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Reconfigurable Broadband Phase Modulation Screen Based on Artificial Magnetic Conductor

A technology of broadband phase modulation and artificial magnetic conductor, applied in the direction of antennas, electrical components, etc., can solve the problem of thickness, etc., and achieve the effect of strong adjustability and reduced thickness

Active Publication Date: 2019-10-01
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The traditional phase modulation screen is composed of a metal plate, a quarter-wavelength dielectric interlayer and a periodic patch array, and the thickness is relatively thick

Method used

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  • Reconfigurable Broadband Phase Modulation Screen Based on Artificial Magnetic Conductor
  • Reconfigurable Broadband Phase Modulation Screen Based on Artificial Magnetic Conductor
  • Reconfigurable Broadband Phase Modulation Screen Based on Artificial Magnetic Conductor

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the reconfigurable broadband phase modulation screen based on the artificial magnetic conductor of the present invention is composed of several center-symmetrical frequency-tunable artificial magnetic conductor units 15 arranged two-dimensionally and periodically in the form of a square lattice. Such as figure 2 As shown, the artificial magnetic conductor unit 15 includes an upper metal patch, a middle dielectric substrate, a lower metal ground, a varactor group and a capacitor group.

[0024] The upper metal patch is composed of a central square metal patch 1, a first square ring metal patch 2, and a second square ring metal patch 3, and is printed on the top of the dielectric substrate 13, and a metal ground 14 is provided on the bottom surface. The square metal patch and the square ring ...

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Abstract

The invention discloses a reconfigurable broadband phase modulation screen based on an artificial magnetic conductor, which controls the gap capacitance between the patches by changing the capacitance value of the varactor, so that the periodic unit has multiple continuous frequency points, and The phase difference between every two adjacent frequency bands satisfies 143°~217°, so the above-mentioned periodic structure can absorb incident electromagnetic waves in a wide frequency band and realize a broadband phase modulation screen with a relative bandwidth of 45.2%. The artificial magnetic conductor structure adopted by the invention has a simple structure, is easy to process, and has a thickness less than one-twentieth of the working wavelength, greatly reducing volume and cost.

Description

technical field [0001] The invention belongs to the technical field of microwave circuits, in particular to a reconfigurable broadband phase modulation screen based on an artificial magnetic conductor. Background technique [0002] Radar cross section (Radar Cross Section, RCS) is a physical quantity of the echo intensity generated by the target under the irradiation of radar waves. Radar Absorbing Material (RAM) is widely used. Radar absorbing materials convert electromagnetic wave energy into electrical energy, thereby reducing energy reflection and achieving stealth requirements. The working principle of the phase modulation screen is different from other radar absorbing materials. It can shift the frequency of the energy of the incident electromagnetic wave, so that the reflected signal falls outside the passband range of the radar receiver, thereby reducing the reflectivity. The traditional phase modulation screen is composed of a metal plate, a quarter-wavelength die...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/002H01Q15/0046H01Q15/0086H01Q17/007
Inventor 常玉梅王琳李波薄亚明祝雷
Owner NANJING UNIV OF POSTS & TELECOMM
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