Super-wide bandwidth angle antenna array based on inter-digital tightly coupled dipole unit

Abstract

The invention discloses a super-wide bandwidth angle antenna array based on an inter-digital tightly coupled dipole unit. The array comprises an inter-digital dipole and a feeder balun, the feeder balun consists of three parts: a plane double line, a gradient transmission line used as the ground and a final micro-strip line, so that impedance matching from 170Omega to 50Omega and electric field transition from unbalance to balance are achieved. Based on a dipole array antenna, a mutual coupling effect between array elements is utilized to expand a phased array frequency band bandwidth, and a wide angle matching layer is introduced to improve a scanning characteristic of the antenna array. Because the antenna takes the tightly coupled dipole unit as a terminal load, a balanced feed form is needed, but a general feed source is an unbalanced feed source like an axis, so that stable unbalance-balance transition is needed to be completed by the feeder balun to ensure broadband performance of the antenna array. The super-wide bandwidth angle antenna array based on the inter-digital tightly coupled dipole unit has the advantages of being simple in structure, compact in size, wide in bandwidth angle and easy to process, and has significance of practical engineering.

Description

technical field [0001] The invention relates to the technical field of ultra-wideband phased array antennas, in particular to an ultra-wide bandwidth angle antenna array based on interdigitated tightly coupled dipole units. Background technique [0002] Phased array antenna is a modern antenna form developed on the basis of array antenna. Using broadband antenna elements, according to certain rules, they are arranged into one-dimensional, two-dimensional or other array forms to avoid possible pattern distortion and scanning blind spots, which constitutes the basic structure of broadband phased array. The phased array is based on the principle that the beam shifts when the aperture field phase is linearly changed, and the phase of the radiation field of each unit in the array antenna is changed by electronic control, and the main lobe beam is used for scanning. When the broadband characteristics and wide-angle scanning characteristics are combined, a broadband phased array a...

AI Technical Summary

Problems solved by technology

For example, the antenna element bandwidth will limit the array bandwidth, and the spatial scanning angle will be affected by the mutual coupling between elements

At the same time, the traditional broadband phased array needs to be realized by dividing sub-arrays, applying optical modulation and demodulation technology, and optical fiber delay line, which requires a large amount of equipment, complex technology, high cost, and is not easy to debug and maintain.

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