发布求助
文献互助 智能选刊 最新文献

IEICE Communications Express最新文献

筛选
英文 中文
Reconfigurable 1-Bit Reflectarray Antennas with Varactor Diode Mounted Multi-via Mushroom-Type Structure for 5G/6G Heterogeneous Networks 5G/6G异构网络可重构1位变容二极管多通径蘑菇结构反射天线
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026SPL0013
Taisei Urakami;Kanata Okada;Tamami Maruyama;Akira Ono;Na Chen;Minoru Okada
{"title":"Reconfigurable 1-Bit Reflectarray Antennas with Varactor Diode Mounted Multi-via Mushroom-Type Structure for 5G/6G Heterogeneous Networks","authors":"Taisei Urakami;Kanata Okada;Tamami Maruyama;Akira Ono;Na Chen;Minoru Okada","doi":"10.23919/comex.2026SPL0013","DOIUrl":"https://doi.org/10.23919/comex.2026SPL0013","url":null,"abstract":"In this letter, we propose a reconfigurable 1-bit reflectarray antenna (RAA) with a novel varactor diode mounted multi-via mushroom-type (VDMM) structure for heterogeneous networks (HetNets). Specifically, its reflection phase and operating frequency band are controlled by changing a reverse bias voltage applied to a varactor diode mounted on the unit cell. Moreover, the proposed VDMM structure reduces frequency dependency in each operating frequency band by introducing multiple vias into the meta-surface. As a result, the 1-bit RAA with the proposed VDMM structure can adaptively control the reflection direction and operating frequency band.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"186-189"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11435617","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wideband Circular Polarization Selective Surface with Curl Elements for Transmitarray Antenna Applications 用于发射阵列天线的带旋度元件的宽带圆极化选择表面
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026SPL0008
Yusuke Sato;Makoto Sano
{"title":"Wideband Circular Polarization Selective Surface with Curl Elements for Transmitarray Antenna Applications","authors":"Yusuke Sato;Makoto Sano","doi":"10.23919/comex.2026SPL0008","DOIUrl":"https://doi.org/10.23919/comex.2026SPL0008","url":null,"abstract":"This letter presents a wideband circular polarization selective surface (CPSS) with curl antenna elements and its applications to transmitarray antennas. Unlike conventional CPSSs with narrowband patch antenna elements, the proposed design utilizes wideband curl antenna elements. Simulation results at 10 GHz demonstrate that the proposed curl-based CPSS operates over a wide bandwidth of 70.3%. Furthermore, a circularly polarized transmitarray (CPTA) antenna equipped with the proposed curl-based CPSS was designed and simulated. The CPTA antenna exhibits a 3-dB gain bandwidth of 47% and an aperture efficiency of 56.9%.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"178-181"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11435613","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of Distributed MIMO Spatial Multiplexing in the Sub-THz Band for Indoor Environments 室内环境下亚太赫兹频段分布式MIMO空间复用特性研究
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-04-14 DOI: 10.23919/comex.2026XBL0024
Naoki Hamada;Toshihiko Nishimura;Yasutaka Ogawa;Satoshi Suyama;Takeo Ohgane
{"title":"Characterization of Distributed MIMO Spatial Multiplexing in the Sub-THz Band for Indoor Environments","authors":"Naoki Hamada;Toshihiko Nishimura;Yasutaka Ogawa;Satoshi Suyama;Takeo Ohgane","doi":"10.23919/comex.2026XBL0024","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0024","url":null,"abstract":"In sixth-generation (6G) mobile communications, the use of the sub-terahertz band is expected to enable ultra-high data rates exceeding 100 Gbps. To achieve this, not only increased bandwidth but also improved frequency utilization efficiency through MIMO spatial multiplexing is required. However, in environments with a limited number of multipath components, the effectiveness of conventional MIMO is restricted. To address this limitation, we evaluated distributed MIMO as an extension of hybrid MIMO. The results show that, in both office and factory environments, distributed MIMO with two access points improves channel capacity by approximately 1.7 to 1.8 times compared with a single access point. These findings demonstrate that distributed MIMO effectively enhances spatial multiplexing under conditions with few multipath components.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"210-213"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11481635","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Schottky Barrier Diodes Based on ZnMgO Thin Films and Their ESD Immunity Evaluation 基于ZnMgO薄膜的肖特基势垒二极管及其ESD抗扰性评价
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-04-14 DOI: 10.23919/comex.2026XBL0026
Yoshimasa Tsujimoto;Takashi Okuda;Kensuke Kondo;Takatoshi Tojo;Naoyuki Tsukamoto
{"title":"Schottky Barrier Diodes Based on ZnMgO Thin Films and Their ESD Immunity Evaluation","authors":"Yoshimasa Tsujimoto;Takashi Okuda;Kensuke Kondo;Takatoshi Tojo;Naoyuki Tsukamoto","doi":"10.23919/comex.2026XBL0026","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0026","url":null,"abstract":"As the operating voltages of electronic circuits decrease, low-voltage protection against electrostatic-discharge pulses is increasingly required. Metal-oxide varistors are limited by grain-boundary barrier formation, making operation below 3 V difficult. Therefore, we propose a protection concept using the forward characteristics of ZnMgO-based Schottky junctions. The fabricated sample shows a 2.1 V turn-on voltage, 20 pF capacitance, and single-pulse immunity against a 2 kV (IEC 61000-4-2) contact-discharge waveform, indicating its suitability for nanosecond-scale transient protection.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"206-209"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11481637","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Long-Reach-Only Wavelength Conversion for Cost-Efficient Future Optical Networks 未来低成本光网络的长程波长转换
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-04-14 DOI: 10.23919/comex.2026XBL0023
Kana Masumoto;Tatsuya Matsukawa;Kazuki Shimada;Rie Hayashi
{"title":"Long-Reach-Only Wavelength Conversion for Cost-Efficient Future Optical Networks","authors":"Kana Masumoto;Tatsuya Matsukawa;Kazuki Shimada;Rie Hayashi","doi":"10.23919/comex.2026XBL0023","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0023","url":null,"abstract":"In optical networks, end-to-end optical connections can impose stringent wavelength-continuity constraints, which may degrade network utilization. To address this issue, optical wavelength conversion is an effective approach. We propose a scheme called “Long-Reach-Only Wavelength Conversion”, which applies wavelength conversion only to long-reach light-paths. The proposed scheme improves network utilization while reducing the number of deployed optical wavelength converters, thereby lowering the associated investment cost. This paper evaluates the effectiveness of the proposed scheme.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"235-238"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11481634","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physics-Informed Neural Network Method for Modeling Electromagnetic Beam Propagation Problems 电磁波束传播问题建模的物理信息神经网络方法
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-04-14 DOI: 10.23919/comex.2026XBL0030
Kazuhiro Fujita
{"title":"Physics-Informed Neural Network Method for Modeling Electromagnetic Beam Propagation Problems","authors":"Kazuhiro Fujita","doi":"10.23919/comex.2026XBL0030","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0030","url":null,"abstract":"A physics-informed neural network (PINN) method for modeling electromagnetic beam propagation problems is presented. A scaling formulation for the paraxial wave equation is proposed to train a deep neural network (DNN) in a unsupervised manner. As shown in a numerical example, the trained DNN can reproduce the physics of Gaussian beam propagation. The impact of initialization on the PINN training process is also exemplified. A prediction error of this method is assessed in comparison with the finite integration technique.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"223-226"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11481638","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Improving the Robustness of Phase Response Against Mechanical Sliding Operation Errors in a Reconfigurable Metasurface Reflector 提高可重构元表面反射器相位响应对机械滑动操作误差的鲁棒性
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026SPL0011
Ora Baba;Ryuji Kuse;Takeshi Fukusako;Ho-Yu Lin;Akihiro Sato;Hideki Omote
{"title":"Improving the Robustness of Phase Response Against Mechanical Sliding Operation Errors in a Reconfigurable Metasurface Reflector","authors":"Ora Baba;Ryuji Kuse;Takeshi Fukusako;Ho-Yu Lin;Akihiro Sato;Hideki Omote","doi":"10.23919/comex.2026SPL0011","DOIUrl":"https://doi.org/10.23919/comex.2026SPL0011","url":null,"abstract":"This paper presents an improved 2-bit coding metasurface reflector employing a mechanical sliding operation with enhanced robustness. The unit cell is redesigned by widening the upper-layer element and removing the parasitic element used in the conventional structure. As a result, the allowable sliding tolerance increases from ±0. 05 mm to ±0.15 mm, corresponding to a threefold improvement in robustness while maintaining a phase error of only 15°. Furthermore, a 1 × 18 reflector array is analyzed, confirming that the proposed design achieves correct reflection angle switching and exhibits scattering patterns comparable to the conventional structure.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"182-185"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11435584","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CNN-Based Receiver Design for Chirp-Based Asynchronous Pulse Code Multiple Access for Massive IoT 基于cnn的大规模物联网啁啾异步脉冲码多址接收机设计
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-04-14 DOI: 10.23919/comex.2026XBL0036
Mayu Horiuchi;Takuya Fujiwara;Ferdinand Peper;Kenji Leibnitz;Naoki Wakamiya;Maki Arai;Dae-Il Noh;Won-Joo Hwang;Jin Nakazato;Mikio Hasegawa
{"title":"CNN-Based Receiver Design for Chirp-Based Asynchronous Pulse Code Multiple Access for Massive IoT","authors":"Mayu Horiuchi;Takuya Fujiwara;Ferdinand Peper;Kenji Leibnitz;Naoki Wakamiya;Maki Arai;Dae-Il Noh;Won-Joo Hwang;Jin Nakazato;Mikio Hasegawa","doi":"10.23919/comex.2026XBL0036","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0036","url":null,"abstract":"Asynchronous Pulse Code Multiple Access (APCMA) is a wireless access scheme for massive IoT that offers strong robustness to large-scale packet transmissions by encoding information in pulse trains, as far as pulses are not lost. However, conventional threshold-based pulse detection suffers from pulse loss, false detection, and the need for careful parameter tuning, especially under low-SNR conditions. This letter proposes a machine learning (ML)-based pulse detection method for chirp spread spectrum-based APCMA. The proposed method is implemented on a GNU Radio/USRP receiver in the 920 MHz band, and its performance is evaluated in high-attenuation wired environments and large-scale wireless experiments. The results show that the proposed receiver achieves higher sensitivity without threshold tuning and yields consistently better performance than LoRa in collision-prone environments.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"214-218"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11481639","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Special Cluster on Antennas and Propagation Technologies in Conjunction with Main Topics of ISAP2025 结合ISAP2025主要议题的天线和传播技术特别集群
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-06-15 DOI: 10.23919/comex.2026SPF0001
{"title":"Special Cluster on Antennas and Propagation Technologies in Conjunction with Main Topics of ISAP2025","authors":"","doi":"10.23919/comex.2026SPF0001","DOIUrl":"https://doi.org/10.23919/comex.2026SPF0001","url":null,"abstract":"The 2025 International Symposium on Antennas and Propagation (ISAP2025), held in Fukuoka, Japan during October 27–31, 2025, was a great success. By taking this opportunity, the special section has been planned to publish letters in cluster fashion, which aims to raise the interest of researchers in the field of antennas, propagation and the related topics. The objective of this Special Section is to discuss the antennas and propagation technologies related to advancing technologies for 6G mobile communication systems, MIMO, PAN/BAN, and wireless power transmission, and so forth. The topics also include electromagnetic wave theory and its related topics including emerging topics for metamaterial, nano-electromagnetics, and their antenna applications.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"168-168"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11568115","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Study on a Quasi-Isotropic Planar Antenna Using Characteristic Mode Analysis 准各向同性平面天线特性模态分析研究
IF 0.7
IEICE Communications Express Pub Date : 2026-06-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026XBL0013
Kazuki Ban;Hirayama Hiroshi
{"title":"A Study on a Quasi-Isotropic Planar Antenna Using Characteristic Mode Analysis","authors":"Kazuki Ban;Hirayama Hiroshi","doi":"10.23919/comex.2026XBL0013","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0013","url":null,"abstract":"This paper investigates the radiation characteristics of a quasi-isotropic small planar antenna using CMA (characteristic mode analysis). In recent years, sensor devices have been used in various fields, but the difficulty of replacing the batteries of devices has become an issue. Energy-harvesting antennas are one solution to this problem, and such antennas require quasi-isotropic properties. The quasi-isotropic planar antenna proposed in this study had its dimensions determined through optimization, but this prevented a thorough examination of its radiation characteristics. This study performed CMA analysis on the antenna, revealing for the first time that quasi-isotropy is achieved when two characteristic modes complement each other's insensitivity directions. Furthermore, parameter studies using CMA confirmed that quasi-isotropy is established when the Mode Significance (MS) difference between the two dominant modes and the radiation pattern are in equilibrium.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 6","pages":"194-197"},"PeriodicalIF":0.7,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11435590","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148433316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书