Sep 25, 2015 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. Plasma antenna uses the ionized gas as a conductive medium as a. Throughout this thesis, theory of interaction of electromagnetic waves with plasmas. The plasma antenna can be made to appear and disappear in. The plasma antenna is investigated for the first time. The pulsing electric field stimulates the helium atoms into a plasma state. At least one pair of adjacent enclosures in the array is arranged such that. Assume that a linear plasma antenna produces a dipole field as described and has a typical dipole gain of 2. Fabrication of an inductively coupled plasma antenna in low. Whenever the plasma column is deionized then gas has large resistance which tends to infinite and does not interact with rf radiations 4. One fundamental distinguishing feature of a plasma antenna is that the gas ionizing process. Plasma antenna works when a contained gas is ionized into plasma state and become electrically conductive so that it responds strongly to magnetic fields and can be used as an antenna when rf is supplied 2 3. In order to verify this theory, the whole process of electromagnetic wave propagating in.
Montgomery and tidman3 used a perturbation scheme to develop a set of coupled. Characterization of inductively coupled plasma generated. A plasma antenna is a column of ionized gas in which the free electrons emit, absorb and reflect radio signals just as the free electrons in a metal antenna. When supply is given to the tube, the gas inside it gets ionized to plasma. Reconfigurable microwave semiconductor plasma antenna. Reconfigurable plasma antenna array by using fluorescent tube. Referring to figure 2, a typical wire dipole will have a length of 141. Electrons and ions are produced in the gas phase when electrons or photons with suf. Low power planar antenna inductive discharge ion source. Pdf a study of plasma antenna parameters with different. These are radio frequency antennas that employ plasma as the guiding medium for electromagnetic radiation. The plasma parameters were determined using the data obtained.
Each microdischarge acts alone or in concert with other microdischarges to form a dipole or. Plasma antenna, plasma frequency, ionized gas, metal antenna. Apr 17, 2015 plasma antenna plasma antennas are radio frequency antennas that employ plasma as the guiding medium for electromagnetic radiations. Features of plasma antenna gas ionization process of the plasma antenna is resistance control which is the fundamental feature of the plasma antenna. A selected portion of each plasma tube acts alone or in concert with a selected. M ethods of exciting and confining plasmas are discussed, and the current state of the art in.
Moreover, the electron density of the plasma is also nearly constant in entire length of the plasma column. This study summarizes the essential theory behind the operation of plasma. The fundamental base of plasma antenna is the use of an ionized medium as a. Research on radiation characteristic of plasma antenna through. Characterization of a surface wave driven plasma monopole antenna. Plasma density and plasma conductivity change the plasma frequency so it is possible to retune the same plasma antenna for different frequency. In this paper we have discussed the basic theory, operation of the plasma antenna. A plasma antenna includes a plasma column formed of an ionizable gas. The key advantages of plasma antennas are that they are highly reconfigurable and can be turned on and off. Ionized gas plasma antennas can be turned on and off and are good for stealth and resistance to electronic warfare and cyber attacks.
A modulating carrier frequency produces hertzian dipoles within the plasma that radiate rf energy at the modulating carrier. The antenna, which produces these dipoles, can be short and still produce significant gain when the modulating carrier frequency and the natural. Plasma antennas use partially or fully ionized gas as the conducting medium. Currently, the operating elf antenna is the horizontal electric dipole hed antenna.
The plasma acts as an isotropic nonpolarized antenna emitting a. When gas is electrically charged or ionized to plasma, it becomes conductive and allowing radio frequency signals to be. There are various ways to supply the necessary energy for plasma generation to a neutral gas. Plasma or ionized volume, simply replaces a solid conductors. Plasma antennas 4 employ ionized gas enclosed in a tube as the conducting element of an antenna. As an alternative to metallic antennas with controlled conductivity, as well as the ability of instantaneous disappearance, gas plasma antennas have been. In gas plasma antenna, the concept is to use plasma discharge tubes as the. In this paper, a gas plasma antenna fed by a single electrode is considered.
Gas ionization process of the plasma antenna is resistance control which is the fundamental feature of the plasma antenna. Pdf basic features of plasma antennas for applications. The antenna comprises a plasma display panel pdp containing a multiplicity of plasma tubes, each plasma tube containing a gas, which is ionized to produce electron density. The antenna comprises a gas discharge device containing a multiplicity of microcavities, each microcavity containing an ionizable gas for providing a microdischarge. Pdf we have demonstrated that one or two plasma tubes can be used to focus. There was remaining consistently confusion over the better gas for plasma. Us6806833b2 confined plasma resonance antenna and plasma. Plasma antenna international journal of engineering research. When the gas is not ionized, the antenna element ceases to exist.
Apr 12, 2018 plasma antenna is a special type of antenna in which the metal conducting elements of a conventional antenna are replaced by plasma. A plasma antenna is a type of antenna in which the metalconducting elements of a conventional antenna are replaced by plasma. The plasma antenna can be made to appear and disappear in milliseconds. Plasma antenna technology employs ionized gas enclosed in a tube or other enclosure as the conducting element of an antenna. Plasma antennas refer to several antenna concepts that use some ionized medium. Fabrication of an inductively coupled plasma antenna in. It employs an ionized gas enclosed in a tube as the conducting element of antenna. Characterization of inductively coupled plasma generated by a. Identified by sir william crookes, an english physicist in 1879.
Also, dc biased plasma antenna has been studied, and it is found that the gain of a plasma antenna which consists of arhg vapour is particularly high at high frequency 4. Plasma antennas provide similar advantages as conventional antennas but at a fraction of the cost, together with much wider bandwidth of operation. Pdf the results of researches internal and external microwave characteristics of loop and rod antennas on the basis of cold plasma are presented. The advantages of plasma antennas are that they are highly reconfigurable and can. Ioionized gnized gaaseses are much mos are much more ere efficifficienent t thathan n solid solid conductconductorsors whenwhen energized it will transmit and receive rf signals whenwhen deionizionized ed gagaseses has gos has got int infinfinite resite resistance istance for for rf rf sisignals thus thus its aits a nenew aw antennntennaa solution tsolution thathat. This is a fundamental change from traditional antenna design that generally employs solid metal wires as the conducting element. The study explores the advantages of a transmitting elf plasma antenna for submarine applications and draws comparisons between this antenna and those currently in use. Comparative analysis of plasma antenna with metal antenna. Plasma antennas are reconfigurable, stealthy and resistant to jamming and emp electromagnetic pulse weapons. It must be noted that most of the researches on plasma antenna parameters had done on the basic form of plasma antenna plasma column 1415 16 1718. Plasma antenna can appearappear and and disdisappearappearin a fein a few w millionths millionths of aof a sesecondcond leaving b leaving behehind tind thehe gagas s fillefilled d column column thathat ht haas s littlittlele effe effect ct on ton thehe ele electrctromaomagnetic fieldsgnetic fields. A gas plasma antenna with a rigid, flexible or semiflexible substrate and an improved method of generating a uniform electron density. It was shown that the inductively coupled discharge with a quadruple antenna produces rather uniform cylindrical plasma with a length of.
An icp antenna generates a plasma by coupling radio frequency rf waves generated by a. Study of array plasma antenna parameters aip publishing. Plasma antenna is a general term which represents the use of ionized gas as a conducting medium instead of a metal. Pdf basic features of plasma antennas for applications in. Pdf several experiments on plasma antennas are investigated till date. A second fundamental distinguishing feature is that after sending a pulse the plasma antenna can be deionized. Other than that, an analysis of monopole plasma antenna using different number of turns of coupling sleeve was presented in 20. Plasma antennas refer to a wide variety of antenna concepts that incorporate some use of an ionized medium. Logicalvideosdotorgplasma antennaplasma antenna, plasma antenna ppt, plasma antenna pdf, antenna, plasma antennas, plasma antenna technolo. Physical characteristics of plasma antennas university of canberra. Plasma antenna is a general term which represents the use of ionized gas as a. Design and fabrication of plasma array antenna with beam forming.
As the composition of gas, radius, and pressure of plasma antenna can not be changed if the plasma antenna has been produced and these parameters. Each plasma shell acts alone or in concert with other plasma shells to form a. A reconfigurable antenna comprises an array of interconnected gas enclosures, each of the enclosures being controllable between at least a first state in which gas within the enclosure is substantially nonconducting and a second state in which the gas within the enclosure forms an electrically conductive plasma. Plasma antennas use partially or fully ionized gas as the conducting medium instead of metal to create an antenna. Experiments and theory were performed regarding both the plasma and the.
This paper comprises the discussion of basic theory, operations of plasma antenna, features, advantages etc. Plasma antennas seminar report, ppt, pdf for ece students. When supply is given to the tube, the gas inside it gets ionized. Plasma antenna windowing reflector for frequencies smaller than the plasma the plasma antenna windowing consists in a rf frequency. Reconfigurable characteristics of the monopole plasma antenna. Plasma antenna usually adopts the partially or fully ionized gas as. Plasma antenna is a type of antenna in which the metal conducting elements of a conventional antenna are replaced by plasma.
In contrast, the rfexcited plasma source proposed here utilizes a spiral stovetop. Pdf a study of plasma antenna parameters with different gases. Pdf research of antennas made gas plasma on microwave band. 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. A study of plasma antenna parameters with different gases. In this work we report results from theoretical modeling of miniature plasma antenna at low gas pressure working at a frequency of 2. Three promising designs are discussed, and mathematical models used in this study are presented. Download plasma antenna seminar reports, abstract, pdf, ppt.
Pdf measurement of the properties of a plasma column. Analysis of plasma dipole antenna using equivalent circuit. Reconfigurable characteristics of the monopole plasma. Pdf measurement of the properties of a plasma column used. After the gas is ionized, the plasma antenna has virtually no noise floor. 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. While in operation, a plasma antenna with a low ionization level can be decoupled from an adjacent highfrequency transmitter. Plasma antennas are mainly constructed using an insulating tube filled with low pressure gases. Plasma silicon antenna plasma physics antenna radio. A circular scan can be performed electronically with no moving parts at a higher speed than traditional mechanical antenna structures.
Plasma antenna plasma physics antenna radio free 30. The tunable highpower plasma switches and antennas are expected to be applicable for nonmilitary applications such as cell phone towers. This study summarizes the basic theory behind the operation of plasma antennas based on a survey of patents and technical publications. The antenna, which produces these dipoles, can be short and still produce significant gain when the modulating carrier frequency and the natural resonance frequency of the plasma are substantially equal.
A gas plasma antenna with a rigid, flexible, or semiflexible substrate and an improved method of generating a uniform electron density. Gas plasma antenna referred to as plasma antennas solid state plasma antenna also called as psian gas plasma antenna it consists of ionized gas enclosed in a discharge tube. Analysis of plasma dipole antenna using equivalent circuit model. Plasma antenna employs ionized gas enclosed in a tube as the conducting element of an antenna. The antenna comprises a plasma display panel pdp containing a multiplicity of plasma shells, each plasma shell containing a gas which is ionized to produce electron density. When a plasma antenna is turned off the gas is not ionized, it becomes transparent and allowing other adjacent antennas to transmit or receive without interference 4. This configuration has been used in plasma processing applications to generate highdensity, large area, uniform.
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