ACES Publication Search
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| Title: | ACES Journal October 2025 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 1968 KB |
| Title: | ACES Journal October 2025 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 50 KB |
| Title: | ACES Journal October 2025 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 102076 KB |
| Title: | Quantitative Analysis of Confidence Interval for Electromagnetic Characteristics of Hypersonic Targets |
| Abstract: | In response to the current lack of rapid and efficient techniques for uncertainty analysis in electromagnetic problems, this paper proposes an efficient uncertainty quantification method based on the finite-difference time-domain (FDTD) method. A conformal FDTD formulation integrated with polynomial chaos expansion (PCE) is comprehensively derived. For random input variables exhibiting Gaussian distribution characteristics, Hermite polynomial expansion and Galerkin testing are employed. Furthermore, by incorporating the Runge-Kutta time-stepping scheme, the method efficiently quantifies electromagnetic scattering characteristics considering stochastic variations in plasma electron density of hypersonic targets. Numerical experiments demonstrate that the proposed approach provides a reliable framework for uncertainty analysis in complex electromagnetic environments |
| Author(s): | Y. Zhu, D. Chen, H. Bao, M. Han |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 9209 KB |
| Title: | An Adaptive Multi-Objective Particle Swarm Optimization Algorithm for Excitation of Focused Phased Array in Microwave Hyperthermia Treatment Planning |
| Abstract: | A novel adaptive multi-objective particle swarm optimization (AMOPSO) is proposed to address the focus shift and redundant hotspots issues prevalent in current microwave hyperthermia treatment planning for breast cancer. By optimizing the excitation of phased array elements, more accurate beam focusing effect is achieved and the redundant hotspots are reduced, which significantly improves the treatment of breast cancer. The algorithm uses the difference between the optimized and target results as a feedback to self-constrain the algorithm, and introduces ratio of the peak power absorption (pPA) between the redundant hotspots and the target hotspot as a key objective function to reduce the number of redundant hotspots. Compared with the existing hyperthermia treatment planning (HTP) optimization algorithms, the proposed algorithm is capable of achieving precise focusing and a more substantial reduction in the number of redundant hotspots in a shorter computation time. Furthermore, the introduction of the pPA is capable of more effectively reducing the number of redundant hotspots and achieving a lower damage rate to healthy tissues. |
| Author(s): | S. Li, Y. Shen, A. Z. Elsherbeni, Y. Mao, C. Lyu |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 7999 KB |
| Title: | Application of Ground-Clump Method to Verification of Half-Space Dyadic Green’s Matrices |
| Abstract: | A simple, robust, and easy-to-implement method is considered for verification of homogenous half-space dyadic Green’s matrices (DGMs) that relate electric and magnetic fields to elementary current sources placed near an infinite ground plane. The DGMs, as a rule, are calculated using either the Sommerfeld integrals or their approximations. The verification is based on an alternative method for evaluation of DGMs, in which elementary current sources are modeled by electrically small antennas and the infinite ground plane is modeled by a finite-sized piece of ground, i.e. the ground clump. The method is demonstrated by using a typical 3-D EM solver based on the method-of-moments (MoM) solution of surface integral equations (SIEs). The single-antenna scenario is proved effective for obtaining results with controllable accuracy, with relative error going from 10−2 to 10−5, which is demonstrated for ground clumps up to 20λ in diameter. A set of three electric and three magnetic dipoles is recommended for fast verification of DGMs. |
| Author(s): | N. Basta, B. Kolundzija |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 1153 KB |
| Title: | A Broadband Metasurface for Effective Control of Transmission Phase by Applied Voltage |
| Abstract: | This paper presents a reconfigurable transmissive metasurface operating at 8.5 GHz. The metasurface consists of a four-layer stacked structure of circular radiating patches, with varactor diodes integrated into the patches to achieve 360° continuous transmission phase control. The structure exhibits a transmission loss of less than 2 dB and a relative bandwidth of approximately 12%. By tuning the capacitance of the varactor diodes, the transmission phase can be precisely and continuously adjusted. Compared to switch-diode-based metasurfaces, this approach offers a simpler design and enables dynamic continuous phase modulation. Both simulation and measurement results, including the relationship between transmission magnitude and phase shift versus bias voltage, show strong agreement. The metasurface demonstrates excellent bandwidth characteristics. This work provides a valuable strategy for designing dynamically tunable broadband metasurfaces and holds significant potential for applications in high-gain phased array antennas and efficient beamforming systems. |
| Author(s): | Z. Wang, A. K. Poddar, U. L. Rohde, M. S. Tong |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 41792 KB |
| Title: | Ultra-Wideband Frequency Selective Surface With Metal Gratings for Polarization Conversion Under Arbitrary Polarized Angles |
| Abstract: | A frequency selective surface (FSS) with metal gratings (FSSMGs) is proposed for insensitive cross polarization conversion in an ultra-wide band-width. To obtain the ultra-wide bandwidth, a multiple-resonance structure of metal gratings are selected as the sub-units. The unit of FSSMGs is composed of four grating-via-grating (GVG) modules. Each GVG module is made up of two layers of vertically arranged metal grids, quasi-wave-guiding structures (metalized vias), and shielded floors. To ensure the FSSMGs convert waves in arbitrary polarization directions, the four GVG modules in the unit are rotationally symmetric arranged. Simulated results show that the cross-polarization transmission coefficient is greater than −1 dB in an ultra-wide band of 8.17–18.5 GHz (77.5%), in which the PCR (polarization conversion ratio) and the ECR (energy conversion ratio) are greater than 90%. Meanwhile, the designed FSSMGs is insensitive for arbitrary polarized angles. In addition, the proposed FSSMGs can operate in the band 8.17–12 GHz (38.0%) and 15–18.5 GHz (20.9%) when the incident angle is less than 45°. To verify the simulated results, the proposed FSSMGs was fabricated and measured, and the measured results are in good agreement with the simulated ones. |
| Author(s): | X. Song, H. Lu, S. Yang, X.-P. Li, C. Xiong, Y.-Q. Zhang, X. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 2442 KB |
| Title: | A Novel GaN Power Amplifier Based on Quasi-Monolithic Microwave Integrated Circuits |
| Abstract: | In this paper, we propose a compact quasi-monolithic microwave integrated circuit (MMIC) ultra-wideband gallium nitride (GaN) power amplifier (PA), highlighting its innovative design approach and the associated fabrication techniques aimed at enhancing integration and performance. The discrete transistor is manufactured by a 0.35-µm GaN high electron mobility transistor (HEMT) process. The input matching network employs a GaAs passive device process for compact and wideband flexible design. The output matching network employs a ceramic technology for high power and low insertion loss design. The discrete transistor is connected to the input and output network with gold bonding wires. The PA exhibited a gain of 11 dB, a saturation power of 48 dBm, and a peak power-added efficiency of 32.8%. |
| Author(s): | L. Guo, S. Ma, H. Y. Ding, M. S. Tong |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 9502 KB |
| Title: | Dual-Polarized, Low-RCS Wideband Fabry-Pérot Antenna Utilizing a 3D-Printed Stepped Absorbing Structure |
| Abstract: | A dual-polarized Fabry-Pérot (FP) antenna with ultra-wideband radar cross section (RCS) reduction using 3D printing technology is proposed. The proposed antenna consists of a dual-polarized primary antenna and a partially reflective surface (PRS) loaded with reflective surface (RS) and 3D-printed stepped absorbing structure (3D-PSAS). The combination of the RS and the 3D-PSAS effectively reduces the RCS of the FP antenna and maintains the gain of the antenna. Meanwhile, the proposed antenna can be used in the construction of stealth systems. Both the simulated results and the measured results verify the reliability of the design. The FP antenna owns 10-dB RCS reduction bands cover 3.0~3.8 GHz and 6~15 GHz, with a peak RCS reduction of 27 dB at 12.5 GHz. In the radiation, it owns a 10-dB return-loss bandwidth of 4.64–5.64 GHz (19.4%) and 4.76–5.61 GHz (16.3%) respectively in X polarization and Y polarization modes, with a maximum realized gain of 12.4 dBi at 4.9 GHz. |
| Author(s): | Z. Lei, Z. Liu, H. Xu, H. Zhou, F. Wang, Y. Huang |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 2939 KB |
| Title: | A Wideband Single-Fed Circularly Polarized Eight-Arm Archimedean-Spiral Image-Dielectric Antenna |
| Abstract: | A wideband single-fed circularly polarized (CP) eight-arm Archimedean-spiral image-dielectric antenna (ASIDA) is proposed in this paper. The ASIDA consists of eight Archimedean-spiral dielectric arms with equal angular spacing. The eight Archimedean-spiral image-dielectric arms are excited by the unequal-length cross-slot and microstrip. The unequal-length cross-slot can generate the CP electric field to excite the dielectric arms for the wideband CP radiation. The image-dielectric waveguide line is employed to achieve a low-profile structure. The measured results show that the proposed ASIDA has an impedance bandwidth of 40.8% (1.54–2.33 GHz) and an axial ratio (AR) bandwidth of 39.8% (1.55–2.32 GHz), with a maximum realized gain of 12.2 dBic. This work will provide a new insight into the CP dielectric antenna. |
| Author(s): | D. Chen, G.i Xu, Y. Luo, W. Wang, D. Ding, L. Zhao, Y. Li, Z. Huang, X. Wu |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 32884 KB |
| Title: | A Low Cost, Wideband, Microstrip Patch Antenna Array With Improved Gain for Millimeter-Wave Applications |
| Abstract: | In this paper the design and analysis of a low cost, wideband and high gain 2×2 elements patch antenna array for millimeter-wave (mmWave) applications is presented. The proposed antenna array has been designed and fabricated using the cost-effective F4B substrate which is an economical and a suitable option for high frequency communication applications. The final geometry of the unit cell contains a slotted octagonal ring on the outside and a small parasitic octagonal ring on the inner side, connected by crossed-shape strip lines. A prototype of the proposed antenna element and array has been fabricated, which demonstrates a good agreement between the simulated and measured results. According to −10 dB matching bandwidth criteria, the proposed antenna array operates at frequency range 23.8–29.0 GHz, achieving a maximum gain of approximately 13.5 dBi and efficiency range 83–91% at its operating frequencies. The high performance of the proposed antenna array compared to the existing designs along with its simple design and cost-effectiveness demonstrate its potential for high data rate mmWave wireless communication applications. |
| Author(s): | Z. Khan, C. Zhang, S. U. Rahman, X.-C. Wang, L. Wen, W.-Z. Lu |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 1884 KB |
| Title: | Dual-Beam Series-Fed MIMO Antenna With Metasurface Loading for 5G Sub-6 GHz Access Point Applications |
| Abstract: | This article presents a compact series-fed MIMO antenna integrated with metamaterial structures, designed for 5G sub-6 GHz applications. The design employs a Substrate Integrated Waveguide (SIW)-based power divider operating at 3 GHz, offering a wide bandwidth from 3 to 5 GHz. A series-fed dipole structure is realized by connecting four dipoles of varying lengths and spacing using a microstrip line, arranged symmetrically on both sides of the SIW divider. A square-ring metamaterial array is placed along the y-axis in front of the radiating elements to enhance performance. This configuration boosts the gain significantly, achieving values between 5 and 11 dB across 2.4 to 6.5 GHz, without increasing the antenna size or compromising efficiency. The metamaterial also improves polarization characteristics, reducing cross-polarization over the entire band. MIMO capability is achieved by placing two metamaterial-loaded radiators side by side, with an Electromagnetic Band Gap (EBG) structure on the ground plane to suppress mutual coupling. The proposed design is evaluated using key MIMO performance metrics, including mutual coupling, diversity gain (DG), envelope correlation coefficient (ECC), mean effective gain (MEG), and total active reflection coefficient (TARC), demonstrating its suitability for next-generation wireless systems. |
| Author(s): | R. Anandan, V. Vinoth Kumar, M. Pandi Maharajan, G. Jothi |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 10 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 17735 KB |