The plasma antenna is comprised of a an enclosed chamber. Design and fabrication of plasma array antenna with beam forming. Plasma antenna, plasma frequency, ionized gas, metal antenna. The plasma device includes devices with a plasma that is responsive to electromagnetic radiation andor electrical signals. By using a vector network analyzer it is shown that the persistence of plasma developed inside the tube persists for longer. The reflectarray reflection coefficient phase variation is achieved by varying the plasma frequency.
Hardwired antennas can be detected by their shadows and reflections in the rf bands. Elf plasma antenna concept the elf plasma antenna concept uses as a current carrier an ionized column of air, created by one or more lasers, with a length on the order of the vertical electric dipole with or without corona elf antenna. Artech house antennas and propagation library, 2011. When the plasma antenna is turned off, it stops existing. Although plasma antennas have only become practical in recent years when. This prototype plasma antenna is stealthy, versatile, and. A plasma antenna is a column of ionized gas in which the free electrons emit, absorb and reflect radio. Plasma antennas are radio recurrence reception apparatuses that utilize plasma as the controlling medium for electromagnetic radiation. Plasma or ionized volume, simply replaces a solid conductors. Aceit conference proceeding 2016 comparative study of. In this study, designing procedure of a monopole plasma antenna excited by microwave surface waves was investigated. When the antenna is off, the plasma is nonconducting and therefore the tube is transparent.
Anderson, plasma antennas, artech house, london, 2011. Igor alexeff inventions, patents and patent applications. This presentation summarizes an extensive program on plasma antennas. The paper analyzes the motion of electron in plasma antenna and the distribution of electromagnetic field power around the plasma antenna, and proposes a selfconsistent model according to the structure of cylindrical monopole plasma antenna excited by surface wave. Pradeep give a summary of an extensive research program on plasma antennas. Through using fdtd method, we study the propagation of electromagnetic wave in free space in stretched coordinate. This study summarizes the basic theory behind the operation of plasma antennas based on a survey of patents and technical publications. Research on radiation characteristic of plasma antenna. Plasma antennas refer to a wide variety of antenna concepts that incorporate some.
Pdf a plasma antenna was constructed using a commercially available fluorescent tube with length. Plasma antenna shielding esmaeil farshi, igor alexeff. Plasma antennas driven by 520 khz ac power supply jiansen zhao, yuli chen, yang sun, huafeng wu, yue liu, and qiumeng yuan citation. Alexeff a new antenna made of plasma a gas heated to the point that the electrons are ripped free of. A kind of wideband plasma monopole antenna is proposed, such as circular plasma monopole antenna based on circular monopole theory. We have demonstrated transmission and reception of operating plasma antennas over a wide frequency range 500 mhz20 ghz.
The experiments described in this work were performed with the aim of introducing a new plasma antenna that was excited by a 520 khz alternating current ac power supply, where the antenna was transformed into a ushape. Theory, measurements, and prototypes of plasma antennas. Collaboration a method and calculation have been developed to protect space based antennas using plasma fre. Igor alexeff, ted anderson, and et al, experimental and theoretical results with plasma antenna, ieee trans. The key advantages of plasma antennas are that they are highly reconfigurable and can be turned on and off. The vertical length can be 12,500 ft, as it was for the vertical. Perfomance analysis of the loopshaped plasma antenna under.
Published on apr 30, 20 a plasma antenna designed by dr. Phase shifting plasma electromagnetic waveguides and plasma electromagnetic coaxial waveguides, as well as plasma waveguide horn antennas, each of which can be reconfigurable, durable, stealth, and flexible are disclosed. A selfconsistent model on cylindrical monopole plasma. New radio antenna made of star material military could use plasma devices that could better conceal signals. The radiation characteristic of plasma antenna is investigated by using the finitedifference timedomain fdtd approach in this paper. A gaseous plasma antenna array paa is an aggregate of plasma discharges and possibly conventional metallic radiating elements, and it constitutes a promising alternative to metallic antennas for applications in which fast reconfiguration of radiation pattern, and gain is desired. In various configurations, the plasma device has a plasma in which the temperature, resistance, pressure, andor collision frequency are at a. Plasma antenna shielding esmaeil farshi, igor alexeff, ted anderson, university of tennessee, haleakala research and development, inc. A plasma device having low thermal noise, which results in a high signaltonoise ratio snr of the plasma device. In the experiments the supply frequency varies from 25hz to 200hz.
Plasma antennas refer to a wide variety of antenna concepts that incorporate some use of an ionized medium. This prototype plasma antenna is stealthy, versatile, and jamresistant. In the construction, the needed power supply to the fluorescent tube is controlled by an ic 555 timer. Additionally, unless they are hardened against it, extreme rf energy, as might be generated by an emp or by a highlydirectional attacking antenna, can damage circuits connected to the receiving antenna. The results show that the impedance, voltage standingwave ratio vswr, radiation pattern and gain characteristics of the antenna can be controlled rapidly by varying not. Stealth antenna made of gas, impervious to jamming. The plasma is rapidly created and vanished by applying proper dc voltages. Optionally, an energy modifying medium to reconfigure the waveguide such that electromagnetic waves of various wavelengths or speeds can be propagated directionally along the.
The impedance and radiation characteristics of this antenna are simulated. A plasma antenna is a type of radio pdftk input output antenna currently in development in which plasma is used instead of the metal elements of a traditional antenna. Plasma antennas use partially or fully ionized gas as the conducting medium instead of metal to create an antenna. Stealthy, versatile, and jam resistant antennas made of gas. Pdf potentiality and performance of plasma antenna made from. Pdf a study of plasma antenna parameters with different gases. M ethods of exciting and confining plasmas are discussed, and the current state of the art in. Igor alexeff, ted anderson, sriram parames waran, and eric p. The advantages of plasma antennas are that they are highly reconfigurable and can be turned on and off. Plasma antenna employs ionized gas enclosed in a tube as the conducting element of an antenna. An operating intelligent plasma antenna we have used a ring of plasma tubes operating beyond microwave cutoff surrounding a metal transmitting. The plasma antenna is an emerging technology that partially or fully utilizes ionized gas as the conducting medium instead of metal to create an antenna. Perfomance analysis of the loopshaped plasma antenna. The possibility of applying a cylindrical isotropic collisionless plasma column with a thin dielectric shell as an antenna of strictly axial radiation is investigated.
The antenna can comprise an enclosed composition capable of forming plasma operable as an antenna. Industrial plasma antennas1 igor alexeff, university of tennessee this presentation summarizes an extensive program on plasma antennas. Patents assigned to asi technology corporation justia. The disadvantage is that the plasma antennas require energy to be ionized. They have found that plasma antennas are just as effective as metal antennas. It is assumed that the phase velocity of radiated waves approaches the velocity of light and the radiated wavelength substantially exceeds the radius of the antenna. And the iterative equations of maxwell equation are derived. Research on plasma monopole antenna and its wideband. Plasma antennas are constructed by an insulating tube filled with low pressure gases. Plasma antennas pdf igor alexeff and ted anderson g.
Pdf several experiments on plasma antennas are investigated till date. Alexeff and anderson and 12 anderson and alexeff 3 have done theory, experiments, and have built prototype plasma. Design and fabrication of plasma array antenna with beam. Plasma antennasplasma antennas igor alexeff and ted anderson university of tennessee haleakala research and development inc. Plasma antennas are just as effective as metal antennas. This paper investigates the design of four different configurations of plasma reflectarrays. When deenergized, the plasma antenna reverts to a dielectric tube that has a. Alexeff and anderson and 12 anderson and alexeff 3 have done theory, experiments, and have built prototype plasma antennas. The present invention is drawn toward a plasma antenna that is preferably reconfigurable, methods of generating plasma antennas, and a method of reconfiguring the radiation pattern of a plasma antenna. Plasma antenna plasma antennas are radio frequency antennas that employ plasma as the guiding medium for electromagnetic radiations. Plasma antenna prototype for amfm radio page 85 plasma reflector antenna and prototype page 87.
Here, plasma release tubes are utilized as the reception apparatus components. Design, simulation and implementation of a preionized. Industrial plasma antennas1 american physical society. Anderson 4 wrote a comprehensive book on plasma antennas. Theodore anderson is demonstrated by igor alexeff and dr. A plasma array with a controlled pattern is created with the help of a discharge creeping over a dielectric surface. Alexeff amplitude anderson applications beam beamwidth cavity resonances chapter. The present paper is a work on fluorescent tube performing the function of a monopole plasma antenna. Beamforming capabilities of a plasma circular reflector. Igor alexeff, ted anderson and their group have published several great works in designing plasma using antenna such as smart plasma antenna in 1 and 8. The antenna design being presented at next weeks aps division of plasma physics meeting in orlando consists of gasfilled tubes reminiscent of neon bulbs. Experimental and theoretical investigation on plasma antennas e.
A plasma antenna can be used for both transmission and reception. Hence, the reconfigurability of the antenna is superior. The results provide insight into different radiation characteristics of plasma reflectarrays. A plasma antenna is a type of radio antenna currently in development in which plasma is used instead of the metal elements of a traditional antenna. The proposed unit cell consists of a cubic glass box filled with argon gas energized with applied ac voltage. In order to validate the correctness of this method, we simulate the process of. The study reveals the advantages of a plasma antenna over the conventional antenna in the sense that different antennas can be formed by tuning the operating parameters. The surprising results were that the efficiencies are comparable to a copper wire antenna of the same configuration. Igor alexeff, fellow, ieee, ted anderson, sriram parameswaran, eric p. Proceedings of the 20 international symposium on electromagnetic theory. The results show that the band width with return loss below10db of the circular plasma monopole antenna can get 123%. New radio antenna made of star material technology. Radiation patterns of azimuthally symmetric and azimuthally.
The scattering microwave radiation pattern is calculated for the vertical and horizontal polarizations of the radiation incident on the plasma array. In this paper, a new plasma antenna of beamforming is investigated based upon the interaction of plasma elements due to the electromagnetic wave. The present invention is drawn to an antenna having a reconfigurable length, and a method of reconfiguring an antenna. Experimental and theoretical results with plasma antennas.
Stealthy, versatile, and jam resistant antennas made of gas this prototype plasma antenna is stealthy, versatile, and jamresistant. The functional antenna in term of return loss has return loss. Sakai 5 et al have shown that a plasma antenna is a type of metamaterial. In addition, they can transmit, receive and reflect lower frequency signals while being transparent to higher frequency signals.
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