An experimental study of electronic scanning by an antenna loaded with a circular array of ferrite rods

Okamoto, Naoya; Ikeda, Shinya

doi:10.1109/tap.1979.1142106

Cited by 19 publications

(3 citation statements)

References 3 publications

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“…As such, only about 50 Oe is needed externally to steer the radiation beam of the antenna array. We note that the beam steering rate calculated in this paper agrees well with the measured values from the scattering of electromagnetic waves by an array of deployed ferrite posts [2]. Further research in measuring the antenna radiation is currently under investigation.…”

Section: Am( 3 ) = [Exp(ikor)/4nr] D 3 R ' I M ( 7 R )supporting

confidence: 81%

“…As such, there is considerable interest in developing simpler, more robust technologies to increase reliability and lower costs. The use of ferrite materials in antenna apertures as either a radiator or scatterer is one relatively undeveloped technique for providing electronic control, although its deployment in discrete phase shifting components is well known [l], [2]. It has been demonstrated [ 3 ] , [4] that ferrite materials are useful in generating circularly polarized radiation and providing frequency tuning and modulation.…”

Section: Introductionmentioning

confidence: 99%

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Antenna array of circular patches on ferrite substrate

How¹,

Liu²,

Vittoria³

et al. 1997

IEEE Trans. Magn.

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Abstruct-The steering properties of a circular patch antenna array fabricated on a yttrium-iron-garnet substrate containing 6 x 6 elements have been calculated. The formulation assumes the interaction between patch elements can be neglected. Also, the Voigt permeability is used as the effective permeability of the substrate. As such, the steering rate of the radiation beam at 12 GHz is found to be 1.67"/0e at the broad side direction. Hexagonal ferrites are suggested to avoid permanent external magnetic bias.

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Section: Am( 3 ) = [Exp(ikor)/4nr] D 3 R ' I M ( 7 R )supporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Antenna array of circular patches on ferrite substrate

How¹,

Liu²,

Vittoria³

et al. 1997

IEEE Trans. Magn.

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“…More recent work includes electronic scanning of an antenna loaded with circularly arrayed ferrite bars [7], electronic scan of a millimeter-wave leakywave antenna with a periodic structure loaded with ferrite [8][9][10][11], and microstrip antennas on a ferrite substrate [12][13][14][15][16][17][18]. Of these, the periodic ferrite structure can be applied not only for a leaky-wave antenna but also for a magnetically tunable Bragg reflection filter [19].…”

Section: Introductionmentioning

confidence: 99%

Radiation characteristics of a slotted parallel plate waveguide filled with a transversely magnetized ferrite

Nishimura

2002

Electron Comm Jpn Pt II

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SUMMARYIn this paper, radiation characteristics such as radiation efficiency and radiation patterns are analyzed by means of the method of moments in the case in which only the TE 1 mode propagates in a slotted parallel plate waveguide filled with a transversely magnetized ferrite. The slot is installed on the upper plate in the ferrite-filled parallel plate waveguide. At millimeter-wave frequencies, the dependence of the radiation efficiency and of the radiation pattern of the ferrite-filled parallel plate waveguide on the applied dc magnetic field is evaluated numerically. The magnetic tunability of the radiation bandwidth and the magnetic control of the radiation pattern of the ferrite-filled slotted parallel plate waveguide are theoretically studied.

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