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A Travelling-Wave-Fed Slot Spiral Antenna with Wide Axial-Ratio Bandwidth and Beamwidth for GNSS Applications

Zeng-Pei Zhong, Xiao Zhang
2021 IEEE Open Journal of Antennas and Propagation  
A travelling-wave-fed slot spiral antenna with wide axial-ratio (AR) bandwidth and beamwidth for GNSS applications is proposed in this paper.  ...  Index Terms-Axial ratio bandwidth, axial ratio beamwidth, circularly-polarized, travelling-wave-fed, wideband GNSS antenna.  ...  After that, a new planar balun feed was presented and tested for slot spiral antennas in [12] - [13] .  ... 
doi:10.1109/ojap.2021.3074287 fatcat:mzi6hnvsh5fhxgykvoff65obre

Solving electromagnetic problems with an unconditionally stable explicit finite-differenced wave equation

Zhizhang David Chen, Wei Fan
2015 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation (APCAP)  
Yamauchi, Hosei University, Japan 08:5009:10 *T1B-2 Single-Feed Dual-Band Circularly Polarized Asymmetric Four-Arm Curl Antenna S. X. Ta, I.  ...  Chu 1,2 , 1 South China University of Technology, China, 2 Southeast University, China 09:1009:30 F1A-4 A Compact Fourth-Order 6-Stage SS-FDTD Method Novel Microwave Circuits and Antennas for Radar  ... 
doi:10.1109/apcap.2015.7374248 fatcat:rvyl4sms6ndurdnt7saur5q6xi

Recent Advances of Wearable Antennas in Materials, Fabrication Methods, Designs, and Their Applications: State-of-the-Art

Shahid M. Ali, Cheab Sovuthy, Muhammad A. Imran, Soeung Socheatra, Qammer H. Abbasi, Zuhairiah Zainal Abidin
2020 Micromachines  
Wearable antennas are used for various applications, in many cases within the context of wireless body area networks (WBAN).  ...  and multi-band antennas, and their unique smart applications in WBAN.  ...  Funding: The authors would like to thank the Universiti Teknologi PETRONAS for supporting this research work. This work is funded by Yayasan Universiti Teknologi PETRONAS (YUTP) Grant 015LC0-106.  ... 
doi:10.3390/mi11100888 pmid:32987793 fatcat:hxi3aiejqbf2vdfpyrhlgzbrlm

A Review of Antennas for Picosatellite Applications

Abdul Halim Lokman, Ping Jack Soh, Saidatul Norlyana Azemi, Herwansyah Lago, Symon K. Podilchak, Suramate Chalermwisutkul, Mohd Faizal Jamlos, Azremi Abdullah Al-Hadi, Prayoot Akkaraekthalin, Steven Gao
2017 International Journal of Antennas and Propagation  
This paper presents a review of antennas suitable for picosatellite applications.  ...  An overview of the applications of picosatellites will first be explained, prior to a discussion on their antenna requirements.  ...  For instance, the design in [42] consists of four sequentially rotated circular slot antennas (in a 2 × 2 configuration) and a sequentially rotated feed network.  ... 
doi:10.1155/2017/4940656 fatcat:4b73csvahjbhti4bvyqhozvs3a


2020 2020 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM)  
ideas, and also a good venue for young scholars and research students to demonstrate their innovative works and results on electromagnetic field, antennas, RF and microwave circuit, and measurement technology  ...  After ten years of continuous holding, as a conference focusing on electromagnetics related topics, the iWEM becomes a small-scaled but international platform for scientists and engineers to exchange their  ...  We use spectrum analyzer (Agilent N9010A) to estimate the average receiption signal strength as a reference benchmark and a DTV receiption platform (RTL 2832U/R820T2) to indicate the outage probabilities  ... 
doi:10.1109/iwem49354.2020.9237401 fatcat:soy4ile3tnaqdjgnvkm27dy4dq

2019 Index IEEE Transactions on Instrumentation and Measurement Vol. 68

2019 IEEE Transactions on Instrumentation and Measurement  
Saavedra, R., +, TIM Oct. 2019 4162-4174 Monopole antennas Improved-Sensitivity Resonant Electric-Field Probes Based on Planar Spiral Stripline and Rectangular Plate Structure.  ...  ., +, TIM June 2019 1827-1832 Improved-Sensitivity Resonant Electric-Field Probes Based on Planar Spiral Stripline and Rectangular Plate Structure.  ... 
doi:10.1109/tim.2019.2956662 fatcat:kotlu7gwcngrdkelerc5va2hqe

Analysis and Design of Reconfigurable Spiral Antenna for RF Interference Mitigation [article]

Waldemar Kunysz, University Of Calgary, University Of Calgary, Michal Okoniewski, Ron H. Johnston
This dissertation introduces the concept of pattern reconfigurable antenna in a small form factor using novel reactively loaded spiral antennas.  ...  Two new antennas capable of reconfigurable pattern control are introduced: a dual polarized spiral antenna and x-spiral (cross-spiral) antenna.  ...  The presence of multiple spiral arms provides multiple degrees of freedom for the designer. For example, a four arm spiral antenna has eight possible entry points as excitation ports.  ... 
doi:10.11575/prism/24812 fatcat:dlg2gzdkqjbzvf6saum7i6ztry

Circularly Polarized Antennas for GNSS Applications

Umniyyah Ulfa Hussine
This thesis develops several different novel compacts, high gain, and wide bandwidth circularly polarized (CP) antenna capable of providing wide coverage for GNSS frequency bands from 1.16 GHz to 1.6 GHz  ...  It is a challenging task for an antenna array design to achieve a wide bandwidth, high gain, small size, good coverage, and simple fabrication technique all at the same time.  ...  of the patch [76]. 12: (a) GNSS antenna array design and (b) fabricated prototype [76] . 13: Four-element and six-element spiral array [74] , [81] . 14: (a) Antenna array geometry formed by five identical  ... 
doi:10.17638/03112717 fatcat:no43w44nargmffzkimdgvdrvhu

The science case and challenges of space-borne sub-millimeter interferometry [article]

Leonid I. Gurvits, Zsolt Paragi, Ricardo I. Amils, Ilse van Bemmel, Paul Boven, Viviana Casasola, John Conway, Jordy Davelaar, M. Carmen Díez-González, Heino Falcke, Rob Fender, Sándor Frey (+42 others)
2022 arXiv   pre-print
In particular, we consider a novel configuration of a space-borne millimeter/sub-millimeter antenna which might resolve several bottlenecks in creating large precise mechanical structures.  ...  A concept of such the system, called Terahertz Exploration and Zooming-in for Astrophysics (THEZA), has been proposed in the framework of the ESA Call for White Papers for the Voayage 2050 long term plan  ...  Acknowledgements The authors are grateful to the anonymous reviewers for valuable comments and suggestions.  ... 
arXiv:2204.09144v2 fatcat:u6z5apvg6vcrphs2vmvgumhyje

Comparison of Phase-less Direction of Arrival Estimation Methods for Switched Beam Antennas

A. Cidronali, G. Collodi, M. Lucarelli, S. Maddio, M. Passafiume, G. Pelosi, S. Selleri
2019 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring)  
Righini (Universita di Firenze); Luca Scorrano (Elettronica SpA); Stefano Selleri (University of Florence); 11:00 Coffee Break 11:30 A Novel Class of Super-elliptical Vivaldi Antennas for UWB Applications  ...  Nakano (Hosei University); 09:40 EM Simulation and Characterization of E-field Distribution around Human Arm for Human Body Communication Applications Andrey S.  ... 
doi:10.1109/piers-spring46901.2019.9017336 fatcat:adobca2sg5ga5ccjpuepkrpbsa

Atomic clocks for geodesy

Tanja E Mehlstäubler, Gesine Grosche, Christian Lisdat, Piet O Schmidt, Heiner Denker
2018 Reports on progress in physics (Print)  
Besides further improvement in stability and accuracy of today's best clocks, a large effort is put into increasing the reliability and technological readiness for applications outside of specialized laboratories  ...  The long-term stability of atomic standards will deliver excellent long-term height references for geodetic measurements and for the modelling and understanding of our Earth.  ...  Acknowledgements The authors would like to thank Ludger Timmen for valuable input to this work, Jonas Keller and Thomas Waterholter for reading of this manuscript and helpful comments, Thomas Waterholter  ... 
doi:10.1088/1361-6633/aab409 pmid:29667603 fatcat:43452hskyfg3dfbbxilnhxdq7m

All-sky visible and near infrared space astrometry

David Hobbs, Anthony Brown, Erik Høg, Carme Jordi, Daisuke Kawata, Paolo Tanga, Sergei Klioner, Alessandro Sozzetti, Łukasz Wyrzykowski, Nicholas Walton, Antonella Vallenari, Valeri Makarov (+18 others)
2021 Experimental astronomy (Print)  
The second Gaia data release contained astrometric data for almost 1.7 billion sources with tens of microarcsec (or microarcsec per year) accuracy in a vast volume of the Milky Way and future data releases  ...  Instead, it is extremely broad, answering key science questions in nearly every branch of astronomy while also providing a dense and accurate visible-NIR reference frame needed for future astronomy facilities  ...  the bulge, bar, spiral arms, and between the spiral arms.  ... 
doi:10.1007/s10686-021-09705-z fatcat:7hdexzvnsfayfcrefrfsugbr5u

2021 Index IEEE Transactions on Instrumentation and Measurement Vol. 70

2021 IEEE Transactions on Instrumentation and Measurement  
The Author Index contains the primary entry for each item, listed under the first author's name.  ...  Seong, TIM 2021 2000514 A Novel Method of Using Bifilar Spiral Resonator for Designing Thin Robust Flexible Glucose Sensors.  ...  Li, Z., +, TIM 2021 5001212 A Novel Method of Using Bifilar Spiral Resonator for Designing Thin Robust Flexible Glucose Sensors.  ... 
doi:10.1109/tim.2022.3156705 fatcat:dmqderzenrcopoyipv3v4vh4ry

Recent Advances in Polarimetry and Polarimetric Interferometry

W.-M. Boerner
2006 2006 IEEE International Symposium on Geoscience and Remote Sensing  
ACKNOWLEDGMENTS Here, our sincere gratitude is extended to the worldwide research collaborators who established the "Collaboratorium Terra Digitalis Polarimetricii et Interferometricii" for advancing this  ...  The RF sensors affected include polarimetric, interferometric and polarimetric-interferometric antenna arrays, multi-arm spiral and Butler matrix antennas, wideband polarimetric receivers as well as adaptive  ...  Indeed, multi-band 'POL-SAR Interferometry' opened a huge treasure chest of novel modeling methods for an unforeseen large number of hitherto un-approachable problems of environmental stress-change measurement  ... 
doi:10.1109/igarss.2006.17 dblp:conf/igarss/Boerner06 fatcat:554uuzyxuzbtbj3spozuprzdgm

ICCIT 2020 Conference Proceedings [Front matter]

2020 2020 23rd International Conference on Computer and Information Technology (ICCIT)  
Design of a 2x3 Microstrip Patch Phased Array Antenna for GNSS Augmentation Abstract: An array antenna has been proven to be more beneficial than a single element antenna as it augments the directivity  ...  Omar Faruqe, Maliha Elma, Nahid Hossain Antu and Md Tawfiq Amin 18:00-18:15 36 Design of a 2x3 Microstrip Patch Phased Array Antenna for GNSS Augmentation A.  ...  We created a novel data set of Bengali language and achieved our aim and reached the target using the Gaussian Naive Bayes algorithm.  ... 
doi:10.1109/iccit51783.2020.9392749 fatcat:pz3hf7rsmzbjpe6hxjlu5tmrfq
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