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Littérature scientifique sur le sujet « Omnidirectional pattern »

Auteur : Grafiati

Publié le 3 juin 2025

Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "Omnidirectional pattern"

Ding, Rong, and Ran Dong Xiao. "Directional Pattern versus Omnidirectional Pattern of Switched Beamform Antennas for Asymptotic Connectivity." Applied Mechanics and Materials 235 (November 2012): 147–51. http://dx.doi.org/10.4028/www.scientific.net/amm.235.147.

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The connectivity of wireless networks is important for data transmission. Gupta and Kumar have already proved that if n nodes with omnidirectional antennas are located randomly, uniformly in a disk of unit area, the critical transmission range to achieve asymptotic connectivity is O( )[1]. In this work, we studied the network connectivity where nodes equipped with switched beamform antennas are randomly and uniformly distributed in a disc of unit area in R2, the antenna can be modeled in omnidirectional and directional patterns. We ﬁrst assume that nodes in the network cooperate in routing eac

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Malik, J., D. Nagpal, and M. V. Kartikeyan. "MIMO antenna with omnidirectional pattern diversity." Electronics Letters 52, no. 2 (2016): 102–4. http://dx.doi.org/10.1049/el.2015.3063.

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Moradi, Karim, Mohsen Fathian, and Saeed Shiry Ghidary. "Omnidirectional walking using central pattern generator." International Journal of Machine Learning and Cybernetics 7, no. 6 (2014): 1023–33. http://dx.doi.org/10.1007/s13042-014-0307-4.

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Yokoo, Yuji, and Hiroyuki Arai. "Multifrequency loop slot antenna with omnidirectional pattern." Electronics and Communications in Japan (Part I: Communications) 90, no. 2 (2006): 23–32. http://dx.doi.org/10.1002/ecja.20302.

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Luciarini, Manuel, Domenico Gaetano, Christian Canestri, Cosmo Mitrano, Walter Fuscaldo, and Alessandro Galli. "A Wideband Tightly Coupled Array for Omnidirectional Pattern Synthesis." International Journal of Antennas and Propagation 2022 (April 22, 2022): 1–9. http://dx.doi.org/10.1155/2022/5051710.

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This work presents the design of a wideband circular tightly coupled array for omnidirectional pattern generation. The proposed array works over an 8:1 bandwidth, providing very high performance in terms of active reflection coefficient, realized gain, and omnidirectional patterns with reduced ripples. The array is composed of 32 low-profile, self-complementary, bow-tie elements displaced around a metallic mast. The capacitive coupling between neighbouring elements and the implementation of a properly designed frequency selective surface allow for increasing the electrical length of each anten

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Ghiasi Shirazi, Sayed Kamaledin, and Reza Safabakhsh. "Omnidirectional edge detection." Computer Vision and Image Understanding 113, no. 4 (2009): 556–64. http://dx.doi.org/10.1016/j.cviu.2009.01.001.

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Geyer, Christopher, and Kostas Daniilidis. "Omnidirectional video." Visual Computer 19, no. 6 (2003): 405–16. http://dx.doi.org/10.1007/s00371-003-0204-4.

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Zhang, Honglin, Zhenzhan Fu, Binjie Hu, Zhijian Chen, Shaowei Liao, and Bing Li. "Wideband Omnidirectional Antenna Featuring Small Azimuthal Gain Variation." Micromachines 14, no. 12 (2023): 2218. http://dx.doi.org/10.3390/mi14122218.

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Wideband omnidirectional antennas are essential components in radio monitoring and communication systems, enabling the reception of signals from all directions over a wide bandwidth. This paper presents a novel wideband omnidirectional antenna design that achieves a 1-dB gain variation across its azimuthal plane within a bandwidth of 1.8 GHz to 7.77 GHz. The antenna’s exceptional performance is attributed to two flower-bud-shaped monopoles that, through pattern superposition, generate a wideband omnidirectional radiation pattern. Analysis shows that the use of a circular ground plane also redu

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Song, Hai-Na, Zhao-Hui Chen, and Jian-Feng Li. "A Triband Patch Antenna with Monopole-like and Patch-like Radiation Patterns for Multifunctional Wireless Systems." International Journal of Antennas and Propagation 2020 (June 11, 2020): 1–12. http://dx.doi.org/10.1155/2020/3268729.

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A triband patch antenna with monopole-like and patch-like radiation patterns for multifunctional wireless systems is proposed. The antenna consists of a single square radiation patch with an annular slot, a ground plane, and a top-loaded metal sheet. The top-loaded metal sheet is shorted to the ground plane for producing a zeroth-order resonant (ZOR) mode, which has an omnidirectional radiation pattern at the lowest operation band, and its performance is robust to the location of the probe feed. With the annular slot and the off-center probe feed, a dual-resonant TM01 mode is excited, yielding

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Juang, Jih-Gau, and Chang-Yen Yang. "DOCUMENT DELIVERY ROBOT BASED ON IMAGE PROCESSING AND FUZZY CONTROL." Transactions of the Canadian Society for Mechanical Engineering 40, no. 5 (2016): 677–92. http://dx.doi.org/10.1139/tcsme-2016-0055.

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The objective of this study is to integrate image processing, pattern recognition, RFID, and fuzzy theory into an omnidirectional wheeled mobile robot for receiving and delivering documents between rooms. In image pre-processing, the Hue-Saturation-Lightness color space is applied to avoid light interference, and then grayscale image threshold is used to obtain binary image. The median filter is utilized to filter the noises of speckle and salt-and-pepper, so color segmentation is then applied to capture desired color for tracking control. Pattern recognition is performed by the Adaptive Reson

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Thèses sur le sujet "Omnidirectional pattern"

Goncharova, Iuliia. "Investigation of a small-sized omnidirectional antenna." Thesis, Linnéuniversitetet, Institutionen för datavetenskap, fysik och matematik, DFM, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-17835.

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The purpose of this research is to find ways to create an omnidirectional antenna with high directivity in the vertical plane. The investigation is based on computer simulation using the program CST 2011. The objective is a narrow-band antenna that is omnidirectional in the horizontal plane and has maximum achievable directivity for a fixed size. Three of the most promising antenna designs are selected based on the current state of antenna technology. Their maximum directivities are estimated by means of well known relations in antenna theory. It is shown that the most suitable design is an om

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Henning, Timothy Paul. "Dynamics and controls for an omnidirectional robot." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1175093596.

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Miřácký, Jan. "Návrh anténní jednotky přístupového bodu pro off-body komunikaci v ISM pásmu 61 GHz." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221250.

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The Master´s thesis deals with the theoretical design, practical numerical analyses and optimalization of disc-like antenna and disc-like slot antenna. The antennas have relative omnidirectional radiation characteristics in the horizontal plane, respectively in the vertical plane. Antennas exploit the substrate integrated waveguide technology. The antennas themselves are designed for the purpose of making the antenna array that will be work as an antenna unit for access point. The antennas are manufactured and experimentally verified. The program CST Microwave Studio is used for simulation in

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Positano, Francesco. "Antennes reconfigurables pour réseaux IoT modernes : principes de conception et stratégies de mise en œuvre." Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ4062.

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La croissance rapide des applications de l’Internet des objets (IoT) a entrainé une forte demande en technologies sans fil avancées. Dans le contexte d’un paysage numérique en constante évolution, les antennes reconfigurables sont devenues un point focal crucial en raison de leur nature adaptable. Ce travail offre un aperçu complet du paysage actuel des technologies IoT et sans fil, en mettant l’accent sur les normes compatibles avec l’IoT et la manière dont elles ont influencé la conception des antennes. Cette recherche explore les défis de la conception, de l’optimisation et de la mise en œu

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Lai, Sheng-Lin, and 賴聖霖. "Human and Omnidirectional Service Robot Interactions by Face Expression Recognition with Improved Local Binary Pattern and Localization with Depth Image." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ths24t.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>107<br>By using the RGB-D camera, the omnidirectional service robot (ODSR) searches and detects the human with his/her hand gesture over a specific time interval. After the hand gesture has been detected when ODSR neighbor the detected human between 3m, the RGB-D camera’s depth image will estimate the coordinate of the detected human. Then the ODSR will also receive that information and reaches the position 0.75-1.25m with respect to human and -29°~29° with respect to the camera optical axis such that his/her six face expressions (e.g., anger, disgust, fear, happy, s

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Zhu, Shaozhen (Sharon), Tahereh S. Ghazaany, Raed A. Abd-Alhameed, et al. "Improved bandwidth low-profile miniaturized multi-arm logarithmic spiral antenna." 2014. http://hdl.handle.net/10454/10834.

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Chapitres de livres sur le sujet "Omnidirectional pattern"

Manaswini, P., S. Ashok Kumar, and T. Shanmuganantham. "A Reduced Planar Omnidirectional MIMO Antenna for Pattern Phase Variety." In Lecture Notes in Electrical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3992-3_33.

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González-Aguilar, Jacinto, Oscar Castillo, and Prometeo Cortés-Antonio. "Implementation a Fuzzy System for Trajectory Tracking of an Omnidirectional Mobile Autonomous Robot." In Hybrid Intelligent Systems in Control, Pattern Recognition and Medicine. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-34135-0_23.

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Ishiguro, Hiroshi. "OMNIDIRECTIONAL VISION." In Handbook of Pattern Recognition and Computer Vision. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812775320_0033.

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van den Heuvel, Jan, and Colin McDiarmid. "Channel Assignment on Infinite Sets Under Frequency—Distance Constraints." In Methods and Algorithms for Radio Channel Assignment. Oxford University PressOxford, 2002. http://dx.doi.org/10.1093/oso/9780198503149.003.0005.

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Abstract Large-scale radio systems for multiple users, such as those used in mobile phone networks, are often based on a cellular structure (MacDonald 1979; Hale 1980; Macario 1997). The service area is divided into cells and each cell is serviced by one transmitter, which communicates with users within the cell using a particular radio channel or set of channels. In any particular application the available channels are uniformly spaced in the spectrum, justifying integer labellings of these channels. It is often assumed, at least as a starting position, that the transmitters all have the same

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Bacca Bladimir, Salvi Joaquím, and Cufí Xavier. "Appearance-Based SLAM for Mobile Robots." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2009. https://doi.org/10.3233/978-1-60750-061-2-55.

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This paper reviews new challenges in the area of long-term navigation, and new approaches to environment representation and robots capable of coping with dynamic environments. As a result of this review, we propose an appearancebased simultaneous localization and mapping (SLAM) solution which represents the robot environment using an appearance-based topological map. Dynamic environment changes are dealt with using human memory and fixed action pattern concepts. The former is used to build a histogram to register local feature stability, the latter for robot navigation purposes. We take omnidi

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Gonzales Palacios, Orlando Francois, Ricardo Erick Diaz Vargas, Patrick H. Stakem, and Carlos Enrique Arellano Ramirez. "Koch Snowflake Fractal Antenna Design in the Deep Space Bands for a Constellation of Cubesat Explorers." In Proceedings of CECNet 2021. IOS Press, 2021. http://dx.doi.org/10.3233/faia210419.

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This paper presents the design and simulation of a Koch curve fractal antenna, developed according to the second iteration of the Koch snowflake fractal for S-band, C-band, X-band and Ku-band. The simulated antenna shows good performance for the operating frequencies and desirable gain, bandwidth and VSWR parameters. Being a compact antenna, it has a size, geometry and characteristics that go in accord with the CubeSat’s structure standards. The antenna was fabricated on a 1.5 mm thick FR-4 substrate. The VSWR achieved values are lower than 1.4 for the frequencies used (2.1 GHz to 2.4 GHz and

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Jayananda Singh, Samom, Rajesh Kumar, and M. M. Dixit. "Study Analysis of Printed Monopole Antenna for C and X Band Application." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2022. http://dx.doi.org/10.3233/faia220525.

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In this design, dimension of the proposed antenna is 20 × 25 × 1.6 mm3 with FR4 substrate having circular patch fed with co-planar waveguide (CPW) that operates at numerous resonance frequencies between 5 and 10 GHz. The proposed antenna can be used well for low range communication transceivers in the C and X bands, according to simulation results. The optimal parameters for UWB antenna are the fractional bandwidth, which should be greater than 85%, and VSWR, which is another parameter. For the best and most efficient technique of using printed monopole antenna, the range of Ultra wideband (UW

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Mujawar, Mehaboob, and Subuh Pramono. "Design of a Wearable Antenna Using Metamaterials." In Advances in Chemical and Materials Engineering. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-2659-6.ch001.

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This study focused on developing and testing a flexible dual-band (2.4 GHz, 5.2 GHz) wearable dipole antenna, examining its return loss, gain pattern, and specific absorption rate (SAR) under different bending scenarios (E-plane, H-plane) across various human body regions such as the arms and legs. The antenna utilized felt, a clothing material, as a dielectric, and Zelt as a conducting patch to ensure flexibility and conformity. By maintaining resonant frequencies as required, the design prevented detuning during wearable use. Furthermore, compared to traditional designs, the antenna exhibite

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Actes de conférences sur le sujet "Omnidirectional pattern"

Liu, Yuanyuan, and Yan Wang. "Omnidirectional Horizontally Polarized Antenna with Pattern Reconfigurability." In 2024 IEEE MTT-S International Wireless Symposium (IWS). IEEE, 2024. http://dx.doi.org/10.1109/iws61525.2024.10713694.

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Zhang, Yuan, Dongjun Wang, Longjian Zhou, Qiang-Ming Cai, Yan-Wen Zhao, and Jun Hu. "An Embedded Triband Shared-Aperture Antenna with Omnidirectional Radiation Pattern." In 2024 Photonics & Electromagnetics Research Symposium (PIERS). IEEE, 2024. http://dx.doi.org/10.1109/piers62282.2024.10618333.

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Pasetto, Tadeu Pires, and Hugo Enrique Hernández-Figueroa. "Design of a Slotted SIW Antenna with Omnidirectional Azimuth Pattern and Cosecant Squared Elevation Pattern." In 2024 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS). IEEE, 2024. http://dx.doi.org/10.1109/wmcs62019.2024.10619033.

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Choi, Dongyoung, Hyeonjoong Jang, and Min H. Kim. "OmniLocalRF: Omnidirectional Local Radiance Fields from Dynamic Videos." In 2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2024. http://dx.doi.org/10.1109/cvpr52733.2024.00656.

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Zulueta, Sandra, Yair Zárate, and Francisco Pizarro. "3D-printed Dielectric Resonator Antenna with Omnidirectional Radiation Pattern and Circular Polarization." In 2024 IEEE 1st Latin American Conference on Antennas and Propagation (LACAP). IEEE, 2024. https://doi.org/10.1109/lacap63752.2024.10876373.

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Kim, Hakyeong, Andreas Meuleman, Hyeonjoong Jang, James Tompkin, and Min H. Kim. "OmniSDF: Scene Reconstruction Using Omnidirectional Signed Distance Functions and Adaptive Binoctrees." In 2024 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2024. http://dx.doi.org/10.1109/cvpr52733.2024.01912.

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Yu, Dingyang, Yuanrong Zhong, Qi Chen, et al. "Design of Biomimetic Robotic Eel with Omnidirectional Wiredriven Body and Controlled Central Pattern Generator (CPG)." In 2025 5th International Conference on Computer, Control and Robotics (ICCCR). IEEE, 2025. https://doi.org/10.1109/icccr65461.2025.11072624.

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Wang, Kang, RongLin Li, and Yuehui Cui. "Pattern Reconfigurable Patch Antenna with Conical and Omnidirectional Radiation patterns." In 2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2023. http://dx.doi.org/10.1109/apcap59480.2023.10469717.

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Hu, Bo, Feihong Tang, Peng Chen, and Xutao Yu. "Fractal UWB patch antenna with omnidirectional pattern." In 2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2017. http://dx.doi.org/10.1109/apcap.2017.8420579.

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Sun, Xiaopeng, Weiqi Li, Zhenyu Zhang, et al. "OPDN: Omnidirectional Position-aware Deformable Network for Omnidirectional Image Super-Resolution." In 2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW). IEEE, 2023. http://dx.doi.org/10.1109/cvprw59228.2023.00136.

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