Antennas and Arrays
Circularly Polarized Arrays of Cavity Backed Slot Antennas for X-Band Satellite Communications
... square-shaped arrays of CBS antennas are designed to produce circular polarization for X-band satellite ...both arrays over some operating frequency bands have been ...proposed arrays can ...
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Enhancing the Directivity of Phased Array Antennas Using Lens-Arrays
... Abstract—Small phased-array antennas can be combined with dielectric lenses or planar lens-arrays to form directive beam-steering system. The use of the lens increases the size of the radiating aperture and ...
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Analysis of Arrays of Printed Strip Dipole Antennas and Broadband Antennas of Six Series Fed Strip Dipoles
... Dipole antennas are suitable in wireless multi-band technology, because they are simple to design and have excellent radiation ...dipoles antennas are very hard to do because of the presence of dielectric ...
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A Comparative Study of MoM/GA and MoM/PSO in Synthesizing Linear Antennas Arrays
... the element spacing, and k=2π⁄λ is the free space wave number. The moment method and the genetic algorithm (MoM/GA) [10] are utilized to reconstruct new element locations and excitations that fulfill the required ...
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An Investigation on Vector Antennas
... of a MIMO system six fold compared to a single antenna system through the use of three orthogonal dipoles and three orthogonal loops, all co-located. This result was significant as it suggested the possibility of ...
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Investigation of Vector Antennas and their Applications
... Linear arrays of tri-polarized antenna elements provide a three-fold increase in the degrees of freedom as compared to analogous arrays of uni-polarized ...small antennas, finite length dipole and ...
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Abstract- Array antennas are popular compared to discrete antennas as it is possible to control the radiation
... Antenna arrays enable to provide the features desired in the pattern form with the arranging of one of the array elements amplitude and phase stimulation coefficient and the appropriate design of the array ...
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Air Shower Detection by Arrays of Radio Antennas
... Antenna arrays are beginning to make important contributions to high energy astroparticle physics supported by recent progress in the radio technique for air ...radio arrays for atmospheric particle ...
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Introduction to Ultra-Wideband Antennas
... UWB antennas fall within these general categories. Directional antennas include horn and reflector ...These antennas can also be implemented in relatively compact planar ...element antennas ...
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Assessment of MVDR Adaptive Beamforming algorithm in uniform linear arrays, uniform rectangular arrays and uniform circular arrays configurations
... Interference from other users can be either unintentional or intentional (Halim, 2001). Unintentional interference is caused by nonidealities in the transmitter or using the same or adjacent channel. Intentional ...
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Comparing Radiation Characteristics of Fractal Arrays with Random and Periodic Arrays
... Antenna arrays provide high gain, diversity, beam steering and also Maximize SNR and cancel interference patterns when compared with single ...of antennas can be of antenna elements placed on a plane in ...
5
Cisco Aironet Antennas and Accessories
... omnidirectional antennas mounted just below the ceiling girders or just below the drop ceiling typically provide the best coverage (this will vary with stocking, type of material, and building ...
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Implantable antennas for biomedical applications
... Design of implantable antennas requires the comprehensive knowledge of antennas surrounded by lossy biological tissues. Theoretical aspects related to the presence of lossy matter and their consequences on ...
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Slits in parabolic reflector antennas
... Similarly the scattered field from a strip under Dirichlet Boundary Conditions is the negative of the diffracted field through the slit with Neumann Boundary Conditions on the conducting[r] ...
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Null field treatment of antennas
... 1962, "The numerical solution of an integral equation of the first kind for the current density in an antenna body of revolution",.. [Translated from Zh.[r] ...
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Filtering Antennas: Synthesis and Design
... synthesize and design the new printed Bandpass Filtering Antenna. For the purpose of miniaturization and enhancing the overall performance of the circuit, a multifunction module is designed. It performs filtering and ...
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UWB antennas for wireless communications
... In this Chapter, a novel UWB planar monopole antenna with quintuple- band-notched characteristics has been proposed. The quintuple-band-notched functions have achieved by embedding five MSRs into the radiator, feedline, ...
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RFI Prevention for Colocated Antennas
... g-meter antennas are positioned at the north end of the complexes in the northern hemisphere, and at the south end of the complex in the southern hemisphere, the chances for cross pointing would be greatly ...
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Implantable antennas for biomedical applications
... Chapter 6 estimates and quantifies the loss of a communication path between a pacemaker and a glucose monitoring device. The benefit of this type of communication is indicated in [28]. Both of the glucose monitoring and ...
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Nonlinear characterisation of reconfigurable antennas
... This method consists of a wide range of technologies which includes micro-machined Vee antenna [40]. However, material-based techniques using electroactive and shape-memory materials is the emerging technology which ...
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