ACES Publication Search
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| Title: | ACES Journal December 2022 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1969 KB |
| Title: | ACES Journal December 2022 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 161 KB |
| Title: | ACES Journal December 2022 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 15244 KB |
| Title: | Design of Millimeter Wave Radar Antenna Array with Flat-top Pattern |
| Abstract: | In this paper, a planar millimeter wave radar array antenna with flat-top pattern is proposed for wide detection angle. Firstly, the Chebyshev synthesis method is used to design the linear array with high gain and low sidelobe pattern which works in the 24 GHz frequency band. The maximum gain of the linear array is roughly 15 dBi, and the main-sidelobe ratio is close to 20 dB. By setting the excitations and phases distribution of the planar array feeding network, a 5 × 4 antenna array with a flat-top pattern is obtained. The simulated and measured results show that the radar antenna array has a wide halfpower beamwidth of 88 degrees, which can ensure that the automotive radar has a longer detection range and a larger monitoring angle. |
| Author(s): | N. Wang, Y. Zhang, K. Gao, J. Wu, B. Dang, Z. Kong, H. Wei, F. Gao, S. Liu |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1223 KB |
| Title: | Optimal Antenna Pattern Design for the Instantaneous MIMO Channel |
| Abstract: | Due to the rapid attenuation of the millimeter wave, it is necessary to use very large-scale antenna arrays in millimeter wave communications to get ultra-high directivity which improves the transmission distance and the signal-to-noise ratio. Considering the cost of large-scale RF links, analog beamforming plays an important role in large-scale MIMO communications. This paper discusses the calculation method of the antenna pattern that best matches the instantaneous MIMO channel in analog beamforming. By giving piecewise modeling on the antenna pattern, singular value decomposition and the water-filling algorithm are used to obtain the antenna pattern and the power distribution among antennas. The optimal antenna pattern can provide the target pattern for antenna synthesis to get the maximum capacity. The simulation results show that the method is effective. |
| Author(s): | C. Zhang, S. Wang, M. Zhang, X. Liu, A. Zhang |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 605 KB |
| Title: | Isolation Improvement Using the Field-Circuit Combined Method for In-Band Full-Duplex MIMO Antenna Arrays |
| Abstract: | This paper proposes a field-circuit combined decoupling method for co-polarized in-band full-duplex multiple-input multiple-output (MIMO) antenna arrays. The proposed field-circuit combined method is composed of decoupling network and neutralization-based decoupling. An in-band full-duplex antenna with high isolation and low cross-polarization level is designed and extended to a 1 × 4 linear array. The decoupling network and ADS are applied for the array to alleviate the mutual coupling by rebuilding the neutralization wave paths in the circuit and field domains. Thus, low coupling (< ─25 dB) among the transmitting/receiving antennas and high isolation (> 47 dB) between the transmitting and receiving antennas are achieved at 2.6 GHz, exhibiting a superior decoupling performance. |
| Author(s): | Y. Da, J. Yi, J. Li, X. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 4100 KB |
| Title: | Wideband Decoupled 8-Element MIMO Mobile Phone Antenna for Sub-6GHz 5G NR Bands |
| Abstract: | A broadband decoupled dual antenna pair suitable for sub-6G mobile terminal application is proposed and designed. The multiple input multiple output (MIMO) antenna pair is arranged on the metal frame of the mobile phone, with two antenna pairs on each metal frame. The slotted antenna element structure and defect ground decoupling structure are used to achieve wide band and high isolation. Based on the decoupled antenna pair, an eight-element MIMO antenna is designed. Similarly, the coupling between antenna pairs is effectively reduced by etching the decoupled defect structure of a zigzag shape on the system surface. The prototype of the antenna array is successfully fabricated and tested. Simulation and experimental results show that the proposed eight-element MIMO antenna can fully cover the n77/n78/n79 band of 5G New Radio and 5 GHz band of WLAN. The overall efficiency of the antenna is 50%- 75%, the envelope correlation coefficient (ECC) is below 0.08, and the isolation between any two ports is better than 11 dB. |
| Author(s): | J. He, S. Zhu, J. Yu, H. Li, G. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1119 KB |
| Title: | A Simple Single-fed Left/Right-Hand Circular Polarization Antenna for GPS Applications |
| Abstract: | A simple single-feeding circular polarization (CP) antenna with controlled left/right-hand characteristics is proposed and investigated for GPS L2 band applications. To achieve the CP characteristics, four arcshaped cutting corners with different sizes are removed from a circular patch to give 90° phase difference to implement CP. By adjusting the radius of the four arcshaped cutting corners, the antenna can be controlled to get left/right-hand circular polarization (L/RHCP). The proposed CP antenna is modeled, simulated, fabricated and measured, and the results demonstrate that the antenna provides an axial ratio beamwidth over 180 MHz, and impedance bandwidth of 20 MHz for L/RHCP. Additionally, the devised CP antennas have good directional radiating patterns, making them suitable for GPS L2 band applications. |
| Author(s): | L. Meng, Y. Li, Z. Huang |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 7563 KB |
| Title: | A Novel 4 × 4 MIMO Antenna Decoupled by T-Shaped Dummy Antenna with High Robustness for 5G Mobile Devices |
| Abstract: | It is challenging to design a compact antenna pair with isolation better than 20 db and with robustness to antenna position. In this paper, a T-shaped dummy antenna is adopted to decouple the tightly arranged antenna pair for 5G mobile devices. Working in the 3.8 GHz of N77 band, the proposed antenna pair is with an impedance bandwidth of 280 MHz. Isolation of the proposed antenna pair is enhanced from 13 db to 30 db by adding the T-shaped dummy antenna, and it is with high robustness even though the antenna position is altered. The calculation process of the loading requirement of T-shaped dummy antenna is shown. By duplicating the proposed antenna pair, a 44 MIMO antenna with high isolation is proposed. The measured results show the MIMO antenna with isolation better than 31 db, and the average total efficiency is about 49%, and the Envelope Correlation Coefficient (ECC) is lower than 0.05 in the -6 db pass band. To the best of the authors’ knowledge, compared to most of the reported antenna pairs, the proposed 4 × 4 MIMO antenna is with the highest isolation while keeping a compact size. |
| Author(s): | J. Wang, X. Chen, X. Wang, M. Wei |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2665 KB |
| Title: | High-Isolated Full-Duplex Dongle Antenna Based on Even-Mode Suppression for B5G Communications |
| Abstract: | A space-shared full-duplex antenna with high isolation is proposed for universal serial bus (USB) dongles. A compact antenna with a compact size of 22 mm × 4 mm comprises a loop and dipole antennas, working as a vertical monopole and a horizontal dipole, respectively. The dipole-type is fed by a microstrip-slotline transition with filtering characteristics of odd-mode bandpass and even-mode bandstop, avoiding the even-mode excitation for the loop antenna. The inherent isolation is caused by the orthogonality of the modes and the even-mode suppression (caused by the microstrip-slotline transition). Thus, high port isolation, low envelope correlation coefficients (ECC), and high efficiency are achieved across the 5G band of 3.4-3.6 GHz. |
| Author(s): | Y. Da, X. Chen, A. Zhang, K. Wei, A. A. Kishk |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1759 KB |
| Title: | Wideband Single-Fed Circularly Polarized Stacked Patch Antenna With L-Shaped Stub |
| Abstract: | A wideband single-fed circularly polarized (CP) stacked patch antenna with an L-shaped stub is presented. The CP antenna is made up of the bottom gradient microstrip transmission line, middle driven patch and top square radiation patch. The driven patch with an Lshaped stub and opening slot can achieve a wideband CP radiation which is different from a conventional patch. The presented CP stacked patch antenna maintains good directional radiation, while featuring wideband CP radiation. The final tested results indicate that the presented CP antenna has significant performance with a –10-dB impedance bandwidth of 42.1% (4.26-6.53 GHz), a 3- dB AR bandwidth of 26.0% (4.36-5.66 GHz) and broadside peak gain of 8.6 dBic. Moreover, the fifth-generation (5G) N79 band (4.4-5.0 GHz) and 5G wireless local area network (WLAN) band (5.15-5.35 GHz) can be covered by the operating bandwidth of the presented CP antenna. |
| Author(s): | W. Li, W. Xue, Y. Li, X. Xiong, K. L. Chung, Z. Huang |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2257 KB |
| Title: | A Circularly Polarized Patch Antenna Array with Reduced Mutual Coupling Using the Aperture-Loading Decoupling Technique |
| Abstract: | An aperture-loaded decoupling strategy for 1 × 8 circularly polarized (CP) patch antenna array is presented in this article. By introducing an additional coupling path, the mutual coupling between adjacent antennas is cancelled. The result shows that more than 20- dB isolation enhancement is obtained by applying this strategy at the center frequency of 3.38 GHz. Mutual coupling between both adjacent and non-adjacent elements are suppressed to less than -25 dB. Moreover, the impedance bandwidth and axial ratio (AR) is also improved with decoupling. Compared with conventional CP antenna decoupling methods, the proposed approach has the characteristics of low profile, compact size, and low impact for the ground plane. It is shown that the AR bandwidth can be enhanced using the proposed decoupling method. |
| Author(s): | X. Cheng, B. Qian, L. Chang, J. Liu, X. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 4062 KB |
| Title: | Simultaneous Transmit and Receive Phased Array System Architecture and Prototype Comprehensive Verification |
| Abstract: | In the future multi-functional detection sensing and communication integrated systems, as well as 5G/6G systems, simultaneous transmit and receive technology, as an important key technology, is an important supporting measure to achieve the simultaneous work of different functions. Looking at the problem of strong self-interference in the simultaneous multifunction application of a phased array transceiver, this paper presents the integrated cancellation architecture and corresponding method of integrated transmission domain, RF domain and digital domain, and completes principle experiment verification of interference suppression and elimination by constructing the principle experiment system. Experimental results show that in the actual hardware system 0.5 db amplitude quantification and 6- bit phase quantization control conditions, through joint using passive and active beam transfer of the domain space optimization form, at the same time in the digital domain application of the adaptive system identification interference cancellation method for further interference cancellation, above 150 dB for interference suppression can be achieved. This research will provide a certain reference for the application of simultaneous transceiver technology in future 5G/6G phased array antenna systems. |
| Author(s): | J. Zhang, H. Wu |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 12 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1108 KB |