 3.72 GHz and 4.9 to 6.1 GHz, covering all the 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands.
A NEW TRIPLE-BAND CPW-FED MONOPOLE ANTENNA FOR WLAN and WiMAX APPLICATIONS
2008-04-26
PIER M
Vol. 2, 131-139, 2008
download: 327
DESIGN OF A LINEAR ARRAY OF HALF WAVE PARALLEL DIPOLES USING PARTICLE SWARM OPTIMIZATION
2008-04-26
PIER M
Vol. 2, 115-130, 2008
download: 92
A SIGNAL COVERAGE MODEL FOR TWO NEIGHBORING ISLANDS OF DIFFERENT SIZE
2008-04-26
PIER M
Vol. 2, 105-114, 2008
download: 1863
The Design Technique for Coaxial Resonator Cavity Duplexer
Li-Qun Li Chang-Hong Liang Gang Li Zhe Sun
THE DESIGN TECHNIQUE FOR COAXIAL RESONATOR CAVITY DUPLEXER
2008-04-26
PIER M
Vol. 2, 93-103, 2008
download: 124
OPTICAL BANDPASS FILTER DESIGN USING SPLIT RING RESONATORS
2008-04-08
PIER M
Vol. 2, 47-56, 2008
download: 119
Application of the Energy Balance Method for Strongly Nonlinear Oscillators
Mohammad Pashaei Davoodi Ganji Mehdi Akbarzade
In this paper, He's energy balance method is applied to nonlinear oscillators. We illustrate that the energy balance is very effective and convenient and does not require linearization or small perturbation. Contrary to the conventional methods, in energy balance, only one iteration leads to high accuracy of the solutions. It is predicted that the energy balance method can be found wide application in engineering problems.
APPLICATION OF THE  ENERGY BALANCE METHOD FOR STRONGLY NONLINEAR OSCILLATORS
2008-04-08
PIER M
Vol. 2, 37-46, 2008
download: 133
A Beveled and Slot-Loaded Planar Bow-Tie Antenna for UWB Application
Jing Liu Deshuang Zhao Bing-Zhong Wang
A novel planar bow-tie aperture antenna is proposed for ultra-wide band (UWB) application in this paper. Beveling technique is employed to increase the impedance bandwidth, and slot loading is introduced to improve the impedance matching. The measured impedance bandwidth is from 2.7 to 12 GHz for S11 < -10 dB, proving the effectiveness of these two techniques. The measured radiation patterns are relatively stable almost over the entire ultra-wide band of 3.1 to 10.6 GHz with low cross-polarization levels of at least -10 dB. Moreover, the proposed antenna maintains the advantages of ease of fabrication and relatively small electrical size.
A BEVELED AND SLOT-LOADED PLANAR BOW-TIE ANTENNA FOR UWB APPLICATION
2008-04-08
PIER M
Vol. 2, 15-36, 2008
download: 102
Band Structures and Abnormal Behavior of One Dimensional Photonic Crystal Containing Negative Index Materials
Girijesh Narayan Pande Khem Thapa Sanjeev Srivastava Sant Ojha
We have studied the optical properties, band structures and group velocities, of one dimensional photonic crystal (1-D PC) containing negative index materials using translational matrix method (TMM). The 1-D PC containing negative index materials is a periodic arrangement of positive index material (PIM) and negative index material (NIM). The observed group velocity of such structure is larger than the speed of light in certain range of normalized frequency which shown abnormal behaviors. The group velocity of the PC containing negative index materials have found larger than the speed of light. The values of the group velocity become zero, negative and positive for normalized frequencies. The structure containing negative index materials can be used to trap the photons inside the PC i.e., light localization occurs without introducing the defects.
BAND STRUCTURES AND ABNORMAL BEHAVIOR OF ONE DIMENSIONAL PHOTONIC CRYSTAL CONTAINING NEGATIVE INDEX MATERIALS
2008-04-08
PIER M
Vol. 2, 1-14, 2008
download: 92
On Enhancing the Accuracy of Evaluating Green's Functions for Multilayered Media in the Near-Field Region
Alaa Abdelmageed Mourad Ibrahim
The discrete complex image method stands as one of the most efficient techniques that is able to represent the Green's functions of multilayered structures accurately in the near- and intermediate-field regions. In order to extend the validity of the method to the far region, the surface waves are extracted. Although the extraction process yields accurate results in the intermediate and far-field regions, erroneous results are observed in the near-field region. In this paper, this problem is treated by extracting the contribution of an additional number of artificial poles. Using this scheme, the discrete complex image method can provide accurate representation of Green's functions in both the near- and far-field regions.
ON ENHANCING THE ACCURACY OF EVALUATING  GREEN'S FUNCTIONS FOR MULTILAYERED MEDIA IN THE NEAR-FIELD REGION