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Journal articles on the topic 'Omnidirectional pattern'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

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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2

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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3

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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4

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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5

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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7

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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8

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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Lertsakwimarn, Kittima, Chuwong Phongcharoenpanich, and Takeshi Fukusako. "A Low-Profile and Compact Split-Ring Antenna with Horizontally Polarized Omnidirectional Radiation." International Journal of Antennas and Propagation 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/954562.

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This paper presents a low-profile and compact printed antenna having an omnidirectional radiation pattern with horizontal polarization to the ground. The proposed antenna consists of an inner small fed ring, an outer coupled split ring, and a ground plane. The overall dimension of the proposed antenna is 45 mm × 50.5 mm × 11.6 mm (0.138λ0 × 0.155λ0 × 0.036λ0). The −10-dBS11of the antenna covers the 920-MHz RFID band, and the gain is about 1.45 dBi in the parallel direction to the ground plane. The measured results show good agreements with the simulated results. Furthermore, the reasons for th

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12

Abdou, Tarek S., and Salam K. Khamas. "A Multiband Millimeter-Wave Rectangular Dielectric Resonator Antenna with Omnidirectional Radiation Using a Planar Feed." Micromachines 14, no. 9 (2023): 1774. http://dx.doi.org/10.3390/mi14091774.

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In this study, a millimeter-wave (mmWave) dielectric resonator antenna (DRA) with an omnidirectional pattern is presented for the first time. A key feature of the proposed design is the utilization of a planar feed network to achieve omnidirectional radiation from a rectangular DRA, which has not been reported previously in the open literature. In addition, the proposed antenna offers multiband operation with different types of radiation patterns. The degenerate TE121/TE211 modes were excited at 28.5 GHz with an overall internal electromagnetic field distribution that was similar to that of th

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13

Ezzaki, Ayoub, Dirar Benkhedra, Mohamed El Ansari, and Lhoussaine Masmoudi. "Edge detection algorithm for omnidirectional images, based on superposition laws on Blach’s sphere and quantum entropy." ELCVIA Electronic Letters on Computer Vision and Image Analysis 20, no. 1 (2021): 70–83. http://dx.doi.org/10.5565/rev/elcvia.1338.

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This paper presents an edge detection algorithm for omnidirectional images based on superposition law on Bloch’s sphere and quantum local entropy. Omnidirectional vision system has become an essential tool in computer vision, duo to its large field of view. However, classical image processing algorithms are not suitable to be applied directly in this type of images without taking into account the spatial information around each pixel. To show the performance of the proposed method, a set of experimentation was done on synthetic and real images devoted to agriculture applications. Later, Fram &

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Abdulzahra, Duaa, Falih Alnahwi, and Abdulkareem Abdullah. "Design of Compact Wideband/Bi-Band Frequency Reconfigurable Antenna for IoT Applications." Iraqi Journal for Electrical and Electronic Engineering 19, no. 2 (2023): 100–109. http://dx.doi.org/10.37917/ijeee.19.2.12.

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This paper discusses the design and performance of a frequency reconfigurable antenna for Internet of Things (IoT) applications. The antenna is designed to operate on multiple frequency bands and be reconfigurable to adjust to different communication standards and environmental conditions. The antenna design consists of monopole with one PIN diode and 50Ω feed line. By changing the states of the diode, the antenna can be reconfigured to operate in a dual-band mode and a wideband mode. The performance of the antenna was evaluated through simulation. The antenna demonstrated good impedance match

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15

Hu, Wei, Tao Tang, Liangfu Peng, Maged A. Aldhaeebi, Thamer S. Almoneef, and Dongming Tang. "Design of Omnidirectional Antennas Using TM22 and Quasi-TM11 Modes with Characteristic Mode Analysis." Electronics 14, no. 7 (2025): 1480. https://doi.org/10.3390/electronics14071480.

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This study presents the design of two high-gain omnidirectional antennas with minimal pattern ripple. Antenna I is based on a conventional microstrip patch structure, while Antenna II integrates a modified design with four metal probes. Characteristic mode theory (CMT) was applied to analyze the far-field radiation patterns of both antennas, with a focus on the distinct radiation modes. The analysis revealed that Antenna I operates in the TM22 mode and Antenna II in the quasi-TM11 mode, both exhibiting omnidirectional radiation characteristics. A comparative investigation of four different fee

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16

Floc’h, Jean-Marie. "Design of Printed Dipole Array for Omnidirectional Radiation Pattern." Wireless Engineering and Technology 10, no. 02 (2019): 19–33. http://dx.doi.org/10.4236/wet.2019.102002.

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17

Malik, Jagannath, Amalendu Patnaik, and M. V. Kartikeyan. "A Compact Dual-Band Antenna With Omnidirectional Radiation Pattern." IEEE Antennas and Wireless Propagation Letters 14 (2015): 503–6. http://dx.doi.org/10.1109/lawp.2014.2370651.

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18

Chen, Xing, Kama Huang, and Xiao-Bang Xu. "A Novel Planar Slot Array Antenna With Omnidirectional Pattern." IEEE Transactions on Antennas and Propagation 59, no. 12 (2011): 4853–57. http://dx.doi.org/10.1109/tap.2011.2165481.

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19

Narbudowicz, Adam, Xiulong Bao, and Max James Ammann. "Omnidirectional microstrip patch antenna with reconfigurable pattern and polarisation." IET Microwaves, Antennas & Propagation 8, no. 11 (2014): 872–77. http://dx.doi.org/10.1049/iet-map.2013.0665.

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20

Gao, Feng, and Hucheng Sun. "A Radiation-Pattern Reconfigurable Antenna Array for Vehicular Communications." Sensors 24, no. 13 (2024): 4136. http://dx.doi.org/10.3390/s24134136.

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This paper presents a low-profile reconfigurable antenna array capable of five radiation-pattern modes for vehicular communication applications. The antenna array consists of four antenna elements, each containing four square patches. Exciting one of the square patches generates a broadside radiation. A square parasitic patch is added at the rear of the excited patch, and two square parasitic patches are placed at the front. By optimizing the design of these parasitic patches, including the treatment of center slotting and addition of shorting pins, the antenna element achieves an end-fire bea

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21

Zhuravlev, Alexander, Alexander Golovkov, Polina Terenteva, Victor Malyshev, Michail Shmyrin, and Nikolay Stenyukov. "Antenna system with omnidirectional radiation pattern for systems with phase algorithms of direction finding." ITM Web of Conferences 30 (2019): 05021. http://dx.doi.org/10.1051/itmconf/20193005021.

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Ommidirectional in azimuth plane antennas with horizontal polarization are used in communication systems of McWILL standard, digital television systems of DVB-T2 standard, radio monitoring systems, semi-active ranging using the target illumination with the television broadcast signal, and many other cases. In many cases, radar and radio monitoring systems use phase methods to determine the azimuth and elevation angle of the target. To view all azimuthal angles, ring arrays consisting of omnidirectional emitters, usually also represented by ring arrays, are used. This paper studies the characte

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22

Yagi, Yasushi, and Masahiko Yachida. "Real-Time Omnidirectional Image Sensors." International Journal of Computer Vision 58, no. 3 (2004): 173–207. http://dx.doi.org/10.1023/b:visi.0000019684.35147.fc.

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23

Goedemé, Toon, Marnix Nuttin, Tinne Tuytelaars, and Luc Van Gool. "Omnidirectional Vision Based Topological Navigation." International Journal of Computer Vision 74, no. 3 (2007): 219–36. http://dx.doi.org/10.1007/s11263-006-0025-9.

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24

Gustafson, Samantha J., Todd A. Ricketts, and Erin M. Picou. "Individual Differences Offer Insight Into Clinical Recommendations for Directional and Remote Microphone Technology Use in Children." Journal of Speech, Language, and Hearing Research 64, no. 2 (2021): 635–50. http://dx.doi.org/10.1044/2020_jslhr-20-00281.

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Purpose This study sought to evaluate the effects of common hearing aid microphone technologies on speech recognition and listening effort, and to evaluate potential predictive factors related to microphone benefits for school-age children with hearing loss in a realistic listening situation. Method Children ( n = 17, ages 10–17 years) with bilateral, sensorineural hearing loss were fitted with hearing aids set to include three programs: omnidirectional, adaptive directional, and omnidirectional + remote microphone. Children completed a dual-task paradigm in a moderately reverberant room. The

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25

Anbumani, Sivabalan, and Jothilakshmi Palanisamy. "A WIDE SPECTRUM OF HEXAGON EIGHTH MODE SUBSTRATE FOR C, S AND X BAND APPLICATIONS." DYNA 99, no. 3 (2024): 267–71. http://dx.doi.org/10.6036/10897.

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The following article explains how to make a basic ultra-wide bandwidth (UBW) wearable fractal antenna. The antenna is printed on denim fabric with a dielectric constant of 1.7 and a loss tangent of 0.02. The suggested antenna is 45 x 44.92 x 0.5 mm3. The antenna is fed by an inserted microstrip line with a decreased ground structure. It operates at ultrawide band frequencies of 4.36 GHz to 11.12 GHz. The antenna offers an omnidirectional radiation pattern with a gain of more than 2.4 dBi across the entire working band... It achieves a bandwidth of 6767 MHz. The proposed antenna possesses key

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Dangkham, Piyapong, Sitthichai Dentri, Chuwong Phongcharoenpanich, and Prayoot Akkaraekthalin. "Circularly Polarized Omnidirectional Antenna with Dipole Core and Diagonally Adjoined Parasitic Braces for ISM Band Applications." International Journal of Antennas and Propagation 2019 (August 21, 2019): 1–11. http://dx.doi.org/10.1155/2019/2463871.

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This research proposes a circularly polarized (CP) single-fed omnidirectional dipole antenna operable in 2.45 GHz frequency for the industrial, scientific, and medical (ISM) radio band applications. The proposed antenna consisted of bisectional dipole core, a pair of quarter-wave baluns, and four diagonally adjoined parasitic braces. The bisectional dipole core was utilized to improve the antenna gain and realize omnidirectional radiation pattern, and the quarter-wave baluns were to symmetrize the current on the bisectional core. The four parasitic braces collectively generated circular polari

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27

Jayakumar, I., R. Garg, B. Sarap, and B. Lal. "A conformal cylindrical microstrip array for producing omnidirectional radiation pattern." IEEE Transactions on Antennas and Propagation 34, no. 10 (1986): 1258–61. http://dx.doi.org/10.1109/tap.1986.1143743.

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28

Wei, Kunpeng, Zhijun Zhang, Zhenghe Feng, and Magdy F. Iskander. "Periodic Leaky-Wave Antenna Array With Horizontally Polarized Omnidirectional Pattern." IEEE Transactions on Antennas and Propagation 60, no. 7 (2012): 3165–73. http://dx.doi.org/10.1109/tap.2012.2196930.

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29

Zhang, Yao, Xiu Yin Zhang, and Yong-Mei Pan. "Low-Profile Planar Filtering Dipole Antenna With Omnidirectional Radiation Pattern." IEEE Transactions on Antennas and Propagation 66, no. 3 (2018): 1124–32. http://dx.doi.org/10.1109/tap.2018.2790169.

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30

Mahony, J. D. "Omnidirectional pattern directivity in the absence of minor lobes: revisited." IEEE Antennas and Propagation Magazine 40, no. 4 (1998): 76–81. http://dx.doi.org/10.1109/74.730538.

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31

Firdaus, Afrizal Yuhanef, Yulindon Yulindon, Dwiny Meidelfi, and Meza Silvana. "The Small UWB Monopole Antenna with Stable Omnidirectional Radiation Pattern." JOIV : International Journal on Informatics Visualization 6, no. 4 (2022): 815. http://dx.doi.org/10.30630/joiv.6.4.972.

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Ultra Wideband (UWB) technology is an unmodulated wireless digital communication system that uses an extremely short duration pulse to transmit information bit. Because of this pulse, the UWB system needs a very wide bandwidth. Federal Communication Commission (FCC) has regulated the 3.1 – 10.6 GHz frequency spectrum for UWB. Since FCC released this frequency, many research in telecommunication have been done on UWB systems. One of them is a development of an Antenna that is suitable for UWB devices. UWB antenna characteristics require FCC band, omnidirectional radiation pattern, and compact s

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32

Tran, Huy Hung, and Hyun Chang Park. "Wideband polarization reconfigurable circularly polarized antenna with omnidirectional radiation pattern." International Journal of RF and Microwave Computer-Aided Engineering 29, no. 6 (2019): e21708. http://dx.doi.org/10.1002/mmce.21708.

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33

Liu, Yung-Tao, Che-Wei Su, Chia-Luan Tang, Shyh-Tirng Fang, and Kin-Lu Wong. "Radiation pattern control for an on-ceiling omnidirectional monopole antenna." Microwave and Optical Technology Letters 41, no. 2 (2004): 106–8. http://dx.doi.org/10.1002/mop.20062.

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34

Yang, Lijie, Ruirui Dang, Min Li, Kailong Zhao, Chunyi Song, and Zhiwei Xu. "A Fast Calibration Method for Phased Arrays by Using the Graph Coloring Theory." Sensors 18, no. 12 (2018): 4315. http://dx.doi.org/10.3390/s18124315.

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Phased array radars are able to provide highly accurate airplane surveillance and tracking performance if they are properly calibrated. However, the ambient temperature variation and device aging could greatly deteriorate their performance. Currently, performing a calibration over a large-scale phased array with thousands of antennas is time-consuming. To facilitate the process, we propose a fast calibration method for phased arrays with omnidirectional radiation patterns based on the graph coloring theory. This method transforms the calibration problem into a coloring problem that aims at min

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Gardill, M., G. Fischer, R. Weigel, and A. Koelpin. "Single-element based ultra-wideband antenna array concepts for wireless high-precision 2-D local positioning." Advances in Radio Science 11 (July 4, 2013): 297–305. http://dx.doi.org/10.5194/ars-11-297-2013.

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Abstract. We generally categorize the approaches for ultra-wideband antenna array design, and consequently propose simplified concepts for antenna arrays for a high-precision, ultra-wideband FMCW radar 2-D local positioning system to obtain robustness against multi path interference, perform angle of arrival analysis, as well as instantaneous heading estimation. We focus on low-cost and mechanical robust, industrial-application ready antennas. The antenna arrays are optimized for operation in the 5 GHz to 8 GHz frequency range and are designed towards supporting full omnidirectional 360° as we

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Wu, Junyan, Jiaao Yu, and Qin Tao. "Design of a Missile-borne Conformal Microstrip Navigation Antenna." MATEC Web of Conferences 232 (2018): 04080. http://dx.doi.org/10.1051/matecconf/201823204080.

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A missile-borne conformal dual-fed circular polarized microstrip antenna array is designed and fabricated, which realized omnidirectional radiation in horizontal direction. Frequencies of the antenna include GPS L1 frequency (1.575GHz) and Beidou navigation system B1 frequency (1.562GHz). Based on the HFSS simulation, the influence of conformation is analyzed on S11, axial ratio and gain of antenna array. The size of microstrip patches is changed so that the influence of conformation on antenna can be reduced. The circular polarization performance and the circular polarization gain of the ante

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Xing, Zhen-hua, Zhen Wang, Hang Xu, et al. "Optimization design and development of UHF omnidirectional wideband antenna for PD detection in substation." E3S Web of Conferences 256 (2021): 01012. http://dx.doi.org/10.1051/e3sconf/202125601012.

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In order to meet the requirements of partial discharge (PD) detection of electrical equipment in substation station area, the ultra-high frequency (UHF) antenna with broadband, high gain and horizontal plane (H-plane) omnidirectional is studied and designed as a PD sensor. By analyzing the characteristic impedance and structural characteristics of the biconic antenna, it is determined to be an UHF omnidirectional wideband antenna for detecting PD. The influence of structural parameters such as half-cone angle and vertebral body height on the antenna performance is simulated. At last, a double

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Penchel, Rafael A., Sandro R. Zang, José R. Bergmann, and Fernando J. S. Moreira. "GO Shaping of Omnidirectional Dual-Reflector Antennas with Arbitrary Main-Beam Direction in Elevation Plane by Connecting Conic Sections." International Journal of Antennas and Propagation 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/1409716.

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This work discusses an alternative geometrical optics (GO) technique to synthesize omnidirectional dual-reflector antennas with uniform aperture phase distribution together with an arbitrary main-beam direction for the antenna radiation pattern. Sub- and main reflectors are bodies of revolution generated by shaped curves defined by local conic sections consecutively concatenated. The shaping formulation is derived for configurations like ADC (axis-displaced Cassegrain) and ADE (axis-displaced ellipse) omnidirectional antennas. As case studies, two configurations fed by a TEM coaxial horn are d

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Gao, Yanghua, Weidong Lou, and Hailiang Lu. "A Reconfigurable Graphene Nanoantenna on Quartz Substrate." Instrumentation Mesure Métrologie 19, no. 5 (2020): 379–83. http://dx.doi.org/10.18280/i2m.190508.

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In the terahertz (THz) band, conventional metallic antennas are virtually infeasible, due to the low mobility of electrons and huge attenuation. The existing metallic THz antennas need a high power to overcome scattering losses, and tend to have a low antenna efficiency. Fortunately, graphene is an excellent choice of miniaturized antenna in millimeter/THz applications, thanks to its unique electronic properties in THz band. Therefore, this paper presents two miniaturized reconfigurable graphene antennas, and characterizes their performance in terms of frequency reconfiguration, omnidirectiona

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Wang, Ren, Bing-Zhong Wang, Wei-Ying Huang, and Xiao Ding. "Compact Reconfigurable Antenna with an Omnidirectional Pattern and Four Directional Patterns for Wireless Sensor Systems." Sensors 16, no. 4 (2016): 552. http://dx.doi.org/10.3390/s16040552.

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Hardiwansyah, Muttaqin, Dian Neipa Purnamasari, Achmad Ubaidillah Ms, Haryanto Haryanto, and Miftachul Ulum. "Design of Rectangular Microstrip Antenna Using Inset Feed and DGS Methods for Digital Television at 598 MHz Frequency." Signal and Image Processing Letters 7, no. 1 (2025): 1–9. https://doi.org/10.31763/simple.v7i1.102.

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The development of a microstrip antenna for digital TV applications at the center frequency of 598 MHz has been carried out to meet the needs for optimal signal reception in urban areas such as Surabaya. In this research, a microstrip antenna is designed, simulated, and fabricated to verify its performance. The simulation results show that the antenna has a return loss of -12.27 dB, VSWR 1.639, bandwidth 359 MHz, gain 2.26 dBi, and an omnidirectional radiation pattern. After the fabrication process, antenna performance measurements show a return loss of -25.78 dB, VSWR 1.849, and bandwidth 154

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Li, Peng Kai, Chang Jiang You, Hong Fang Yu, and Yu Jian Cheng. "Mechanically pattern reconfigurable dual-band antenna with omnidirectional/directional pattern for 2.4/5GHz WLAN application." Microwave and Optical Technology Letters 59, no. 10 (2017): 2526–31. http://dx.doi.org/10.1002/mop.30778.

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43

Fadhil, Tamara Zuhair, Noor Asniza Murad, and Mohamad Rijal Hamid. "Broadside Gain Enhancement of Wideband Monopole Circular Shaped Antenna Using FSS for Sub-6 GHz Applications." Infocommunications journal 16, no. 3 (2024): 82–88. http://dx.doi.org/10.36244/icj.2024.3.8.

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This paper introduces a wideband circular patch antenna designed with a frequency selective surface (FSS) for sub-6 GHz applications. The proposed antenna features a monopole circular-shaped patch with a partial ground plane, delivering an omnidirectional radiation pattern in the azimuth plane, resulting in relatively uniform gain in all directions. An FSS metamaterial enhances the antenna's gain and improves the broadside radiation pattern. The design incorporates three inner circular patches connected to the main patch. The FSS utilizes hybrid square/circle loop-based unit cells. The antenna

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44

Yang, Liang, Cheng Lu, Xiao Li, Leilei Liu, and Xiaoxing Yin. "A Horizontal Azimuth Pattern-Reconfigurable Antenna Using Omnidirectional Microstrip Arrays for WLAN Application." International Journal of Antennas and Propagation 2019 (February 25, 2019): 1–9. http://dx.doi.org/10.1155/2019/8183153.

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A horizontal azimuth pattern-reconfigurable antenna with configurable parasitic element arrays for WLAN applications is proposed in this paper. It consists of a control board, a central series-fed omnidirectional microstrip array, four configurable parasitic elements, a bottom conducting plate, and a top supporting plate. The omnidirectional microstrip array is adopted as an exciter, around which the four same parasitic element arrays are arranged at four corners. The p-i-n diodes as switches are placed between the parasitic element arrays and the conducting plate to control the fifteen radiat

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Muchtadi-Alamsyah, Intan, Mohamad Nur Heriawan, Gantina Rachmaputri, Elvira Rahmadiantri, and Made Putri Lawiyuniarti. "Application of Three-Dimensional Direct Least Square Method for Ellipsoid Anisotropy Fitting Model of Highly Irregular Drill Hole Patterns." Applied Sciences 12, no. 15 (2022): 7848. http://dx.doi.org/10.3390/app12157848.

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Ellipsoid or geometric anisotropy is a widely used method in geostatistical analysis to obtain variograms with different ranges in different directions (azimuth) and relatively similar sill variance. Ellipsoid anisotropy is indispensable in mining when a resource geologist intends to understand the spatial continuity of variables related to any geological controls of the mineralization. For example, when dealing with mineralization related to tabular deposits, a porphyritic deposit with an irregular drill hole pattern (fan drilling), three-dimensional ellipsoid anisotropy is quite challenging

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Vu, K. T. C., R. V. Egorov, D. A. Mikheev, and V. L. Savvin. "Model of a spiral rectenna array with an omnidirectional radiation pattern." Bulletin of the Russian Academy of Sciences: Physics 79, no. 12 (2015): 1477–79. http://dx.doi.org/10.3103/s1062873815120242.

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Iwasaki, H., and N. Chiba. "Circularly polarised back-to-back microstrip antenna with an omnidirectional pattern." IEE Proceedings - Microwaves, Antennas and Propagation 146, no. 4 (1999): 277. http://dx.doi.org/10.1049/ip-map:19990568.

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Fereidoony, F., S. Chamaani, and S. A. Mirtaheri. "Systematic Design of UWB Monopole Antennas With Stable Omnidirectional Radiation Pattern." IEEE Antennas and Wireless Propagation Letters 11 (2012): 752–55. http://dx.doi.org/10.1109/lawp.2012.2205658.

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Yetisir, Ersin, Chi-Chih Chen, and John L. Volakis. "Wideband Low Profile Multiport Antenna With Omnidirectional Pattern and High Isolation." IEEE Transactions on Antennas and Propagation 64, no. 9 (2016): 3777–86. http://dx.doi.org/10.1109/tap.2016.2583468.

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Chen, S. L., K. H. Lin, and R. Mittra. "Miniature and near-3D omnidirectional radiation pattern RFID tag antenna design." Electronics Letters 45, no. 18 (2009): 923. http://dx.doi.org/10.1049/el.2009.1873.

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