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# IEEE Transactions on Antennas and Propagation

## Issue 4  Part 1 • April 2014

This issue contains several parts.Go to:  Part 2

## Filter Results

Displaying Results 1 - 25 of 32

Publication Year: 2014, Page(s):C1 - 1545
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• ### IEEE Transactions on Antennas and Propagation publication information

Publication Year: 2014, Page(s): C2
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• ### Guest Editorial for the Special Issue on Innovative Phased Array Antennas Based on Non-Regular Lattices and Overlapped Subarrays

Publication Year: 2014, Page(s):1546 - 1548
Cited by:  Papers (1)
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• ### Unequally Spaced Arrays Based on the Poisson Sum Formula

Publication Year: 2014, Page(s):1549 - 1554
Cited by:  Papers (8)
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It has been recognized that unequally spaced arrays can offer some advantages over equally spaced arrays, mainly in the following areas: 1) thinned array by reducing the number of elements to achieve the high resolution without producing grating lobes; 2) broadbanding or wide scanning without grating lobes; 3) reducing sidelobes for the array of uniform amplitude; and 4) unequally spaced arrays on... View full abstract»

• ### Synthesis of Thinned Planar Circular and Square Arrays Using Density Tapering

Publication Year: 2014, Page(s):1555 - 1563
Cited by:  Papers (13)
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Two new hybrid density taper methods for designing thinned planar arrays are presented. Both methods make use of a model taper to allocate for a number of rings across the array aperture the amount of turned ON elements per ring. One method applies a modified version of the iterative Fourier transform (IFT) method to find the optimum turned ON element distribution for each ring to get a prescribed... View full abstract»

• ### Synthesis of Large Thinned Planar Arrays Using a Modified Iterative Fourier Technique

Publication Year: 2014, Page(s):1564 - 1571
Cited by:  Papers (5)
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A modified iterative Fourier technique (MIFT) is proposed for the synthesis of large thinned planar arrays generating a pattern with lower sidelobe level (SLL). This technique is based on the iterative Fourier technique (IFT), and a variable filling factor is introduced to avoid the local minima in the optimization. Numerical results for several circular thinned planar arrays demonstrate that when... View full abstract»

• ### Calculation of Far-Field Radiation Pattern Using Nonuniformly Spaced Antennas by a Least Square Method

Publication Year: 2014, Page(s):1572 - 1578
Cited by:  Papers (1)
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The far field pattern from a nonuniformly spaced antenna array is computed using a least squares method. The method originally developed for spectral estimation for a nonuniformly spaced finite data set is applied for the analysis of the far field pattern from unevenly spaced antennas, as the far field pattern is due to the spectrum of the location of the antenna elements. The advantage of using a... View full abstract»

• ### Efficient Analysis of Large Aperiodic Antenna Arrays Using the Domain Green's Function Method

Publication Year: 2014, Page(s):1579 - 1588
Cited by:  Papers (14)
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An efficient method-of-moments (MoM) based domain decomposition technique, viz., the domain Green's function method (DGFM), is presented for analyzing large antenna arrays. The DGFM is a perturbation technique where mutual coupling between array elements is accounted for during the formulation of an active impedance matrix for each domain/array element. The active current distribution on the entir... View full abstract»

• ### Synthesis of Taylor-Like Patterns With Uniformly Excited Multi-Ring Planar Antennas

Publication Year: 2014, Page(s):1589 - 1595
Cited by:  Papers (4)
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In this paper, we describe the synthesis of circular-Taylor-like patterns for antennas composed of concentric rings of uniformly excited elements. Optimization of the ring radii achieves close approximation to the envelope of the desired pattern within a given cone about the main beam. An alternative approach, using annular subarrays, speeds computations by limiting the number of between-ring spac... View full abstract»

• ### A Global-Local Synthesis Approach for Large Non-Regular Arrays

Publication Year: 2014, Page(s):1596 - 1606
Cited by:  Papers (8)
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A method is proposed for the synthesis of large planar non-regular arrays assuming constant magnitude for the excitation of the elements. The approach, which combines global and local optimization, is based on distinguishing aperture-type and non-coherent parts of the array factor. The following constraints are considered: minimal separation of the antennas, maximum size of the array and fixed mai... View full abstract»

• ### Isophoric Sparse Arrays Ensuring Global Coverage in Satellite Communications

Publication Year: 2014, Page(s):1607 - 1618
Cited by:  Papers (9)
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Non-periodic, sparse Direct Radiating Arrays employing equi-amplitude (isophoric) radiators represent an appealing solution to meet the requirements of next satellite services. In this work we address the synthesis of isophoric sparse arrays capable of radiating highly steerable pencil beams, in order to meet the requirement of full Earth coverage from GEO orbits. To this aim, we first of all perf... View full abstract»

• ### Array Antennas With Jointly Optimized Elements Positions and Dimensions Part I: Linear Arrays

Publication Year: 2014, Page(s):1619 - 1626
Cited by:  Papers (2)
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The paper describes a deterministic algorithm based on simple analytical expressions for designing linear sparse array antennas, composed of not overlapping linear sub-apertures with pre-assigned power levels, where the positions and the dimensions of the radiating elements are jointly optimized and exploited. The obtained arrays permit maximizing the aperture filling and, as a consequence, the ap... View full abstract»

• ### Array Antennas With Jointly Optimized Elements Positions and Dimensions Part II: Planar Circular Arrays

Publication Year: 2014, Page(s):1627 - 1639
Cited by:  Papers (19)
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The paper describes a deterministic algorithm based on simple analytical equations for designing planar circular sparse array antennas where the positions and the dimensions of the radiating elements are jointly exploited and optimized. The proposed solution permits addressing one of the main limitations associated to sparse arrays, i.e., their poor aperture efficiency especially when patterns wit... View full abstract»

• ### An Efficient and Versatile Technique for the Synthesis of 3D Copolar and Crosspolar Patterns of Phase-Only Reconfigurable Conformal Arrays With DRR and Near-Field Control

Publication Year: 2014, Page(s):1640 - 1651
Cited by:  Papers (3)
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An accurate and flexible iterative algorithm of power synthesis for reconfigurable arrays is proposed. The algorithm is based on an alternating projection approach, and is suitable for arrays of arbitrary geometry, thus including conformal and sparse arrays. It allows to generate a number of copolar and crosspolar radiation patterns satisfying assigned requirements, switching each pattern into any... View full abstract»

• ### Sparse 2-D Array Placement for Arbitrary Pattern Mask and With Excitation Constraints: A Simple Deterministic Approach

Publication Year: 2014, Page(s):1652 - 1662
Cited by:  Papers (5)
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We present a novel algorithm for the synthesis of planar (2-D) arrays subject to arbitrary pattern masks and excitation constraints (e.g., dynamic range). The algorithm is simple and deterministic, and considers the radiating element pattern. The procedure starts with a conventional constrained fixed-grid synthesis on a regular lattice, yielding a goal radiated field. Next, element locations are s... View full abstract»

• ### Design of Ultra-Wideband, Aperiodic Antenna Arrays With the CMA Evolutionary Strategy

Publication Year: 2014, Page(s):1663 - 1672
Cited by:  Papers (2)
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Recently, the covariance matrix adaption evolutionary strategy (CMA-ES) has received attention for outperforming conventional global optimization techniques such as the genetic algorithm (GA) or particle swarm optimization (PSO), often used in electromagnetic designs. Here, CMA-ES is first applied to the design of ultra-wideband aperiodic arrays using realistic spiral radiating elements. To improv... View full abstract»

• ### Geometry Design Optimization of Large-Scale Broadband Antenna Array Systems

Publication Year: 2014, Page(s):1673 - 1680
Cited by:  Papers (2)
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The next generation radio telescopes such as the Square Kilometer Array (SKA) are expected to contain thousands of antenna array elements operating over a broad frequency range where the signals from each antenna element are combined and processed simultaneously providing high sensitivity with multiple beams providing a wide field of view. One crucial design aspect influencing both the performance... View full abstract»

• ### Sparsening Conformal Arrays Through a Versatile $BCS$-Based Method

Publication Year: 2014, Page(s):1681 - 1689
Cited by:  Papers (28)
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Sparsening conformal arrangements is carried out through a versatile Multi-Task Bayesian Compressive Sensing (MT-BCS) strategy. The problem, formulated in a probabilistic fashion as a pattern-matching synthesis, is that of determining the sparsest excitation set (locations and weights) fitting a reference pattern subject to user-defined geometrical constraints. Results from a set of representative... View full abstract»

• ### The Generalized Direct Optimization Technique for Printed Reflectarrays

Publication Year: 2014, Page(s):1690 - 1700
Cited by:  Papers (10)
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A generalized direct optimization technique (GDOT) for the design of printed reflectarrays using arbitrarily shaped elements with irregular orientation and position is presented. The GDOT is based on the spectral domain method of moments (SDMoM) assuming local periodicity (LP) and a minimax optimization algorithm. The accuracy of the LP-SDMoM for the design of reflectarrays with irregularly positi... View full abstract»

• ### Multi-Coset Sparse Imaging Arrays

Publication Year: 2014, Page(s):1701 - 1715
Cited by:  Papers (1)
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We develop an efficient structured sparse antenna array architecture for coherent imaging of sparse but otherwise unknown scenes. In this architecture, the array elements are configured in a periodic nonuniform pattern that can be viewed as the superposition of multiple sparse uniform subarrays. For such structure, we develop an efficient pattern design procedure using co-array analysis, and we de... View full abstract»

• ### Sparse Array Optimization Using Simulated Annealing and Compressed Sensing for Near-Field Millimeter Wave Imaging

Publication Year: 2014, Page(s):1716 - 1722
Cited by:  Papers (13)
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The optimization and use of a sparse array configuration for an active three dimensional (3D) millimeter wave imaging system for personnel security screening is presented in this work. The combination of the optimization procedure with the use of Compressed Sensing techniques allows drastic reduction in the number of sensors, thereby simplifying the system design and fabrication and reducing its c... View full abstract»

• ### Sparse Array Antenna for Ku-Band Mobile Terminals Using 1 Bit Phase Controls

Publication Year: 2014, Page(s):1723 - 1730
Cited by:  Papers (3)
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This paper presents a new architecture for low-cost mobile terminal antennas suitable for linear-polarized satellite communications systems. It is based on a sparse phased array that uses 1-bit phase controls. In this way it is possible to reduce the array cost by employing simpler and fewer controls. Measurements of a prototype demonstrate the feasibility of the approach. View full abstract»

• ### Novel Parasitic Micro Strip Arrays for Low-Cost Active Phased Array Applications

Publication Year: 2014, Page(s):1731 - 1737
Cited by:  Papers (9)
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In this paper, a novel idea is proposed to construct low-cost phased arrays by using the multi-port property of array elements. The operating principles are illustrated and explained in detail. A three-element patch subarray with a periodic lattice is conceived according to the proposed idea. In the subarray, one patch antenna with multiple ports is designed as an active element which is directly ... View full abstract»

• ### Cluster Analysis for the Synthesis of Subarrayed Monopulse Antennas

Publication Year: 2014, Page(s):1738 - 1749
Cited by:  Papers (3)
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The design of monopulse radar systems requires the synthesis of both a sum pattern and a difference pattern, which is quite flexible and hard to be optimized for subarrayed antennas. In this study, innovative approaches to synthesize the optimal sum and difference patterns independently for subarrayed monopulse arrays are presented. By exploiting the relationship of the subarray partition and opti... View full abstract»

• ### Multiple Beams From Planar Arrays

Publication Year: 2014, Page(s):1750 - 1761
Cited by:  Papers (1)
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The paper describes a general theory of Multiple Beams from Planar Arrays establishing necessary and sufficient conditions for admitting a realizable lossless beamforming network. The developed theory applies concepts deriving from the Whittaker-Kotelnikov-Shannon (WKS) sampling theory, and from its multidimensional extension due to Miyakawa- Petersen- Middleton (MPM), to the problem of generating... View full abstract»

## Aims & Scope

IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief                                             Danilo Erricolo