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Phased array antenna based on meta-material electromagnetic characteristics

A technology for phased array antennas and electromagnetic characteristics, which is applied in antennas, antenna unit combinations with different polarization directions, antenna grounding switch structural connections, etc., can solve the problem of only 17.5°, reliability and application scenarios, and increase the overall height of the antenna etc. to achieve the effect of reducing sidelobe level, reducing the pressure of miniaturization, and improving pointing accuracy

Active Publication Date: 2017-10-20
BEIJING HUAMETA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the entire row and column phase shifting method of Raytheon Company of the United States reduces the number of phase shifters, but also increases the overall height of the antenna; the VICTS antenna of Xinkang Company of the United States, although the beam scanning range becomes larger, it is about ±70 °, which is larger than the beam scanning range of the world's most advanced phased array antenna ±65°, but the antenna needs to be mechanically rotated by multiple components, and its reliability and application scenarios will be affected to a certain extent
Harbin Institute of Technology, China An electronically controlled zero-crossing scanning waveguide leaky-wave antenna using liquid crystal material permittivity ε r With the change of bias voltage, the guide wavelength of the waveguide feeding the leaky wave antenna is changed to realize beam scanning. This design can only realize beam scanning in a limited range (-8.2° to 9.3°), and the scanning range is only 17.5°. And the beam can only scan in one dimension

Method used

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  • Phased array antenna based on meta-material electromagnetic characteristics
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  • Phased array antenna based on meta-material electromagnetic characteristics

Examples

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Embodiment 1

[0039] A phased array antenna based on the electromagnetic properties of metamaterials, such as Figure 4 As shown, the phased array antenna includes a microstrip patch antenna unit and a feeding device; in this embodiment, the feeding device is a parallel plate waveguide 201 filled with a metamaterial medium 209 inside, and the microstrip patch The chip antenna unit includes a layer of metamaterial dielectric substrate 206, one side of the metamaterial dielectric substrate 206 is provided with a microstrip patch unit 207 as a positive electrode, and the other side uses the upper conductive plate of the parallel plate waveguide 201 as a negative electrode , wherein the slit 205 provided on the upper conductive plate of the parallel plate waveguide; the phased array antenna also includes a microstrip line network 202 for feeding the parallel plate waveguide 201, a dielectric plate 203, a piezoelectric sensor 204, a bias voltage A control unit 208 and a bias voltage driving circ...

Embodiment 2

[0047] A phased array antenna based on the electromagnetic properties of metamaterials, this embodiment is basically the same as Embodiment 1, the difference is that in this embodiment, the feeding device uses a radial line waveguide. Such as Figure 5 and Figure 6 As shown, the feeding device includes a lower radial waveguide 301, an upper radial waveguide 302, a conductive plate 305 arranged between the upper radial waveguide and the lower radial waveguide, and a The lower radial line waveguide is opposite to the upper layer conductive plate 308 on the side of the upper layer radial line waveguide, the coaxial probe 303 feeding the lower layer radial line waveguide, and the absorber arranged in the upper layer radial line waveguide 304, a reflector 306, an isolation device 307, a dielectric material 309 filling the DC isolation device 307, a through hole 310 opened on the dielectric material 309, a microstrip patch unit 207, and a Slot coupling slot 205 .

[0048] In thi...

Embodiment 3

[0053] A phased array antenna based on the electromagnetic properties of metamaterials, this embodiment is basically the same as embodiment 1 or embodiment 2, the difference is that a layer of metamaterial covering layer (such as Figure 7 As shown), the metamaterial covering layer is composed of a frequency selective surface, which can selectively propagate and reflect electromagnetic waves by using the frequency selective surface. The device can be placed on the metamaterial phased array antenna array of the above-mentioned embodiment 1 or embodiment 2. The metamaterial covering layer utilizes the propagation and reflection characteristics of the frequency selective surface to electromagnetic waves, which can not only further increase the scanning range of the main beam of the metamaterial phased array antenna in the above-mentioned embodiment 1 or embodiment 2, but also effectively reduce the Radar cross-sectional area, to achieve the effect of invisibility.

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Abstract

The invention mainly belongs to the technical field of microwaves and millimeter waves and particularly relates to a phased array antenna based on meta-material electromagnetic characteristics. The phased array antenna comprises a microstrip patch antenna unit and a feed device. The microstrip patch antenna unit comprises a positive electrode, a dielectric substrate and a negative electrode. The microstrip patch antenna unit adopts a metamaterial as the dielectric substrate. By applying a bias voltage to the metamaterial dielectric substrate and changing the dielectric constant [Epsilon]r of the metamaterial dielectric substrate, a microstrip patch unit to which the bias voltage is applied is enabled in a resonant condition. A microstrip patch unit to which the bias voltage is not applied is not in the resonant condition, to achieve sparsification of the phased array antenna unit. The phased array antenna unit of the present invention controls the excitation phase of the activated radiation unit more precisely so as to improve the pointing accuracy of the main beam of the antenna, increase the antenna gain, reduce the antenna side lobe level, expand the antenna beam scanning range and extend the working bandwidth of the antenna.

Description

technical field [0001] The invention mainly belongs to the technical field of microwave and millimeter wave antennas, and in particular relates to a phased array antenna based on the electromagnetic properties of metamaterials, which is widely used in communication and radar systems. Background technique [0002] Since World War II, phased array antenna technology has gone through four stages of development: passive phased array antenna, active phased array antenna, bidirectional phased array antenna and monolithic microwave integrated circuit phased array antenna. [0003] At present, with the rapid development of microelectronics technology, the important components of phased array antennas, such as T / R modules and phase shifters, can be highly integrated on microchips, which greatly reduces the cost of phased array antennas. The profile and weight of the antenna, but the high cost of this type of phased array antenna limits the popularization and application of the phased...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/24H01Q15/00H01Q1/50
CPCH01Q1/50H01Q15/0086H01Q21/0006H01Q21/24
Inventor 杨智友修威杨光
Owner BEIJING HUAMETA TECH CO LTD
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