Relevant bibliographies by topics / Directivity etc

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Directivity etc'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "Directivity etc"

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MAILLOU, Balbine, and Joël DUCOURNEAU. "Development of an experimental technique for measuring polar diagrams of adaptive directivity implemented in hearing aids." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 8 (2024): 3669–80. http://dx.doi.org/10.3397/in_2024_3357.

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Nowadays, hearing aids have efficient signal processing options to improve speech intelligibility in noise. This work concerns the characterization of the microphone systems directivity available in hearing aids. In recent decades, "adaptive" directivities have been implemented in hearing aids, thus making it possible to focus on useful sound sources in the hearing aid patient environment. These options use the principles of sound environments detection, acoustic beamforming and noise reduction. Performances of these options can be estimated with subjective methods (as speech audiometry in noi
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Chen, Nuo, and Yuan Gao. "A port and starboard fuzziness suppressed algorithm based on vector directivity zero." Journal of Physics: Conference Series 2595, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1742-6596/2595/1/012009.

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Abstract Conventional linear array based on acoustic pressure hydrophone can not distinguish the target signal from the port side, so it can not locate the target accurately. The vector hydrophone has natural directivity and can be resolved from starboard to starboard after being formed. However, in practical engineering, it is necessary to further improve the resolution of starboard to starboard because of noise or interference, etc. A new method of port and starboard suppression based on directivity of vector linear array is proposed. The simulation results show that the starboard suppressio
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Ferdous, Md Jannatul, Nayan Sarker, Chinmoy Das, Md Tabil Ahammed, and Zayed Mohammad. "Design and Analysis of A High Frequency Bow-tie Printed Ridge Gap Waveguide Antenna." Journal of Image Processing and Intelligent Remote Sensing, no. 22 (March 11, 2022): 11–23. http://dx.doi.org/10.55529/jipirs.22.11.23.

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Millimeter and microwave wave components are in high demand, which will have a substantial influence on the development of 5G networks. In this work, Ridge Gap Waveguide is used to develop a planar high-gain antenna. The main objective of this study is to develop a wideband, high-gain antenna capable of supporting the expected need for high data transmission in the future. For this reason, a thorough examination of PRGW has been presented, along with a series of high-gain antenna designs that have been extensively tested. In the future, this antenna array might be used for 5G connectivity, and
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Ferdous, Md Jannatul, Nayan Sarker, Chinmoy Das, Md Tabil Ahammed, and Zayed Mohammad. "Design and Analysis of A High Frequency Bow-tie Printed Ridge Gap Waveguide Antenna." Journal of Image Processing and Intelligent Remote Sensing, no. 22 (March 11, 2022): 26–38. http://dx.doi.org/10.55529/jipirs.22.26.38.

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Millimeter and microwave wave components are in high demand, which will have a substantial influence on the development of 5G networks. In this work, Ridge Gap Waveguide is used to develop a planar high-gain antenna. The main objective of this study is to develop a wideband, high-gain antenna capable of supporting the expected need for high data transmission in the future. For this reason, a thorough examination of PRGW has been presented, along with a series of high-gain antenna designs that have been extensively tested. In the future, this antenna array might be used for 5G connectivity, and
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Diksha, Sharma Rupesh Yadav Sanjay Chouhan. "PERFORMANCE COMPARISON OF THE SMART ANTENNA USING PSO AND BB-BC BASED OPTIMIZATION TECHNIQUE." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 5 (2017): 730–35. https://doi.org/10.5281/zenodo.801291.

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The electromagnetic power is an important term for wireless communication system. Which tells about the efficiency of the communication and its life in case of battery based communication setup. The reception in the desired direction is important for communication architecture. Hence the directivity and side lobes levels are two important parameters in the antenna system of wireless communication. In this paper the side lobes level reduction with the evolutionary optimization techniques has been given. PSO and BBBC techniques have been used for optimization. The optimization curve and resulted
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Arti, Namdeo* Sanjay Chouhan. "PERFORMANCE ANALYSIS OF THE MFO BASED BEAM STEERING FOR CIRCULAR ANTENNA ARRAY." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 6 (2017): 107–12. https://doi.org/10.5281/zenodo.805367.

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The basic property of an antenna is to transmit and receive energy signal in one/all direction. This fundamental property is directivity. While antenna designing an antenna, this is the most important factor that counts for an antenna performance. Hence, its optimization is always given importance. There are so many processes available that are used for optimization of an antenna pattern yet no one out of them provides satisfactorily results by reducing all noise parameters. Depending upon, there are a number of experimentation tools and theories available to optimize the antenna array design
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Lu, Ping, Zhiwei Liu, Enpu Lei, Kama Huang, and Chaoyun Song. "Superdirective Wideband Array of Circular Monopoles with Loaded Patches for Wireless Communications." Sensors 23, no. 18 (2023): 7851. http://dx.doi.org/10.3390/s23187851.

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A wideband superdirective array, composed of a two-element circular monopole configuration, is introduced. The monopoles are placed in close proximity, facing each other on a metal ground. To ensure good matching at high frequencies, two pairs of elliptical patches are added to the sides of the monopoles, enhancing the surface current of the circular patch for wideband performance. To achieve equal amplitude excitation and the desired phase difference, a wideband power divider with a phase shifter is designed to feed the antenna array. Simulation and measurement results demonstrate that the pr
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Ramya, M., V. Parthipan, and M. Yogadeepan. "Certain Investigations on Edge Fed Microstrip Patch Array Antenna for WiMAX Applications." Asian Journal of Electrical Sciences 4, no. 1 (2015): 1–7. http://dx.doi.org/10.51983/ajes-2015.4.1.1937.

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Recently, a new wireless technology, i.e., Worldwide interoperability for Microwave Access (WiMAX), has been demonstrated to have its strong potential to provide a very high speed of broadband services. By simultaneously using multiple antennas at transmitter and receiver sites, these systems exploit the spatial dimension of the propagation channel. The development of such antennas includes the design of array antenna, optimizing the array antenna parameters and thereby increasing its performance. This paper mainly focuses on design of single microstrip patch antennae and linear array configur
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Kate, Meenal, and Anjana Goen. "Comparison and Performance Evaluation on Microstrip Patch Antenna for WLAN Application." International Journal of Electrical and Electronics Research 4, no. 3 (2016): 80–84. http://dx.doi.org/10.37391/ijeer.040304.

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This paper present a comparative study between two works proposed for microstrip patch antenna dual band operations. The comparison is made between a dual-band planar antenna with a compact radiator for 2.4/5.2/5.8-GHz Wireless Local Area Network (WLAN) applications and a printed circular microstrip patch antenna with a four rectangular shape strip and co planar rectangular ground plane antenna. The comparative analysis between these two antennas consist of following parameters such as dimensions, bandwidth, gain, return loss, directivity etc.
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Saxena, Anurag, Vinod Kumar Singh, Akanksha Lohia, and Mohd Faisal. "A Jawbreaker-Shaped Fragmentary Ground Textile Flexible Antenna." International Journal of Electronics, Communications, and Measurement Engineering 9, no. 2 (2020): 17–29. http://dx.doi.org/10.4018/ijecme.2020070102.

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Under this article, a jawbreaker-shaped textile antenna is designed for assortment applications like satellite communication, security system, medical, etc. For the antenna to be wearable, jeans substrate is used in place of FR-4 material so that it can easily bend. After simulating in CST software, the resonant frequency is 7.5 GHz under which it covers the range of 5.37 GHz to 8.36 GHz frequency. The simulating result of proposed antenna shows high efficiency, better directivity, and radiation pattern. The overall bandwidth of proposed antenna is 27.07%.
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Dissertations / Theses on the topic "Directivity etc"

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Bodon, K. Joshua. "Development, Evaluation, and Validation of a High-Resolution Directivity Measurement System for Played Musical Instruments." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/5653.

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A high-resolution directivity measurement system at Brigham Young University has been renovated and upgraded. Acoustical treatments have been installed on the microphone array, professional-grade audio hardware and cabling have been utilized, and user-friendly MATLAB processing and plotting codes have been developed. The directivities of 16 played musical instruments and several loudspeakers have been measured by the system, processed, and plotted. Using loudspeakers as simulated musicians, a comprehensive analysis was completed to validate the system and understand its error bounds. A compari
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Sterba, Ron. "Distortion directivity and circuit modeling of a needle array plasma loudspeaker." Ohio : Ohio University, 1991. http://www.ohiolink.edu/etd/view.cgi?ohiou1183749470.

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Eyring, Nicholas J. "Development and Validation of an Automated Directivity Acquisition System Used in the Acquisition, Processing, and Presentation of the Acoustic Far-Field Directivity of Musical Instruments in an Anechoic Space." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4004.

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A high spatial resolution acoustic directivity acquisition system (ADAS) has been developed to acquire anechoic measurements of the far field radiation of musical instruments that are either remote controlled or played by musicians. Building upon work performed by the BYU Acoustic Research Group in the characterization of loudspeaker directivity, one can rotate a musical instrument with sequential azimuthal angle increments under a fixed semicircular array of microphones while recording repeated notes or sequences of notes. This results in highly detailed and instructive directivity data prese
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Mobley, Frank Spencer. "Further development of 3-D rotary-wing acoustic directivity using a spherical harmonic representation." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1335543552.

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Woolston, Scott Richard. "Development of Methods to Propagate Energy Density and Predict Farfield Directivity Using Nearfield Acoustic Holography." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1726.

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Acoustical-based imaging systems have found merit in determining the behavior of vibrating structures. This thesis focuses on the continued development of the nearfield acoustic holography (NAH) approach. Conventional NAH consists of first measuring the pressure field on a two-dimensional conformal surface and then propagating this data back to the vibrating structure to obtain information about the source, such as the normal velocity distribution. Recent work has been done which incorporates particle velocity information into the traditional NAH measurements to reduce the number of measuremen
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Varada, Vijay K. "Acoustic Localization Employing Polar Directivity Patterns of Bidirectional Microphones Enabling Minimum Aperture Microphone Arrays." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290118825.

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Woolston, Scott R. "Development of methods to propagate energy density and predict farfield directivity using nearfield acoustic holography /." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3016.pdf.

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Weiler, Bradley. "Finite Element Method Based Analysis and Modeling in Rotordynamics." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1510917784717535.

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Mieskoski, Randy. "Capturing and Modeling a Three-Dimensional Stationary Noise Source Directivity Pattern with a Dynamic Array in the Near Field." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1387979181.

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Wallace, Jon. "Modeling Electromagnetic Wave Propagation in Electrically Large Structures." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/91.

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Existing unified numerical electromagnetic methods are often unable to analyze electrically large structures due to the amount of memory and processing power required, necessitating approximate analyses with limited applicability. In this research a hybrid modeling methodology is adopted to solve these complex problems more efficiently than unified numerical methods and more accurately than analytical methods. Electromagnetic modeling problems are divided into two or more levels of scale. Each level analyzes a specific level of detail and only promotes the required information to the next leve
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Book chapters on the topic "Directivity etc"

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Sarkar, Swagata, Sivakami Nagappan, and Shafin Kadhir Badhusha. "Design and Analysis of 64 GHz Millimetre Wave Microstrip Patch Antenna." In Recent Trends in Intensive Computing. IOS Press, 2021. http://dx.doi.org/10.3233/apc210262.

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Millimetre Wave frequencies (30–300 GHz) can be used for different major applications of modern world like telecommunications, security screening, imaging, automotive radars, military applications, remote sensing, radio astronomy and many more. The internationally reserved frequency spectrum is used for Radio Frequency Energy. In this work 64 GHz antennas are compared with different design and a comparative study is taken. In this work Microstrip patch antenna with carpet architecture, and fractal island are designed and compared. The general comparative parameters for antenna are directivity,
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K. C, Rajarajeshwari, Saravanakumar N, Poornima T, and Gokul Anand K. R. "ANTENNA TRENDS IN THz COMMUNICATION." In Futuristic Trends in Network & Communication Technologies Volume 3 Book 2. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bgnc2p10ch5.

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Terahertz range lies between microwave band (<100GHz) to far Infra-Red band (>10THz) range. The actual range of Terahertz is 0.3 to 3THz and the radiation occurs about 1millimeter, hence called as sub-millimetre band/wave which are usually short wavelengths. Normal antenna designs can be made as per our requirement, but coming to THz antenna the case is entirely different. It has to be designed, constructed, and fabricated with lot of limitations and constraints. They have many challenges related to high performance like high data rates (Tbps), proper spectrum allocation, high gain, high
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Conference papers on the topic "Directivity etc"

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Blaunstein, N., Z. Dank, and M. Zilbershtein. "Radiation Directivity of a Buried Leaky Coaxial Cable in a Guided Radar System." In 1998_EMC-Europe_Roma. IEEE, 1998. https://doi.org/10.23919/emc.1998.10791753.

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Höijer, M., V. Isovic, and M. Bäckström. "A Heuristic Statistical Method to Tackle that no Information of the Partial Directivity Properties of the Equipment Under Test is Given from Testing in the Reverberation Chamber." In 2004_EMC-Europe_Eindhoven. IEEE, 2004. https://doi.org/10.23919/emc.2004.10805838.

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Baskar, Subramaniyan, Vivek Lingala, and Kumar Raju. "Numerical Investigation on the Design and Development of Automotive Exhaust Muffler –A Case Study." In International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility. SAE International, 2023. http://dx.doi.org/10.4271/2023-28-0085.

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<div class="section abstract"><div class="htmlview paragraph">Attaining better acoustic performance and back-pressure is a continuous research area in the design and development of passenger vehicle exhaust system. Design parameters such as tail pipe, resonator, internal pipes and baffles, muffler dimensions, number of flow reversals, perforated holes size and number etc. govern the muffler design. However, the analysis on the flow directivity from tail pipe is limited. A case study is demonstrated in this work on the development of automotive muffler with due consideration of back
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Chattopadhyay, S., A. Chin, E. Glover, et al. "Femtosecond X-rays by Orthogonal Thomson Scattering." In High Resolution Fourier Transform Spectroscopy. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/hrfts.1994.wd4.

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Scattering of femtosecond optical and near infrared pulses off a low energy relativistic electron beam at 90° offers an interesting possibility to generate ultrashort pulses of x-rays. The x-ray pulses are short since the electron beam can be squeezed and focussed hard transversely, thus matching the interaction time with the femtosecond optical pulse duration. This is difficult with collinear scattering since electron beams with lengths less than a few picoseconds are hard to produce. The method has some intrinsic attractive features, e.g. simplicity of concept, directivity, tunability, etc.
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Yildirim, Bahadir S., and Kutlu Karayahsi. "Broadband UHF Directional Coupler with High Directivity." In 2019 Fifth International Electromagnetic Compatibility Conference (EMC Turkiye). IEEE, 2019. http://dx.doi.org/10.1109/emcturkiye45372.2019.8976023.

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Bucker, M., and J. Gerling. "Investigations on the directivity of common mode excitation." In 2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03. IEEE, 2003. http://dx.doi.org/10.1109/icsmc2.2003.1429108.

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Wang, Xiaowei, and Ralf Vick. "Influencing factors on the directivity estimates of an electrically large EUT." In 2016 International Symposium on Electromagnetic Compatibility - EMC EUROPE. IEEE, 2016. http://dx.doi.org/10.1109/emceurope.2016.7739280.

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Wang, Xiaowei, and Ralf Vick. "Directivity and effective radius of an electrically large EUT with attached wires." In 2015 IEEE International Symposium on Electromagnetic Compatibility - EMC 2015. IEEE, 2015. http://dx.doi.org/10.1109/isemc.2015.7256390.

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Endo, Kota, Yusuke Yano, and Osami Wada. "Dimension Dependence of Transfer Characteristics of Tubular Wave Coupler and Improvement of Directivity." In 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE. IEEE, 2020. http://dx.doi.org/10.1109/emceurope48519.2020.9245867.

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Kantartzis, Nikolaos V., Traianos V. Yioultsis, and Theodoros I. Kosmanis. "Miniaturized directivity-adjustable antennas for enhanced vehicular wireless communications and EMC-optimized automotive electronics." In 2014 International Conference on Connected Vehicles and Expo (ICCVE). IEEE, 2014. http://dx.doi.org/10.1109/iccve.2014.7297584.

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Reports on the topic "Directivity etc"

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Watson-Lamprey, Jennie. Capturing Directivity Effects in the Mean and Aleatory Variability of the NGA-West2 Ground-Motion Prediction Equations. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2018. http://dx.doi.org/10.55461/usop6050.

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We expect there to be locations around a rupture that experience both positive and negative directivity effects more than others. The concept was to develop a simple model of additional mean and standard deviation to add to existing published ground motion prediction equations to account for this. The directivity effect predicted by Chiou and Youngs [2014] using the directivity parameter DPP [Spudich et al. 2013] was selected as the basis for the model. A suite of rupture geometries for strike-slip and reverse ruptures was generated and the mean and standard deviation of the change in the 5% d
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