Ultra-low profile strong coupling ultra-wideband phased array based on magnetic medium type artificial magnetic conductor

Abstract

The invention discloses an ultra-low profile strong coupling ultra-wideband phased array antenna based on a magnetic medium type artificial magnetic conductor structure. The antenna comprises a radiation unit layer printed on an ultra-thin medium layer and an artificial magnetic conductor reflecting plate. The tail ends of dipole antenna units in the radiation unit layer are respectively extendedto the tail ends of adjacent dipole antenna units to form an interdigital capacitor capable of enhancing the capacitive coupling amount between the units. The antenna can achieve two-dimensional wide-angle scanning with + / -60 degrees in a 3.3-times frequency interval range, an artificial magnetic conductor structure by taking the magnetic medium as a medium substrate is loaded, and the height of the section of the antenna is only about 0.03 times of the high-frequency wavelength to meet the requirements of ultra-wideband wide-angle scanning and ultra-low section of the antenna. The ultra-low profile strong coupling ultra-wideband phased array antenna is especially suitable for an application platform requiring the ultra-wide working band and meeting the ultra-low section requirements of the antenna.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, in particular to an ultra-wide bandwidth angular scanning phased antenna array system, specifically an artificial magnetic conductor (AMC) loaded with ultra-wide bandwidth based on strong mutual coupling effect The low-profile phased antenna array can be used for electronic platforms that require ultra-wideband and low profile. Background technique [0002] The phased array antenna refers to the antenna array that realizes the spatial scanning of the array antenna beam by controlling the feeding phase of each antenna element in the antenna array. As the development trend of phased array antenna, UWB phased array is an inevitable requirement for the development of wireless electronic technology. The design idea of ​​the traditional UWB phased array antenna is to design the isolated antenna unit as the starting point, and then form the broadband antenna array by proper arraying of the ...

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Problems solved by technology

However, the profile height of the antenna is 0.95 times the high-frequency wavelength, which is much smaller than the traditional Vivaldi antenna, but it is still difficult to meet the low profile or even conformal requirements

In the Chinese patent "A strong mutual coupling ultra-wide bandwidth angular scanning dual-polarization conformal phased array antenna" with the application number 201710515792.X, a combination of dipole and conformal array based on the strong mutual coupling effect is proposed A new type of conformal array, the conformal array uses a truncated cone as the carrier, the section height is 0.43 times the high-frequency wavelength, and can achieve ±60° scanning in the range of 6-18GHz, although the section height of the conformal array is lower than the above, But the working bandwidth is also reduced to 3:1, and the height of the antenna profile is still high in the lower working frequency band

In 2013, the article "UWB Low-Proile Tightly Coupled Dipole Array With Integrated Balun and Edge Terminations" published in IEEE Transactions on Antennas and Propagation (IEEE T-AP) proposed a strong mutual coupling phased array antenna working at 200MHz-600MHz , the profile height is only 0.3 times the high-frequency wavelength, but the antenna can only achieve ±30° scanning

But none of these antennas have the capability of wide-angle broadband scanning

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