Coaxial series-parallel feed omnidirectional biconical dipole sleeve antenna

A dipole antenna and sleeve antenna technology, applied in the fields of communication and radar, can solve the problems of narrowing of the working frequency band, complex feeding structure, affecting the omnidirectional performance of the antenna, etc., and achieves good impedance matching, low transmission loss and structural simple effect

Pending Publication Date: 2022-01-18
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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Problems solved by technology

Antenna units are generally fed in the form of series feed or parallel feed, which have their own advantages and disadvantages: theoretically, the parallel feed of array elements can ensure the consistency of the amplitude and phase of each unit, but the structure of the feed part is complex and easily affected The omnidirectional performance of the an

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  • Coaxial series-parallel feed omnidirectional biconical dipole sleeve antenna
  • Coaxial series-parallel feed omnidirectional biconical dipole sleeve antenna
  • Coaxial series-parallel feed omnidirectional biconical dipole sleeve antenna

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[0026] Example 1

[0027] Refer Figure 4 , Biconical dipole antenna elements, using a gradient structure that the radiator and the feed port impedance of free space obtained on converting a better match, biconical dipole, the radii a, b, a height H2; radiation vitro coaxial metal sleeve further broadening the bandwidth of the antenna, the sleeve and the radius d height h3. In the case of the same overall height, and match the performance of the antenna radiation is mainly determined by the total height of the sleeve antenna and the ratio of the height h3 of the sleeve, there is an optimum value of this ratio, at this optimal ratio, the most bandwidth of the antenna width. Radius of the sleeve and the radius b of the inner conductor also has a optimum ratio, the adjustment value b at the other parameters given situation can effectively change the impedance bandwidth of the antenna.

[0028] Refer Figure 5 Coaxially series-parallel network branches feeding two power splitter 4 and i...

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Abstract

The invention relates to a coaxial series-parallel feed omnidirectional biconical dipole sleeve antenna, which belongs to the technical direction of antenna microwaves, consists of a biconical dipole sleeve antenna unit and a coaxial series-parallel feed network, and mainly comprises a biconical dipole, a metal sleeve and the coaxial series-parallel feed network, wherein the radiating body gradient structure of the biconical dipole antenna unit can enable the radiating body gradient structure to obtain better impedance matching with a free space; the coaxial metal sleeve outside the radiating body can further broaden the working bandwidth of the antenna unit; and the biconical dipole antenna units are in omnidirectional radiation in the horizontal direction, and a coaxial series-parallel feed network is adopted to form an array in the vertical direction, so that the high-gain performance of the antenna is achieved. The coaxial series-parallel feed network is composed of a linear gradient impedance conversion section and a two-stage coaxial power divider. The coaxial series-parallel feed network has no influence on the direction of a vertical plane directional diagram of the antenna, is simple in structure and easy to realize, and can be used as a structural support of an omnidirectional antenna.

Description

technical field [0001] The invention belongs to the antenna microwave technology direction in the field of communication and radar technology. Background technique [0002] Omnidirectional antennas are widely used in mobile communications, passive reconnaissance, electronic countermeasures and other fields due to their 360° coverage in the horizontal plane. Different application fields have different requirements for the working bandwidth, gain, polarization mode, and structural form of the omnidirectional antenna. At present, conventional omnidirectional antennas are mainly divided into two categories: one is through the improvement of monopole antennas, such as biconical antennas, disc cone antennas and other single antennas, and the polarization form is mostly vertical polarization; the other is based on dipole antennas. The sub-antenna units form an array to realize horizontal or dual polarization. There are generally two implementation forms for omnidirectional antenn...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/12H01Q1/50H01Q9/16
CPCH01Q1/36H01Q1/12H01Q1/50H01Q9/16
Inventor 袁洪肖鸿黄晟崔满堂程海荣
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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