scholarly journals Accurate 3D Mapping Algorithm for Flexible Antennas

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Saed Asaly ◽  
Boaz Ben-Moshe ◽  
Nir Shvalb
Keyword(s):  
High Gain ◽  
Mapping Method ◽  
Experimental Result ◽  
3D Mapping ◽  
Mapping Algorithm ◽  
Flexible Antennas ◽  
Antenna Surface ◽  
Rf Antenna ◽  
Flexible Antenna ◽  
Satellite Dish

This work addresses the problem of performing an accurate 3D mapping of a flexible antenna surface. Consider a high-gain satellite flexible antenna; even a submillimeter change in the antenna surface may lead to a considerable loss in the antenna gain. Using a robotic subreflector, such changes can be compensated for. Yet, in order to perform such tuning, an accurate 3D mapping of the main antenna is required. This paper presents a general method for performing an accurate 3D mapping of marked surfaces such as satellite dish antennas. Motivated by the novel technology for nanosatellites with flexible high-gain antennas, we propose a new accurate mapping framework which requires a small-sized monocamera and known patterns on the antenna surface. The experimental result shows that the presented mapping method can detect changes up to 0.1-millimeter accuracy, while the camera is located 1 meter away from the dish, allowing an RF antenna optimization for Ka and Ku frequencies. Such optimization process can improve the gain of the flexible antennas and allow an adaptive beam shaping. The presented method is currently being implemented on a nanosatellite which is scheduled to be launched at the end of 2018.

scholarly journals Integration Study, Analysis and Design of a Flexible Antenna in OLED Light for WiMAX Wireless Communication Systems

2020 ◽  
Author(s):  
Soukaina Sekkal ◽  
Laurent Canale ◽  
Mariam El Gharbi ◽  
Adel Asselman
Keyword(s):  
Wireless Communication ◽  
Patch Antenna ◽  
Communication Systems ◽  
High Gain ◽  
Wireless Communication Systems ◽  
Light Sources ◽  
Study Analysis ◽  
Analysis And Design ◽  
Flexible Antennas ◽  
Flexible Antenna

In this work, a new flexible antenna integrated with OLED light sources is presented for WiMAX wireless communication systems. The proposed antenna was placed on a 100% polyester base with a thickness of 1.5 mm and achieved a high gain. We evaluated and tested its performance, including reflection coefficient, radiation pattern and gain. The flexible and simple patch antenna has been designed to operate at 3.5 GHz for WiMAX wireless communication systems with a gain value of 5.38 dB. This article proves the applicability of the proposed material for the integration of flexible antennas in OLEDs while maintaining gain performance similar to conventional flat antennas.

Survivable Virtual Optical Network Coordinated Mapping with Local Backup

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Danping Ren ◽  
Wei Wang ◽  
Jinhua Hu ◽  
Jijun Zhao
Keyword(s):  
Spanning Tree ◽  
Minimum Spanning Tree ◽  
Blocking Probability ◽  
Optical Network ◽  
Mapping Method ◽  
Resource Consumption ◽  
Node Degree ◽  
Network Resource ◽  
Mapping Algorithm ◽  
Degree Constraint

AbstractSurvivable virtual optical network (VON) mapping is researched to overcome the ossification of current network architectures. In this paper, we study the survivable VON mapping problem in elastic optical network (EON) with the objective of minimizing the average resource consumption of VON request. We propose a protective algorithm, namely, coordinated mapping algorithm based on minimum spanning tree (CMST), to provide the dedicated protection against the single physical link failure. In CMST, for virtual node mapping, we not only consider the resources constraint but also the node degree constraint. For virtual link mapping, we adopt the coordinated mapping method for part of the virtual nodes and virtual links. And we provide the backup path for the minimum spanning tree link of virtual topology to reduce the resource consumption. Simulation results showed that CMST can reduce the VON request blocking probability and average network resource consumption. And it can increase the revenue of physical network.

P-28: A Gamut Mapping Algorithm Based on Partition Mapping Method

2018 ◽  
Vol 49 (1) ◽  
pp. 1300-1303
Author(s):  
Yang Rao ◽  
Yiying Pu ◽  
Shen-Sian Syu ◽  
Ming-Jong Jou
Keyword(s):  
Mapping Method ◽  
Mapping Algorithm ◽  
Gamut Mapping

scholarly journals Flexible Antennas: A Review

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 847
Author(s):  
Sharadindu Gopal Kirtania ◽  
Alan Wesley Elger ◽  
Md. Rabiul Hasan ◽  
Anna Wisniewska ◽  
Karthik Sekhar ◽  
...  
Keyword(s):  
Material Properties ◽  
Point Of Care ◽  
Comprehensive Treatment ◽  
Antenna Performance ◽  
Flexible Antennas ◽  
Communication Devices ◽  
Flexible Antenna ◽  
Materials Used ◽  
Processing Techniques ◽  
Application Specific

The field of flexible antennas is witnessing an exponential growth due to the demand for wearable devices, Internet of Things (IoT) framework, point of care devices, personalized medicine platform, 5G technology, wireless sensor networks, and communication devices with a smaller form factor to name a few. The choice of non-rigid antennas is application specific and depends on the type of substrate, materials used, processing techniques, antenna performance, and the surrounding environment. There are numerous design innovations, new materials and material properties, intriguing fabrication methods, and niche applications. This review article focuses on the need for flexible antennas, materials, and processes used for fabricating the antennas, various material properties influencing antenna performance, and specific biomedical applications accompanied by the design considerations. After a comprehensive treatment of the above-mentioned topics, the article will focus on inherent challenges and future prospects of flexible antennas. Finally, an insight into the application of flexible antenna on future wireless solutions is discussed.

scholarly journals Efficient Planar Surface-Based 3D Mapping Method for Mobile Robots Using Stereo Vision

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 73593-73601 ◽  
Author(s):  
Binghua Guo ◽  
Hongyue Dai ◽  
Zhonghua Li ◽  
Wei Huang
Keyword(s):  
Mobile Robots ◽  
Stereo Vision ◽  
Mapping Method ◽  
3D Mapping ◽  
Planar Surface

scholarly journals Design of Flexible Antenna for Wearable Applications

2020 ◽  
Vol 9 (4) ◽  
pp. 2919-2921
Keyword(s):  
Ethylene Terephthalate ◽  
High Gain ◽  
Strip Line ◽  
Gain Enhancement ◽  
Flexible Material ◽  
Poly Ethylene Terephthalate ◽  
Vivaldi Antenna ◽  
Poly Ethylene ◽  
Flexible Antenna ◽  
Strip Lines

The proposed vivaldi antenna for wearable applications is done using flexible material. The designed antenna has the length of 8 cm and width is 6 cm. For the gain enhancement, strip lines are added in the vivaldi. There are six strip lines and the length of the strip is varied. By adding the strip line, gain of the antenna is increased compared to without strip lines. It has high gain and directivity. Poly-Ethylene Terephthalate (PET) is used as a substrate for achieving the flexibility and it has high resist to moisture. It has board range of use temperature, -60 to 130°C. For every iteration, a strip line is added one by one upto six lines. The gain and directivity of the antenna is 5.4 dB for both the parameters.

scholarly journals Robust 2D Mapping Integrating with 3D Information for the Autonomous Mobile Robot Under Dynamic Environment

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1503 ◽  
Author(s):  
Bin Zhang ◽  
Masahide Kaneko ◽  
Hun-ok Lim
Keyword(s):  
Mobile Robot ◽  
Moving Objects ◽  
Three Dimensional ◽  
Dynamic Environment ◽  
Mapping Method ◽  
Research Field ◽  
Working Environment ◽  
3D Mapping ◽  
Occupancy Probability ◽  
3D Information

In order to move around automatically, mobile robots usually need to recognize their working environment first. Simultaneous localization and mapping (SLAM) has become an important research field recently, by which the robot can generate a map while moving around. Both two-dimensional (2D) mapping and three-dimensional (3D) mapping methods have been developed greatly with high accuracy. However, 2D maps cannot reflect the space information of the environment and 3D mapping needs long processing time. Moreover, conventional SLAM methods based on grid maps take a long time to delete the moving objects from the map and are hard to delete the potential moving objects. In this paper, a 2D mapping method integrating with 3D information based on immobile area occupied grid maps is proposed. Objects in 3D space are recognized and their space information (e.g., shapes) and properties (moving objects or potential moving objects like people standing still) are projected to the 2D plane for updating the 2D map. By using the immobile area occupied grid map method, recognized still objects are reflected to the map quickly by updating the immobile area occupancy probability with a high coefficient. Meanwhile, recognized moving objects and potential moving objects are not used for updating the map. The unknown objects are reflected to the 2D map with a lower immobile area occupancy probability so that they can be deleted quickly once they are recognized as moving objects or start to move. The effectiveness of our method is proven by experiments of mapping under dynamic indoor environment using a mobile robot.

A High Gain Flexible Antenna for Biomedical Applications

2020 ◽  
Author(s):  
Hanzla Dawood ◽  
Muhammad Zahid ◽  
Hamza Awais ◽  
Sultan Shoaib ◽  
Ashiq Hussain ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
High Gain ◽  
Flexible Antenna

scholarly journals Phase-3D mapping method developed from back-projection stereovision model for fringe projection profilometry

2017 ◽  
Vol 25 (2) ◽  
pp. 1262 ◽  
Author(s):  
Zewei Cai ◽  
Xiaoli Liu ◽  
Ameng Li ◽  
Qijian Tang ◽  
Xiang Peng ◽  
...  
Keyword(s):  
Mapping Method ◽  
Fringe Projection ◽  
3D Mapping ◽  
Back Projection ◽  
Fringe Projection Profilometry

Dynamic motion analysis of dart throwers motion visualized through computerized tomography and calculation of the axis of rotation

2013 ◽  
Vol 39 (4) ◽  
pp. 364-372 ◽  
Author(s):  
Y. Edirisinghe ◽  
J. M. Troupis ◽  
M. Patel ◽  
J. Smith ◽  
M. Crossett
Keyword(s):  
Three Dimensional ◽  
Mapping Method ◽  
Transverse Plane ◽  
Imaging Method ◽  
3D Mapping ◽  
3D Reconstructions ◽  
Dynamic Motion ◽  
Axis Of Rotation ◽  
Landmark Identification ◽  
Varus Angulation

We used a dynamic three-dimensional (3D) mapping method to model the wrist in dynamic unrestricted dart throwers motion in three men and four women. With the aid of precision landmark identification, a 3D coordinate system was applied to the distal radius and the movement of the carpus was described. Subsequently, with dynamic 3D reconstructions and freedom to position the camera viewpoint anywhere in space, we observed the motion pathways of all carpal bones in dart throwers motion and calculated its axis of rotation. This was calculated to lie in 27° of anteversion from the coronal plane and 44° of varus angulation relative to the transverse plane. This technique is a safe and a feasible carpal imaging method to gain key information for decision making in future hand surgical and rehabilitative practices.

Sign in / Sign up

Export Citation Format

Share Document