Last edited by Kekus
Tuesday, October 20, 2020 | History

3 edition of Reconfigurable array of radiating elements (RARE) controlled by light found in the catalog.

Reconfigurable array of radiating elements (RARE) controlled by light

Reconfigurable array of radiating elements (RARE) controlled by light

interim technical progress report, reporting period 01/14/94 to 04/14/94

  • 22 Want to read
  • 8 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Antenna design.,
  • Electro-optics.,
  • Microstrip antennas.,
  • Microstrip transmission lines.,
  • Microwave antennas.,
  • Optical control.,
  • Silicon.

  • Edition Notes

    StatementLev Sadovnik, principal investigator.
    SeriesNASA contractor report -- NASA CR-195828.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15402018M

    Dual‐polarized antenna radiating element is a critical component in the Multi‐function Phased Array Radar (MPAR). This paper studies the dual‐polarized radiating element based on the EM dipole concept. Two different geometries, i.e., loop approximated as magnetic dipole and a printed electric dipole, are used to form a single dual‐polarized radiating : Ridhwan Khalid Mirza, Yan (Rockee) Zhang, Dusan Zrnic, Richard Doviak. This document gives a view of certain active radiating elements for reconfigurable patch arrays. In literature it could be found different possibilities to obtain feasible reconfigurable antennas, whether placing the active circuitry in the transmission lines or directly over the radiating element. In this paper, the second option is chosen and active radiating elements are analyzed, designed.

    Research Article Optically Controlled Reconfigurable Antenna Array Based on obtained through the use of two radiating elements printed in a low-cost substrate and a dihedral corner re ector. 1. Introduction In this way, the proposed OCRA array can be easily. Conventionally, parabolic reflectors and phased array antennas have been used for the antenna applications. However, in J. Huang proposed microstrip reflectarray as an alternative to the bulky parabolic reflector and expensive phased array antennas [1]. Microstrip reflectarray consists of an array of microstrip patches printed on a.

    A phased array antenna is an array antenna whose single radiators can be fed with different phase shifts. As a result, the common antenna pattern can be steered electronically. The electronic steering is much more flexible and requires less maintenance than the mechanical steering of the antenna. The proposed pattern reconfigurable antenna in this paper can be viewed as the degenerated antenna array shown in Figure 3a. (The whole structure of the reconfigurable antenna can be divided into three parts shown in Figure 3a, i.e., the left part, middle part, and right part. These three parts constitute an antenna array with three : Ke Han, Zhongliang Deng, Xubing Guo.


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Reconfigurable array of radiating elements (RARE) controlled by light Download PDF EPUB FB2

Get this from a library. Reconfigurable array of radiating elements (RARE) controlled by light: interim technical progress report, reporting period 01/14/94 to 04/14/ [Lev Sadovnik; United States.

National Aeronautics and Space Administration.]. In particular, the structure of the manuscript is as follows: in Section 2, we show that, by properly superimposing two different radiating modes of a patch antenna, one of which exhibiting a phase singularity, we can change the location of this singularity and, thus, directly shape or rotate the radiation pattern of the radiating specifically, by varying the excitation amplitude.

A novel reconfigurable radiating plasma antenna array based on Yagi antenna technology. of a Reconfigurable array of radiating elements book plasma antenna array by altering the input ionizing power and turning on certain antenna array elements. In a reconfigurable patch array antenna surrounded by plasma tubes has been presented, Cited by: 1.

In [3], a pattern reconfigurable microstrip parasitic array antenna was designed, the antenna had three radiating elements. The main patch is placed midway between the other two elements that.

@article{osti_, title = {Study of the characteristics of reconfigurable plasma antenna array}, author = {Alias, Nur Salihah and Dagang, Ahmad Nazri and Ali, Mohd Tarmizi}, abstractNote = {This paper presents a design and simulation of a reconfigurable array of plasma antenna.

The plasma column is used as radiating elements instead of metal to create an antenna. Author by: Jafar Shaker Languange: en Publisher by: Artech House Format Available: PDF, ePub, Mobi Total Read: 59 Total Download: File Size: 51,7 Mb Description: Reflectarray antennas refer to the class of radiating structures that are comprised of an array of radiating elements, re-radiating the energy that is impinged on them from one or more radiating feeds that are located in.

The final array element exhibits insertion losses of around dB with a phase range over •, but the bandwidth was increased from to MHz at the same central frequency.

@article{osti_, title = {A reconfigurable plasma antenna}, author = {Kumar, Rajneesh and Bora, Dhiraj}, abstractNote = {An experiment aimed at investigating the antenna properties of different plasma structures of a plasma column as a reconfigurable plasma antenna, is reported.

A 30 cm long plasma column is excited by surface wave, which acts as a plasma antenna. Chapter 10Reconfigurable Antennas 1 Introduction The concept of reconfigurability suggests the ability of a system to dynamically modify its performance.

We define a reconfigurable antenna (RA), as one which - Selection from Compact Antennas for Wireless Communications and Terminals: Theory and Design [Book]. This work presents the development of optically controlled reconfigurable antenna arrays.

They are based on two patch elements with E-shaped slots, a printed probe, and a photoconductive switch made from an intrinsic silicon die. Numerical simulations and experiments have been shown to be in agreement, and both demonstrate that the frequency response of the antenna arrays can be efficiently Cited by: 9.

Reconfigurable Microstrip Switched Line Phase Shifter: For Beam Steering Applications [Puneet Anand] on *FREE* shipping on qualifying offers. Beam-steering antennas are the ideal solution for a variety of system applications including traffic control. This paper presents a design and simulation of a reconfigurable array of plasma antenna.

The plasma column is used as radiating elements instead of metal to create an antenna. The advantages of the plasma antenna over the conventional antenna are its possible to change the operating parameters, such as the working pressure, input power, radius Author: Nur Salihah Alias, Ahmad Nazri Dagang, Mohd Tarmizi Ali.

This paper presents a design and simulation of a reconfigurable array of plasma antenna. The plasma column is used as radiating elements instead of metal to create an antenna. The advantages of the plasma antenna over the conventional antenna are its possible to change the operating parameters, such as the working pressure, input power, radius of the discharge tube, resonant Author: Nur Salihah Alias, Ahmad Nazri Dagang, Mohd Tarmizi Ali.

3 Electronically Steerable Parasitic Array Introduction. A parasitic array antenna consists of a driven element and several parasitic driven antenna is the only active radiating element, and the RF energy is distributed from the driven element to parasitic elements by electromagnetic coupling.

uninitialized elements of a string array will contain empty strings True even if a array is defined locally if a local array is completely uninitialized, its elements will contain garbage, like all other local variables If you leaves an element unitialized, you must leave all the elements.

A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner. In order to provide a dynamic response, reconfigurable antennas integrate an inner mechanism (such as RF switches, varactors, mechanical actuators or tunable materials) that enable the intentional redistribution of the RF currents over the.

Array Factor - Uniform Spacing, Nonuniform Amplitude Consider an array of isotropic elements positioned symmetrically along the z-axis (total number of elements = P).

The array factor for this array will be determined assuming that all elements are excited with the same current phase (= 0o for simplicity) but nonuniform current Size: KB.

shaped elements. Such a choice allows to achieve a good aperture e–ciency and very low pseudo-grating lobes while using only two difierent kinds of radiating elements. Preliminary results are shown and discussed with reference to both cases wherein the single tiles are not fully populated and wherein ad-hoc sub-array radiators are used.

Applications of Advanced Reconfigurable Antenna for the Next Generation 4G Communication Devices: /ch The objective of this chapter is to show the applications of innovative reconfigurable antenna methodologies for the 4G devices. Microwave antenna technologyAuthor: Massimo Donelli. Reflectarray antennas refer to the class of radiating structures that are comprised of an array of radiating elements, re-radiating the energy that is impinged on them from one or more radiating feeds that are located in free space.

This book begins with introductory material on reflectarray antennas and progresses to the presentation of.

In this paper, experimental data was demonstrated the concepts of reconfigurable number of elements that produced broad beam and narrow beam radiating pattern characteristic.

Using modified WPD in the antenna structure, produced better performance in term of return loss characteristic. This research has taken advantage of the flexibility of the number of element technique by applying it to the.When individual antenna elements are aggregated into arrays of elements, new response/radiation patterns are created which depend upon both the element patterns and the geometry of the array.

These patterns are called beampatterns to reflect the fact that the pattern can be constructed to have a narrow angular distribution, that is, a beam.The present thesis deals with the design of a planar antenna array for the communication between a civil aircraft (Dassault's Falcon) and an Inmarsat satellite.

The final goal is to provide high speed Internet access in X/Ku-Band (GHz / GHz), and possibly even in K/Ka- Band (GHz / GHz). The study starts with the Ku-Band only, then evolves towards the transmission band and Author: Baptiste Fernand Hornecker.