ACES Publication Search
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| Title: | ACES Journal October 2023 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 1970 KB |
| Title: | ACES Journal October 2023 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 227 KB |
| Title: | ACES Journal October 2023 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 0 KB |
| Title: | Compact Integrated Circular Polarization Filtering Antenna based on SIW |
| Abstract: | In this paper, a compact integrated circular polarization filtering antenna is proposed based on substrate integrated waveguide (SIW) cavity. Firstly, a dual-mode (TE102 and TE201 modes) rectangular cavity is utilized as a common feeding cavity to achieve a dual-mode filtering response. And then, an additional rectangular patch with a slot is coupled from the feeding cavity for circular polarization radiation. To verify the proposed concept, a prototype circular polarization filtering antenna is simulated. The circular polarized filtering antenna resonates at 4.225 GHz with a low cross-polarization and a high gain of 7.23 dBi. |
| Author(s): | Q. Gao, Y. Zhu, X. Yang, R. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 12036 KB |
| Title: | Compact Series-fed Circularly-polarized Patch Array based on Microstrip Line |
| Abstract: | A compact single-layer circularly polarized (CP) antenna array is proposed in this paper for 5G/6G applications. The conventional microstrip line is modified as a feeding network by periodically and alternatively loading field blocking stubs, producing a linearly polarized in-phase radiative field aperture. By adding CP corner-truncated patches beside these in-phase fields, a linear high-gain CP antenna array excited by a single feed is obtained. The feasibility of the proposed design is demonstrated through the fabrication and measurement of a 16-element linear array. The results indicate that the 3 dB axial ratio bandwidth is 3.5% (19.60∼20.30 GHz), the -10 dB impedance bandwidth totally covers the 3 dB axial ratio bandwidth, and the peak realized gain is 14.9 dBi under an antenna length of 5.69λ0. This proposed strategy provides a very compact antenna structure to achieve high-gain CP radiation without the requirement of impedance transformers, phase shifters, and open-stop-band suppressing measures. Moreover, the antenna has a per-unit-length CP gain of 5.5/λ0, which is superior to many single-layer high-gain CP antennas. |
| Author(s): | G. Wei, L. Chang, Y. Wu |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 979 KB |
| Title: | Low-profile Dual-polarized Filtering Antenna with Improved Gain and Impedance Bandwidth using Characteristic Mode Analysis |
| Abstract: | A low-profile dual-polarized filtering microstrip patch antenna (MPA) with improved gain and bandwidth is realized without requirement of filtering circuit. Herein, the characteristic mode analysis (CMA) method is adopted to analyze the antenna performances. Initially, the resonant modes of the MPA are deeply analyzed, which indicates that its resonant frequencies of CM1 and CM3 could be moved close to each other by loading slots and shorting pins, thus broadening the impedance bandwidth. Then, the influence of the slots on radiation patterns of the antenna is further studied. The results demonstrate that the non-broadside radiation beam of its CM1 could be reshaped as the broadside beam, and the sidelobe level of its CM3 could be reduced by cutting the slots, leading to the improved gain. After that, the effect of the pins on the gain-response is investigated, It shows that the gain nulls of the MPA could be controlled at both lower and upper bands, especially for the non-filtering scheme. Finally, the proposed dual-polarized antenna is fabricated and tested. The results prove that its impedance bandwidth reaches to about 7.4% with a low-profile of about 0.038 free-space wavelength. Besides, a stable enhanced gain of around 10 dBi is achieved over the operating band. |
| Author(s): | Z.-Z. Wang, N.-W. Liu, L. Fang |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 5996 KB |
| Title: | Wideband Center-fed Stacked Patch Circularly Polarized Antenna used in Phased Array |
| Abstract: | A center-fed circularly polarized stacked patch antenna (CF-CPSPA) with enhanced axial-ratio (AR) bandwidth is proposed in this paper. The antenna is composed of two microstrip patches, the lower patch consists of a circular pad, an elliptical-ring, and two branch lines connecting them, which is used to realize the center-fed condition, and the upper patch is an elliptical patch to achieve the wide band performance. Firstly, two center-fed linearly polarized stacked patch antennas with wide band are designed, one mode radiated with x polarization, and the other generates y polarized radiation. Next, the orthogonal modes of two linearly polarized antennas are combined together by a specific design. Finally, the approximate equal amplitude and quadrature phase difference of the introduced modes are achieved in the operating frequency band with proper parameters analysis. And the impedance bandwidth and 3dB AR bandwidth is improved to 30.4% and 16.5%. |
| Author(s): | J. Wang, X. Liu, P. Zhang, Z. Xu, A. Li, Z. Chen, J. Fan |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 4563 KB |
| Title: | Miniaturized Wideband Circularly Polarized Triangular Patch Antennas based on Characteristic Mode Analysis |
| Abstract: | A miniaturized, wideband circularly polarized (CP) antenna based on coupled triangular patches is presented. Initially, two identical triangular patches with shorting pins are placed close to each other in a perpendicular orientation. Hence, a pair of orthogonal modes can be produced based on the coupled resonators. Under the characteristic mode analysis (CMA), it can be found that the 90◦ phase difference is achieved by modulating gap distance and shorting pins numbers. Both the shape of triangle patches and shorting pins contribute to the miniaturization. To further improve the AR bandwidth, a third patch is added to form a new mode. Thanks to the triple modes produced by the three patch elements, two AR minima are constructed to broaden the AR bandwidth. With this compact arrangement and shorting pins, a miniaturized wideband CP patch antenna with a 5.2% AR bandwidth is successfully implemented. The overall size of the antenna is merely 0.34λ0×0.33λ0×0.046λ0. |
| Author(s): | T.-L. Yang, X. Zhang, Q.-S. Wu, T. Yuan |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 6449 KB |
| Title: | A Low-profile Dual-band Dual-polarization Co-aperture Array Antenna with High Isolation |
| Abstract: | This paper proposes a low-profile highisolation dual-polarization array antenna operating in the L/S band. The radiating unit of the array antenna adopts U-shaped bending dipoles to realize the staggered arrangement of high- and low-band units, and is connected to the feeding network by a coaxial cable. To achieve the non-influence of high-band and low-band feed networks, multi-layer printing technology is used and grooves are etched on the metal plate. In order to reduce the coupling of the high- and low-band dipoles at low frequency, a bandpass filter is added to the highband feed network, which greatly improves the isolation at low-frequency. The measured results show that the impedance bandwidth of the array is 4.5% (0.971-1.015 GHz) and 7.5% (1.89-2.04 GHz), with gains of 15 and 19 dBi at 1 GHz and 2 GHz, respectively. And the isolation between the dual-polarized ports more than 50 dB and 35 dB was achieved at 1 GHz and 2 GHz, respectively. The proposed array will have practical value in L/S band full-duplex wireless communication systems. |
| Author(s): | L.-X. Xia, Q. L. Zhou, N.-W. Liu, G. Fu |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 3447 KB |
| Title: | A 4-Element UWB MIMO Antenna System with High Isolation Performance |
| Abstract: | This paper proposes a 4-element multipleinput multiple-output (MIMO) antenna system, which is intended for ultra-wideband (UWB) applications. The antenna has a dimension of 92 × 70 × 1.6 mm3. It achieves element isolation via the defected ground structure (DGS) and symmetric E-shaped branch structures design. The realized operating bandwidth is from 3 GHz to 18 GHz, with 15 dB isolation within the whole wide band. The envelope correlation coefficient (ECC) is less than 0.01 with diversity gain (DG) greater than 9.95. The prototype is fabricated and measured to verify its potential applications for UWB MIMO communication. |
| Author(s): | T. Ding, H. Yang, Z. Chen, Z. Lin, B. He, C.-Z. Han |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 4469 KB |
| Title: | Rigorous Analysis and Design of Resistor-Loaded Patch Antennas with Flexible Gain for Indoor Radar Sensors |
| Abstract: | A high-precision cavity model of resistorloaded patch antenna (RLPA) with adjustable gain is proposed and rigorously studied in this article. In our analysis, the loaded resistors are perceived as controlled current sources, thus the RLPA can be solved as a modified cavity model. Accurate expressions of field distribution, input impedance, and radiation patterns are derived in this way, and a gratifying agreement has been achieved between the calculated and simulated results. Based on this approach, RLPAs for indoor motion radar are designed and analyzed. Comprehensive analysis is conducted to reveal the loading effect on radiation gain, radiation efficiency, and quality factor of RLPAs under various circumstances. Through altering the value of the loaded resistance, its radiation gain and coverage range can be flexibly adjusted. Besides, enhanced operating bandwidth and improved performance stability are also achieved due to the loaded resistors. Last but not least, several indoor motion radars based on the proposed patches are carried out and measured, which demonstrates the validity of the proposed method and design. |
| Author(s): | S.-W. Yu, X. Zhang, Q.-S. Wu, L. Zhu, T. Yuan, H.-Q. Hu |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 2950 KB |
| Title: | Four-way SIW Filtering Power Divider with In- and Out-of-phase Characteristics and Large Power Division Ratio |
| Abstract: | A novel four-way substrate integrated waveguide (SIW) filtering power divider (FPD) with in-phase and out-of-phase characteristics and a large power division ratio (PDR) is presented in this work. The frequency selection and power division functions are effectively realized by employing SIW resonators at the bottom layer and at microstrip sections at the top layer, respectively. Four microstrip lines coupled with SIW cavity through a slotline realize in-phase and two out-of-phase output characteristics and a large PDR of 7:1. To verify the design method, a four-way prototype with PDR of 7:7:1:1 is designed, fabricated, and measured. Results exhibit good filtering performance, large power division ratio, and in-phase and out-of-phase characteristics. |
| Author(s): | M. Shu, N. Huang, Q. Gao, C. Ma, X. Zhou |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 2274 KB |
| Title: | A Low-power, High-gain and Excellent Noise Figure GaN-on-SiC LNA Monolithic Microwave Integrated Circuit (MMIC) operating at Ka-band for 5G/6G Application |
| Abstract: | A 25-40 GHz monolithic low-noise amplifier (LNA) is designed and fabricated with the 100 nm gallium nitride on silicon carbide (GaN-on-SiC) technology. This four-stage-cascade monolithic LNA performs a low DC power consumption of 150 mW and noise figure of 1.6-2.2 dB. Moreover, the gain of 34-37 dB with the continuous wave of more than 2 W over 24 hours can be achieved covering the operating bandwidth. Hence, this state-of-art LNA possesses a great potential to be directly integrated with GaN power amplifiers and other microwave components to realize the high-integration, high-reliability, and high-power RF front-end. |
| Author(s): | Z. Dai, C. Li, J. Yan, T. Zhang, H. Bao |
| File Type: | Journal Paper |
| Issue: | Volume: 38 Number: 10 Year: 2023 |
| Download Link: | Click here to download PDF File Size: 3224 KB |