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Design technology of horizontal polarization omnidirectional antenna with adjustable lobe elevation angle

An omnidirectional antenna and leveling technology, which is applied to antenna unit combinations with different polarization directions, antenna supports/mounting devices, and structural forms of radiation elements, etc., can solve the problem of non-adjustable antenna pitch beam pointing and antenna impedance matching difficulties, etc. problem, to achieve the effects of simple beam pointing adjustment, reduced matching difficulty, and increased gain

Inactive Publication Date: 2012-07-11
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a design technology for horizontally polarized omnidirectional antennas with adjustable lobe elevation angles, which overcomes the shortcomings of antenna impedance matching difficulties and antenna elevation beam pointing that cannot be adjusted.

Method used

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  • Design technology of horizontal polarization omnidirectional antenna with adjustable lobe elevation angle
  • Design technology of horizontal polarization omnidirectional antenna with adjustable lobe elevation angle
  • Design technology of horizontal polarization omnidirectional antenna with adjustable lobe elevation angle

Examples

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Effect test

Embodiment 1

[0030] see figure 1 , a horizontally polarized omnidirectional antenna with adjustable lobe elevation angle. The whole antenna includes a metal reflector 1 at the top, an omnidirectional microstrip antenna 2 , a polytetrafluoroethylene dielectric column 3 , and a metal reflector 4 at the bottom. The middle of each medium column is connected by a medium flange 5 . The omnidirectional microstrip antenna is fixed between the upper and lower dielectric flanges, and the dielectric column is inserted into the mounting hole of the metal plate to fix it. Both the upper and lower metal plates have a diameter of 90 mm and a thickness of 2 mm. A perforation 10 with a diameter of 12mm is provided on the lower metal plate, through which the coaxial cable for feeding passes.

[0031] Such as figure 2 As shown, the omnidirectional microstrip antenna 2 is composed of a dielectric plate 6 , four microstrip dipoles 7 and a feed network 8 . Four microstrip dipoles are evenly etched on the ...

Embodiment 2

[0042] A preferred embodiment of the present invention is an S-band horizontally polarized omnidirectional antenna whose elevation plane points to 60 degrees. This antenna is obtained by increasing the diameter of the metal plate below the antenna in Embodiment 1 to 200 mm. The radiation pattern of the elevation plane at the center frequency of 2.85GHz is as follows Figure 12 , it can be seen from the figure that the antenna beam on the elevation plane points to 60 degrees.

Embodiment 3

[0044] A preferred embodiment of the present invention is Figure 13 , is a binary linear array applied to the S-band omnidirectional antenna. This antenna is composed of two antenna units in Embodiment 1 superimposed in the axial direction, and the two units can be fed with equal amplitude and same phase to increase the gain in the elevation plane.

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Abstract

The invention relates to a design technology of a horizontal polarization omnidirectional antenna with an adjustable lobe elevation angle, which solves the problems of the traditional horizontal polarization omnidirectional antenna, such as fixed pitch face wave beam directing, low antenna gain and high impedance matching difficulty. The antenna comprises a top-end reflection plate, a micro-strip antenna, a bottom-end reflection plate and supporting medium columns, wherein the micro-strip antenna consists of four arc-shaped micro-strip dipoles which are arranged along the circumstance; metal plates on the top end and the bottom end are arranged on the upper side and the lower side of the micro-strip antenna; the sizes of the upper metal plate and the lower metal plate can change the directing of the pitch face wave beam; the micro-strip antenna is clamped between flanges of the medium columns on two sides and is fixed by bolts; and a hole is punched at the middle part of the lower metal plate and a feed cable can pass through the hole. The standing wave of the antenna is less than 1.5 within 10% of relative frequency band, gain in an azimuth plane is higher than 2.3dB, gain fluctuation is less than 1dB, a cross polarization level is lower than -30dB, and wave beam directing is adjustable. According to the design technology, the antenna gain, the impedance matching, the cross polarization performance and the anti-interference performance of the top end and the bottom end of the antenna are improved. The design technology is suitable for the fields, such as broadcasting communication and electronic countermeasure.

Description

Technical field [0001] The invention relates to a design technology of a horizontally polarized omnidirectional antenna with an adjustable lobe elevation angle, in particular to a single-layer microstrip dipole circular array antenna with bimetal plate loading, medium support, and adjustable elevation beam pointing. The invention can be used not only as a transceiver antenna in the field of radio and television communication, but also as a decoy antenna in electronic countermeasures. Background technique [0002] The radiation pattern of the horizontally polarized omnidirectional antenna is a non-directional circle in the azimuth plane. It is widely used in communication broadcasting, radar beacons, and identification of friend or foe. Since magnetic dipoles do not exist, horizontally polarized omnidirectional antennas need to rely on pattern superposition to form omnidirectional radiation. [0003] Microstrip omnidirectional antennas have been extensively studied because o...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/12H01Q21/24
Inventor 高国明简玲袁洪陈文俊
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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