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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...
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...
In this paper we investigated characteristics of the HFSS model of antenna array of rectangular waveguides with frequency-selective surfaces (FSS-shield) of semielliptical shape with expansion of operating band. It is shown that the region of transparency of the shield displaces down in frequency in comparison with plane the infinite FSS. In this region the shield slightly changes the form of the...
In the paper the radiation patterns of equidistant, random and fractal antenna arrays were simulated and analyzed. We demonstrated efficiency of suppression of higher orders interference maxima due to fractal distribution of sources in the array as compared to their random distribution.
The characteristics of ultra-wideband Vivaldi radiators both single antennas and antenna arrays were investigated. Antenna Vivaldi includes the original feeding system, which does not contain a cavity. The possibility of expanding of radiator frequency band by using radar-absorbing elements was investigated It is shown that the operating frequency band of Vivaldi radiator in the array in the plane...
A planar dual-band antenna array for point-to-point communication is presented. The proposed compact antenna array operates at 2.4-2.5 GHz (4%) and 5.1-5.5 GHz (7.5%) with |S11| <; -10 dB, and corresponding gains of 11-13.3 dBi and 10.6-14.5 dBi respectively. It consists of four branches suspended at a height of 5 mm above a 250 × 250 mm ground plane. Each quarter consists of a series-fed...
The power and directivity characteristics of the planar regular antenna array operating in mode of the receiving the UWB signal with uniform spectrum in frequency range of 3:1. Expressions for calculation of the directivity and the effective area of such an antenna array are obtained. Results of computations of the 5×5 array performance are presented.
In this work, characteristics of ultra-wideband "Vivaldi" radiators in single use and also in array condition was investigated. One of the design features in this antenna is the original arousing detail, eliminating a resonator. There is a research about abilities of band enhancement using absorber. Significant bandwidth widening to the left of arrayed "Vivaldi" radiators in E-plane...
Design of non-uniform linear antenna arrays is one of the most important electromagnetic optimization problems of current interest. In this article, an adaptive Differential Evolution (DE) algorithm has been used to optimize the spacing between the elements of the linear array to produce a radiation pattern with minimum side lobe level and null placement control. DE is arguably one of the best real...
A novel 1 × 4 planar UWB antenna array is proposed. The utilized single element is a compact planar circular slot micro-strip antenna. The feeding network is 1 to 4 Wilkinson power divider. The bandwidth of the antenna array is from 3.1GHz to 12.4GHz and the radiation pattern is bidirectional.
This paper introduces a procedure for multi-objective optimization in antenna design. The problem described consists of the optimization of a seven element antenna array to improve the radiating performance. The three objectives considered are the minimization of the return loss, together with the minimization of the cross polarization and the mutual coupling between the ports; simultaneously, the...
The influence of model errors on radiation pattern of a hemispherical aperture antennas arrays is studied in the paper. Analysis was made with a developed moment method program that analyzes a particular influence of an azimuth and elevation position and local angle errors of the second waveguide as well as model dimension errors on radiation pattern. The spectral-domain approach to the analysis of...
We have developed a 1 times 4 wideband array structure for multiple wireless applications. The utilized single element is a wide-slot antenna and has demonstrated ultra-wideband operation characteristics. The proposed antenna system associated with feeding network and antenna elements can be integrated in a single substrate. Consequently, such a design is with low fabrication and assembly cost and...
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