Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993551
Haruki Otomo, T. Hikage, M. Yamamoto, K. Sakamoto, Y. Fujino
In order to realize earth sensing platform via low earth orbit (LEO) satellite, this paper presents a design of L-probe fed miniaturized patch antenna with two operating frequencies in 860MHz/920MHz bands. Characteristics of the designed antenna is evaluated by performing the electromagnetic simulation based on the finite element method (FEM).
{"title":"A Design of L-probe Fed Miniaturized Patch Antenna for Earth Sensing Platform via LEO Satellite","authors":"Haruki Otomo, T. Hikage, M. Yamamoto, K. Sakamoto, Y. Fujino","doi":"10.1109/iWEM52897.2022.9993551","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993551","url":null,"abstract":"In order to realize earth sensing platform via low earth orbit (LEO) satellite, this paper presents a design of L-probe fed miniaturized patch antenna with two operating frequencies in 860MHz/920MHz bands. Characteristics of the designed antenna is evaluated by performing the electromagnetic simulation based on the finite element method (FEM).","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124696041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993602
Mina Endo, S. Saito, Y. Kimura
This paper presents design of a circularly-polarized (CP) two-element microstrip antenna (MSA) array excited by a cross slot on a broad wall of the rectangular waveguide for a waveguide-fed planar array. In order to realize a CP slot array arranged at a spacing of one guided wavelength on a broad wall of the waveguide, it is proposed to place two CP MSA elements on each cross slot with a dielectric substrate. In this paper, a series-fed two-element CP MSA array excited by a cross slot on a broad wall of the rectangular waveguide is designed as an element of a waveguide-fed CP planar array on the broad wall by using ANSYS HFSS. The design frequency is 11.2 GHz and an X-band standard waveguide is used. It is confirmed by the simulation that CP radiation with an axial ratio of 2.2 dB as well as a sharp main beam in the waveguide axis plane for grating lobe suppression can be obtained by the designed MSA array at the design frequency.
{"title":"Design of a circularly-polarized two-element microstrip antenna array excited by a cross slot on a broad wall of the rectangular waveguide for a waveguide-fed planar array","authors":"Mina Endo, S. Saito, Y. Kimura","doi":"10.1109/iWEM52897.2022.9993602","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993602","url":null,"abstract":"This paper presents design of a circularly-polarized (CP) two-element microstrip antenna (MSA) array excited by a cross slot on a broad wall of the rectangular waveguide for a waveguide-fed planar array. In order to realize a CP slot array arranged at a spacing of one guided wavelength on a broad wall of the waveguide, it is proposed to place two CP MSA elements on each cross slot with a dielectric substrate. In this paper, a series-fed two-element CP MSA array excited by a cross slot on a broad wall of the rectangular waveguide is designed as an element of a waveguide-fed CP planar array on the broad wall by using ANSYS HFSS. The design frequency is 11.2 GHz and an X-band standard waveguide is used. It is confirmed by the simulation that CP radiation with an axial ratio of 2.2 dB as well as a sharp main beam in the waveguide axis plane for grating lobe suppression can be obtained by the designed MSA array at the design frequency.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993574
Ryoto Ohgushi, Shota Takato, H. Arai
When antennas are used in a small area, there is a problem that the mutual coupling between the antennas becomes large. In order to reduce the mutual coupling, we consider the neutralization bridge, in which the feeding points are connected by bridges to cancel the currents on each other's antennas. Decoupling structures using suspended bridges are difficult to fabricate then we design and evaluate decoupling structure embedded in dielectric substrate for easy fabrication.
{"title":"Decoupling design of quad polarization patch antenna using neutralization bridge","authors":"Ryoto Ohgushi, Shota Takato, H. Arai","doi":"10.1109/iWEM52897.2022.9993574","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993574","url":null,"abstract":"When antennas are used in a small area, there is a problem that the mutual coupling between the antennas becomes large. In order to reduce the mutual coupling, we consider the neutralization bridge, in which the feeding points are connected by bridges to cancel the currents on each other's antennas. Decoupling structures using suspended bridges are difficult to fabricate then we design and evaluate decoupling structure embedded in dielectric substrate for easy fabrication.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125094935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9992297
Hanns Christian Chua, Keizo Cho, H. Nakabayashi, K. Suizu
This paper proposes a position estimation method using the time-reversal algorithm with reflectors in FDTD. Two thin cylindrical passive targets were randomly placed in the target area, where a Gaussian pulse was sent towards the area, and the reflected signals were received by an antenna array. After the signal was time-reversed, time-gating was applied to the signals to separate the direct path and multipath signals. Then, the reverse mode was done by back-propagation, and finally, cross-correlating the direct path and multipath signals' trajectory. Peaks in the electric field showed the estimated position of the targets.
{"title":"Position Estimation of Two Thin Cylindrical Targets Using Time Reversal Algorithm with Reflectors","authors":"Hanns Christian Chua, Keizo Cho, H. Nakabayashi, K. Suizu","doi":"10.1109/iWEM52897.2022.9992297","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9992297","url":null,"abstract":"This paper proposes a position estimation method using the time-reversal algorithm with reflectors in FDTD. Two thin cylindrical passive targets were randomly placed in the target area, where a Gaussian pulse was sent towards the area, and the reflected signals were received by an antenna array. After the signal was time-reversed, time-gating was applied to the signals to separate the direct path and multipath signals. Then, the reverse mode was done by back-propagation, and finally, cross-correlating the direct path and multipath signals' trajectory. Peaks in the electric field showed the estimated position of the targets.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127374772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993562
Takumi Nishime, N. Michishita, H. Morishita
Mobile devices have many antennas and further miniaturization of antennas is required. Dielectric loading and impedance loading are known as miniaturization techniques. On the other hand, these miniaturization techniques cause a decrease in radiation efficiency due to dielectric loss and conductor loss. To overcome this problem, the excitation of the platform as a radiator has been proposed. This paper investigates the radiation characteristics of the platform with an electromagnetic band gap (EBG) structure.
{"title":"Radiation Characteristic on Metal Platform with Mushroom-like EBG Structures","authors":"Takumi Nishime, N. Michishita, H. Morishita","doi":"10.1109/iWEM52897.2022.9993562","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993562","url":null,"abstract":"Mobile devices have many antennas and further miniaturization of antennas is required. Dielectric loading and impedance loading are known as miniaturization techniques. On the other hand, these miniaturization techniques cause a decrease in radiation efficiency due to dielectric loss and conductor loss. To overcome this problem, the excitation of the platform as a radiator has been proposed. This paper investigates the radiation characteristics of the platform with an electromagnetic band gap (EBG) structure.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125968218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9992296
Hajime Suzuki, Kiichi Wakayama, S. Makino, K. Itoh
This study examined a compact and thin metasurface-inspired antenna chip developed by the KIT EOE Laboratory (MACKEY). It can operate in free space and on metals. This study investigates the operation of MACKEY II when it is continuously arrayed in the electric and magnetic field directions.
{"title":"Consideration of a One-Dimensional MACKEY Array","authors":"Hajime Suzuki, Kiichi Wakayama, S. Makino, K. Itoh","doi":"10.1109/iWEM52897.2022.9992296","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9992296","url":null,"abstract":"This study examined a compact and thin metasurface-inspired antenna chip developed by the KIT EOE Laboratory (MACKEY). It can operate in free space and on metals. This study investigates the operation of MACKEY II when it is continuously arrayed in the electric and magnetic field directions.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121969307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993476
Jiashu Yang, K. Tong
This work presents a surface wave antenna metallic cell pattern prediction method which can be generated based on the required far-field radiation pattern by the mean of applying Wasserstein generative adversarial network (WGAN) and bi-directional gated recurrent unit (Bi-GRU) neural network models. The predicted metallic cell pattern has been 3D-modelled in CST and the radiation pattern shows less than 1 dBi variation level from the desired input radiation pattern.
{"title":"Surface Wave Antenna Metallic Cell Pattern Design Using Neural Network Method","authors":"Jiashu Yang, K. Tong","doi":"10.1109/iWEM52897.2022.9993476","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993476","url":null,"abstract":"This work presents a surface wave antenna metallic cell pattern prediction method which can be generated based on the required far-field radiation pattern by the mean of applying Wasserstein generative adversarial network (WGAN) and bi-directional gated recurrent unit (Bi-GRU) neural network models. The predicted metallic cell pattern has been 3D-modelled in CST and the radiation pattern shows less than 1 dBi variation level from the desired input radiation pattern.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127602578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993537
Michinori Yoneda, Keito Yokoe, S. Makino, K. Itoh
This research aimed to convert linear convectional polarization to circular polarization using an unbalanced the metasurface-inspired antenna chip developed by the KIT EOE Laboratory (MACKEY). Moreover, we aimed to achieve a Voltage Standing Wave Ratio (VSWR) of less than three and axial ratio of less than 3 dB in free space and on metal at 2.4-2.5 GHz. For this purpose, we proposed a circularly polarized MACKEY C4 antenna with four grid plates. We achieved our goal by examining the slit width and antenna position.
{"title":"Optimization of Axial Ratio Characteristics of Circularly Polarized MACKEY","authors":"Michinori Yoneda, Keito Yokoe, S. Makino, K. Itoh","doi":"10.1109/iWEM52897.2022.9993537","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993537","url":null,"abstract":"This research aimed to convert linear convectional polarization to circular polarization using an unbalanced the metasurface-inspired antenna chip developed by the KIT EOE Laboratory (MACKEY). Moreover, we aimed to achieve a Voltage Standing Wave Ratio (VSWR) of less than three and axial ratio of less than 3 dB in free space and on metal at 2.4-2.5 GHz. For this purpose, we proposed a circularly polarized MACKEY C4 antenna with four grid plates. We achieved our goal by examining the slit width and antenna position.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126616534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-29DOI: 10.1109/iWEM52897.2022.9993561
H. Matsuno, Takuya Ohto, Takahiro Hayashi
Intelligent reflecting surfaces (IRS) are considered a key technology of the future mobile communication systems. In order to utilize IRS in the mobile networks, techniques relating to reflectors, propagation, reflection control, and the cooperative control system between IRS and the mobile network must be investigated. In this paper, the IRSs we developed are introduced including our current research project.
{"title":"Development of Intelligent Reflecting Surfaces for Mobile Communication Systems","authors":"H. Matsuno, Takuya Ohto, Takahiro Hayashi","doi":"10.1109/iWEM52897.2022.9993561","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993561","url":null,"abstract":"Intelligent reflecting surfaces (IRS) are considered a key technology of the future mobile communication systems. In order to utilize IRS in the mobile networks, techniques relating to reflectors, propagation, reflection control, and the cooperative control system between IRS and the mobile network must be investigated. In this paper, the IRSs we developed are introduced including our current research project.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131626887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents a 1×3 antenna array composed of a radiator and a reflector. The radiator consists of three series feeding circular patches etched with slots. Coplanar waveguide feeding is adopted to obtain ultra-wide bandwidth. The radiator is printed on a flexible substrate of polyimide with thickness of 70µm. A ground plane is arranged under the radiator to obtain directional radiation. The total size of the proposed antenna is 94mm×26mm×25.07mm. The proposed antenna's simulated bandwidth of is 3.19-20 GHz.
{"title":"A Series-Fed Ultra-wideband Antenna Array","authors":"Yao-Zong Sui, Xingyu Zhou, Hongfei Chang, Xinlong Xu, Xin Meng, Yuhao Zhang, Weihua Zong","doi":"10.1109/iWEM52897.2022.9993576","DOIUrl":"https://doi.org/10.1109/iWEM52897.2022.9993576","url":null,"abstract":"This paper presents a 1×3 antenna array composed of a radiator and a reflector. The radiator consists of three series feeding circular patches etched with slots. Coplanar waveguide feeding is adopted to obtain ultra-wide bandwidth. The radiator is printed on a flexible substrate of polyimide with thickness of 70µm. A ground plane is arranged under the radiator to obtain directional radiation. The total size of the proposed antenna is 94mm×26mm×25.07mm. The proposed antenna's simulated bandwidth of is 3.19-20 GHz.","PeriodicalId":433151,"journal":{"name":"2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133867089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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