Browsing by Keywords "Directional patterns (antenna)"
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Analysis of cylindrically conformal antennas using closedform Green's function representations
(IEEE, 201504)Probefed microstrip patch antennas and slotted sectoral waveguide array antennas embedded in cylindrically stratified media are analyzed with a hybrid Method of Moments/Green's function technique, where closedform Green's ... 
Analysis of finite arrays of axially directed printed dipoles on electrically large circular cylinders
(IEEE, 2004)Various arrays consisting of finite number of printed dipoles on electrically large dielectric coated circular cylinders are investigated using a hybrid method of moments/Green's function technique in the spatial domain. ... 
Analysis of radome covered circular reflectors by complex sourcedual series approach
(IEEE, 1994)Radiation from a two dimensional reflector antenna covered by a cylindrical radome is analyzed by the complex dual series approach. It is only performed for the electrically polarized incident field. The approach is based ... 
Applications of hybrid discrete Fourier transform moment method to the fast analysis of large rectangular dipole arrays printed on a thin grounded dielectric substrate
(Wiley, 2002)Recently a discrete Fourier transformmethod of moments (DFTMoM) scheme was developed for fast analysis of electrically large rectangular planar dipole arrays, which has been shown to be very efficient in terms of number ... 
Calculation of radomeenclosed aperture antenna in 3D
(IEEE, 201009)The exact mathematical model of an aperture antenna and the image theory are used to develop exact and PO integral representations of the fields radiated by radomeenclosed aperture antenna. The desired problem is reduced ... 
Decoupling of multifrequency dipole antenna arrays for microwave imaging applications
(Hindawi Publishing Corporation, 2010)The mutual coupling between elements of a multifrequency dipole antenna array is experimentally investigated by S parameter measurements and planar nearfield scanning of the radiated field. A multifrequency array with ... 
The design of a wideband and widebeam piston transducer in a finite closed circular baffle
(20080607)The design of a high power piezoelectric underwater transducer operating at frequency range 40 kHz80 kHz with acoustic power capability in excess of 250W is described. The transducer consists of two backtoback elements. ... 
Extension of forward backward method with DFT based acceleration algorithm for the efficient analysis of large periodic arrays with arbitrary boundaries
(IEEE, 2003)An extension of ForwardBackward (FB) with Discrete Fourier Transform (DFT) based acceleration approach is presented. This is given to provide a relatively efficient analysis of EM radiation/scattering from an electrically ... 
Highly directional resonant antennas built around photonic crystals
(IEEE, 1999)We report a photonic crystalbased resonant antenna with a very high directivity and gain. The layerbylayer dielectric photonic crystal we used in our experiments was designed to have a three dimensional band gap with a ... 
Logperiodic antenna design using electromagnetic simulations
(IEEE, 200306)It is essential to complement theoretical antenna design recipes with the numerical results obtained from electromagnetic simulations. As such, the benefit of such a hybrid procedure is demonstrated by using the design of ... 
Millimeterwave scale metamaterials
(IEEE, 200911)We review two metamaterial configurations, which are operating at the millimeterwave scale, in terms of design, fabrication, and characterization. We observed both numerically and experimentally at around 100 GHz a narrow ... 
Phaseonly beam synthesis by iterative semidefinite relaxations with rank refinement
(IEEE, 2013)In phased array antennas, by varying the complex element weights beam patterns with desired shapes can be synthesized and/or steered to desired directions. These complex weights can be implemented by using amplitude ... 
Physical optics modeling of 2D dielectric lenses
(Optical Society of America, 20090127)We propose an advanced physical optics formulation for the accurate modeling of dielectric lenses used in quasioptical systems of millimeter, submillimeter, and infrared wave applications. For comparison, we obtain an ... 
Radiation characteristics of a 2D parabolic reflector antenna excited by the Hpolarized complex source
(IEEE, 200209)The aim of this paper is to obtain accurate reference data for relatively large and realistic reflector antenna systems. We concentrate on a parabolic reflector antenna in the Hpolarization case. The directive primary ... 
Smart radome improves reflector antenna directivity
(IEEE, 1997)A numerical optimization procedure is applied to two dimensional model of cylindrical reflector antenna arbitrarily located inside a circular cylindrical dielectric radome. If the radome thickness has been optimized, then ... 
Three dimensional microfabricated broadband patch and multifunction reconfigurable antennae for 60 GHz applications
(IEEE, 201504)In this paper we present two antenna designs capable of covering the IEEE 802.11ad (WiGig) frequency band (5766 GHz and 5966 GHz respectively). The work below reports the design, microfabrication and characterization of ...