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Ultra-short wave broadband omnidirectional antenna

An omnidirectional antenna and ultra-short wave technology, which is applied in the direction of antenna grounding switch structure connection, radiation element structure, etc., can solve the problems of increased loss, decreased antenna efficiency, and decreased antenna power resistance, so as to widen the working bandwidth and improve symmetry , Increase the effect of the working frequency band

Inactive Publication Date: 2013-06-19
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

The impedance bandwidth of a conventional printed dipole antenna with a VSWR of less than 2 is generally only about 9%; there is also a technique of using a dipole antenna for loading to widen the working bandwidth of the antenna, but this method will increase the loss due to the introduction of loading components Decrease the efficiency of the antenna and reduce the power resistance of the antenna

Method used

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  • Ultra-short wave broadband omnidirectional antenna

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with specific embodiments.

[0018] figure 1 It is a structural schematic diagram of the ultrashort wave broadband omnidirectional antenna in the present invention. An ultrashort wave broadband omnidirectional antenna, comprising a first upper radiation oscillator 1, a metal transition section 2, a second upper radiation oscillator 3, a metal connection section 4, a lower radiation oscillator 5, a parasitic radiation oscillator 6, a parallel open circuit branch 7, parallel double The wire transmission line 8, the metal sleeve 9 covering the second upper radiation oscillator and the metal sleeve 10 outside the lower radiation oscillator. The first upper radiating oscillator 1 is connected to the second upper radiating oscillator 3 through a metal transition section 2 , and the upper and lower radiating oscillators are connected through a metal connecting section 4 .

[0019] figure 2 It is a schem...

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Abstract

The invention discloses an ultra-short wave broadband omnidirectional antenna. The antenna comprises a first upper radiation oscillator (1), a metal transition section (2), a second upper radiation oscillator (3), a metal connecting section (4), a lower radiation oscillator (5), a parasitic radiation oscillator (6), a parallel open stub (7), a parallel two-conductor transmission line (8), a metal casing (9) sleeved outside the second upper radiation oscillator and a metal casing (10) sleeved outside the lower radiation oscillator, wherein the first upper radiation oscillator (1) is connected with the second upper radiation oscillator (3) through the metal transition section (2); and the upper and lower radiation oscillators are connected through the metal connecting section (4). Upper radiating bodies of the antenna are subjected to electromagnetic coupled feeding, so that the impedance bandwidth of the antenna is effectively increased, and the working band of the antenna is widened.

Description

technical field [0001] The invention relates to an omnidirectional antenna, in particular to an ultrashort wave broadband omnidirectional antenna. Background technique [0002] In the military communication system, in order to ensure the quality of communication and the confidentiality of information, frequency hopping spread spectrum technology is widely used in the communication stations of military short-wave band and ultra-short wave band. With the development of technology, the frequency hopping rate is getting higher and higher, and the range of frequency hopping is getting wider and wider, and some even reach dozens of frequency multiples. This requires that the antenna must be a non-tunable broadband antenna with a wide operating bandwidth; at the same time, more and more electronic devices that meet different needs are concentrated on the same carrier, which forms a complex electromagnetic environment. Due to the strong near-field coupling, the respective performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50
Inventor 张志亚傅光赵佳越冀璐阳张晓璐
Owner XIDIAN UNIV
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