Frequency-adjustable directed-radiation antenna

A directional radiation and antenna technology, applied in the direction of antennas, electrical components, etc., can solve the problems of high directional frequency adjustable antennas, low directivity, limited frequency adjustment range, etc., and achieve simple structure, high directivity, The effect of small half power point width

Active Publication Date: 2015-02-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the frequency tunable antenna realized by the existing technology has low directivity and limited frequency adjustment range, which cannot meet the application requirements of high directional frequency tunable antenna

Method used

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  • Frequency-adjustable directed-radiation antenna
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  • Frequency-adjustable directed-radiation antenna

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Embodiment Construction

[0025] Below in conjunction with the accompanying drawings and specific embodiments, the present invention will be further clarified. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Modifications of equivalent forms all fall within the scope defined by the appended claims of this application.

[0026] like figure 1 As shown, the frequency-adjustable directional radiation antenna of the embodiment of the present invention mainly includes a magnetic photonic crystal composed of a plurality of soft ferrite 4 cylinders (referred to as "magnetic cylinders"), a rectangular base material (not shown in the figure). ) and line source 1, using the band gap of soft ferrite, its material can be magnesium-manganese ferrite, yttrium iron garnet ferrite, nickel-zinc ferrite, etc. The base material can be selected from foam, plexiglass, nylon Etc., the substrate is provided with a through ho...

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PUM

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Abstract

The invention discloses a frequency-adjustable directed-radiation antenna which comprises a substrate with multiple through holes, a magnetic photonic crystal and a line source. The magnetic photonic crystal is composed of multiple soft magnetic ferrite columns and is of a periodic array structure, each soft magnetic ferrite column is disposed in the corresponding through hole, a bias magnetic field is externally added along the axial direction of the soft magnetic ferrite columns, the line source is positioned in the middle of the photonic crystal, a metal cover plate is arranged on each of the upper surface and the lower surface of the substrate, an aluminum foil covers one side, opposite to the radiation direction, of the photonic crystal, and two ends of the soft magnetic ferrite columns are close to the metal cover plates. The frequency-adjustable directed-radiation antenna has the characteristics of wide frequency band, good directed radiation performance and the like and has the advantages of simple structure, easiness in processing and realizing, low cost and the like.

Description

technical field [0001] The invention relates to an antenna, in particular to a directional radiation antenna, and more specifically to a frequency-adjustable magnetic photonic crystal directional radiation antenna. Background technique [0002] Antennas are components used in radio equipment to transmit or receive electromagnetic waves. In engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasures, remote sensing, and radio astronomy, those who use electromagnetic waves to transmit information must rely on antennas to work. In addition, antennas are also used for non-signal transmission, such as wireless energy transmission. [0003] Modern communication systems often have multiple antennas, and the problem of electromagnetic compatibility between antennas is becoming increasingly prominent. In order to solve this problem, the concept of reconfigurable antenna is proposed, that is, one set of antennas is used to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/12
Inventor 撒忠昊伍瑞新
Owner NANJING UNIV
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