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A wireless power transfer system is proposed using a dual frequency retrodirective array for automatic beam steering and rectenna as a transmitter and receiver, respectively. Circularly polarized microstrip circular patch antennas with four shorting pins are used as array elements to suppress surface waves. The proposed design eliminates undesired coupling between array elements due to surface waves...
In the research project, a design concept of the mm-wave antenna array operating at 38 GHz is proposed by using a 64-element micorstrip patch antenna array. Theoretical and experimental study validates the design approach for the use of the Fifth generation (5G) wireless communication system.
This paper presents a three-axis decoupling stubloaded parallel dipole array antenna with tri-orthogonal polarization directivity. The decoupling characteristics are realized using the phase shifter composed of a quarter-wavelength stub placed at two sides of three parallel dipole array antenna for creating the opposite phase of the current distribution. Further, the quarter-wavelength stub is operated...
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...
This study proposes a simple self-calibration system that involves applying the phase-match method (PMM) in the far-field calibration of a deployed active array. An 8-element microstrip antenna array was applied to validate the proposed method experimentally.
A novel concept for a dual-polarized microstrip antenna array with a center frequency of 23.75 GHz is introduced. The array is composed of ten single square patch elements having equal resonance frequencies in both directions. The microstrip patches are rotated by 45 ° and linearly aligned to obtain a fan beam antenna characteristic. The feed structure is in seriesparallel configuration with best...
Electromagnetic fence designs have potential to provide border security especially for military tasks. In this paper, design, simulation and experimental results of a microstrip patch antenna array which may be suitable for an electromagnetic fence application at C-band are presented. Moreover, an experimental demonstration of the effect of a person on the signal propagation between the transmitter...
Recently, the development of composite right / left-handed transmission lines (CRLHTLs) has received considerable attention due to the unique propagation characteristics. Because of this increase in applications, CRLHTLs are being implemented in RF systems with other printed circuitry, such as microstrip antennas. In this paper, harmonics resonance frequency of different embedded CRLH-TL array has...
This work investigates the application of flares as a low-cost alternative for controlling the vertical beamwidth of a patch array antenna for S-band maritime radar applications. The use of flares reduces the number of array vertical elements needed to obtain the specified vertical beamwidth of the antenna and thus reducing the antenna cost. The optimal flare configuration has been found to be asymmetrical...
In this paper switched beam smart antenna systems are investigated to improve the performance of wireless networks. The microstrip technology of antenna arrays with Butler matrix topology as a beam-former is used to implement the switched beam smart antenna system. The optimum design of a 8×8 planar Butler matrix array, operating at 2.4 GHz for WLAN applications. Systems design and optimization was...
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...
A single-ended microstrip grid array antenna has been designed and measured for 24 GHz automotive radars application. It has been designed on Rogers 5880 substrate with dimensions of 60×60×0.787 mm. The antenna exhibits 2.45 GHz impedance bandwidth, 19.26 dBi peak realized gain and broadside pencil-beam radiation pattern with low side lobe and weak cross-polarization.
Metamaterials represent a new paradigm in electromagnetic science and technology. They have already leaded to many unprecedented microwave applications, which may be classified in three categories: guided-wave, radiated-wave and refracted-wave applications. Control and manipulation of electromagnetic waves is at the heart of many industries from wireless communication, Internet and optical data storage...
A planar substrate integrated waveguide slot-fed microstrip grid array antenna for the frequency range 76–81 GHz is presented. The antenna is realized on a standard soft RF substrate. It is fed using a transverse slot in a substrate integrated waveguide on a separate substrate layer below the antenna. A wideband microstrip to substrate integrated waveguide is designed to feed the antenna. Measurement...
This work proposes a design of single element and two element antenna array by using SIW (substrate integrated waveguide) technology. SIW techniques provides low cost, small size and convenient integration with planer circuit. Using antenna array enhance the directivity and gain of the proposed antenna. The dimension of proposed antenna is 37 × 45.5mm2 and substrate height is 1.6mm. The proposed antenna...
A planar 32×32-slot array antenna at 60 GHz including microstrip-ridge gap waveguide distribution network is analyzed using modular approach. This approach gives a fast estimation of the return loss of a large array including the corporate distribution network, and allows for an improvement of the return loss by tuning the length of the branches of the power dividers in the corporate network.
This paper presents a 45 degree linearly polarized microstrip comb-line antenna array for the 76.5 GHz automotive radar system. The 13-element array is implemented on Rogers RO3003 substrate with a size of 20 × 2 mm2. The measured gain of the antenna is 11.4 dBi and the sidelobe level is below −16.5 dB at 76.5 GHz.
This paper deals with the design and analysis of pyramidal microstrip antenna for GPS application in order to find the direction of arrival of signals. The 4 antenna elements are implemented on inclined walls to reduce coupling between antenna elements. Because of the inclined walls, antenna array is able to have a reduced diameter. Moreover, a monopole auxiliary antenna is added to compensate channel...
Antenna design choices are influenced by many factors, including material and manufacturing limitations, space constraints and which antenna topologies and techniques the designer is already familiar with. During the design process, engineers need to make trade-offs between competing requirements. Being able to process information and use CEM tools efficiently can be critical in learning and making...
This paper presents a fast and efficient procedure for pre-designing circumferential arrays of cylindrical hybrid microstrip antennas. Simulated radiation patterns and input impedance are in good agreement with experimental results.
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