IEEE Transactions on Antennas and Propagation

Issue 5 • May 2018

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Displaying Results 1 - 25 of 65

Publication Year: 2018, Page(s):C1 - 2178
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• IEEE Transactions on Antennas and Propagation

Publication Year: 2018, Page(s): C2
| PDF (65 KB)
• Radiation Efficiency Limits for Elementary Antenna Shapes

Publication Year: 2018, Page(s):2179 - 2187
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Both the bandwidth and efficiency of antennas decrease as the physical size decreases. Bounds on the Q-factor, inversely related to bandwidth, have been studied rigorously and reported extensively, but published investigations of efficiency limits are much less common. In this paper, expressions for the minimum dissipation ratio, and hence maximum efficiency, are derived using circuits that repres... View full abstract»

• Interferometric Sounding Using a Metamaterial-Based Compressive Reflector Antenna

Publication Year: 2018, Page(s):2188 - 2198
| | PDF (3344 KB)

This paper describes a new coded interferometric system for sensing the physical temperature radiated from the Earth’s surface. The proposed system consists of a compressive reflector antenna (CRA) coated with metamaterial absorbers (MMAs). The CRA and the MMA are used to code the received electromagnetic (EM) field in space and in frequency, at the focal plane array. The MMA is modeled by ... View full abstract»

• Highly Efficient Impulse-Radio Ultra-Wideband Cavity-Backed Slot Antenna in Stacked Air-Filled Substrate Integrated Waveguide Technology

Publication Year: 2018, Page(s):2199 - 2209
| | PDF (3189 KB)

An impulse-radio ultra-wideband (IR-UWB) cavity-backed slot antenna covering the [5.9803; 6.9989] GHz frequency band of the IEEE 802.15.4a-2011 standard is designed and implemented in an air-filled substrate integrated waveguide (AFSIW) technology for localization applications with an accuracy of at least 3 cm. By relying on both frequency- and time-domain optimization, the antenna achieves excell... View full abstract»

• Low-Profile Conical-Pattern Slot Antenna With Wideband Performance Using Artificial Magnetic Conductors

Publication Year: 2018, Page(s):2210 - 2218
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A slot antenna with conical patterns and wideband performance based on artificial magnetic conductors (AMCs) is presented in this paper. It has four symmetrical square radiating slots and a meandered feeding network etched on the both sides of the upper substrate to achieve a compact size. Wideband performance is achieved by tuning the resonant frequencies of the one-wavelength slot and quarter-wa... View full abstract»

• A Systematic Investigation of Rectangular Patch Antenna Bending Effects for Wearable Applications

Publication Year: 2018, Page(s):2219 - 2228
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The emerging applications for wearable electronics have experienced enormous growth over the last decade. Antennas, being one of the critical components in modern wireless devices, thus need to be specifically designed to function while being worn and bent. In this paper, we present a systematic investigation of the effects of bending applied on wearable patch antennas over cylindrical surfaces. T... View full abstract»

• A Broadband Horizontally Polarized Omnidirectional Antenna for VHF Application

Publication Year: 2018, Page(s):2229 - 2235
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A novel broadband horizontally polarized (HP) omnidirectional antenna is proposed for meteor-burst communication system in VHF. The proposed antenna is composed of three bowtie dipoles, which are concentrically placed to form a loop antenna. The bowtie dipole is shorted at the terminal by folded elements in order to reduce antenna size. The bowtie dipoles are fed by a three-way power divider. A sl... View full abstract»

• 3-D Printed Inhomogeneous Substrate and Superstrate for Application in Dual-Band and Dual-CP Stacked Patch Antenna

Publication Year: 2018, Page(s):2236 - 2244
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This paper presents the extensive study on the effects of inhomogeneous substrate and superstrate for the exploration of dual-band and dual-circularly polarized patch antenna. As well known to all, the technology for circularly polarized (CP) patch antenna has been often restrictedly achieved by altering the shape of patch conductor surface by a few standard manufacturing processes. Benefited from... View full abstract»

• Miniature Coplanar-Fed Folded Patch for Metal Mountable UHF RFID Tag

Publication Year: 2018, Page(s):2245 - 2253
| | PDF (2576 KB)

A folded patch, which is centrally fed by a coplanar feedline, is proposed for designing a miniature UHF tag antenna for mounting on metal surfaces. The tag is designed using a flexible polyethylene terephthalate substrate with a very compact size of 25 $text {mm} times 40,,text {mm} times 3$ mm ( View full abstract»

• Topology Optimization of Conical-Beam Antennas Exploiting Rotational Symmetry

Publication Year: 2018, Page(s):2254 - 2261
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Microstrip conical-beam antennas are designed by the topology optimization of metallic patches combining the discrete optimization of vias. The antennas are designed to be angular-periodic structures with eight identical sectors, which makes the rotational symmetric radiation pattern more easily to be achieved and the optimization problem much easier to be solved. A restarting technique is introdu... View full abstract»

• Fully Textile-Integrated Microstrip-Fed Slot Antenna for Dedicated Short-Range Communications

Publication Year: 2018, Page(s):2262 - 2270
| | PDF (4919 KB)

A novel fully textile-integrated antenna based on a slotted short-circuited microstrip line has been designed, manufactured, and experimentally validated for its use in automobile upholsteries for dedicated short-range communications. The antenna can be manufactured using an industrial loom and a laser prototyping machine, avoiding subsequent treatments, sewing procedures, or coatings. The manufac... View full abstract»

• Pattern-Reconfigurable, Flexible, Wideband, Directive, Electrically Small Near-Field Resonant Parasitic Antenna

Publication Year: 2018, Page(s):2271 - 2280
| | PDF (2353 KB)

A pattern-reconfigurable, flexible, wideband, directive, electrically small near-field resonant parasitic (NFRP) antenna is presented. The antenna consists of a pair of Egyptian axe dipole NFRP elements, together with a pair of shaped metallic strips that act as the driven element and are fed by a coaxial cable. These NFRP and driven elements are designed to achieve compactness. Two pairs of p-i-n... View full abstract»

• Broadband Reflector Antenna With High Isolation Feed for Full-Duplex Applications

Publication Year: 2018, Page(s):2281 - 2290
| | PDF (4328 KB)

A broadband circularly polarized reflector antenna with high isolation between transmitter and receiver channels is demonstrated theoretically and experimentally. The proposed antenna achieves |S11| <; -10 dB, gain > 21 dBic (with a maximum value of 28 dBic) over the 4-8 GHz operating frequency range. A dual-polarized coaxial cavity antenna is designed to serve as the feed for the... View full abstract»

• $E$ -Band Substrate Integrated Waveguide Orthomode Transducer Integrated With Dual-Polarized Horn Antenna

Publication Year: 2018, Page(s):2291 - 2298
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This paper presents an E-band substrate integrated waveguide (SIW) dual-polarized antenna system, which consists of an orthomode transducer (OMT) and a dual-polarized horn antenna. On the basis of a two-layer substrate design, the function of OMT is realized by utilizing an SIW section to excite TE10 mode for the vertical polarization, a quasi-coaxial stripline to excite quasi-TEM mode for the hor... View full abstract»

• Novel Broadband Antennas for Future Mobile Communications

Publication Year: 2018, Page(s):2299 - 2308
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Compact planar antipodal endfire broadband antennas based on novel windmilllike shape are proposed in this paper for future mobile applications. Asymmetric structure of the proposed antennas makes these antennas to radiate in boresight direction, while antipodal structure provides wideband behavior. In the first phase, an ultrawideband antenna is designed using an FR4 substrate with a size of 34 m... View full abstract»

• Improved Statistical Model on the Effect of Random Errors in the Phase and Amplitude of Element Excitations on the Array Radiation Pattern

Publication Year: 2018, Page(s):2309 - 2317
| | PDF (2041 KB)

Due to errors in the phase and amplitude of element excitations in an antenna array, the array radiation pattern gets distorted. In order to derive statistical results on this distortion, specifically on determining the probability of exceeding a certain sidelobe level (SLL), it is often assumed that the magnitude of the array amplitude pattern follows a Rician distribution. It is shown that the R... View full abstract»

• A Hybrid Nonlinear Method for Array Thinning

Publication Year: 2018, Page(s):2318 - 2325
| | PDF (3024 KB)

A nonlinear method for array thinning is proposed. The method is based on hybrid usage of genetic algorithm (GA) and nonlinear apodization. The method proposes a special layout, which consists of two subarrays. Layout and weights for the subarray having larger aperture are designed by GA. Layout and weights for the second subarray are determined according to results of the aforementioned design. D... View full abstract»

• High-Isolation, Low Cross-Polarization, Dual- Polarization, Hybrid Feed Microstrip Patch Array Antenna for MPAR Application

Publication Year: 2018, Page(s):2326 - 2332
| | PDF (2999 KB)

This paper presents a high-isolation, low crosspolarization dual-polarized patch antenna for multifunction phased array radar applications. Its hybrid feed design has been implemented, and the vertical and horizontal polarizations are excited by a balanced-probe feed and a slot-coupled feed, respectively. Simulations and measurements have demonstrated an input isolation of 45 and 43 dB between the... View full abstract»

• Sparse Array Beampattern Synthesis via Alternating Direction Method of Multipliers

Publication Year: 2018, Page(s):2333 - 2345
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In this paper, we devise beampattern synthesis algorithms for sparse arrays using the alternating direction method of multipliers (ADMM). Unlike the usual weighted l1 norm, we utilize the lp norm of the array weight vector, where 0 <; p <; 1, as the objective function to enhance its sparsity for arbitrary array configurations. To solve the resultant nonconvex and nonlinear optimization probl... View full abstract»

• Antenna Arrays Emulate Metamaterial-Based Carpet Cloak Over a Wide Angular and Frequency Bandwidth

Publication Year: 2018, Page(s):2346 - 2353
| | PDF (1618 KB)

We present the concept and the design of an antenna-based device for restoring the reflection from a ground plane over a broad incidence angular range, when an arbitrarily large object is placed on it. The proposed device is based on fully passive antenna arrays, whose elements are properly connected to each other by following a mirrored version of the Van Atta configuration used for realizing ret... View full abstract»

• A New Approach to Design Circularly Polarized Beam-Steering Antenna Arrays Without Phase Shift Circuits

Publication Year: 2018, Page(s):2354 - 2364
| | PDF (5501 KB)

A new approach to generate beam steering for the circularly polarized (CP) antenna array without phase shift circuits is proposed. The proposed approach is a low cost one compared with those with phase shifters. It is found that in spherical coordinate system (r, θ, and φ), for any constant r and θ, as φ varies from 0 to 2π, the phase of the CP antenna's copolari... View full abstract»

• Wideband Dual-Polarized Linear Array Antenna for Random-LOS OTA Measurement

Publication Year: 2018, Page(s):2365 - 2373
| | PDF (3283 KB)

In this paper, an 8 × 1 dual-polarized linear array antenna is proposed for a random line-of-sight over-the-air measurement system. The proposed array antenna operates over the frequency band of 1.6-2.7 GHz. A self-grounded bowtie is optimized as the array element. A compact wideband two-port feeding network is designed and manufactured to differentially excite each element, while each port... View full abstract»

• A Compact Dual-Band Dual-Polarized Microstrip Antenna Array for MIMO-SAR Applications

Publication Year: 2018, Page(s):2374 - 2381
| | PDF (4544 KB)

This paper presents a compact dual-band dualpolarized microstrip antenna array with wide bandwidth and low profile for multiple-input multiple-output (MIMO) synthetic aperture radarimagery applications where both high resolution and portability are required. This array has a stacked structure, consisting of two shared-aperture dual-band orthogonalpolarized sub-arrays with high isolation. Each pair... View full abstract»

• Substrate-Integrated E-Plane Waveguide Horn Antenna and Antenna Array

Publication Year: 2018, Page(s):2382 - 2391
| | PDF (4591 KB)

Substrate-integrated waveguide (SIW) is successful to design H-plane horn antenna but fails to design E-plane horn antenna. It is because the plated through holes in SIW only support vertical current but not longitudinal current, both of which are required by the E-plane horn antenna. In this paper, a novel substrate-integrated E-plane waveguide (SIEW) horn antenna is proposed and used to design a... View full abstract»

Aims & Scope

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

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Meet Our Editors

Editor-in-Chief                                             Danilo Erricolo