The impedance extension method (IEM) has been proposed so far, as a method for analysis of a huge-scale periodic array antenna for power transmission from space solar power systems (SSPS) to the earth[1][2]. Since the IEM is an approximate method based on active impedance properties of elements in the periodic array antenna[3], the IEM can only be applied to the periodic array antenna. However,...

Abstract-In this paper, a single neuron neural network beamformer is proposed. A perceptron model is designed to optimize the weights of a dipole array antenna to steer the beam to desired directions. The objective is to reduce the complexity by using a single neuron neural network and utilize it for adaptive beamforming in dipole array antennas. The optimized coefficients calculated from the s...

A printed dipole antenna integrated with a duplex RF switch used for mobile base station antenna beam steering is presented. A coplanar waveguide to coplanar strip transition was adopted to feed the printed dipole. A novel RF switch circuit, used to control the RF signal fed to the dipole antenna and placed directly before the dipole, was proposed. Simulated and measured data for the CWP-to-CPS...

A theoretical approach to calculating the dipole moment function of a diatomic molecule at very small internuclear separations has been suggested. The approach is based on the united-atom model and the LS-coupling approximation. Regularities in the behavior of the dipole moments as functions of the internuclear separation, electronic state, and nuclear charge of the molecule have been found. Wi...

EEG is a noninvasive technique useful for the human brain mapping and for the estimation of neural electrical activities in human brain. A goal of processing EEG signals of a subject is the localization of neural current sources in human brain known as dipoles. Although this location estimation problem can be modeled as a particular kind of parameter estimation problem as in array signal proces...

We describe the dipole-dipole interactions between a linear array of optically driven silver metallic nanospheres (MNSs). These model calculations incorporate the full electric field generated by an oscillating dipole and predict several interesting effects due to the retardation of the field. The distribution of the power associated with MNSs along the array shows a strong variation on a scale...

To date, CubeSat radars and imagers have been limited to operations beyond S-band due the challenges associated with design of wideband, compact, low-frequency antennas. Concurrently, frequencies at VHF/UHF bands can image through clouds foliage, are very attractive for ice, water biomass sensing. There is thus a need develop wideband antennas that operate which low cost, light-weight, packable...

Within the context of modern digital phased array (DPA) radios, differential Radio Frequency (RF) front-ends provide much greater immunity to noise and distortion by suppressing second order harmonics. Recent advancements in RF offer high dynamic range, linearity, low transceiver chain. However, a major roadblock fully systems is presence common-mode resonances. In this article, we present nove...

Hertzian dipole radiation from narrow circumferential slots on a conducting circular cylinder is studied. Eigenfunction expansions are used and boundary conditions are enforced to obtain a set of simultaneous equations. A fast convergent series formulation is obtained and numerical results are shown. Our theory provides a viable model for dipole radiation from a circumferential slot array on a ...

Introduction: Guided mode resonance is generated by coupling wave diffractions with the waveguided mode. The guided resonances provide narrow-linewidth and intensity for high quality factor (Q-factor) optical resonators. Methods: we demonstrate high-Q propagating on a low-loss, terahertz guided-mode magnetic system, which are periodic square lattices of U-shaped split ring resonators (SRRs) qua...