Near-field antenna measurements
A basic overview of the theory of planar antenna near-field measurements. Determination of far-field pattern from a near-field measurement. Advantages of this technique compared to far-field antenna measurement. Brief history of near-field scanning.
Подобные документы
Characteristics of different flat multi-band antennas, their purpose, features of the production, and measurement. Description of antenna parameters, their advantages and disadvantages. The results of the modal and full-wave analysis of antennas.
контрольная работа, добавлен 05.04.2015The concept and the basic principles of electronics as a scientific field, the history of its development and modern achievements. Classification and types of antennas, basics principles of operation. The materials used in the manufacture of antennas.
учебное пособие, добавлен 25.11.2013The developed antenna system for use in measuring equipment. A technical description of the antenna system. The results of measurements and their comparison with the results obtained with the help of standard antennas included in the measuring equipment.
статья, добавлен 27.07.2021The antenna elements are arranged along a circle arc and an ellipse arc. The expressions for the equivalent aperture of the antenna array. The values of the amplitude to excite the antenna elements on the basis of the genetic algorithm are obtained.
статья, добавлен 24.06.2016A novel RLS beamforming algorithm with low complexity and high accuracy for applying in mobile communications smart antenna array processor is presented. Determination of the speed of the proposed conveyor architecture compared with the usual structure.
статья, добавлен 04.11.2018The boundary problem for eigenmodes in coaxial quad-ridged waveguides has been solved by the transverse field-matching technique. The formulas obtained provide possibilities to calculate cutoff wave numbers and electric and magnetic fields modes.
статья, добавлен 07.12.2016Description wireless near field as trends in the development of applications for mobile devices. Features use of wireless communication for electronic payments, communication between the communication. Device communication and "smart" marketing posters.
статья, добавлен 27.09.2016Method of forming the sensitive elements of sensors magnetic field as a spinvalve type multilayer structures based on Co and Cu. The study their magnetoresistive properties. Calculation of the magnetic sensitivity of the samples with a fixed thickness.
статья, добавлен 30.07.2016Radar Range Equation and Cross Section. Circular Polarization Components. Vector Effective Height. Mutual Coupling Between Antennas. Radiation Structures and Numerical Methods. Aperture Distributions and Array Synthesis. Dipoles, Slots and Loops.
книга, добавлен 25.11.2013The path and loss - the dominant feature of the propagation environment. Operating frequency, antenna array size - one of the parameters, that plays a significant influence on overall system performance of the next generation wireless communications.
статья, добавлен 17.03.2022Current-voltage characteristics of semiconductor ultrahigh frequency diode. The detection of an electromagnetic field and measurement of its density. The equivalent scheme of the ultrahigh frequency semiconductor diode. Microwave diode, linear regression.
статья, добавлен 27.07.2016Familiarization with the concept of field-effect transistors. Laying out circuit boards and mounting RF devices. Classes of operation, forms of modulation, biasing, and operating in a pulse mode. The basic factors affecting low power amplifier design.
учебное пособие, добавлен 25.11.2013- 13. Smart antenna application for satellite communication systems with space division multiple access
Two different beamforming approaches in space division multiple access for mobile satellite communications: switched-beam antennas and adaptive array antenna systems are considered. The hardware implementation of adaptive algorithm is considered as well.
статья, добавлен 04.11.2018 Identification of the main means used in online communications for the organization of polite communication. Features of politeness in the little-studied field of Russian-language online communication. Prohibitions on certain forms of speech behavior.
статья, добавлен 11.03.2021The role of a new profession in aviation is a personal data protection officer. Teaching the course "Prevention of criminal offenses in the field of computer aviation security" for future masters of NAU in the specialty 262 "Law enforcement activities".
статья, добавлен 10.06.2023US National Cybersecurity Strategy. A study of the positive practice of ensuring US cybersecurity in the context of its possible implementation in Ukraine. Creating a talent pool, increasing the potential of specialists in the field of cyber defense.
статья, добавлен 21.03.2020Comprehensive study of methodological prerequisites and regularities of complex modeling of innovative communication in the field of obtaining new knowledge in digital discourse. Ontological nature of lexical innovations of globalized languages.
статья, добавлен 25.01.2023The essence of conservative deterministic methods of determining interference. Electromagnetic compatibility of mobile services. The levels of the interference field strength at the receiver. Building a stochastic model of functioning of a station.
статья, добавлен 26.03.2016- 19. Study of transmission lines effect on the system operationon of continuous automatic cab signalling
Investigation of the influence of the electromagnetic field of high-voltage power transmission lines on railway chains and continuous automatic cockpit signaling. Development of methods for increasing the noise immunity of the automatic control system.
статья, добавлен 29.09.2016 Chaos-geometric and quantum-dynamic approach that consistently includes a number of quantum models and a improved methods of analysis to solve problems quantitatively complete modeling and analysis of chaotic dynamics of nonlinear processes in atomic.
статья, добавлен 13.01.2017The article is devoted to the researches the accuracy of the measurement of range by the multifrequency phase method. The sources of error of probing signals are identified: instability of frequency probing signal, error of measurement amplitude.
статья, добавлен 27.07.2016Corresponding boundary problem determines electromagnetic wave propagation in the isotropic homogeneous finite lines under expofunctional excitations and arbitrary large time intervals. Investigating electromagnetic field behavior for arbitrary media.
статья, добавлен 30.07.2016A method of in-situ calibrating 3D magnetic sensors based on Hall devices that have linear field characteristics and are non-orthogonal, with known position of each Hall device in relation to the 3D sensor’s substrate. The method’s efficiency is proved.
статья, добавлен 20.01.2017Research of efficiency of a ultrasonic transducer for excitation longitudinal and shear waves on base of yttrium iron garnet thin films. Study of value and the direction of an external magnetic field, geometric sizes of a films, and ultrasound frequency.
статья, добавлен 17.01.2016Comparison of ship data obtained in the experiments NEWFOUEX-88 and ATLANTEX-90. Data of simultaneous measurements of the brightness temperature of the natural microwave radiation of the ocean and atmosphere obtained using an SSM / I scanning radiometer.
статья, добавлен 30.10.2018