Pub Date : 2020-02-01DOI: 10.1109/AMS48904.2020.9059293
Y. Sugimoto
This paper describes a method for extending the power-transmitting distance of a wireless power transfer (WPT) system by applying a Q-value enhancement technique. The effectiveness of the method has been verified by experiments, calculations and circuit simulations. Results revealed that transmitting power, transfer efficiency, and transmitting distance were all increased. The reachable distance of the power was extended 1.5 times that of the current one when the Q-value enhancement technique was applied to a coil in the receiver.
{"title":"Extension of Power-Transmitting Distance for a WPT System using Q-value Enhancement Technique","authors":"Y. Sugimoto","doi":"10.1109/AMS48904.2020.9059293","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059293","url":null,"abstract":"This paper describes a method for extending the power-transmitting distance of a wireless power transfer (WPT) system by applying a Q-value enhancement technique. The effectiveness of the method has been verified by experiments, calculations and circuit simulations. Results revealed that transmitting power, transfer efficiency, and transmitting distance were all increased. The reachable distance of the power was extended 1.5 times that of the current one when the Q-value enhancement technique was applied to a coil in the receiver.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122982437","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059490
Quoc Hung Dang, S. J. Chen, Donald Dong Zhang, Dennis David Kimtai, C. Fumeaux
Several flexible substrate materials potentially usable for wearable antennas are presented in this paper, including rubber, leather and foam. The measured electrical characteristics are compared to show their pros and cons in view of wearable antenna design. Two planar inverted-F antennas based on two promising materials are designed, fabricated and measured. Material characteristics and experimental results suggest that natural rubber, which has a relative permittivity of around 6.4 is an appropriate flexible material for wearable antennas.
{"title":"Flexible Substrate Materials for Wearable Antennas","authors":"Quoc Hung Dang, S. J. Chen, Donald Dong Zhang, Dennis David Kimtai, C. Fumeaux","doi":"10.1109/AMS48904.2020.9059490","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059490","url":null,"abstract":"Several flexible substrate materials potentially usable for wearable antennas are presented in this paper, including rubber, leather and foam. The measured electrical characteristics are compared to show their pros and cons in view of wearable antenna design. Two planar inverted-F antennas based on two promising materials are designed, fabricated and measured. Material characteristics and experimental results suggest that natural rubber, which has a relative permittivity of around 6.4 is an appropriate flexible material for wearable antennas.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129167659","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059504
M. Alibakhshikenari, B. Virdee, C. See, R. Abd‐Alhameed, F. Falcone, E. Limiti
A unique metasurface is presented that can be used to control the polarization of electromagnetic waves. The dual band metasurface is realized by stacking an array of multiple concentric circular rings. By rotating each array with respect to each other, we can manipulate its impedance at distinct frequencies. The versatility of the proposed metasurface is numerically verified.
{"title":"Metasurface for Controlling Polarization of Scattered EM Waves","authors":"M. Alibakhshikenari, B. Virdee, C. See, R. Abd‐Alhameed, F. Falcone, E. Limiti","doi":"10.1109/AMS48904.2020.9059504","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059504","url":null,"abstract":"A unique metasurface is presented that can be used to control the polarization of electromagnetic waves. The dual band metasurface is realized by stacking an array of multiple concentric circular rings. By rotating each array with respect to each other, we can manipulate its impedance at distinct frequencies. The versatility of the proposed metasurface is numerically verified.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126472304","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059520
Seoung-Young Koo, Sun-Keun Park, Sang‐Min Han, Jongsik Lim, Kye-Si Kwon, D. Ahn
In this paper, we design and fabricate transmission line resonators to verify the applicability of transmission line for high frequency band using inkjet printing technology. The implementation of the transmission line using inkjet print technology has an advantage that it can be implemented only in two steps, printing process for patterned lines and sintering process, compared with the conventional PCB manufacturing process. However, the transmission line required for the high frequency is not only connected to the signal line, but also a small loss of the line is an important factor. Thus, ten resonator samples are fabricated using the inkjet printing technique having the advantage of a simple manufacturing process, and the electrical characteristics were verified. The gap between the 50 ohm line and the transmission line for measurement was 0.3mm, and the line width was implemented as from 250 um to 700 um. The ink used in the fabrication is a silver nano paste ink of NPK with a viscosity of 5000 to 20000 cPs, and is sintered for 5 minutes on a 350 0C hot plate. Measurement results of fabricated samples using Network Analyzer showed that all 10 resonators had Q-factor of 70 to 90 around 2.7GHz. This is a very important result that shows the inkjet printing development technology can be applied to the implementation of the high frequency circuit in the future.
{"title":"An Implementation Method of Transmission Line for High Frequency Band Using Inkjet Printing Technique","authors":"Seoung-Young Koo, Sun-Keun Park, Sang‐Min Han, Jongsik Lim, Kye-Si Kwon, D. Ahn","doi":"10.1109/AMS48904.2020.9059520","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059520","url":null,"abstract":"In this paper, we design and fabricate transmission line resonators to verify the applicability of transmission line for high frequency band using inkjet printing technology. The implementation of the transmission line using inkjet print technology has an advantage that it can be implemented only in two steps, printing process for patterned lines and sintering process, compared with the conventional PCB manufacturing process. However, the transmission line required for the high frequency is not only connected to the signal line, but also a small loss of the line is an important factor. Thus, ten resonator samples are fabricated using the inkjet printing technique having the advantage of a simple manufacturing process, and the electrical characteristics were verified. The gap between the 50 ohm line and the transmission line for measurement was 0.3mm, and the line width was implemented as from 250 um to 700 um. The ink used in the fabrication is a silver nano paste ink of NPK with a viscosity of 5000 to 20000 cPs, and is sintered for 5 minutes on a 350 0C hot plate. Measurement results of fabricated samples using Network Analyzer showed that all 10 resonators had Q-factor of 70 to 90 around 2.7GHz. This is a very important result that shows the inkjet printing development technology can be applied to the implementation of the high frequency circuit in the future.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127925871","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059420
Asako Suzuki, S. Hara
Efficiency is critical element for microwave power amplifier, especially for energy applications. In this paper, the new design approach to enhance the efficiency which eliminates the output matching circuit is proposed. A 2.4GHz GaN power amplifier is demonstrated using the proposed design method. By eliminating the matching circuit and applying inverse class-F operation, the drain efficiency of 82.3% and power added efficiency of 78.8% are obtained for 30W power amplifier.
{"title":"2.4GHz High Efficiency GaN Power Amplifier using Matching Circuit Less Design","authors":"Asako Suzuki, S. Hara","doi":"10.1109/AMS48904.2020.9059420","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059420","url":null,"abstract":"Efficiency is critical element for microwave power amplifier, especially for energy applications. In this paper, the new design approach to enhance the efficiency which eliminates the output matching circuit is proposed. A 2.4GHz GaN power amplifier is demonstrated using the proposed design method. By eliminating the matching circuit and applying inverse class-F operation, the drain efficiency of 82.3% and power added efficiency of 78.8% are obtained for 30W power amplifier.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132668586","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059330
F. Zohra, O. Salim, S. Dey, Hossein Masoumi, N. Karmakar
Chipless RFID tags can be used as sensors to monitor the health of coal transporting conveyor belts. However, the proximity to different dielectric materials of the conveyor belt‘s structure influences the sensor behavior dramatically. In this paper, the effect of a practical belt's composition layers with varying dielectric properties on a chipless tag is investigated. The significant change in the tag‘s resonant frequency and notch depth demonstrates the prominence of material properties on tag response. This investigation would help to improve the system modelling and sensor‘s performance when the chipless RFID sensors are embedded in coal mining conveyor belt.
{"title":"Investigation of Chipless RFID Tag Performance in Coal Mining Conveyor Belt","authors":"F. Zohra, O. Salim, S. Dey, Hossein Masoumi, N. Karmakar","doi":"10.1109/AMS48904.2020.9059330","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059330","url":null,"abstract":"Chipless RFID tags can be used as sensors to monitor the health of coal transporting conveyor belts. However, the proximity to different dielectric materials of the conveyor belt‘s structure influences the sensor behavior dramatically. In this paper, the effect of a practical belt's composition layers with varying dielectric properties on a chipless tag is investigated. The significant change in the tag‘s resonant frequency and notch depth demonstrates the prominence of material properties on tag response. This investigation would help to improve the system modelling and sensor‘s performance when the chipless RFID sensors are embedded in coal mining conveyor belt.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116945713","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059541
M. Salarrahimi, G. Vandenbosch
In this paper, we propose a symmetric dual metasurface-based waveguide. The metasurfaces provide a duality impedance, which can support a linear edge mode at the interface of the metasurfaces. The mode is a very confined TEM mode and is protected against backscattering. The metasurfaces are implemented by a couple of complementary structures. One is a bed of nails and the other is a holey structure.
{"title":"Exciting the Edge Mode in a Dual Metasurface PTD Symmetric Waveguide","authors":"M. Salarrahimi, G. Vandenbosch","doi":"10.1109/AMS48904.2020.9059541","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059541","url":null,"abstract":"In this paper, we propose a symmetric dual metasurface-based waveguide. The metasurfaces provide a duality impedance, which can support a linear edge mode at the interface of the metasurfaces. The mode is a very confined TEM mode and is protected against backscattering. The metasurfaces are implemented by a couple of complementary structures. One is a bed of nails and the other is a holey structure.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122973898","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059344
K. Eccleston, I. Platt, I. Woodhead, A. Tan
A matrix-based method is developed to a material sample that displays both tangential and normal directed surface effects. The method was applied to a simulated continuous medium sample with imposed surface effects.
{"title":"Matrix-based Constitutive Parameter and Generalised Surface Effect Retrieval","authors":"K. Eccleston, I. Platt, I. Woodhead, A. Tan","doi":"10.1109/AMS48904.2020.9059344","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059344","url":null,"abstract":"A matrix-based method is developed to a material sample that displays both tangential and normal directed surface effects. The method was applied to a simulated continuous medium sample with imposed surface effects.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131634678","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059368
S. Fujii, Toonoe Haruki, Yasunori Shiba
Diamond is known to have the highest sound velocity of all materials, and therefore, has been applied to high frequency surface acoustic wave (SAW) devices in SHF bands. Our earlier research has shown much potential for diamond SAW resonators and filters on single crystal substrates at frequencies above 3 GHz. However, single crystal diamond wafers of only up to two-inch in diameter have been realized; in consequence, diamond SAW resonators were far from commercial development. A novel CMOS device fabrication system developed by Hara et al., called the Minimal-Fab process, was thus applied in the fabrication of SAW resonators. It utilizes a half-inch diameter wafer, and proceeds with device fabrication via half-micron fine pattern, without needing a cleanroom. Here, we discuss the potential of the Minimal-fab process, and our fabrication of diamond SAW resonators using it, where we used a half-inch diamond wafer.
{"title":"Diamond SAW Resonator","authors":"S. Fujii, Toonoe Haruki, Yasunori Shiba","doi":"10.1109/AMS48904.2020.9059368","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059368","url":null,"abstract":"Diamond is known to have the highest sound velocity of all materials, and therefore, has been applied to high frequency surface acoustic wave (SAW) devices in SHF bands. Our earlier research has shown much potential for diamond SAW resonators and filters on single crystal substrates at frequencies above 3 GHz. However, single crystal diamond wafers of only up to two-inch in diameter have been realized; in consequence, diamond SAW resonators were far from commercial development. A novel CMOS device fabrication system developed by Hara et al., called the Minimal-Fab process, was thus applied in the fabrication of SAW resonators. It utilizes a half-inch diameter wafer, and proceeds with device fabrication via half-micron fine pattern, without needing a cleanroom. Here, we discuss the potential of the Minimal-fab process, and our fabrication of diamond SAW resonators using it, where we used a half-inch diamond wafer.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133768719","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 : 2020-02-01DOI: 10.1109/AMS48904.2020.9059334
N. Nguyen-Trong, M. Ikram
This paper discusses the use of slot geometry as a multi-functional structure in integrated 4G/5G applications. It will be demonstrated that while working as a highly directive antenna at millimeter-wave, the slot can be utilized as either an omnidirectional antenna at the lower frequency or an effective decoupling structure for the low-frequency antenna system.
{"title":"Multi-Functional Structures for 4G/5G Antennas Utilizing Slot Geometry","authors":"N. Nguyen-Trong, M. Ikram","doi":"10.1109/AMS48904.2020.9059334","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059334","url":null,"abstract":"This paper discusses the use of slot geometry as a multi-functional structure in integrated 4G/5G applications. It will be demonstrated that while working as a highly directive antenna at millimeter-wave, the slot can be utilized as either an omnidirectional antenna at the lower frequency or an effective decoupling structure for the low-frequency antenna system.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114793210","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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