Search results for "Patch antenna"

showing 6 items of 6 documents

Miniaturization of rectangular microstrip patches using genetic algorithms

2002

This paper presents a new procedure for the miniaturization of rectangular microstrip patches based on genetic algorithms. The shape of a typical rectangular patch is modified in order to reduce its resonance frequency keeping the physical volume of the antenna constant. As an example, the resonance frequency of a square microstrip patch is reduced from 3 to 1.8 GHz. The patch is divided in 9/spl times/9 square cells. The genetic algorithm optimization procedure is subsequently used to remove some of the metallic cells. To validate the procedure an antenna prototype has been fabricated and tested. Good agreement is obtained between theoretical and experimental results.

Patch antennaEngineeringbusiness.industryAcousticsResonanceSquare (algebra)MicrostripMicrostrip antennaElectronic engineeringMiniaturizationElectrical and Electronic EngineeringAntenna (radio)businessConstant (mathematics)IEEE Antennas and Wireless Propagation Letters
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A Telemetry, Tracking, and Command Antennas System for Small-Satellite Applications

2019

Circularly polarized (CP) antennas are used in space applications for telemetry tracking and command (TT&amp

small satellitesComputer Networks and CommunicationsFrequency bandTT&amplcsh:TK7800-836002 engineering and technologyTracking (particle physics)circular patchOpticsCircular patch; Circular polarization; Small satellites; TT&CComputer Science::Systems and ControlCTelemetryTelecommunications link0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringCircular polarizationComputer Science::Information TheoryPatch antennaPhysicsbusiness.industryAxial ratio020208 electrical & electronic engineeringlcsh:ElectronicsAstrophysics::Instrumentation and Methods for Astrophysics020206 networking & telecommunicationsHardware and ArchitectureControl and Systems EngineeringPhysics::Space PhysicsSignal Processingcircular polarizationAntenna (radio)businessSmall satelliteElectronics
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A circularly polarized wideband high gain patch antenna for wireless power transfer

2018

This article deals with a microstrip patch antenna working at 868 MHz, suitable for the radio frequency wireless power transfer and energy harvesting applications. The proposed monolithic antenna is compact, lightweight and it is printed on a thick substrate in order to maximize the total gain in the broadside direction. The antenna radiates at 868 MHz with a fractional impedance bandwidth of 5% and it shows a gain of 4.14 dB.

High-gain antennaAtomic and Molecular Physics and OpticComputer science02 engineering and technologyCondensed Matter PhysicSettore ING-INF/01 - Elettronicawireless energy transferAtomic and Molecular PhysicsElectronic0202 electrical engineering electronic engineering information engineeringcapacitive compensation; enhanced gain antenna; radiofrequency energy harvesting; wireless energy transfer; Electronic Optical and Magnetic Materials; Atomic and Molecular Physics and Optics; Condensed Matter Physics; Electrical and Electronic EngineeringOptical and Magnetic MaterialsWireless power transferWidebandElectrical and Electronic EngineeringPatch antennabusiness.industryElectronic Optical and Magnetic Material020208 electrical & electronic engineeringElectrical engineering020206 networking & telecommunicationsradiofrequency energy harvestingCondensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialscapacitive compensationenhanced gain antennaand Opticsbusiness
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Design of a Compact Dual Circular-Polarized Antenna for L-Band Satellite Applications

2020

In this paper, we propose the design of a dual circular-polarized antenna for L-band applications (1.1-1.6 GHz). The designed antenna has been developed by considering crossed-dipoles on top of which a circular patch has been placed to properly act on the mutual coupling between the dipoles. The dual circular polarization is achieved by feeding dipoles in quadrature. Moreover, to increase the antenna gain and polarization purity at high elevation angles, a fence of passive monopoles has been added. The proposed antenna can profitably used as primary feed of a low-frequency parabolic reflector.

PhysicsL bandbusiness.industryParabolic reflectorBandwidth (signal processing)Astrophysics::Instrumentation and Methods for Astrophysics020206 networking & telecommunicationsCircular polarization crossed dipoles patch antennas small satellites02 engineering and technologyPolarization (waves)Settore ING-INF/01 - Elettronicalaw.inventionSettore ING-IND/31 - ElettrotecnicaDipoleOpticslaw0202 electrical engineering electronic engineering information engineeringDipole antennaElectrical and Electronic EngineeringAntenna gainbusinessCircular polarizationIEEE Antennas and Wireless Propagation Letters
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Minimization of a rectangular patch using genetic algorithms

2002

In recent years, the miniaturization of antennas have become more and more important, especially in connection with subscriber transceivers for cellular systems. Due to the multiple scattering environments and the almost indefinable operating scenario, the crosspolarization characteristics of the antenna are less important, however its physical size is critical. The attempts to reduce the physical size of the antenna made in the past, used classical methods, such as embedding the antenna in a dielectric medium of a high permittivity, adding a resistive element in series with the antenna, etc., but little effort was invested in simply generating other geometries, which by their intrinsic pro…

Patch antennaEngineeringReconfigurable antennaDirectional antennabusiness.industryConformal antennaAntenna measurementAstrophysics::Instrumentation and Methods for AstrophysicsElectrical engineeringEvolved antennaMicrostripAntenna efficiencylaw.inventionMicrostrip antennaElectrical lengthlawElectronic engineeringAntenna (radio)businessOmnidirectional antennaComputer Science::Information TheoryIEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)
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Photonic controlled metasurface for intelligent antenna beam steering applications including 6G mobile communication systems

2023

This paper presents a novel metasurface antenna whose radiation characteristics can be remotely controlled by optical means using PIN photodiodes. The proposed reconfigurable antenna is implemented using a single radiating element to minimize the size and complexity. The antenna is shown to exhibit a large impedance bandwidth and is capable of radiating energy in a specified direction. The proposed antenna consists of a standard rectangular patch on which is embedded an H-tree shaped fractal slot of order 3. The fractal slot is used to effectively reduce the physical size of the patch by 75 % and to enhance its impedance bandwidth. A metasurface layer is strategically placed above the patch…

Photonic systemsReconfigurable devicesBeam steeringMetasurfaceElectrical and Electronic EngineeringPatch antennaFractal geometries
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