ACES Publication Search
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| Title: | ACES Journal March 2023 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 1967 KB |
| Title: | ACES Journal March 2023 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 187 KB |
| Title: | ACES Journal March 2023 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 13357 KB |
| Title: | Women’s History Month Special Article: Interview with “Professor Cynthia Furse” |
| Abstract: | In this article I had the pleasure of interviewing Professor Cynthia Furse. Professor Furse is not only an internationally well-known researcher in the field of computation and applied electromagnetics (EM), but also an innovator in modern teaching techniques, an entrepreneur, an academic leader, and a true mentor for many young professionals in the electromagnetics field. |
| Author(s): | S. Noghanian |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 796 KB |
| Title: | Research on the Electromagnetic Emission Along the Contact Line of Electrified Trains Passing Through Neutral Sections |
| Abstract: | To study the electromagnetic emission along a contact line when an electrified high-speed train passes through a neutral section, this paper models the transmission line of the traction network, provides a calculation method and boundary conditions for the parameters of the model, solves for the current distribution along the contact line, and calculates the electromagnetic emission of the contact line considering the antenna effect. Thus, the electromagnetic emission characteristics along the electrified railway are determined. Moreover, the actual electromagnetic emissions of a train passing through a neutral section are measured with a field test method and compared with the calculation results to verify the effectiveness of the model. |
| Author(s): | G.-H. Liu, Y. Wang, Z. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 3421 KB |
| Title: | Scanning of the Near-field Focused Beam by Changing Frequency |
| Abstract: | A new antenna array system is introduced which enables the movement of a near-field focused beam by change of frequency. The shift in the beam is achieved by using multi-wavelength transmission lines between successive elements of the array. At the designed frequency the beam is focused at the focal point. Due to the differences in the transmission line lengths feeding the antenna elements, a progressive phase change occurs between these elements. These phase differences between the elements cause a shift in the beam position. An 8×8 patch antenna array system was designed at 2.4 GHz on a microstrip to implement the proposed system. Two substrates were used: one for the patch antenna array and the other one for the feed network and transmission lines. A full-wave simulation model was used to analyze this design and demonstrate the movement of the beam. For this design, the focused beam is moved 310 mm by changing the frequency from 2.2025 GHz to 2.5750 GHz. |
| Author(s): | M. Sohail, R. Uyguroglu, A. Y. Oztoprak |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 586 KB |
| Title: | An Omnidirectional Antenna with Multi-taper Conformal Structure |
| Abstract: | In this paper, a wideband quadrangular pyramid conformal printed dipole antenna is designed, manufactured, and tested. The proposed antenna comprises four dipoles pointing in different directions and four pairs of parasitic patches. Each dipole and pair of parasitic patches are placed on one side of the pyramid. The simulated impedance bandwidth exceeds 26% (S11 ≤ –10 dB), with the conformal taper varied from 0° to 20°. Omnidirectional radiation characteristics can be realized within the working bandwidth. The prototype of the proposed antenna with 10° taper is fabricated and measured. Moreover, the results show that the operating frequency band is 2.28-3.58 GHz in the S-band. The size of the fabricated antenna is 35 × 35 mm2. The conclusion is that the simulation and test results of the 10° taper antennas are highly consistent. |
| Author(s): | Z. Jiang, Y. Sha, X. Xuan, L. Nie |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 6470 KB |
| Title: | A Differential Slot-type Dual-polarization Ultra-wideband Antenna |
| Abstract: | A differentially fed dual-polarization slotted antenna with an ultra-wide bandwidth and low cross polarization is presented in this paper. The antenna is composed of a radiation patch and a ground plane, both of which are printed on the top of the dielectric substrate. The ground is extended toward the radiation patch to form a slotted coplanar structure. In order to expand the bandwidth, a cross-shape symmetrical slotted structure is loaded into the radiation patch. Differential feed is adopted to realize 0°/90° linear polarizations and suppress the cross polarization. Simulation and measurement results show that the proposed antenna with dimensions of 0.53λ0 × 0.53λ0 × 0.0135λ0 (λ0 is the wavelength at 4 GHz) has a differential mode impedance bandwidth of 82.25% (2.27-5.56 GHz), a differential feed port isolation of higher than 28 dB, and a cross polarization level of less than –30 dB, which achieves the characteristics of ultra-wideband, high isolation, and low cross polarization level. |
| Author(s): | Z. N. Jiang, Z. X. Wang, X. F. Xuan, L. Y. Nie, Y. Jiang |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 6428 KB |
| Title: | Design of a Miniatured, Electromagnetic Quasi-Yagi Antenna with Circularly Polarized Characteristics |
| Abstract: | A novel low-profile circularly polarized (CP) quasi-Yagi antenna with a wide 3-dB axial ratio (AR) bandwidth is proposed, which generates the endfire beam by combining magnetic microstrip cavity and folded electric dipoles with a 90° phase difference. The proposed antenna includes two shorting pins, which are employed to attain wider impedance bandwidth. Then, a phase delay line is added to connects two pairs of folded dipoles and a magnetic microstrip cavity to realize righthanded circularly polarized (RHCP). After optimization, a prototype with an overall size of 1.17 × 0.91 × 0.0387λ03 is designed. Simulated results demonstrate that the final model has 18.1% (5.01-6.01 GHz) 3- dB AR bandwidth and –10 dB impedance bandwidth of 5.2% (5.67–5.97 GHz), respectively. In addition, experimental results demonstrate that the designed antenna is very applicable to the RFID system. |
| Author(s): | Y. Zhang, L. Liu, Z. Sun, X. Li, J. Che, H. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 5588 KB |
| Title: | Design and Implementation of a Wilkinson Power Divider with Integrated Band Stop Filters Based on Parallel-coupled Lines |
| Abstract: | This paper presents a technique to improve the spurious suppression performance at the second harmonic (2f0) of a Wilkinson power divider. The technique is achieved by the insertion of bandstop filters realizing with parallel-coupled lines with the characteristic impedance of 2√Z0Ω and the electrical length of λ/8 in a conventional structure. The simulated and measured results of the conventional and the proposed divider are compared at 0.9 GHz. The insertion losses (S21, S31) are less than 3.1 dB, while the return losses (S11) are less than 34.6 dB across 100% fractional bandwidth. Moreover, the proposed Wilkinson power divider achieves more than 25.5 dB suppression at 2f0. |
| Author(s): | R. Phromloungsri, S. Sonasang |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 2346 KB |
| Title: | Design and Simulation of a Slice-rail and Cylindrical for Multi-Projectile Electromagnetic Launchers |
| Abstract: | In Electromagnetic launcher (EML) research, beside reasonable L′ and high muzzle velocities, there are several key features including multi-turn launching, low field intensity in payload position, high frequency shooting, less unwanted radiation, and so on. Attaining a solution might be feasible by a different structure. In this paper we have studied unequal curved electromagnetic rail launchers (EMRLs) as slice and cylindrical multi-projectile electromagnetic launchers, and the inductance gradient (L′) of these structures has been calculated. Making multi-projectile EMRLs using a slicerail structure is much easier than other plane methods. With a cylindrical multi-projectile EMRL, higher shooting frequency is more feasibly attained and there is no limit on the number of launchers at the same time. High temperature spots which are the result of high velocity and high current density distributions end in intense destructive erosion. Decreasing intense erosion in electromagnetic launcher structures will be more economical and provide greater reliability, therefore resulting in more applications for EMLs especially commercial ones. In parallel electromagnetic launchers, these points and areas are not omissible. In cylindrical EMRLs the problem of high current density distributions and its consequent erosion is significantly decreased because of the uniform distribution of current in its symmetric structure. |
| Author(s): | S. Mozafari, M. S. Bayati |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 3 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 5453 KB |