Man-Made Plasmas and Some Applications. Early practical examples of the technology used to contain the plasma and are referred to as ionized gas plasma antennas. The device includes a gas filled tube; a voltage source for developing an electrically conductive path along a length of the tube corresponding to a resonant wavelength multiple of the predetermined radio frequency; and a signal transmission source coupled to the tube for supplying a radio frequency signal to the conductive path for antenna transmission. Plasma Antenna Windowing Foundation of the Smart Plasma Antenna Design. A comprehensive guide to the latest in phased array antenna analysis and design--the Floquet modal based approach. Due to the close proximity of the various metallic antennas, electromagnetic coupling is a problem that may affect broadcasting antenna patterns, reception antenna patterns, and antenna gains.
Effect of Polarization on Plasma Tubes in the Smart Plasma Antenna. Aperture and patch radiation patterns coupled with Floquet's Theorem are combined to yield a Green's function of scattered electromagnetic radiation, and will be presented to predict filtering and modal content. Ionized gas plasma antennas can be turned on and off and are good for stealth and resistance to electronic warfare and cyber attacks. This title provides an understanding of the efficient design and prototype development of plasma antennas. Much of the analysis for lower frequencies can be carried over to the infrared because of the fact that Maxwell's equations scale with the ratio of a linear dimension of the scattering structure to the wavelength. Current Work Done to Make Plasma Antennas Rugged. The generated fields can be either uniform or gradient, in order to subject the test article to realistic conditions.
Experiments of Scattering Off of a Plasma Cylinder. The antenna system of claim 2 further comprising one or more electro-optic modulators for modulating light signals produced by said one or more lasers. A method for controlling a plasma antenna system to avoid interference between a plurality of plasma antennas in close proximity to each other, said method comprising: operating one of the plasma antennas such that the one plasma antenna has a first plasma antenna resonant frequency; and controlling adjacent plasma antennas such that adjacent plasma antennas are effectively electrically invisible to the one plasma antenna. Introduction; Plasma Physics for Plasma Antennas - Mathematical Models of Plasma Physics. Satellite Plasma Antenna Concepts and Design.
Thermal Noise in Plasma Antennas. Incident Signal on a Cylindrical Plasma. Alternatively the plasma can be used as a or a to guide and focus radio waves from another source. Commercial Smart Plasma Antenna Prototype. Applications of the Smart Plasma Antenna.
Теория и конструирование фазированных антенных решеток. The system of claim 6 wherein said optical driver is operable for driving said one or more plasma antennas at a frequency within a range of about plus or minus twenty percent of a resonant frequency of said one or more plasma antennas. A method for transmitting a short pulse signal without a trailing residual signal is also provided. The antenna system of claim 9 wherein said one or more plasma antennas have a rectangular profile. Governing Plasma Fluid Equations for Applications to Plasma Antennas.
The wavenumber frequency spectral density of pressure fluctuations resulting from the continuous and discrete waves has not been investigated up to the present time. The disadvantage is that the plasma antennas require energy to be ionized. Generation of Dense Plasmas at Low Average Power Input by Power Pulsing: An Energy-Efficient Technique to Obtain High-Frequency Plasma Antennas. Plasma Antenna Windowing: Foundation of the Smart Plasma Antenna Design. The electronic scan antenna of the present invention also includes a control circuit for selectively ionizing the gas containing areas such that the size of each ionized plasma area may be dynamically varied so as to dynamically vary the imparted phase shift. Net Radiated Power from a Center-Fed Dipole Plasma Antenna.
Ionized gas plasma antennas can be nested such that the higher frequency plasma antennas are placed inside lower frequency plasma antennas. Reconfigurable Impedance of a Plasma Antenna. The primary objective of the investigation is to develop a mathematical model of the magnetic, magnetizing, electric, and displacement fields as they exist in the presence of the cylindrical shell. A method for a plasma antenna, comprising: controlling a resonant frequency of said plasma antenna; and driving said plasma antenna with a radio signal of the same frequency as said resonant frequency of said plasma antenna within a range of about plus or minus twenty percent. Various checks were made of eigenfunctions and eigenvalues of the homogeneous case against other theoretical results with close agreement.
As well, one or more flexible, shapeable, expandable, contractible or pliable plasma containers may be utilized for containing the plasmas for the one or more plasma antennas. The hydrodynamic waves leading to pressure fluctuations in a turbulent boundary layer are generated as a result of the bursting process. Thus, the present invention contemplates hybrid systems which may include more typical antenna systems. Basic Plasma Density and Plasma Frequency Measurements. The antenna system of claim 8, wherein said first optical fiber is connected at a first position on each of said one or more plasma antennas and said second optical fiber is connected at a second position on each of said one or more plasma antennas, said first position being spaced apart with respect to said second position. This unique resource provides you with a solid understanding of the efficient design and prototype development of plasma antennas, helping you to meet the challenge of reducing the power required to ionize the gas at various plasma densities. Ruggedization and Mechanical Robustness of Plasma Antennas.
Fabry-Perot Resonator for Faster Operation of the Smart Plasma Antenna. Received signals may, if desired, be picked up by electrical wire 56, amplified by preamp 58, and used to produce a modulated laser signal in optical fiber 62. In another embodiment a plurality of closely spaced plasma antennas are operated with different plasma resonant frequencies such that one plasma antenna is electrically invisible with respect to another plasma antenna. The method of claim 13 wherein said second plasma antenna is turned off such that said second plasma container temporarily does not contain a plasma. Although plasma antennas have only become practical in recent years, the idea is not new; a patent for an antenna using the concept was granted to J. Early Design and Experimental Work for the Smart Plasma Antenna.
Plasma Antenna Nesting, Stacking Plasma Antenna Arrays, and Reduction of Cosite Interference. Additionally, the book presents experimental work in the this cutting-edge area and reveals the latest developments in the field. The method of claim 13 further comprising operating said adjacent plasma antennas such that each adjacent plasma antenna has a second plasma antenna resonant frequency, said second plasma antenna resonant frequency being different from said first plasma antenna resonant frequency. The book gently introduces the reader to plasma antennas and the underlying physics behind their operation. Conclusions on the Plasma Reflector Antenna. Each ionized plasma area is disposed a first distance from the ground plane, a second distance from adjacent ionized plasma areas and each plasma ionized plasma area has a particular size associated therewith.