ACES Publication Search
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| Title: | ACES Journal September 2022 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1969 KB |
| Title: | ACES Journal September 2022 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 338 KB |
| Title: | ACES Journal September 2022 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 17275 KB |
| Title: | Analysis of Transmission Characteristics of EBG Structures by Subgridding Unconditionally Stable FETD Method |
| Abstract: | Subgridding unconditionally-stable finiteelement time-domain method based on spatial modes filtering (SSMF-FETD) is combined with the Floquet theorem and used to analyze the transmission characteristics of 2-D dielectric pillar-array electromagnetic bandgap (EBG) structures with cross-section shapes of square and H. The computational stress is effectively reduced by exploiting the periodicity of the EBG structure and subgridding technique. Through the spatial modes filtering (SMF) method, the subgridding FETD (S-FETD) method is developed into the SSMF-FETD with larger time steps and higher computational efficiency. The effect of geometric and electromagnetic parameters on transmission characteristics of EBG structures are analyzed and compared in detail, the conclusions are as follows: the optimal filling ratio of the dielectric squarepillar EBG structure is 0.5, the composite H-pillar EBG structure has multiple bandgaps and can effectively save metal materials while satisfying the design requirements. The effect of electromagnetic parameters can be uniformly analyzed from the perspective of the average relative permittivity; with its increase, the central frequency of the bandgap becomes lower. It should be noted that the bandgap distribution and variation of composite H-pillar EBG structure are related to how its dielectric parameters change and combine. The results can serve as a reference for similar structures design. |
| Author(s): | Y. Wang, B. Wei, K. Fan |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 4081 KB |
| Title: | A New Approach of Applying Chebyshev Distribution of Series Fed Microstrip Antenna Array for Radar Applications |
| Abstract: | In this paper a new method of applying Chebyshev distribution for series fed antenna array was proposed for radar applications. The first part of this study consists of applying the proposed method on antenna arrays working at 2.3 GHz (S-band radar applications) with 6, 8, 10, 14, and 28 elements, whereas the second part of the study is applying the method on antenna arrays working at 5.2 GHz (C-band radar applications) with the same number of elements. The achieved sidelob level is around (19.6- 24 dB).The obtained antenna gain is around (10-17.4 dB) depending on the number of elements. Whereas the horizontal half-power beam width is around (7° – 20°). |
| Author(s): | M. S. Salim, T. A. Najm, Q. H. Sultan, A. M. Saleh |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1349 KB |
| Title: | Reduction of Random Variables in EMC Uncertainty Simulation Model |
| Abstract: | To improve the reliability of simulation results, uncertainty analysis methods were developed in the Electromagnetic Compatibility (EMC) field. Random variables are used to describe random events. The more random variables you have, the less efficient the simulation is. Therefore, many high-accuracy methods have the problem of dimensional disaster, which means the calculation efficiency decreases exponentially with the increase of the number of random variables. A random variable reduction strategy based on sensitivity analysis method is proposed in this paper, so as to improve the computational efficiency of the global uncertainty analysis method. |
| Author(s): | J. Bai, Y. Wan, M. Li, G. Zhang, X. He |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 3046 KB |
| Title: | Parametric Modeling and Optimization of Switched Reluctance Motor for EV |
| Abstract: | To meet the high- performance requirements of new energy vehicle drive, the optimization design of 8/6 Switched Reluctance Motor is realized based on finite element parametric modeling of the motor. Firstly, the initial design of motor structure parameters is carried out based on the mathematical model of Switched Reluctance Motor, and the simulation model of the motor is built using RMxprt platform, and the debugging of the characteristics of the wide speed range of the motor is finished. Then, the parametric finite element model of the motor is generated, and the stator and rotor pole arc coefficients of the motor are selected as the optimization variables, and the multi-objective compromise optimization of the torque characteristics and efficiency of the motor is carried out by using the Quasi- Newton method weighting method. Finally, the magnetic field distribution, torque characteristics, efficiency and speed range characteristics before and after optimization are compared, proving that the optimized Switch Reluctance Motor can achieve multi-objective performance optimization. The motor designed by this modeling optimization method can improve the requirements of vehicle driving better. |
| Author(s): | L. Liu, Y. Huang, M. Zhao, Y. Ruan |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1262 KB |
| Title: | Design of aWideband CPW Fed Fractal Antenna for Satellite Communication |
| Abstract: | A novel ‘T’ square wideband fractal antenna is proposed for satellite communication. The Wideband is achieved through the ‘T’ square fractal design and CPW feed. At first, a conventional square-shaped patch antenna is designed. Then the square-shaped patch is replaced by a Type-I fractal to achieve wideband. Finally, a Type-II fractal with an L-Shaped boundary is used to enhance the bandwidth to a greater extent. The gain of the proposed antenna ranges from 4 dB to 6.3 dB for the entire frequency range of 6.2 GHz to 14 GHz. The radiation efficiency of the antenna is noticed up to 84%. The fractal antenna resonates well throughout the entire frequency range with a VSWR of less than 2. The antenna having such a wide band characteristic can be found suitable for a wide range of applications like earth exploration satellites, fixed satellites, radiolocation, maritime radio navigation, and aeronautical radio navigation. A metal reflector is also introduced at the bottom of the antenna to produce a unidirectional radiation pattern. This increases the gain up to 9.8 dBi and a front-to-back ratio is noticed above 20 dB. The design is fabricated and the measurement results are found to be in good agreement with the simulation results. |
| Author(s): | V. Nanthagopal, J. Paramasivam |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 4733 KB |
| Title: | Decoupling Technique Based on Field Distribution on Ground Plane for WLAN MIMO Antenna Applications |
| Abstract: | An efficiently-decoupling method for multiple-input multiple-output (MIMO) antenna systems is proposed in this paper. A planar-modified monopole antenna operating at the WLAN band is chosen as the antenna unit. The antenna structure is based on the printed circuit board technique. By observing and analyzing the ground plane’s field distribution generated by high-order modes, it is found that several stable minimum current points can be excited along the edges of the ground plane. In doing so, a high isolation can be obtained if the other antenna is placed at one of these points. The measured results and simulated results have a good agreement with each other, which well validates the proposed design concept. In addition, compared with the traditional decoupling technology, this method can improve the isolation between antennas without adding additional structures, which has excellent practicality in wireless communication system applications. |
| Author(s): | Z. Zhou, X.-Y. Ma, Z.-Y. Pang, G.-L. Huang, R.-S. Chen, C. Gu |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 11715 KB |
| Title: | Bandwidth Enhancement of Slot Antenna Using Fractal Shaped Isosceles for UWB Applications |
| Abstract: | In this paper, a coplanar waveguide (CPW) fed slot antenna using fractal shaped isosceles trapezoidal corrugations is designed and presented for Ultra- Wideband (UWB) applications. The proposed antenna is formed by a regular hexagonal patch fed through a CPW feed line and radiates amidst a notched wide hexagonal slot. The edge of the wide slot is shaped by a fractal structure that is formed by five trapezoidal notches. The antenna is printed on RO4350B substrate having a compact size of 0.305λ0 × 0.313λ0 × 0.012λ0 at 2.35 GHz. Good agreement is registered between the experimental results of the fabricated prototype and the calculated ones. By using an Agilent 8722ES vector network analyzer, the fabricated prototype confirms that the antenna has an excellent matching impedance over the bandwidth 2.35-10.65 GHz (127%) which covers the entire UWB band. Furthermore, good radiation performances are measured in an anechoic chamber. Consistent radiation patterns with a reasonable peak gain are measured over the entire working bandwidth. Therefore, the designed structure may be worthy considered for different wireless communications systems. |
| Author(s): | D. Aissaoui, A. Chaabane, N. Boukli-Hacene, T. A. Denidni |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1636 KB |
| Title: | On the Coupling Imbalance of the UWB BLC in the 5G Low Noise Amplifier Design |
| Abstract: | In this article, the design and the development of ultra-wideband UWB branch-line couplers BLCs with a novel method to control the coupling imbalance is proposed. The proposed UWB BLC is suitable for the 5G low-noise amplifier (LNA) design. UWB 4-branch BLC is designed using design curves developed using even and odd mode analyses to cover the 5G (3.3-5 GHz) frequency bands. The vertical branches of the UWB BLC are replaced by modified ones, and their effect on the coupling imbalance is investigated. The proposed BLC occupies an area of 33.9×15.7 mm2. Both conventional and modified BLC are fabricated, and their measured Sparameters are compared with analytical and simulated models. Based on the balanced amplifier topology, a 5G UWB low-noise amplifier is designed. The proposed BLCs and the MGF3022AM InGaP-HBT (Heterojunction Bipolar Transistor) are used to produce acceptable UWB performance. The balanced amplifier return loss, noise figure, and gain are investigated as BLCs coupling imbalance varies. The ultra-wideband LNA exhibits an acceptable small-signal gain, noise figure, input return loss, and output return loss across the 5G different frequency bands. |
| Author(s): | T. G. Abouelnaga, E. A. Abdallah |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 3545 KB |
| Title: | A Novel Compact Filtering Antenna for 5.0-GHz WLAN Communication System |
| Abstract: | The proposed antenna presents a microstrip filter antenna with both filter out-of-band rejection characteristics and antenna radiation characteristics for WLAN communication system. The antenna consists of four U-shaped microstrip resonators, one Γ-shaped antenna, and one parallel coupling line. The Γ-shaped antenna has the filtering function as the last order resonator, and the parallel coupling line integrates the filter and antenna as the conductance converter. After simulation and test, the results show that the center frequency of the filter antenna is 5.25 GHz, the fractional bandwidth is 8.0% (5.0 − 5.42 GHz), the in-band gain changes smoothly, the maximum in-band gain is 3.059 dBi, the gain at 150 MHz outside the passband rapidly decreases to 10.0 dBi, and the overall out-of-band gain drops to below −24 dBi. The filter antenna has a simple structure and thin substrate, which optimizes the overall size of the filter and antenna, reduces the transmission loss between them, and is applicable to the RF front-end of wireless communication systems. |
| Author(s): | S. Yan, C. Zhang, Q. Chen, M. S. Tong |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 13785 KB |
| Title: | A Novel Comb-line Leaky-wave Antenna for 77 GHz FMCW Automotive Radar System and Comparison with Buttler Beamformers |
| Abstract: | For a typical frequency modulated continuous wave automotive radar system, a design using a novel leaky-wave antenna is proposed that has a simple, cheap and easy manufacturing structure whose performance is compared with two different antenna arrays. The software used were MATLAB and CST Microwave Studio. The first antenna system was an inset-fed patch array, and the second antenna system was a circular patch array with a Buttler beamforming network as a beam scanning mechanism. The simulation results of the three proposed designs are obtained using the range-Doppler method for multi-target scenarios. The proposed leaky-wave antenna excels the antenna arrays, which offer cheaper and simpler solutions for the automotive industry. |
| Author(s): | M. Sarabi, W. F. Perger |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 9 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 4681 KB |