Three-frequency medium resonant antenna with function of coaxial feed

A technology of dielectric resonant antenna and coaxial feed, applied in resonant antenna, antenna, slot antenna, etc., can solve the problem of large volume of dielectric resonant antenna, and achieve the effect of small dielectric loss, high radiation efficiency and low radiation Q factor

Inactive Publication Date: 2011-07-20
ZHEJIANG UNIV
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Such a structure makes the volume of

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  • Three-frequency medium resonant antenna with function of coaxial feed
  • Three-frequency medium resonant antenna with function of coaxial feed
  • Three-frequency medium resonant antenna with function of coaxial feed

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Embodiment Construction

[0033] Any structure that can limit electromagnetic energy to oscillate within a certain volume can constitute an electromagnetic resonator. This oscillating structure is generally a volume defined by electric or magnetic walls of any shape, and microwave electromagnetic oscillations are generated inside the structure under external excitation. A dielectric resonator is a microwave resonant element with storage energy and frequency-selective characteristics. The principle of work and failure is similar to the lumped element resonator in circuit theory.

[0034] From the reflection and refraction of the high dielectric constant medium and air interface, it can be concluded that the high dielectric constant interface has similar characteristics to the conductor wall, which can completely or nearly completely reflect the electromagnetic wave. The conductor wall is called an electric wall, the tangential component of its electric field is zero, the normal component of the magnetic...

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Abstract

The invention discloses a three-frequency medium resonant antenna with a function of coaxial feed. A medium resonant cavity is the resonant cavity which is made from a high dielectric constant material, the medium resonant cavity is arranged on a ground potential surface, the upper part at the center in the medium resonant cavity is embedded with an air resonant cavity, a filling medium in the air resonant cavity is air, a metal paster is arranged at the center of the upper ends of the medium resonant cavity and the air resonant cavity, a coaxial feed source comprises a probe needle, a mediumlayer and an outer conductor, the probe needle penetrates through the ground potential surface from the lower part of the ground potential surface to enter into the medium resonant cavity, the mediumlayer is arranged between the ground potential surface and the probe needle, and the medium layer under the ground potential surface is externally provided with the outer conductor. The medium resonant cavity, the air resonant cavity and the metal paster are integrated with one another to offer three different frequency points, so that the three-frequency medium resonant antenna has the characteristics of being small in volume and wide in frequency band, thereby being capable of playing an important role in satellite communication and military electronic countermeasure uniquely.

Description

technical field [0001] The invention relates to a dielectric resonant antenna, in particular to a coaxial feeding tri-frequency dielectric resonant antenna. Background technique [0002] Due to the development of wireless communication technology, people's requirements for the performance of antennas that are indispensable in the system are also increasing, such as smaller size, larger bandwidth, and lower loss. However, the application and development of antennas are limited by two key technologies, the high metal ohmic loss in the high frequency band and the large geometric size of the antenna in the low frequency band. Therefore, the dielectric resonant antenna has been widely concerned and researched due to its good performance. Dielectric resonant antennas are widely used in wireless communication, such as mobile terminals, wireless access points, base stations and other communication equipment and systems. They are also widely used in some tactical systems that the Mi...

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Application Information

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IPC IPC(8): H01Q5/01H01Q9/04H01Q13/18H01Q5/10
Inventor 吴锡东吴慧娴杨楠周金芳李波
Owner ZHEJIANG UNIV
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