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Stealth antenna and stealth antenna array based on ultra-wideband low radar cross-section based on phase change film

A radar cross-section and ultra-broadband technology, which is applied to antennas, radiating unit covers, and radiating element structures, can solve the problems of antenna radiation performance degradation, achieve circuit area reduction, scan beam narrowing, and feeder network simplification Effect

Active Publication Date: 2022-04-12
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the general antenna RCS is reduced, it will lead to the reduction of its antenna radiation performance

Method used

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  • Stealth antenna and stealth antenna array based on ultra-wideband low radar cross-section based on phase change film
  • Stealth antenna and stealth antenna array based on ultra-wideband low radar cross-section based on phase change film
  • Stealth antenna and stealth antenna array based on ultra-wideband low radar cross-section based on phase change film

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A stealth antenna with ultra-wideband and low radar cross-section based on phase-change film

[0044] see figure 1 , figure 2 , the stealth antenna includes a dielectric substrate 1 , an H-shaped metal patch 2 , a ground plate 4 and a heat shield 8 .

[0045] see figure 2 , the material of the dielectric substrate 1 is sapphire. The H-shaped metal patch 2 is arranged on one side of the dielectric substrate 1 , the horizontal patch lower part of the H-shaped metal patch 2 is connected to the patch transmission line 22 , and the patch transmission line 22 extends to the edge of the dielectric substrate 1 . The two vertical patches 21 of the H-shaped metal patch 2 on both sides of the patch transmission line 22 are respectively embedded with a phase change film 3; the material of the phase change film 3 is vanadium dioxide (VO 2 ), when the phase change film 3 is at the operating temperature, the conductivity is 10 6 S / m.

[0046] The preparation operation of the p...

Embodiment 2

[0056] Stealth antenna array based on the stealth antenna of embodiment 1 as an antenna unit

[0057] see Figure 7 , the stealth antenna array includes four stealth antennas and power divider 9, the patch transmission lines 22 of the four stealth antennas are connected in parallel to the high impedance line 91 of the power divider 9, the outer end of the high impedance line 91 of the power divider 9 and Outer ends of the low impedance lines 92 respectively extend to the edges of the dielectric substrate 1 .

[0058] see Figure 8 , a structure on one side of the ground plate 4 of the four stealth antennas.

[0059] The working frequency band of the stealth antenna array of the present embodiment 2 is 6-12GHz, the resonant frequency is 9.0GHz, and the working wavelength is λ 0 =1.185mm. The size parameters of each stealth antenna are the same as those in Embodiment 1.

[0060] see Figure 7 , on the basis of the stealth antenna in Embodiment 1, the distance between the a...

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Abstract

The invention relates to a stealth antenna with ultra-wideband and low radar scattering cross-section based on a phase-change film, and belongs to the field of planar microwave devices. It includes a dielectric substrate, an H-shaped metal patch and a grounding plate; two vertical patches of the H-shaped metal patch are respectively embedded with a phase change film; a hollow groove is opened on the grounding plate; one side of the H-shaped metal patch A hot air cover is arranged on the medium base plate, and a heating resistance wire is arranged on the hot air cover. The invention utilizes the phase change film, the antenna does not work before the phase change, and the heating resistance wire is not energized, so that the phase change film phase changes into an insulating property, and the RCS is low in a "stealth state"; when the antenna is working, the heating resistance wire is energized to keep the hot air cover The temperature of the air inside is stable at 68-72°C, which makes the phase-change film phase-change into a conductor, and the conductivity increases rapidly, so that the antenna can still maintain good antenna characteristics when it is working. The invention realizes the enlargement of the aperture of the antenna array, the narrowing of the scanning beam, the enhancement of the directivity, the weakening of the mutual coupling between the array elements, the simplification of the feeding network, etc., and is suitable for the broadband system.

Description

technical field [0001] The invention belongs to the field of planar microwave devices, and relates to microstrip patch antenna devices, vanadium dioxide metamaterials, etc., in particular to the design of microstrip array antennas with low RCS based on vanadium dioxide phase-change thin films. Background technique [0002] Metal microstrip antennas are widely used in the field of communication. In the military, the requirements for radiation and scattering performance are high, as well as comprehensive factors such as high gain, broadband, and directivity. The method of carrying multiple antennas or array antennas on the same platform seriously increases the difficulty of integration and increases the cost. To address the needs of communication systems, reconfigurable antennas are proposed. As a new type of antenna, the reconfigurable antenna can realize the functions of multiple antennas by changing the shape of the antenna, thereby reducing the load weight on the antenna,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/42H01Q19/00
CPCH01Q1/42H01Q19/005H01Q1/38
Inventor 桑磊陈超徐吉王祖健李永林
Owner HEFEI UNIV OF TECH
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