Gradient refractive index medium lens and gradient refractive index medium lens antenna

A technology of dielectric lens antenna and gradient refractive index, which is applied in the field of gradient refractive index dielectric lens and gradient refractive index dielectric lens antenna, can solve the problems of antenna difficulty, difficult material realization, dispersion, etc., and achieve good directivity, working frequency bandwidth, achieve convenient effects
CN102769208AInactive Publication Date: 2012-11-07SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Publication Date
2012-11-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a gradient refractive index medium lens and a gradient refractive index medium lens antenna, wherein a refractive index distribution of a semi-cylindrical gradient refractive index medium lens meets a formula disclosed in the specification, and a refractive index distribution of a hemispheric gradient refractive index medium lens meets a formula disclosed in the specification. According to the principle of optical transformation, the refractive index of the semi-cylindrical or hemispheric gradient refractive index medium lens is obtained by adopting conformal transformation calculation and is greater than 1. The semi-cylindrical or hemispheric gradient refractive index medium lens has the advantages of regular distribution, convenience for realization, and wide working band, can not only be used for imaging singly but also be used in the fields of communication and radar by increasing a reflecting surface, and is cooperated with other devices to form an antenna system. According to the gradient reflective index medium lens antenna provided by the invention, the semi-cylindrical or hemispheric gradient refractive index medium lens is used as a main body, thereby having the advantages of good directionality.
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Description

technical field

[0001] The invention relates to the field of dielectric lenses, in particular to a gradient refractive index dielectric lens and a gradient refractive index dielectric lens antenna. Background technique

[0002] Antennas are important devices for directional emission of electromagnetic waves. Common antennas include reflector antennas, horn antennas, and lens antennas. Among them, the structure of the reflector antenna is simple, but the feed source is located in front of the aperture, which will cause a certain shielding of the radiation of the antenna; the pattern of the horn antenna is easy to control, but it often needs to correct the phase when it is used, and it is limited by radio waves or microwaves. frequency band; the directional pattern of the lens antenna is better, but sometimes it is bulky, such as the classic Lunberg lens antenna, the main structure of which is a complete cylinder or spherical lens.

[0003] Transformation optics theory is a m...

Claims

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