Antenna Radiation Properties in Presence of Anisotropic Plasmas

Bachynski, M. P.; Gibbs, B. W.

doi:10.1002/rds196839920

Cited by 3 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pattern distortion due to an anisotropic plasma sheath surrounding an antenna has been studied by many workers [Hodara and Cohn, 1962;Hodara, 1963;Shore and Meltz, 1962;Chen and Cheng, 1965;Meltz and Shore, 1965;Bachyanski and Gibbs, 1968]. Samaddar [ 1963] has suggested the feasibility of an anisotropic plasma column as an electronic scanning system.…”

Section: Introductionmentioning

confidence: 99%

A narrow beam antenna system using an air column having a central conductor and surrounded by an anisotropic plasma column

Joshi¹,

Verma²

1975

Radio Science

View full text Add to dashboard Cite

The radiation pattern of a magnetic ring source of electromagnetic waves in an air column having a central conductor along its axis and surrounded by an annular axially magnetized plasma column is studied. This configuration gives rise to a radiation peak or peaks near, before, or beyond the critical angle depending upon the value of the magnetic field. The direction of the radiation peak depends upon the inner and outer diameters of the annular plasma column, the diameter of the central conductor, the plasma density, and the magnetic field. The direction of the radiation peak is independent of the diameter of the ring source. For very high magnetic fields the peak shifts toward the end fire direction. Based upon these results it is proposed to develop an electronically scannable narrow beam plasma antenna system.

show abstract

Section: Introductionmentioning

confidence: 99%

A narrow beam antenna system using an air column having a central conductor and surrounded by an anisotropic plasma column

Joshi¹,

Verma²

1975

Radio Science

View full text Add to dashboard Cite

show abstract

Reply to Comments by G. F. Brand

Bachynski¹

1970

The Physics of Fluids

View full text Add to dashboard Cite

Antenna pattern distortion by an isotropic plasma slab

Bachynski¹,

Gibbs²

1968

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

in the direction of sheath motion) of the reflected wave and of the wave in the moving medium are first found. From the longitudinal components all other field components are determined for an arbitrary orientation of the plane of incidence and an arbitrary angle of incidence. Several special cases are solved completely for both an incident E-wave and an incident H-wave. It is found that the results are particularly simple when the moving sheath is a uniaxial magnetoplasma. REFERENCE[l] C. T. Tai, "Electrodynamics of moving anisotropic media: The fist-order theory,"[5] S . W. Lee and Y. T. Lo, "Reflection and transmission of electromagnetic waves by a moving uniaxially anisotropic medium," J. , "On waves in an anisotropic plasma imbedded in a moving dielectric medium," , "On guided waves in moving anisotropic media," IEEE Trans. Microwave Theory and Techniques, vol. MTT-16, pp. 99-103, February 1968.[8] -, "Wave behavior at an interface of a semi-infinite moving anisotropic medium,"Abslract-A quantitative laboratory experimental investigation has been conducted on the distortion of the main far-field radiation pattern of a horn antenna situated behind a layer of isotropic plasma. The power radiation pattern and phase for orthogonal components of the radiation transmitted through the plasma were investigated for various plasma properties.The experimental results were compared to theory based on the reciprocity theorem and good agreement was obtained. The major features are a gradual attenuation and distortion of the radiation pattern for plasma electron densities below the critical density and a rapid change in the radiation pattern with severe attenuation in the region of the critical electron density followed by "cut-off"at still larger electron densities. No appreciable polarization change of the energy radiated by the antenna is introduced by the plasma.

show abstract

Antenna Radiation Properties in Presence of Anisotropic Plasmas

Cited by 3 publications

References 9 publications

A narrow beam antenna system using an air column having a central conductor and surrounded by an anisotropic plasma column

A narrow beam antenna system using an air column having a central conductor and surrounded by an anisotropic plasma column

Reply to Comments by G. F. Brand

Antenna pattern distortion by an isotropic plasma slab

Contact Info

Product

Resources

About