Planar tight-coupling bipolar ultra-broadband phased array antenna

Abstract

The invention discloses a planar bipolar ultra-broadband phased array antenna based on tight-coupling dipole subunits, and belongs to the technical field of electrocommunication, particularly ultra-broadband phased array antennas. Existing tight-coupling antenna array structures and feeder networks are improved, a grounding hole to the ground is introduced to each monopole of a dipole sub-antenna-unit, therefore, common-mode signal interference which influences the broadband antenna performance is eliminated, a necessary broadband Balun device in the existing tight-coupling antenna feeder networks is removed, and the defects are overcome that existing broadband phased array antennas are high in cost, not easily conformal and complex in manufacturing and cannot achieve the modularized function. The achieved novel planar tight-coupling bipolar ultra-broadband phased array antenna has the advantages of being high in index, broad in frequency band, miniaturized, easily conformal, simple instructure, capable of being assembled in a modularized mode, and can meet the requirements on a new generation of phased array antennas of the development of modern civil mobile communication systemsand military detection radar systems.

Description

technical field [0001] The invention belongs to the technical field of electronic communication, in particular to the field of ultra-wideband phased array antennas. Background technique [0002] Although the traditional wideband array technology has made significant progress in research over the years, it still has problems such as high cost, complicated manufacturing, and difficulty in matching with platforms (airframes, vehicles, and ships, etc.). What's more, due to the high difficulty of manufacturing, it is difficult to extend its operating frequency beyond the Ku-band, and there are often a large number of balun devices in these arrays, making system integration more complicated. [0003] For broadband array antennas, there are currently three main categories: vertical antenna arrays, full planar antenna arrays, and tightly coupled antenna arrays. [0004] Vertical antenna arrays include tapered slot antenna arrays, quasi-dipole antenna arrays, etc., and their working...

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Problems solved by technology

[0007] By improving the existing tightly-coupled antenna array structure and feeder network, introducing ground holes on each monopole of the dipole antenna unit to eliminate common-mode signal interference that affects the performance of broadband antennas, and canceling the existing tightly-coupled antenna feeder network The broadband balun device that must exist in the antenna, the invention can solve the defects of the existing broadband phased array antennas, such as high cost, difficulty in conformal shape, complicated fabrication and inability to realize modular functions

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