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Dissertations / Theses on the topic 'Antenna testing'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Kujiraoka, Scott R., and Rick Davis. "DESIGN AND APPLICATION OF ANTENNA COUPLERS FOR CERTIFICATION OF AIRBORNE INSTRUMENTATION ANTENNAS." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608435.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Instrumentation antennas installed on missiles and airborne targets are required to be tested and certified prior to flight. The antenna coupler is a means of certifying that the antenna is in proper working condition prior to deployment, as damage to the antennas may have occurred during transportation or installation. This coupler also provides a low cost means to evaluate and monitor the antenna throughout the various stages of design and assembly. These antenn

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2

GIORDANENGO, GIORGIO. "Hybrid Measurement/Simulation Approaches for Antenna Testing." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2643123.

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This work investigate the performance of a set of techniques to reduce the number of measurement points and then the associated measurement time, by introducing a set of algorithms able to perform fast antenna testing by mixing together measurements and simulations. More specifically, the following points will be investigated: 1) introduction of a new hybrid system that joins suitable simulations of the Device Under Test (DUT) and measured data; 2) definition of suitable metrics to evaluate the performance of the reconstructions; 3) introduction of a probe compensation technique able to tak

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RAZZAQ, ABDUL. "Miniaturized antenna design & Radiation pattern corrections in Fresnel region." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2587158.

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In this thesis, two research problems have been addressed. Electronic devices require an ever increasing reduction of size and hence the important communication component i.e., the antenna needs to be miniaturized as well to cope up with other technologies. Addressing this problem, in first part of the thesis, a miniaturized antenna was designed and fabricated after analysis for its proper positioning on the PCB. Also, an analysis was done to see the effect on the resonance of the radiating element due to the proximity of other components present on the same PCB. In in this part of the thesis,

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4

Leatherwood, Daniel Aaron. "Plane wave, pattern subtraction, range compensation for spherical surface antenna pattern measurements." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/14683.

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5

Hearn, Christian W. "Electrical Design and Testing of an Uplink Antenna for Nanosatellite Applications." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/35286.

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Virginia Tech, Utah State University, and the University of Washington were teamed to form the Ionospheric Observation Nanosat Formation to investigate formation-flying requirements for multiple spacecraft missions. A communication subsystem for the mission will comprise an uplink, downlink and a satellite-to-satellite crosslink. A linearly polarized resonant loop antenna mounted above the bottom surface of the spacecraft was selected for a possible satellite uplink receive antenna. The resonant loop was chosen to satisfy the physical requirements of the spacecraft whild still achieving eff

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Richards, O. "An investigation of microstrip antennas and their feeder structures." Thesis, Bangor University, 1988. https://research.bangor.ac.uk/portal/en/theses/an-investigation-of-microstrip-antennas-and-their-feeder-structures(5c001159-fd50-43ba-b2bd-5727e0076b78).html.

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For a typical microstrip antenna placing the radiating elements and feed lines on one side of the substrate realises the advantages of planar fabrication. It can be shown that the currents in many parts of the feeder circuit have magnitudes comparable with those in the radiators and make a significant contribution to the total radiation. In this thesis the radiation from both the radiators and the feed lines will be examined. The radiation from microstrip was calculated from the current distribution. This method allows the calculation of the radiation from the nominal radiators and the feed ci

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7

Choudhary, Vipin. "Nondestructive testing and antenna measurements using UWB radar in industrial applications." Licentiate thesis, KTH, Teknisk informationsvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291129.

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Many industries are rapidly substituting the manual test operations and move towards automated operations using modern technologies.Modern technologies such as digital cameras, sonic sensors, infrared sensors, and radar and lidar systems are used for non-destructive testingoperations. Among all the different sensors, radar systems have theability to penetrate built structures (dielectric materials), which makes them flexible and suitable for a wide range of industrial and military applications in non-destructive sensing. Such examples are the detection of damages in goods manufacturing, monito

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8

Kujiraoka, Scott R. "USING COMMERCIAL-OFF-THE-SHELF (COTS) PRODUCTS IN THE DESIGN OF MISSILE FLIGHT-QUALIFIED HARDWARE." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/607685.

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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>During these times of acquisition reform in the federal government, various missile systems are being forced into using Commercial-off-the-Shelf (COTS) products in the design of their subsystems. However one problem that this presents is the lack of configuration management. There is a concern that the manufacturer will modify the product without informing the end user. This may have a severe effect on the performance of an already flight qualified subsystem. An e

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9

Augustin, E. P., D. S. Dunn, J. F. Posada, and A. Sullivan. "RADPAT: A NEW PORTABLE DIGITAL RADIATION PATTERN RECORDING SYSTEM." International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608401.

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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada<br>This paper describes a novel Radiating Antenna Digital Pattern Analysis Test system (RADPAT). The RADPAT system consists of a portable computer and a compact electronic module (EM) that interfaces to the antenna under test . The EM has standardized inputs and outputs that make it easy to adapt to any antenna or antenna system. In addition to functioning as a standard radiation pattern recorder, the RADPAT system can record conically scanning (CONSCAN), single channel mon

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10

Richard, Gaetan C., and Brian Donlin. "A NEW MOBILE TELEMETRY STATION FOR TESTING AIR-TO-GROUND WEAPONS." International Foundation for Telemetering, 1996. http://hdl.handle.net/10150/608379.

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International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California<br>This paper describes a new mobile self contained telemetry station designed for field testing of air-to-ground weapons. The telemetry station makes creative use of existing equipment and incorporates a unique dual axis tracking system to provide complete coverage of most missions.

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11

Geoghegan, Mark, and Louis Boucher. "Space-Time Coding Solution to the Two-Antenna Interference Problem." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577388.

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ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA<br>In order to provide reliable line-of-sight communications, test aircraft typically use two transmit antennas to create top and bottom hemispherical patterns that cover the full range of possible aircraft orientations. The two transmit signals are normally generated by a single transmitter with the power being split between the two antennas. Although this configuration is straightforward and

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12

Reighter, Greg. "TELEMETRY CONSIDERATIONS WITH OPERATIONAL STEALTH VEHICLES." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607357.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>Instrumenting the operational B-2 Strategic Bomber presents some unique problems. For example, the requirement to remain operational dictates that the aircraft must retain its stealth characteristics. This means traditional antennas cannot simply be attached to the airframe. A solution to this problem is an antenna designed with stealth, or Low Observable (LO), attributes. Stealth is not an absolute; it is relative. Therefore, antenna design

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Hodges, Amelia Lynn. "Investigation of antennas and energy harvesting methods for use with a UHF microtransceiver in a biosensor network." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/16218.

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Master of Science<br>Department of Electrical and Computer Engineering<br>William B. Kuhn<br>This work was a part of NASA EPSCoR Project NNX11AM05A: Biosensor Networks and Telecommunication Subsystems for Long Duration Missions, EVA Suits, and Robotic Precursor Scout Missions. The project’s main goal is the development of a wireless sensor network inside an astronaut’s spacesuit. Antennas are essential components in a wireless network. Since this antenna will be used inside the spacesuit it is important to consider both the physical size limitations and the desired antenna polarization. Af

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14

Kelkar, Anand, Norm Lamarra, and Thomas Vaughan. "Development of a Synthetic Beamforming Antenna - From Drawing Board to Reality." International Foundation for Telemetering, 2009. http://hdl.handle.net/10150/606144.

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ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada<br>Following-up on an ITC 2006 paper, "From RF to bits with Synthetic Beamforming", we follow the development and fielding of a Digital Beamforming (DBF) Antenna. This antenna, built for an airborne Telemetry application, supports 10 individual polarization-diverse beams and immediately converts RF to IF at the antenna element through a suite of LNBs. The IF is then digitized and all subsequent p

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15

Sullivan, Arthur. "GPS-Trak Low Cost Alternative to Auto-Tracking Using GPS and Multimode Single Axis Antenna Techniques." International Foundation for Telemetering, 1992. http://hdl.handle.net/10150/611963.

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International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California<br>The GPS Satellite System provides precise determination of time, space, and position of aerospace (airborne) vehicles during flight and flight test situations. The cost of "GPS" equipment has been decreasing dramatically -- a phenomenon similar to that which was experienced with "hand held" calculators 20 years or so ago. By the use of a multigain (and beam) antenna and GPS, a very low cost single axis system can be utilized for reception of telemetry

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Jensen, Shauna. "Design and Prototyping of an Antenna-Coupled Cryotron." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1788.

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Grid-scale integration of renewable energy sources and smart grid devices has created new demands in flexible power conversion. State-of-the-art semiconductor power switches present limitations in power handling capability, as well as forward and reverse breakdown voltages. Superconducting materials are a viable alternative due to their robustness against high ampacities, large electric fields and abrupt changes in power flow. This work pays focus to material testing and apparatus design for an antenna-coupled cryotron (ACC), which is a superconducting power switch.Design, fabrication and test

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Kohlgraf, Dana C. "Design and testing of a frequency selective surface (FSS) based wide-band multiple antenna system." Connect to this title online, 2005. http://hdl.handle.net/1811/323.

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Thesis (Honors)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formattted into pages: contains ix, 54 p.; also includes graphics. Includes bibliographical references (p. 54). Available online via Ohio State University's Knowledge Bank.

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Luongo, Stephanie A. "Design, modeling, and testing of microstrip parch antenna arrays for vertical takeoff & landing aircraft." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1472964.

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19

Caswell, Eric D. "Analysis of a Helix Antenna Using a Moment Method Approach With Curved Basis and Testing Functions." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/37001.

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Typically wire antenna structures are modeled by approximating curved structures with straight wire segments. The straight wire approximation yields accurate results, but often requires a large number of segments to adequately approximate the antenna geometry. The large number of straight wire segments or unknowns requires a large amount of memory and time to solve for the currents on the antenna. By using curved segments which exactly describe the contour of the antenna geometry the number of unknowns can be reduced, thus allowing for bigger problems to be solved accurately. This thesis focus

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Fogle, Faisal A. (Faisal Adam). "Liquid lens beam steering and environmental testing for the miniature optical steered antenna for inter-satellite communication." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127076.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, May, 2020<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references (pages 105-106).<br>We investigate the feasibility of using a series of deformable liquid lenses to achieve wide-angle beam steering for CubeSat laser communication (lasercom) crosslinks. Liquid lenses are lenses that can non-mechanically alter focal length based on an applied voltage or current. We evaluate two commercial liquid lens manufacturers, Corning Varioptic and Optotune. Corning Varioptic lenses

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21

Esswein, Lance C. "Genetic algorithm design and testing of a random element 3-D 2.4 GHZ phased array transmit antenna constructed of commercial RF microchips." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FEsswein.pdf.

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Thesis (M.S. in Physics)--Naval Postgraduate School, June 2003.<br>Thesis advisor(s): Michael Melich, David Jenn, Rodney Johnson. Includes bibliographical references (p. 113-115). Also available online.

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22

Khatib, Amer. "A Novel and an Efficient Design of an Inverted F-Antenna for Bluetooth Low Energy Communications." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40523.

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Constantly, antenna plays an important role in expanding the wireless communication systems in different technology applications for example, but not limited to, IoT communications and automotive radar systems. On the other hand, the Bluetooth-Low-Energy (BLE) benefits different sorts of applications, as it offers (i) a very low power consumption, (ii) a very fast data transfer, (iii) and an inexpensive/efficient solution as well. This research is a part of AES-Nordic AB projects, which intends to improve the connection between remote vibration sensors and the measurement device. The vibration

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Sterne, Kevin Tyler. "Testing the Re-designed SuperDARN HF Radar and Modeling of a Twin Terminated Folded Dipole Array." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/32239.

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The Super Dual Auroral Radar Network (SuperDARN) is an international collaboration of researchers interested in Earthâ s near-space plasma environment. This group uses high frequency (HF) radars and backscatter from magnetic field-aligned plasma irregularities to study space weather manifested in the Earthâ s magnetosphere and ionosphere. Space weather impacts many technological systems including Global Positioning System (GPS), spacecraft orbits, power distribution, surveillance radar, HF communications and transpolar aviation. This thesis explores, in detail, the techniques and challe

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Apalboym, Maxim, and Scott Kujiraoka. "Advances in the Development of Missile Telemetry Test Sets: Utilizing 3D Printing for Rapid Prototyping and Manufacturing." International Foundation for Telemetering, 2015. http://hdl.handle.net/10150/596449.

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ITC/USA 2015 Conference Proceedings / The Fifty-First Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2015 / Bally's Hotel & Convention Center, Las Vegas, NV<br>Functionally testing missiles in the All Up Round (AUR), a configuration that consists of a complete system packaged in its flight worthy state, requires the use of test sets along with constituent conformal equipment for interfacing. During developmental testing, telemetry (TM) sections are integrated within an AUR missile. These test sets monitor TM unit performance while maintaining form, fit,

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Svensson, Lucas, and Gustaf Ljungné. "Feasibility of an Electrically Tuneable EMC Susceptibility Antenna for 26-150 MHz." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-73163.

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Electromagnetic compatibility (EMC) is an essential part in today’s society and there are more products around us that emit electromagnetic waves than ever before. To make sure that all these products function properly under all circumstances EMC testing is needed. One test that is conducted is radiated immunity testing. A susceptibility antenna is needed to perform immunity testing. This thesis aims to show that a tuneable antenna could be used for immunity testing in the frequency band 26-150 MHz and in the future replace the current antenna, which is not tuneable, used at SAAB Support and S

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Ibraheam, Maysam [Verfasser], Matthias [Akademischer Betreuer] Hein, Reiner [Gutachter] Thomä, and Michael [Gutachter] Meurer. "Design and testing of compact dual-band dual-polarized robust satellite navigation antenna arrays / Maysam Ibraheam ; Gutachter: Reiner Thomä, Michael Meurer ; Betreuer: Matthias Hein." Ilmenau : TU Ilmenau, 2020. http://d-nb.info/1210861771/34.

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Chong, Aaron A. "Complementary GPR antennas and watertank testing /." St. Lucia, Qld, 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16096.pdf.

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28

Zamorovskii, Vlad. "Composite materials filled with ferromagnetic microwire inclusions demonstrating microwave response to temperature and tensile stress." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9488.

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Amorphous and polycrystalline microwires cast from ferromagnetic Fe-based or Co-based alloys in glass envelope demonstrate unique magneto-anisotropic and high frequency impedance properties that make them very attractive for sensor applications. Magnetic anisotropies of different types result from the inverse magnetostriction effect (positive or negative) at the interface between the glass shell and the metal core, in the presence of the residual stresses induced during the Taylor-Ulitovski casting method. Therefore, the glass shell is not just isolation, but also is one of most important fact

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Black, Donald Nelson Jr. "Test zone field compensation." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/15047.

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Gururajan, Srikanth. "Design of anechoic chamber instrumentation and data acquisition module for testing and analysis of the CTHA." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=782.

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Thesis (M.S.)--West Virginia University, 1999.<br>Title from document title page. Document formatted into pages; contains viii, 116 p. : ill. (some col.) Includes abstract. Includes bibliographical references (p. 68-69).

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Yilmaz, Tuba. "Characterization of tissue mimicking materials for testing of implantable and on body antennas." Master's thesis, Mississippi State : Mississippi State University, 2009. http://library.msstate.edu/etd/show.asp?etd=etd-05282009-120047.

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32

Haefner, Dennis, Andreas Kimpe, Ludwig Altenbuchner, and Peter Turner. "Flying Boresight Source for Improved Testing and Calibration of Tracking Antennas and Advanced Flight Path Simulations." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577445.

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ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA<br>The application of ground-based boresight sources for calibration and testing of tracking antennas usually entails various difficulties, mostly due to unwanted ground effects. To avoid this problem, DLR MORABA developed a small, lightweight, frequency-adjustable S-band boresight source, mounted on a small remote-controlled multirotor aircraft. Highly accurate GPS-supported, position and alt

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Mehmood, Rashid. "A Study of Reconfigurable Antennas as a Solution for Efficiency, Robustness, and Security of Wireless Systems." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5556.

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The reconfigurable aperture (RECAP) is a reconfigurable antenna consisting of a dense array of electronically controlled elements, which can be manipulated to support many antenna functions within a single architecture. RECAPs are explored herein as an enabling technology for future software defined and cognitive radio architectures, as well as compact wireless devices supporting many bands and services. First, the concept of a parasitic RECAP is developed and analyzed for various communication applications. This begins with the analysis of existing RECAP topologies (e.g. planar and parasitic)

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May, Peter T. "VHF radar studies of the troposphere /." Title page, contents and summary only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phm4666.pdf.

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Ben, Abdallah Rayen. "Statistical signal processing exploiting low-rank priors with applications to detection in Heterogeneous Environment." Thesis, Paris 10, 2019. http://www.theses.fr/2019PA100076.

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Dans un premier lieu, nous considérons le problème de l'estimation de sous-espace d'un signal d'intérêt à partir d'un jeu de données bruité. Pour ce faire, nous adoptons une approche Bayésienne afin d'obtenir un estimateur minimisant la distance moyenne entre la vraie matrice de projection et son estimée. Plus particulièrement, nous étendons les estimateurs au contexte Gaussien composé pour les sources où l'a priori sur la base sera une loi complexe generalized Bingham Langevin. Enfin, nous étudions numériquement les performances de l'estimateur proposé sur une application de type space time a

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Carré, Barnabé. "Développement applicatif sur l’intégrabilité de systèmes d’imageries et de contrôle d’épaisseur par le biais de radar FMCW dans le domaine des ondes Terahertz." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0335.

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Afin de stimuler l'intérêt des industriels pour les systèmes térahertz dans le domaine du contrôle non destructif, ce manuscrit présente diverses méthodes et techniques d'amélioration des performances d'imagerie et de mesure d'épaisseur des capteurs radar sub-THz FMCW (Frequency Modulated Continuous Wave). Les approches d'imagerie focalisée sont restreintes par la diffraction et impliquent un compromis entre résolution latérale et profondeur de champ .La technique d'imagerie SAR (Synthetic Aperture Radar) permet de surmonter ces limites. Dans ce cadre, une nouvelle approche algorithmique est p

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McEwan, Neil J., Raed A. Abd-Alhameed, and M. N. Z. Abidin. "A Modified Radiometric Method for Measuring Antenna Radiation Efficiency." 2009. http://hdl.handle.net/10454/2714.

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No<br>Radiation efficiency of antennas is shown to be measurable by a modified radiometric technique where the antenna's physical temperature is varied, rather than the noise temperature of its surroundings. The method is accurate, flexible and much more convenient for routine use. A means of avoiding errors caused by temperature-dependent antenna impedance is described. The accuracy of the method is verified by measuring the radiation efficiency of a horn antenna with a 3 dB attenuator to simulate a 50% efficient antenna, and by using microstrip patch antennas, whose measured efficiencies com

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Chu, Yu-chun, and 朱祐君. "Development of Antenna Matching Testing System and Design of Circularly Polarized Antenna." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/b65ah2.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>99<br>In this thesis, a circularly polarized antenna, which is applicable to radio frequency identification (RFID), is proposed. The environment of the RFID application is complicated. In general, readers and tags are not set in fixed locations. Thus a circularly polarized reader antenna can be used to avoid tag orientation issues, and hence increase the RFID read rate. The design is integrated with a phased array system to provide a scanning beam that cover a broader area. In the second part, we attempted to improve the accuracy of the antenna matching measurement s

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Ramakrishna, Dommati. "Design, testing and assembly of rectangular patch antenna." Thesis, 2007. http://ethesis.nitrkl.ac.in/4389/1/Design_%2C_testing_and_assembly_of_rectangular_patch_antenna.pdf.

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One of humankind’s greatest natural resources is the electromagnetic spectrum and the antenna has been instrumental in harnessing this resource. The aim of the thesis is to Design and fabricate a coaxial fed rectangular Microstrip Antenna and study the effect of antenna dimensions Length (L), Width (W) and substrate parameters relative Dielectric constant (rε), substrate thickness on Radiation parameters of Band width and Beam width. A Microstrip antenna consists of conducting patch on a ground plane separated by dielectric substrate. Low dielectric constant substrates are generally preferred

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Su, Yu-ying, and 蘇昱瑩. "Development of Antenna Matching Testing System and Planar Scanning Farfield Antenna Pattern Measurement Range." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/88942835631496923016.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>100<br>In this thesis, we proposed two topics related to the antenna measurement systems. The first part focuses on performance improvement of an antenna matching testing system developed in previous work. The system can evaluate impedance matching conditions of one port devices. In the improved system, a high-precision data acquisition and control card is used. LabView programs are also developed to realizer system automation. Measurement speed, stability and precision are enhanced. The directional coupler, which is more compact and economical, is used to replace th

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Shen, Ding-Kang, and 沈鼎康. "Antenna Selection for Testing the Computer-Telephone-Intergration Near-Field Interfrence." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/fq972n.

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碩士<br>大葉大學<br>電機工程學系<br>103<br>When smart phones closely with other radio subsystem; for example, using a mobile phone as a WiFi hotspot so you can connect internet by tablet or laptop. This will likely produce Computer-Telephone-Intergration Near-Field Interference, thus establishing an evaluation near-field electromagnetic interference is necessary,Testing the Computer-Telephone-Intergration Near-Field Interfrence. However, during this test, select the test antenna must be careful, because it is a near-field electromagnetic interference testing, theelectronic system under test will adversely

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Huang, Jun-Bo, and 黃浚柏. "3D Spatial Channel Emulation with Antenna Selection in MIMO OTA Testing Systems." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/78412134325424689103.

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碩士<br>國立交通大學<br>電信工程研究所<br>103<br>In this thesis, we formulate a channel emulation problem with practical constraints in a 3D MIMO OTA testing system and solve for the optimal power weights for each probe antenna. When using conventional algorithms to calculate the optimal power weights, the reconstruction errors may be large in some directions. We propose a min-max algorithm to suppress the maximum error. Moreover, to reduce the setup cost, we propose a probe antenna selection algorithm to reduce the number of active probe antennas while keeping the accuracy of the testing. In addition, we us

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Al-Dahleh, Reena. "The design and testing of a frequency-tunable mechanically actuated microstrip patch antenna." 2003. http://hdl.handle.net/1993/19820.

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Chen, Peng-Yu, and 陳鵬宇. "Antenna Design and System Testing for Wireless Navigation Used in Minimally Invasive Surgery." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/7k5k4u.

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碩士<br>國立中正大學<br>電機工程研究所<br>103<br>In this thesis, a miniaturized antenna design for minimally invasive surgical positioning system is proposed. Comparing to the traditional surgery, the benefits of minimally invasive surgery include increased safety, decreased scarring and faster recovery. However, the limited field of view also brings difficulty, which motivates this work. Four antennas, including loop antenna and slot antenna, have been designed for surgical instruments with very restricted size limit. In order to carry out the in-body antenna measurement, the electrical characteristic of h

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Tsai, Chih-Yu, and 蔡智宇. "MIMO Antennas for the Multi-Gbps 5G Smartphone and MIMO Channel Capacity Testing." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/mv5y8t.

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博士<br>國立中山大學<br>電機工程學系研究所<br>106<br>The High-Dimensional (HD) MIMO operation with at least eight MIMO streams is a very promising technology for applications in the fifth-generation (5G) mobile communication terminals. HD MIMO can provide a much higher spectral efficiency, thereby increasing the data throughput in practical communications. However, it has been a great challenge for antenna designers to dispose as many as MIMO antennas with low envelope correlation coefficients (ECCs) in the very limited space of the smartphone. In this thesis, promising eight and twelve MIMO antennas for the 5

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May, Peter T. "VHF radar studies of the troposphere / by Peter T. May." Thesis, 1986. http://hdl.handle.net/2440/20636.

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Islam, Md Ashraful. "Advanced microwave embedded sensors for infrastructure health monitoring." Thesis, 2017. http://hdl.handle.net/1959.7/uws:41356.

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Microwave sensor systems have been widely investigated for many applications due to their ability to provide non-destructive, noncontact, one-sided and wireless testing. Among these applications infrastructure health monitoring of bridges, building, and dams using microwave sensors, which are mounted on or embedded in composite structures of infrastructure has been attracting an increasing interest. One of the current needs of infrastructure health monitoring includes the detection and monitoring of disbonding and gaps in concrete-based structures, which are also required for simultaneous char

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Grant, Stephen Ian. "Medium frequency radar studies of meteors." 2003. http://thesis.library.adelaide.edu.au/public/adt-SUA20040224.152811.

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"July 2003." Includes bibliographical references (leaves 459-484) Electronic publication; full text available in PDF format; abstract in HTML format. Details the application of a medium frequency Doppler radar to observations of meteorites entering the Earth's atmosphere. Techniques were developed that verified system performance was to specification Electronic reproduction.[Australia] :Australian Digital Theses Program,2001. xx, 485 leaves : ill. ; 30 cm.

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