ACES Publication Search
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| Title: | ACES Journal June 2023 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 1967 KB |
| Title: | ACES Journal June 2023 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 178 KB |
| Title: | ACES Journal June 2023 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 17167 KB |
| Title: | Improved and Easy-to-implement HFSS-MATLAB Interface without VBA Scripts: An Insightful Application to the Numerical Design of Patch Antennas |
| Abstract: | An improved and easy-to-implement HFSSMATLAB interface is presented. Because the interface is realized without the use of VBA scripts, it is easier to implement for beginners and practitioners. This advantage allows more dissemination of the code in the HFSS community. The interface is applied to the numerical design of a patch antenna, showing the capabilities it enables. Practical details about the implementation are provided, enabling the reader to implement the interface on their own. |
| Author(s): | G. Giannetti |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 316 KB |
| Title: | Mutual Coupling Compensation-based Nonuniform Fourier Transform Technique for Accurate and Efficient Pattern Evaluation and its Application to Synthesis of Aperiodic Arrays |
| Abstract: | A rapid solution for evaluating the radiation pattern of aperiodic arrays, taking into account mutual coupling, is presented in this paper. The evaluation is achieved by eliminating the anisotropy of the active element pattern of the array through the use of the mutual coupling compensation matrix (MCCM) technique, in conjunction with the non-uniform fast Fourier transform (NuFFT). In order to eliminate the impact of mutual coupling on array pattern calculation, the MCCM is utilized to convert the active element pattern (AEP) of each element into a shared uniform term and make the NuFFT technique suitable for the array pattern calculation. The proposed solution is validated by evaluating the radiation pattern of a 64-element planar aperiodic array. In addition, the proposed solution is integrated into the Particle Swarm Optimization (PSO) to realize a pattern synthesis method. Two synthesized patterns, including a pencil beam with low sidelobe level and a flat-top beam pattern, are executed to validate. Compared with several reported methods, the proposed method can improve the synthesis efficiency and maintain good accuracy simultaneously. |
| Author(s): | F. Peng, C. Liao, Y.-F. Cheng, J. Feng, S.-D. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 7167 KB |
| Title: | Planar Antenna Design on the Characteristics of Moore Fractal-based High Impedance Surface |
| Abstract: | This work presents a planar antenna with a rectangular shape designed over a Moore curve fractalshaped High Impedance Surface (HIS). The Moore fractal geometries are space-filling curves and are useful for multiband applications. The Moore curve-shaped fractal HIS is simulated up to three iterations, and performance is examined. The proposed antenna has multiband operation within the S-band, C-band, and lower X-band frequency of operation. The antenna has a peak gain of 5.08 dB, 4.69 dB, and 5.07 dB with a Moore curve fractal HIS, with iterations 1, 2, and 3 used as the ground plane. The antenna has been analyzed regarding the reflection coefficient, radiation pattern, 3-D polar plots, and surface current distribution.With Moore curve iteration 1, a shaped HIS provides a maximum bandwidth of 740 MHz with the center frequency of 10.95 GHz, 1.24 GHz with the center frequency of 10.57 GHz, and 1.09 GHz with the center frequency of 12.5 GHz with the second and third iterations, respectively |
| Author(s): | A. K. Gupta, P. S. R. Chowdary, M. V. Krishna |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 4992 KB |
| Title: | Convolutional Neural Network for Array Size Selection of a Dual-band Reconfigurable Array |
| Abstract: | A convolutional neural network (CNN) is designed and trained to partially control a dual-band, large uniform rectangular array of reconfigurable radiating elements. The CNN selects the number of active elements and switch states needed to achieve a desired beam shape. Both pattern multiplication and finite element method (FEM) are used to simulate the radiation patterns of a PIN-diode square-spiral antenna array. After training on radiation pattern images of arrays calibrated for both phase and gain imbalance and mutual coupling, the CNN achieves 97 percent validation accuracy. Then, using the resulting size and switch states, the patterns are simulated with and without mutual coupling using the pattern multiplication model and FEM, respectively. The mean beam steering and 3-dB beamwidth errors without mutual coupling are less than 5.5 degrees and up to 12.3 degrees with mutual coupling. |
| Author(s): | G. A. Harris, C. M. Stamper, M. A. Saville |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 2490 KB |
| Title: | Flat-topped Beams using Phase Compensation based on Low-profile Transmitarray |
| Abstract: | This paper proposes a method to add an additional phase compensation to conventional phased arrays to achieve flat-topped beam forming, which can convert the spherical waves emitted by common conical horn antennas into cylindrical flat-topped beams, at the same time, there is also a certain power enhancement. A centrosymmetric unit composed of four layers of F4B and metal patches is designed. By changing the value of the parameters, a 360° phase change can be achieved, and it has the advantages of small size and low-profile. To validate the design concept, a prototype of the transmitarray (TA) was designed, fabricated, and measured by calculating the phase distribution of the front. The measurement results show that the designed TA can achieve flat-topped beams at 5.2GHz, the maximum gain is 1.15dB higher than that of the horn antenna, and the flat-topped range is about ±10°. The results are in good agreement with the simulation within the test range. |
| Author(s): | H. Zhang, T. Lan, S. Zhao, Q. He, Z. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 3389 KB |
| Title: | Design and Evaluation of Ultra-broadband Metamaterial Absorber for Energy Harvesting Applications |
| Abstract: | A perfect metamaterial absorber (MMA) is designed and evaluated numerically for solar energy harvesting applications. A dielectric layer separates the top structured metallic plane and the bottom ground metallic plane that make up the MMA. The MMA structure is primarily presented in the range of 100- 1000 THz, which corresponds to 3000-300 nm in wavelength, for the efficient utilization of solar energy. The results obtained in the band 441-998 THz correspond to a visible and ultraviolet wavelength range of 680- 300 nm. It has achieved a maximum absorption rate of 99.9% at 700 THz and 99% between 500 and 800 THz, respectively. In the desired frequency bands, the structure has achieved polarization and angle-resolved behavior. The MMA-based absorber has a high absorption rate of over 90% in the broadest visible (400-700 nm) and UV (100-300 nm) spectra. Also shown are the absorption characteristics of the MMA-based solar cell in the infrared (IR) region. The band 345-440 THz, corresponding to 870-690 nm, has 75% absorption. The other IR band (240-345 THz), which corresponds to 1250-880 nm, has achieved absorption of nearly 50%. So it can be utilized for the entire visible solar spectrum, including infrared to ultraviolet. If the proposed MMAstructure were equipped with the appropriate electrical circuitry, it could be utilized for solar energy harvesting. |
| Author(s): | E. Abishek, E. Azhagar, M. Esakkimuthu, K. Arumugam |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 1556 KB |
| Title: | Narrow-band Circularly Polarized Antenna for Medical Microwave Imaging and Health Monitoring Applications |
| Abstract: | In this paper, a circularly polarized printed monopole antenna (CPPMA) is proposed for medical microwave imaging and health monitoring applications. The proposed CPPMA is optimized to operate at the Industrial, Scientific and Medical (ISM) band. A prototype of the designed antenna is fabricated and printed on the low-cost FR-4 substrate that has a compact size of 34 × 28 × 1.5 mm3. The simulated results indicate that the designed CPPMA operates between 2.425 GHz and 2.475 GHz while the measured results range between 2.32 GHz and 2.515 GHz. The designed CPPMA also reveals a circular polarization performance at 2.45 GHz (2.4386 GHz - 2.4633 GHz). The suitability of CPPMA for microwave imaging is confirmed by checking its aptitudes to detect the presence of breast tumors and brain strokes. A great detection capability is achieved for breast tumors and brain strokes of various sizes inserted at different positions with a high sensitivity to changes or anomalies in the dielectric properties of human tissues. In addition, the usefulness of the proposed CPPMA for wearable application is justified experimentally. Excellent agreement is achieved between the simulated results and the measured ones. |
| Author(s): | B. Guetaf , A. Chaabane, A. Khalfallaoui, H. Attia |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 3986 KB |
| Title: | Low-profile Circularly Polarized Conformal Antenna Array with Side Lobe Suppression for Vehicular SATCOM Applications |
| Abstract: | A circularly polarized microstrip antenna array with low side lobe levels is proposed for Vehicular Satellite Communication. The suppression of side lobe levels is accomplished by the non-uniform power distribution utilized to feed the individual patch elements. Impedance matching is ensured by the incorporation of a quarter-wave transformer via a microstrip line fed to the edge of the patch. When the proposed amplitude-weighted feed is compared to the conventional corporate feed, simulation results indicate a reduction in side lobe levels of 8.9 dB. The proposed antenna is constructed out of RT/DUROID 5880 material, which is lighter, more flexible, and less expensive than ceramic materials. The radiation characteristics of the proposed antenna are compared when the antenna is planar versus when it is made to conform to the roof of the vehicle. The measured results indicate a reflection coefficient at the resonant frequency of -31.5 dB and -27.7 dB when conformal, an impedance bandwidth of 410 MHz and 180 MHz when conformal, an axial ratio bandwidth of 140 MHz and 170 MHz when conformal, and a peak gain of 15.719 dB and 14.335 dB when conformal. The measured results validate the simulation results that this proposed antenna is appropriate for a variety of Vehicular Satellite Communication applications. |
| Author(s): | E. Abishek, R. Subramaniam, P. Ramanujam, M. Esakkimuthu |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 2183 KB |
| Title: | Unified Formulation for Evaluation and Visualization of Electric and Magnetic Fields Inside Waveguides and Cavities |
| Abstract: | The output of this research is an interactive software package developed to enhance and expedite the design of waveguides and cavity resonators through the computation and visualization of the electric and magnetic field distribution. The software features a userfriendly interface through which users can select one of seven different configurations and specify parameters of their design, such as structure dimensions, transverse electric or magnetic mode, mode numbers, operating frequency, number of points of any of the field components along the x, y, and z axis for rectangular structures, and any 2D plane angles between 0° to 360° for cylindrical structures. Both transverse and longitudinal field components can be visualized in vector, color contour or both. The software makes it easy for users to see how the changes of physical dimensions and operating frequency affect the field distribution. Moreover, the user interface allows users to select how visualizations of the field distribution are generated and displayed. Field distributions can be displayed as static images or video animations using appropriate sequencing of computed field values at different plane cuts. The software provides all necessary warning messages for invalid input parameters. Mathematical expressions of the field components used in this software were derived from the classical solution of the wave equations using the separation of variables technique in cartesian coordinates for rectangular configurations and cylindrical coordinates for all other configurations. Results obtained using this software were validated against values found in the literature for similar types of problems, and results show perfect agreement. |
| Author(s): | Z. Hasan, A. Elsherbeni |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 4961 KB |
| Title: | CMOS High Swing and Q Boosted Dual Core Voltage Controlled Oscillator for 5G New Radio Application |
| Abstract: | This paper describes a low power, low phase noise CMOS voltage controlled oscillator (VCO) with a cascoded cross-coupled pair (XCP) configuration for high data rate 5G New Radio (5G-NR) applications. The core consists of a primary auxiliary VCO built as a negative conductance circuit to improve phase noise and a secondary core with a cascoded formation to increase output voltage swing. A switched varactor array (SVA) wideband tuner is integrated for a wide bandwidth application in a low power implementation. The dual-core VCO was designed in CMOS 130 nm technology and occupies only 1.05 mm2 of space. With a supply voltage of 1.2 V, the VCO achieved a tuning range of 32.43% from 3.45 GHz to 4.47 GHz. At 3.96 GHz carrier center frequency with 1 MHz offset, the total power consumption is 0.7 mW with a corresponding phase noise (PN) of −121.25 dBc/Hz and a Figure of Merit (FoM) of 193.25 dBc/Hz. The results are validated using Cadence Spectra RF simulations. |
| Author(s): | P. Shasidharan, J. Rajendran, S. Mariappan, N. Kumar, M. Othman |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 6 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 4512 KB |