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Showing 1 to 20 of 68 for “"Mutual Coupling"”.
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Mutual coupling in MIMO systems
… antenna pairs simultaneously, the effects of mutual coupling become a significant consideration in the quest to achieve high system performance. Therefore a clear understanding of mutual coupling effects with varying conditions in necessary for practical purposes. A lot of work has already …
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Mutual Coupling Reduction Techniques for Multi-band Base Station Antennas
… antenna design techniques which suppress mutual coupling in densely populated dual-polarized broadband multi-band base station antenna (BSA) arrays for improved radiation characteristics. Array face densification without the proposed techniques leads to undesirable interactions between …
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Analysis of phased array antenna radiation patterns including mutual coupling
… closed form that include the effects of radiated mutual coupling are investigated. The two basic methods considered are the classical array analysis method and the active element pattern methods. The theoretical derivations of the active element pattern methods are presented and the various types …
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Analysis and design of microstrip array antennas including mutual coupling
… between antenna elements is referred to as mutual coupling. This phenomenon can cause undesirable effects in an antenna array such as distortion of the radiation pattern and loss of efficiency. This report models mutual coupling in a scattering parameter context and utilizes microwave …
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Reduction Of Mutual Coupling In Antenna Technology Using Elliptically Shaped Metasurfaces
… metasurfaces for the goals of the reduction of mutual coupling between closely spaced antennas and the increase of antenna bandwidth. This is done first using a graphene monolayer as a cloak to decrease mutual coupling and restore radiation patterns for closely spaced antennas at THz …
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Investigation of mutual coupling effects on pattern null reconfigurable antennas in small adaptive arrays
… in small adaptive arrays. Unfortunately, strong mutual coupling between array elements, often a result of their close proximity, can significantly distort each element pattern and substantially affect the predicted adaptive array performance. In this work, the coupling between two null …
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Analytical Modeling and Design of High-Efficiency Input-Output Harmonic Tuned Microwave Power Amplifiers
… impairments like device nonlinearity, mismatch, mutual coupling, and channel temperature for high efficiency PA modeling, design, and reliable performance.In this thesis, power amplifier design methodologies have been comprehensively investigated by exploring and exploiting the input and output …
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Novel decoupling networks for small antenna arrays
… A small element spacing introduces strong mutual coupling between the array elements. The strong mutual coupling effect causes significant system performance degradation. A decoupling network can compensate for the mutual coupling effect to yield decoupled ports and fixed input impedances. …
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Design of a Broadband Array Using the Foursquare Radiating Element
… meet the demands of broadband arrays. However, mutual coupling between elements in a tightly spaced array can change the operating frequency and bandwidth from that of the single isolated element. Several research efforts have focused on minimizing the mutual coupling to maintain the frequency …
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Design, modelling and implementation of antennas using electromagnetic bandgap material and defected ground planes
… aim of improving performance, particularly the mutual coupling between the elements. The EBG structures have the unique capability to prevent or assist the propagation of electromagnetic waves in a specific band of frequencies, and have been incorporated here in antenna structures to improve …
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Investigation into the design of broadband singly-fed electromagnetically coupled patch (EMCP) antenna elements and arrays for circular polarisation
… on the broadband performance as well as the mutual coupling of the CP-EMCP elements. Both our theoretical and experimental results show that the CP-EMCP elements are robust in performance and have a low mutual coupling. When compared to the conventional stacked EMCP antennas and to the …
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The Impact of Antenna and RF System Characteristics on MIMO System Capacity
… be forced to closely space antenna elements, mutual coupling can greatly impact both capacity and diversity performance. To study strategies for mitigating mutual coupling performance degradation, an accurate receiver front-end model is necessary. This work realistically models amplifier noise …
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Design and optimization of dielectric resonator antenna arrays based on substrate integrated waveguide technology for millimeter-wave applications
… on two different slot orientations. The total mutual coupling between antennas is firstly extracted and modeled as a two port S-parameters. Two different methods are used to extract the total mutual coupling due to the difference of the slot configurations. Next, a new and fully adjustable …
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Design and analysis of reconfigurable MIMO antennas for next generation wireless communication systems
… gain from MIMO, it is essential to keep the mutual coupling between the antenna elements low so multiple signals can be resolved effectively. Given the lower operating frequency of the new systems as compared to the WiFi and the existing cellular standards, the antennas in portable devices …
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Design and Implementation of System Components for Radio Frequency Based Asset Tracking Devices to Enhance Location Based Services. Study of angle of arrival techniques, effects of mutual coupling, design of an angle of arrival algorithm, design of a novel miniature reconfigurable antenna optimised for wireless communication systems
… estimation and in addition it shows how the mutual couplings between the elements effect the overall estimation and how this error can be minimised by using a decoupling matrix. At the end, a novel miniaturised multi element reconfigurable antenna to represent the receiver base station is …
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Aspects of magnetisation and iron loss characteristics in switched-reluctance and permanent-magnet machines
… and finite element models. The effects of mutual coupling on the magnetisation characteristics are investigated through measurement and simulation. Results show that the degree of mutual coupling is strongly dependent on the winding arrangement of the machine. In the next section, the …
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Multiple feed reflector antenna analysis
… The element patterns may be different allowing mutual coupling to be included.
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Synthesis of Ultra-Wideband Array Antennas
… of the array element, and inter-element mutual coupling. Strictly speaking, distortion-free transmission or reception of ultra-wideband signals can be maintained if the magnitude of the radiated field of the array remains constant while its phase varies linearly with frequency over the …
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MIMO channel model
… element that affects the mean capacity is mutual coupling. The results show that the mutual coupling can be increased or decreased based on the close space between antennas.
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Topology optimization of metamaterials and applications to RF component design
… When placed next to a device, the effects of mutual coupling usually lead to an undesirable performance of the combined structure, which is coined a ``metamaterial-inspired device". Therefore, additional tuning of the resonant structure becomes necessary to achieve the desired performance of …
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