ACES Publication Search
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| Title: | ACES Express Journal August 2019 Cover |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 2170 KB |
| Title: | ACES Express Journal August 2019 Front/Back Matter |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1319 KB |
| Title: | ACES Express Journal August 2019 Full |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 20336 KB |
| Title: | Forecasting of Electromagnetic Radiation Time Series: An Empirical Comparative Approach |
| Abstract: | This study compares the performance of time series models for forecasting electromagnetic radiation levels at Yesilce neighborhood in Mus, Turkey. To make successful predictions using EMF time series, which is obtained in the 36-month measurement process using the calibrated Wavecontrol SMP2 device, nine different models were used. In addition to Mean, Naive, Seasonal Naïve, Drift, STLF and TBATS standard models, more advanced ANN models such as NNETAR, MLP and ELM used in the R software environment for forecasting. In order to determine the accuracy of the models used in the EMF time series used in the study, mean absolute error (MAE), relative mean absolute error (RMAE) metrics were used. The best results obtained with NNETAR, Seasonal Naïve, MLP, STLF, TBATS, and ELM models, respectively. |
| Author(s): | Z. Pala, I. H. Unluk, E. Yaldiz |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1449 KB |
| Title: | Design of Metal Mesh THz Filters Exploiting Adjoint Sensitivity Analysis |
| Abstract: | We introduce a novel approach for tuning the bandwidth of metal mesh THz filters. Our approach utilizes the adjoint sensitivity with respect to userdefined shape control parameters. Derivative-based optimization is exploited to evolve the initial template of the filter to a new design which satisfies the design specifications. We suggest a smoothing step for the sharp metallic edges that can be implemented in the final structure. Examples are presented to illustrate the efficiency of the technique in tuning the filter’s bandwidth. |
| Author(s): | A. Y. Elsharabasy, M. H. Bakr, M. J. Deen |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1580 KB |
| Title: | A High Density 16-bit Polarization-Independent Chipless Passive RFID Tag |
| Abstract: | A compact, polarization-independent, chipless, passive Radio Frequency Identification (RFID) tag with 16 bits binary encoding is presented in this paper. The design is prepared with the placement of 16 Convoluted Square Loops (CSLs), in a nested loop arrangement. The proposed CSL structure is formed by inwards semicircular bending of each edge of a square geometry. This configuration not only offers high Quality (Q) factor for each resonance but also polarization independence. The design is fabricated on a 1.6 mm thick FR-4 substrate having an area of 20.8 mm × 10.8 mm. The presented design occupies small area with the bit density of 7.12 bits/cm2 and requires no unit cell repetition for enhancing the Q factor. The tag is tested on the frequency range of 2 to 26 GHz with various E-field polarizations, in order to achieve a polarization independent behavior. |
| Author(s): | A. N. Khan, S. M. Chaudhry, R. Saleem, M. F. Shafique, S. Rehman |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1313 KB |
| Title: | Rotated Stacked Yagi Antenna with Circular Polarization for IoT Applications |
| Abstract: | This letter proposes a rotated stacked Yagi antenna with high directivity and circular polarization. The proposed antenna consists of three elements with a rotation angle and different lengths: a director, a reflector, and a driven element connected to the coaxial feeder. The coaxial feeding is connected to the driven element of the proposed antenna via a LC-balun, and the others are coupled with the driven element. Each stacked element with different lengths is equally rotated at an angle of 60° with respect to the lower element so that the dipole array antenna forms a high directive circular polarization. The size of the proposed antenna is 0.49λ0, × 0.49λ0, × 0.17λ0, at 2.45 GHz and achieved a 10 dB impedance bandwidth of 6.3%, a 3 dB axial ratio bandwidth of 8%, and a peak gain of 4.3 dBic. |
| Author(s): | J.-H. Kim, C.-H. Jeong, W.-S. Lee |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1577 KB |
| Title: | Gain Enhancement of Microstrip Patch Antenna Using Metamaterial Superstrate |
| Abstract: | In this work, a gain enhancement of conventional microstrip patch antenna has been treated for WLAN applications. About 1.3dB gain enhancement, compared to a conventional patch, has been achieved by loading the microstrip patch with a metamaterial superstrate composed of 2x3 array of Square Split Ring Resonator. Simulations have been carried out using Ansys HFSS. Measured results have been taken to validate the simulation result. |
| Author(s): | V. H. Ramegowda, G. M. Achutha, Paramesha |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1301 KB |
| Title: | Dielectric Resonator Antenna Based Dual Port Multiple Input Multiple Output Antenna |
| Abstract: | This paper presents a Dielectric Resonator based dual frequency band Multiple Input and Multiple Output (MIMO) antenna for wireless communication. This antenna is designed for WLAN (5.5─5.8 GHz) and X─band (8─8.1 GHz) applications. A pair of DRAs is placed on a FR-4 substrate and is excited through microstrip feed lines placed on rear side of substrate. A via-less EBG structure is introduced to suppress the mutual coupling among DRAs. The measured isolation among the two antenna ports is 25 dB and 41 dB for 5.6 GHz and 8.05 GHz respectively. The overall dimension of the antenna is 0.72 λ0 × 0.52 λ0 at lower resonant frequency. Simulated and measured results are in good agreement, which supports the potential application of the proposed antenna for high gain WLAN and X─band applications. |
| Author(s): | M. Z. Hameed, S. Majeed, R. Saleem, M. F. Shafique, S. Rehman |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1571 KB |
| Title: | Compact Quad Element UWB-MIMO Antenna with Electronically Reconfigurable WiMAX Band-Stop Capability |
| Abstract: | Miniaturized four port multiple-input multiple-output (MIMO) antenna with electronically reconfigurable WiMAX band-stop capability is proposed for ultra-wideband (UWB) application. The elements of MIMO antenna system exhibit good impedance match (VSWR ≤ 2), while offering high ports isolation (S12 ≤ -20 dB) over the whole ultra-wideband spectrum. Moreover, reconfigurable band-notch capability at WiMAX (3.2-3.8 GHz) frequency band is achieved by switching the PIN diode to ‘ON’ state. The antenna is fabricated and measured as well, and the results suggest that the proposed antenna design with switchable WiMAX band-notch characteristics is a suitable candidate for UWB-MIMO applications. |
| Author(s): | A. Quddus, R. Saleem, M. F. Shafique, S. Rehman |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1398 KB |
| Title: | MACA Algorithm to Accelerate Modeling of Eddy Current Position Sensor |
| Abstract: | In this paper, we proposed a Modified Adaptive Cross Approximation (MACA) algorithm method to model an eddy current probe used as position sensor in Nondestructive Evaluation (NDE). Eddy current based position sensor can be used when optical aids cannot to guide the position of the coil. We use surface integral equation technique with selected Stratton-Chu formulation and apply MACA algorithm to accelerate the calculation of impedance change for the position sensor. Good performance of proposed method is demonstrated with numerical examples. |
| Author(s): | Y. Bao, Z. Liu, J. Song |
| File Type: | Express Journal Paper |
| Issue: | Volume: 34 Number: 8 Year: 2019 |
| Download Link: | Click here to download PDF File Size: 1285 KB |