Jan Puskely

• Delft University of Technology

In this paper, a concept of a phased antenna array based on substrate integrated waveguide technology (SIW) for 5G base stations is proposed. The array has a cosecant radiation pattern in the vertical plane for uniform illumination in a sector area. The array itself consists of sixteen SIW travelling wave sub-arrays of twelve slot-coupled microstri...

A novel basic antenna element for travelling‐wave substrate integrated waveguide (SIW) arrays is proposed in this study. The antenna element is based on a transverse slot and newly complemented by a pair of vias used for matching and a phase shifter. By changing the geometries of the slot and the phase shifter, the amplitude and phase of a radiated...

An unconventional, yet quasi‐modular base station phased array architecture synthesis technique is proposed for multiuser fifth‐generation applications. By keeping uniform amplitudes and linearly progressing phases at the elements of an optimal irregular array, power‐efficient side lobe suppression is achieved for effective inter‐user interference...

An extended-feature, system-driven convex algorithm for the synthesis of uniform-amplitude, irregular planar phased arrays with simultaneous multi-beam optimization for mm-wave 5G base station applications in multi-user scenarios is presented. The inter-user interferences are suppressed by minimizing the maximum side lobe level (SLL) for a beam sca...

The future fifth generation (5G) systems will aim to design low‐cost phased array base station antenna systems at mm‐waves for simultaneous multiple beamforming with enhanced spatial multiplexing, limited interference, acceptable power consumption, suitable processing complexity, and passive cooling. In this study, a multi‐user space division multi...

This paper presents a 5G downlink system simulation model for a hybrid multi-user beamforming technique at the base station. The presented technique employs power flux equalization in the elevation plane using a fixed analog cosecant shaped beam and digital beamforming in the azimuth plane. The system performances of various beamforming algorithms...

A novel hybrid beamforming architecture based on a phased array of active multiport subarrays is proposed for multi-user 5G applications. The subarrays have multiple simultaneous fixed beams which are smartly combined at the user locations with relatively large gains towards the intended co-frequency users and sufficiently low inter-user interferen...

Minimization of the maximum sidelobe level for a given array geometry, amplitude distribution and nulling sectors by phase-only adjustment of the element coefficients is studied. Nonlinear optimization problem for phase distribution is solved using a novel iterative convex optimization algorithm which includes mutual coupling effects and exploits s...

The performance of space-tapered multi-beam arrays with minimized side lobe levels is statistically evaluated in a line-of-sight propagation environment within a cell sector in terms of the signal-to-interference-plus-noise ratio at the multiple user ends. Comparative analyses are performed to examine the advantages of space-tapered, irregular arra...

The thermal and electromagnetic effects of varying the ground plane thickness and aperture size of the 5G integrated base station antennas are investigated. A double-sided PCB structure is designed with antennas and digital beamforming chips on the opposite sides. Fully-passive cooling is achieved by using fanless CPU coolers attached to the chips....

Heat removal capabilities and radiation performances of several sparse antenna array topologies are studied for cooling enhancement in 5G millimeter-wave base station antennas. Both electromagnetic and thermal aspects are jointly considered for the first time in array layout optimization and a novel connection between layout sparsity and thermal ma...

Optimization of heat source distribution in two dimensional heat conduction for electronic cooling problem is considered. Convex optimization is applied to this problem for the first time by reformulating the objective function and the non-convex constraints. Mathematical analysis is performed to describe the heat source equation and the combinator...

A tapered slot antenna element capable of reconfiguring its beam direction is presented. As the basic element, a Vivaldi antenna fed by a substrate integrated waveguide is chosen. The Vivaldi antenna is complemented by a parasitic planar array of small metallic patches placed in front of its aperture and by corrugated edges of the Vivaldi antenna's...

Presents a reply to comments on the paper, ”Comments on Wideband Skin-Equivalent Phantom for V- and W-Band,”(Aminzaech, R., et al),IEEE Antennas Wirel. Propag. Letters.

A novel two-port, dual-band square-ring microstrip antenna element for wide-angle scanning planar phased array is proposed. The two ports are used to operate the antenna array over the L and S radar bands. Microstrip square-ring radiators are chosen due to their smaller dimensions compared to the conventional microstrip patch. To extend operational...

In this letter, a novel concept of a high-gain Vivaldi antenna operating in the $K_{a}$ frequency band is proposed. The antenna is fed by the substrate integrated waveguide. The concept overcomes shortcomings of conventional antipodal Vivaldi antenna using dielectric load with printed metal transition and transverse ripples. The added parts are opt...

This study deals with a design procedure and achieved parameters of a microstrip patch antenna array fed by a substrate integrated waveguide (SIW) operating at V-band. The antenna array consists of 6 × 8 microstrip patch antennas which are aperture coupled with an SIW-based feeding network. The antenna design is performed in a full-wave electromagn...

In the paper, we describe a novel H-plane horn antenna for an experimental wireless link operating in frequency bands 71 to 76 GHz and 81 to 86 GHz. The horn antenna was designed considering a substrate integrated waveguide (SIW) technology, The waveguide WR12 was used as a feeder. In order to improve transition between a thin-substrate SIW horn an...

In this letter, a wideband semisolid skin-equivalent phantom with dielectric properties close to human skin in the V and W band is proposed. The constituents of the phantom are deionized water, agar, and gelatin powder. The phantom has been fabricated and validated by an open ended waveguide method. Since it comprises of low-cost constituents and i...

In this letter, we describe the design and simulation of on-body antennas for wireless body area network (WBAN) communication operating in the 61-GHz ISM frequency band. We developed a disc-like concept of an antenna. Instead of a direct connection between a circular disc and a feeding pin, the electromagnetic coupling is used. This concept enables...

In this paper, we compare three different concepts of compact antenna arrays fed by substrate integrated waveguides (SIW). Antenna concepts differ in the type of radiators. Slots represent magnetic linear radiators, patches are electric surface radiators, and Vivaldi slots belong to travelling-wave antennas. Hence, the SIW feeders have to exploit d...

In the paper, we describe the design and simulation of a button-like antenna for wireless body area network (WBAN) communication operating in the 61 GHz ISM frequency band. We developed a disc-like concept of an antenna. Instead of a direct connection between a circular disc and a feeding pin, the electromagnetic coupling is used. This concept enab...

In the paper, we describe analysis of Vivaldi antenna array aimed for microwave image application and SAR application operating at Ka band. The antenna array is fed by a SIW feed network for its low insertion loss and broadband performances in millimeter wave range. In our proposal we have replaced the large feed network by a simple relatively broa...

In the paper, we describe a concept of an experimental wireless link operating in frequency bands 71 to 76 GHz and 81 to 86 GHz. The link is based on the converter FC1003E/03 produced by Sivers IMA. For the link, a conventional horn antenna and a planar horn antenna were designed. Parameters of the link were measured in indoor environment. The pape...

This paper deals with an error analysis of the phase retrieval algorithm combining the minimization method based on global optimization and the iterative method representing the local approach. The method exploits amplitude measurements on two planes placed in different distances from the measured antenna. In the paper, robustness of the algorithm...

In this work we present a stacked high-impedance surface (HIS) for low-profile, high-gain, 5 GHz WLAN antennas. The structure consists of two layers: a lower mushroom layer and an upper planar layer. We demonstrate that the stacked geometry has much better properties than conventional single-layer structures for achieving simultaneously surface-wav...

In the paper, we developed a relatively broadband high-gain small antenna array composed of two layers. The antenna operates at about 27.0 GHz (Ka-band). First, we designed a bottom layer composed of 2×2 patches with an inset feed. Then, we added a second layer with parasitic patches to obtain better impedance and radiation properties. Since the an...

A design of a radome-covered slot antenna array based on Substrate Integrated Waveguide (SIW) technology is presented in this paper. The design method consists of the analysis of an isolated radiating element, the synthesis of a linear array, the optimization of a planar array, and the development of a power divider with a transition from a feeding...

The Fourier iterative algorithm (FIA) is a well-known planar phase retrieval method. The algorithm uses conventional amplitude measurements on two surfaces placed in different distances from the measured antenna. In this paper FIA will be applied in cylindrical geometry. In this case near-field transformations use high order Hankel functions which...

In the paper, we describe two antenna concepts for reliable long range links. First, we model separate antenna elements to investigate their electrical properties in a frequency band from 4.4 to 5.0 GHz. We compare electrical properties of designed antennas with required ones and we design large antenna arrays (8×8). In order to meet the radiation...

In this paper, we give a comparative study of several planar antenna concepts for reliable long range links in a tactical environment. The antenna elements are studied in terms of their electrical properties (bandwidth, reflection coefficient and radiation characteristics) and construction (robustness and material consumption). First, we model sing...

In this paper, a new approach is proposed to face the problem of local minima in the iterative Fourier method applied to phaseless near-field measurements. A global optimization procedure is used in conjunction with a compression method to properly reduce the number of unknowns in the optimization process, thus inhibiting the trapping into local so...

The Car2Car communication will use a reserved frequency band at 5.9 GHz. One of the key requirements for a Car2Car antenna is that the gain is concentrated in the horizontal plane, which is a problem due to the limited ground plane of a car roof. The influence of roof curvature, roof racks and panorama glass roofs were investigated to quantify them...

A novel minimization method based on the principle of Fourier iterative method combining a global optimization with a compression method is used. The method uses conventional amplitude measurements on two surfaces placed in different distances from the antenna aperture. The global Particle Swarm Optimization (PSO) is used to minimize the fitness fu...

The novel approach exploits the principle of the conventional two-plane amplitude measurements for the reconstruction of the unknown electric field distribution on the antenna aperture. The method combines a global optimization with a compression method. The global optimization method (GO) is used to minimize the functional, and the compression met...

The novel approach exploits the principle of the conventional two-plane amplitude measurements for the reconstruction of the unknown electric field distribution on the antenna aperture. The method combines a global optimization with a compression method. The global optimization method (GO) is used to minimize the functional, and the compression met...

In this paper, the phase retrieval method exploiting global optimization is presented. This minimization approach is based on two amplitude measurements in the near-field of the AUT. Two different approaches calculating the error function are presented and compared. The first approach is classical functional method and second one is based on the pr...

This paper deals with a method for determining the radiation pattern of the omnidirectional antennas. The minimization method is used for the reconstruction of the FF antenna patterns from NF phaseless measurements on two cylinders in different distances from the antenna. The global optimization techniques were used for the minimization process. Th...

In this paper, we present an optimization procedure exploiting a functional minimization method that utilizes the phaseless electric field data over two plane surfaces for the reconstruction of the phase distribution on the aperture of the measured antenna. The performance of a real-valued genetic algorithm (RVGA) applied to the functional minimiza...

This paper deals with a method of the radiation pattern determination of the directional antennas. The method combining both the functional minimization method and the Fourier iterative algorithm is based on the phaseless near-field measurement on two plane surfaces. The method is used for a reconstruction of the phase distribution on the aperture...

The paper analyzes results of numerical simulations of the electromagnetic field distribution in the near region of the dipole arrays used in base stations of mobile communication systems (the model of the antenna GSM900). The computation method is based on formulas for the near-field radiation of elementary dipole arrays. In order to verify result...

The paper deals with the reconstruction method of the radiation pattern of directional antennas. The method is based on the amplitude near-field measurement (or simulation) on two plane surfaces, and consists of two steps. First, a global optimization is used to find an initial estimation. Second, a common Fourier iterative algorithm is created to...

The paper analyzes results of numerical simulations of the electromagnetic field distribution in the near region of the dipole arrays used in base stations of mobile communication systems (the model of the antenna GSM900). The computation method is based on formulas for the near-field radiation of elementary dipole arrays. In order to verify result...

The purpose of this paper is analysis of electromagnetic field distribution in parallel-plate EMC simulator. The simulator is composed of three flat-plate transmission-line sections which are approximate by thin wire structures. Paper presents simulation and measured results of simulator working region in frequency domain.