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Showing 1 to 13 of 13 for “"Low profile antennas"”.
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Bandwidth enhancement techniques for low-profile antennas: Theory and experiment
… techniques for bandwidth enhancement for low-profile antennas. The first method involves the use of coupled resonators. In particular, two cavity-backed slot antennas are coupled through an aperture in a common wall. One cavity-backed slot antenna, of the coupled antenna system, is driven. …
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Analysis and design of compact low profile antennas for fixed volume applications
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-01-10T20:26:15Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 VanNiekerk_Carlo.pdf: 26003010 bytes, checksum: 915d921e86907a553b17985392559c1a (MD5)
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A Nonlinear Technique for Bandwidth Improvement in Narrowband Antennas
Electrically small, low profile antennas have become the new frontier in wireless communication research. With the pressure to miniaturize wireless communication devices, engineers are turning to small low profile antennas as a way to reduce their antennas and hence their devices. Ideally, one …
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Investigation of Low Profile Antenna Designs for Use in Hand-Held Radios
Antennas in hand-held radios must be compact and unobtrusive. Electrically small and low-profile antennas experience high input reactance, low input resistance, and low radiation efficiency.Further degradation of radiation efficiency occurs in hand-held radios due to size-reduced ground planes, …
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Ultra-wideband miniaturized microstrip patch antennas for wireless communications: design guidelines and modeling
… the meantime, creating a demand on efficient and low profile antennas which can be integrated on a printed circuit board. The main objective of this thesis is to study, design, analyze and implement UWB low profile microstrip patch antenna that satisfy UWB technology requirements. Some methods to …
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A Numerical Parametric Study on the Performance of a Low Profile dipole Planar Inverted Cone Antenna Placed over an Electromagnetic Bandgap Structure
… the conductive ground plane found in most low profile antennas. In this thesis, the effect of EBG materials on a low profile dipole planar inverted cone antenna (LPdiPICA) is investigated. A simple and effective design procedure for deriving the parameters for the Sievenepiper mushroom-like …
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Wideband Compact Antennas for Wireless Communication Applications
… In the past few years, new designs of low-profile antennas for handheld wireless devices have been developed. The major drawback of many low-profile antenna designs is their narrow impedance bandwidth. Furthermore, the market trend of personal wireless devices is moving toward a …
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Balanced antennas for mobile handset applications. Simulation and Measurement of Balanced Antennas for Mobile Handsets, investigating Specific Absorption Rate when operated near the human body, and a Coplanar Waveguide alternative to the Balanced Feed.
… of this research are to investigate and design low profile antennas for mobile handsets applications using the balanced concept. These antennas are considered to cover a wide range of wireless standards such as: DCS (1710¿1880 MHz), PCS (1850¿1990 MHz), UMTS (1920¿2170 MHz), WLAN (2400¿2500 MHz …
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Antenna design using optimization techniques over various computaional electromagnetics. Antenna design structures using genetic algorithm, Particle Swarm and Firefly algorithms optimization methods applied on several electromagnetics numerical solutions and applications including antenna measurements and comparisons
… of this work are to model, study and design low profile antennas for wireless and mobile communications applications using optimization process over a computational electromagnetics numerical solution. The numerical solution method could be performed over one or hybrid methods subjective to …
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Design and Implementation of Reconfigurable and MIMO Antennas for Future Heterogeneous Wireless Systems
… equipment poses a key design challenge, as most antennas often suffer from bandwidth limitations and restricted frequency rarge. Onekey approach to overcome this problem without significantly affecting the antenna size is to apply antenna tuneability and reconfigurability. This is achieved by …
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Antenna design using optimization techniques over various computaional electromagnetics. Antenna design structures using genetic algorithm, Particle Swarm and Firefly algorithms optimization methods applied on several electromagnetics numerical solutions and applications including antenna measurements and comparisons
… of this work are to model, study and design low profile antennas for wireless and mobile communications applications using optimization process over a computational electromagnetics numerical solution. The numerical solution method could be performed over one or hybrid methods subjective to …
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Design and comparative performance evaluation of novel mobile handset antennas and their radiative effects on users.
… (3G) systems require long operation time, low weight and cost for terminals, as well as improved link quality.<br/><br/>For this reason a good efficiency and low profile antennas with low absorption losses by the user are desirable. The Planar Inverted-F Antenna (PIFA) is shown to result …
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The Effects of Atomic Oxygen on Patch Antenna Performance and Lifetime
… place for satellites to survive in. For Low Earth Orbiting (LEO) satellites, atomic oxygen (AO) is a constant corrosive effect that degrades the outer surface of satellites over long durations. Atomic oxygen exists in the atmosphere between 180 and 675 km and has a relatively high energy …