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In this paper, a beamforming system for LTE- Advanced based on Array sampling technology is proposed. Antenna Array that has been designed covers LTE mid and high bands. RF multiplexer 8x1 switch has been designed and simulated. The system is composed of agile RF frontend and FPGA digital signal processing unit.
A wireless system-on-chip with integrated antenna, power harvesting and biosensors is presented that is small enough, 200µm × 200µm × 100µm, to allow painless injection. Small device size is enabled by: a 13µm × 20µm 1nA current reference; optical clock recovery; low voltage inverting dc-dc to enable use of higher quantum efficiency diodes; on-chip resonant 2.4GHz antenna; and array scanning reader...
This paper proposes a method of constructing an antenna array on the typical ground plane of the modern mobile terminal. An IFA and a slot in a metal frame antenna elements have been used to illustrate the proposed method. The radiation pattern of the element is recorded at the chosen number of the discrete locations on the ground plane. Antenna elements at the positions, where the boresight is similar...
This paper presents a method with which to calculate the maximum scan error due to phase quantization in the visible region of dense phased arrays. The scan error is expressed as a function of the density ratio and the number of bits being used for digitization. A closed-form expression is derived with which the maximum scan error as well as the maximum scan range in the visible region of the array...
Location prevails as a piece of crucial information for decision-making processes. Whereas positioning in outdoor environments can be mainly attributed to Global Navigation Satellite Systems, no single technology can be appointed for accurate indoor localization. Many approaches exist, mostly relying on line-of-sight propagation from a mobile node to multiple anchor nodes. These solutions not only...
Knowing the electric fields that may be encountered in the proximity of large array antennas is critical for determining the compatibility of equipment near that antenna. Given a few parameters such as effective area, frequency and power, the electric field magnitudes at any given range can be approximated within easily determined boundaries using well-understood electromagnetic theory. This paper...
This work examines the behavior of a two- element sea water antenna array. A basic transmission formulation is introduced first to understand the mechanisms of the sea water phased array antenna. We then present a brief overview of phased array theory, followed by a discussion of the design and resulting measurements. Numerical simulations are compared to measured data to show the generation of sum...
We present an iterative method for joint antenna-array calibration and direction of arrival estimation using millimeter-wave (mm-Wave) radar operating at 77 GHz. The calibration compensates for antennaarray coupling, and phase and gain errors, and does not require any training data. This method is well suited for applications, such as automotive radars, where multiple antenna elements are packaged...
The Direction of Arrival (DoA) estimation of signals impinging on a failed antenna array is approached as an optimization problem and solved by using particle swarm optimization (PSO) technique with single snapshot. The performance and usefulness of this algorithm is analyzed under different failure scenarios and also in different noisy environment. In this paper we have made a study on the tolerance...
In this study a miniaturized asymmetric planar antenna array was built and analyzed. In order to reduce the coupling between the elements and to improve the impedance matching of the array two techniques were employed: slightly shifted one of the elements and use a ferrite based transformer. In the design, the miniaturization is achieved by placing the elements of the arrangement closed to each other...
This paper explains the design and implementation process of a microstrip antenna array on Ku-Band for satellite television reception. The proposed antenna was designed to operate at 11.8 GHz to 12.8 GHz with reflection coefficient or return loss ≤ 10 dB, and the antenna gain of ≥ 20 dBi. Antenna polarization was designed to be linear. The antenna was then fabricated on FR4 materials and shows that...
We are presenting the design of a high gain printed antenna array consisting of 420 identical patch antennas intended for FMCW radar at Ku band. The array exhibits 3 dB-beamwidths of 2° and 10° in H and E plane, respectively, side lobe suppression better than 20 dB, gain about 30 dBi and VSWR less than 2 in the frequency range 17.1 – 17.6 GHz. Excellent antenna efficiency that is between 60 and 70...
The paper investigates the feeding structures for printed antenna arrays with parallel reflector and their influences on antenna parameters. Two printed antenna arrays are presented. The first consists of ten series fed symmetrical dipoles with tapered impedances. The second is the array of eight symmetrical dipoles that are fed by a tapered distribution. The feeding structures for both antennas are...
In this letter the design and simulation of an 0.43GHz P/UHF band microstrip patch antenna as single element, 2, 4, 8 & 16-element linear array using RT/duroid 6002 substrate was proposed. An inter-element spacing of 0.73λ for limited scan angle coverage. Wind profiling radar operating in Doppler beam swinging mode and spaced antenna drift technique mode needs to have a large aperture antenna...
In this paper the antenna array with flat rectangular radiators in the unlimited homogenous isotropic media is investigated. The analysis problem of this antenna system with account the mutual coupling of radiators is reduced to solving the system of integral equations with regard to the current distribution on radiators. By applying the Galerkin method the system of linear algebraic equations with...
In this paper, we propose a precorrelation direction lock loop (DiLL) scheme and a new modification factor estimation method for the global navigation satellite system (GNSS) receivers. The proposed scheme executes spatial correlation before code demodulator and does not need to do code demodulation for every antenna element. It can decrease the number of code demodulator to 3 regardless of the array...
The increasing demand for safety and security in the different means of transport (carriers) leads to a growing need for real-time video monitoring systems. The significant limitation was that the video feed could only be stored locally and downloaded once the carrier was arrived at the destination. Recently, an important progress has been made for overcoming this challenge, and we are starting to...
An adaptive beam forming algorithm with antenna array model based on quantum-behaved particle swarm optimization (QPSO) is proposed for improving existent problems of limited beam modulation, unsatisfactory side lobe suppression and poor adaptability. By adjusting beam direction with matrix-weighting, optimizing initial phase and radius of the antenna array, and by tracking user intelligently with...
The paper describes an antenna demonstrator for 3D radar at s-band. It is composed as monopulse two-dimensional antenna array with dipoles printed on a dielectric substrate. The monopulse comparator is integrated at the horizontal feeding network. The antenna array operates in S-band with a beamwidth of 2.2 degrees in the H-plane and 15 degrees in the E-plane. The obtained gain is more than 28 dB.
The aim of this paper is to design, develop and simulate a linear patch antenna array working at 9.5 GHZ and integrate it on a microwave laminate. First, two rectangular patch antennas, one with a direct feed and the other with an inset feed are designed and compared to each other then 1×8 power divider is designed and simulated. Finally, eight rectangular radiating patches on a low dielectric constant...
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