Pub Date : 2020-02-01DOI: 10.1109/AMS48904.2020.9059416
Ji-wei Lian, Y. Ban, He Zhu, Y. Guo
A 2-D Butler matrix (BM) in uniplanar configuration for designing multibeam array antenna (MAA) is proposed using substrate integrated waveguide (SIW) technology. Firstly, a novel topology for building uniplanar 2D BM is proposed, which successfully transforms the traditional 3-D topology to a 2-D (or uniplanar) one. To realize the planarization of basic components, a novel design of eight-port hybrid couplers, is developed to transform four spatially intersected couplers to a planar structure. To address the issue of excessive path intersections, a novel SIW eight-port crossover is proposed to reduce the number of path intersections from 16 to merely 4. Using this proposed 2-D BM, a 2-D MAA with 16 (4 × 4) beams can be realized.
{"title":"Uniplanar 2-D Butler Matrix for Multibeam Arrays","authors":"Ji-wei Lian, Y. Ban, He Zhu, Y. Guo","doi":"10.1109/AMS48904.2020.9059416","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059416","url":null,"abstract":"A 2-D Butler matrix (BM) in uniplanar configuration for designing multibeam array antenna (MAA) is proposed using substrate integrated waveguide (SIW) technology. Firstly, a novel topology for building uniplanar 2D BM is proposed, which successfully transforms the traditional 3-D topology to a 2-D (or uniplanar) one. To realize the planarization of basic components, a novel design of eight-port hybrid couplers, is developed to transform four spatially intersected couplers to a planar structure. To address the issue of excessive path intersections, a novel SIW eight-port crossover is proposed to reduce the number of path intersections from 16 to merely 4. Using this proposed 2-D BM, a 2-D MAA with 16 (4 × 4) beams can be realized.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"29 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":"114715394","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/AMS48904.2020.9059333
Touseef Hayat, M. Afzal, F. Ahmed, A. Lalbakhsh, K. Esselle
The paper presents a 3D printable porous superstrate (PS) to enhance directive radiation performance of low to medium gain antennas. The PS design process is based on the theory of near-field phase correction. Transmission phase through PS is locally varied by changing sizes of perforations in different sections of the PS. The PS is designed for a resonant cavity antenna (RCA) using acrylonitrile butadiene styrene (ABS) filament. With PS the RCA aperture phase is relatively planar and its directivity in boresight direction is increased by 7.2 dB (14.8 dB to 22 dB) along with 8.2 dB reduction in side-lobe levels (SLL) and 31% increase in aperture efficiency.
本文提出了一种可3D打印的多孔上覆层(PS)，用于提高中低增益天线的定向辐射性能。PS的设计过程基于近场相位校正理论。通过PS的传输相位通过改变PS不同部分穿孔的大小而局部改变。PS设计用于使用丙烯腈-丁二烯-苯乙烯(ABS)长丝的谐振腔天线(RCA)。采用PS后，RCA孔径相位相对平坦，孔径指向性提高7.2 dB (14.8 dB ~ 22 dB)，旁瓣电平降低8.2 dB，孔径效率提高31%。
{"title":"3D Printable Lightweight Porous Superstrate for Improved Radiation Performance of Antenna","authors":"Touseef Hayat, M. Afzal, F. Ahmed, A. Lalbakhsh, K. Esselle","doi":"10.1109/AMS48904.2020.9059333","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059333","url":null,"abstract":"The paper presents a 3D printable porous superstrate (PS) to enhance directive radiation performance of low to medium gain antennas. The PS design process is based on the theory of near-field phase correction. Transmission phase through PS is locally varied by changing sizes of perforations in different sections of the PS. The PS is designed for a resonant cavity antenna (RCA) using acrylonitrile butadiene styrene (ABS) filament. With PS the RCA aperture phase is relatively planar and its directivity in boresight direction is increased by 7.2 dB (14.8 dB to 22 dB) along with 8.2 dB reduction in side-lobe levels (SLL) and 31% increase in aperture efficiency.","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":"116414932","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/AMS48904.2020.9059295
Reham M. Fouda, T. Baum, K. Ghorbani
Orbital Angular Momentum (OAM) is a physical property of EM fields, which allows for the superposition of an infinite number of modes to exist on the same frequency carrier. However, as the number of OAM mode transmitted increases, so does the aperture size. Previous studies have shown that a QuasiCircular Array Antenna (QCA), where the annular aperture is truncated, is capable of producing a first-order Quasi-OAM noninteger mode. This paper investigates the capability of QCA apertures, in producing higher-order Quasi-OAM modes. The experimental results in free-space demonstrated herein, show that a QCA of six elements, is able to produce a non-integer Quasi-OAM mode of I = +1. 5, falling to the nearest integer mode I = +2 in the far-field.
{"title":"Higher-Order Quasi-OAM Generation Utilizing a Quasi-Circular Array Antenna","authors":"Reham M. Fouda, T. Baum, K. Ghorbani","doi":"10.1109/AMS48904.2020.9059295","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059295","url":null,"abstract":"Orbital Angular Momentum (OAM) is a physical property of EM fields, which allows for the superposition of an infinite number of modes to exist on the same frequency carrier. However, as the number of OAM mode transmitted increases, so does the aperture size. Previous studies have shown that a QuasiCircular Array Antenna (QCA), where the annular aperture is truncated, is capable of producing a first-order Quasi-OAM noninteger mode. This paper investigates the capability of QCA apertures, in producing higher-order Quasi-OAM modes. The experimental results in free-space demonstrated herein, show that a QCA of six elements, is able to produce a non-integer Quasi-OAM mode of I = +1. 5, falling to the nearest integer mode I = +2 in the far-field.","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":"126810619","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/AMS48904.2020.9059529
Wei Lin, R. Ziolkowski
A circularly polarized (CP) wireless power transfer (WPT) system is demonstrated. It consists of a high directivity, omnidirectional CP (OCP) antenna array and multiple electrically small Huygens CP (HCP) rectennas. The OCP array emits highly directional CP fields over the entire azimuthal plane. It acts as the wireless power source for charging or powering up surrounding IoT sensors. The OCP array is realized by cascading multiple vertical bars and helical loops to form a set of properly phased, collinear array of electric and magnetic dipoles. Wirelessly powered (WP) sensors are facilitated by combining sensors with HCP rectennas, the latter being a seamless integration of an electrically small HCP antenna with highly efficient rectifier circuits. Both systems were tested and achieved their predicted performance characteristics. These WP sensor systems are ideal candidates for wireless internet-of-things (IoT) applications, for example, in the food and agriculture industries, which are amongst the largest enterprises in Australia.
{"title":"A Circularly Polarized Wireless Power Transfer System for Internet-of-Things (IoT) Applications","authors":"Wei Lin, R. Ziolkowski","doi":"10.1109/AMS48904.2020.9059529","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059529","url":null,"abstract":"A circularly polarized (CP) wireless power transfer (WPT) system is demonstrated. It consists of a high directivity, omnidirectional CP (OCP) antenna array and multiple electrically small Huygens CP (HCP) rectennas. The OCP array emits highly directional CP fields over the entire azimuthal plane. It acts as the wireless power source for charging or powering up surrounding IoT sensors. The OCP array is realized by cascading multiple vertical bars and helical loops to form a set of properly phased, collinear array of electric and magnetic dipoles. Wirelessly powered (WP) sensors are facilitated by combining sensors with HCP rectennas, the latter being a seamless integration of an electrically small HCP antenna with highly efficient rectifier circuits. Both systems were tested and achieved their predicted performance characteristics. These WP sensor systems are ideal candidates for wireless internet-of-things (IoT) applications, for example, in the food and agriculture industries, which are amongst the largest enterprises in Australia.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"130 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":"122252406","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/AMS48904.2020.9059523
Leigh E. Milner, L. Hall, S. Chakraborty, C. Ritchie, M. Heimlich
A 0.13 SiGe upconverter circuit is presented that is suitable for use in broadband millimetre-wave transmitters and active phased arrays. The circuit accepts four differential IF inputs (I+, I−, Q+, Q−) in the frequency range of DC to 13 GHz. An off-chip X-band LO passes through an on-chip tripler before being used to drive the image rejection mixer. The resultant output may be placed anywhere in the frequency range of 25 to 42 GHz. When all four inputs are utilised the RF signals are combined passively at the mixer outputs to achieve an output referred P1dB compression point of +4.4 dBm without the need for additional amplifiers in the RF signal path. This paper highlights the measured bandwidth and single-tone compression characteristic of the circuit. Layout techniques are also briefly described.
{"title":"A Broadband 25 to 42 GHz SiGe Upconverter","authors":"Leigh E. Milner, L. Hall, S. Chakraborty, C. Ritchie, M. Heimlich","doi":"10.1109/AMS48904.2020.9059523","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059523","url":null,"abstract":"A 0.13 SiGe upconverter circuit is presented that is suitable for use in broadband millimetre-wave transmitters and active phased arrays. The circuit accepts four differential IF inputs (I+, I−, Q+, Q−) in the frequency range of DC to 13 GHz. An off-chip X-band LO passes through an on-chip tripler before being used to drive the image rejection mixer. The resultant output may be placed anywhere in the frequency range of 25 to 42 GHz. When all four inputs are utilised the RF signals are combined passively at the mixer outputs to achieve an output referred P1dB compression point of +4.4 dBm without the need for additional amplifiers in the RF signal path. This paper highlights the measured bandwidth and single-tone compression characteristic of the circuit. Layout techniques are also briefly described.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"241 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":"133274924","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}
{"title":"A New Type of Octave-Bandwidth Orthomode Transducer: The Bullet OMT","authors":"C. Granet, J. Kot","doi":"10.1109/AMS48904.2020.9059410","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059410","url":null,"abstract":"A new type of octave-bandwidth orthomode transducer (OMT) is presented along with a theoretical example covering the 3.5 − 7 GHz bandwidth.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"6 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":"121043655","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/AMS48904.2020.9059443
I. Shahid, D. Thalakotuna, D. Karmokar, M. Heimlich
A 1-D periodic structure having two shorted patches bearing dissimilar dimensions, in a unit cell, have been investigated for its application as a reconfigurable filter. To demonstrate the working mechanism, reactive loading to microstrip line is changed by periodically altering the patch connection to ground through presence/absence of shorting vias. Six filter structures with same unit cell dimensions and different switching patterns have been fabricated that represent different configurations of the filter. The proposed structure behaves as an all-pass filter in one state, and as a low pass filter and bandstop filter in other states with tunable cutoff frequencies.
{"title":"Reactively Loaded Microstrip Line Based 1-D Periodic Structure with All-Pass, Low Pass and Stopband Filter Characteristics","authors":"I. Shahid, D. Thalakotuna, D. Karmokar, M. Heimlich","doi":"10.1109/AMS48904.2020.9059443","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059443","url":null,"abstract":"A 1-D periodic structure having two shorted patches bearing dissimilar dimensions, in a unit cell, have been investigated for its application as a reconfigurable filter. To demonstrate the working mechanism, reactive loading to microstrip line is changed by periodically altering the patch connection to ground through presence/absence of shorting vias. Six filter structures with same unit cell dimensions and different switching patterns have been fabricated that represent different configurations of the filter. The proposed structure behaves as an all-pass filter in one state, and as a low pass filter and bandstop filter in other states with tunable cutoff frequencies.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"28 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":"122028579","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/AMS48904.2020.9059542
S. Albahrani, Jason Hodges, L. Heuken, D. Schwantuschke, T. Gneiting, J. Burghartz, S. Khandelwal
This paper validates the industry standard ASMGaN compact model in terms of capturing the effect of gatelength scaling. Pulsed IV measurements were performed to measure the variation in the IV characteristics of the GaN HEMT structure under test with gate length, in isolation from the effect of trapping. The model has been validated by comparing the simulation results of the model with the pulsed IV measurement results of three AlGaN/GaN Schottky HEMTs which differed only in terms of their gate lengths.
{"title":"Validation of the Industry-Standard ASM-GaN Model for Gate-Length Scaling","authors":"S. Albahrani, Jason Hodges, L. Heuken, D. Schwantuschke, T. Gneiting, J. Burghartz, S. Khandelwal","doi":"10.1109/AMS48904.2020.9059542","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059542","url":null,"abstract":"This paper validates the industry standard ASMGaN compact model in terms of capturing the effect of gatelength scaling. Pulsed IV measurements were performed to measure the variation in the IV characteristics of the GaN HEMT structure under test with gate length, in isolation from the effect of trapping. The model has been validated by comparing the simulation results of the model with the pulsed IV measurement results of three AlGaN/GaN Schottky HEMTs which differed only in terms of their gate lengths.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"54 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":"123627556","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/AMS48904.2020.9059299
H. Bello, L. Pantoli, M. Alim, A. Rezazadeh
This work focused on the design, characterization and investigation of GaAs based multi-layered compact 3D MMIC based antenna. Different patch antennas were designed and characterized along with its S-parameters. The proposed models of multi-layered patch antennas use V-shaped feeder line or a spiral transmission feeder line. The newly propose planar antennas are more compact in area compared to using the normal planar feeder line; this design approach allows to have wider bandwidth, better input return loss and a slightly lower resonance frequency.
{"title":"Design and Investigation of a Compact 3D MMIC Patch Antenna for mm Wave Applications","authors":"H. Bello, L. Pantoli, M. Alim, A. Rezazadeh","doi":"10.1109/AMS48904.2020.9059299","DOIUrl":"https://doi.org/10.1109/AMS48904.2020.9059299","url":null,"abstract":"This work focused on the design, characterization and investigation of GaAs based multi-layered compact 3D MMIC based antenna. Different patch antennas were designed and characterized along with its S-parameters. The proposed models of multi-layered patch antennas use V-shaped feeder line or a spiral transmission feeder line. The newly propose planar antennas are more compact in area compared to using the normal planar feeder line; this design approach allows to have wider bandwidth, better input return loss and a slightly lower resonance frequency.","PeriodicalId":257699,"journal":{"name":"2020 4th Australian Microwave Symposium (AMS)","volume":"14 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":"128204325","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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