Ka-band micro-integrated array antenna based on substrate integrated radial resonance power division network

Abstract

The invention discloses a Ka-band micro-integrated array antenna based on a substrate integrated radial resonance power division network, and relates to the technical field of microwaves / millimeter waves. Radial power division of the substrate integrated waveguide is improved on the basis of a common rectangular substrate integrated waveguide, the outermost circle of metal through holes distributed along the circumference of the structure play the same role as the metal through holes in the two sides of the traditional rectangular substrate integrated waveguide, and leakage of electromagnetic waves is effectively prevented; and a coaxial current input probe is located in the middle of the whole power dividing feed network, an outer conductor of the coaxial current input probe is in contact with the first layer of grounding plate, an inner conductor of the coaxial current input probe completely extends into the first dielectric substrate, and feed is conducted from the back face of the whole power dividing feed network. An output probe formed by eight metal through holes symmetrically distributed around the coaxial current probe along the same circumference couples and transmits current input by the coaxial current probe upwards, and the current is transmitted to the uniform circular array antenna unit on the uppermost layer through the first dielectric substrate, the second grounding plate, the prepreg and the second dielectric substrate in sequence, so that equal-amplitude in-phase feed is realized.

Description

technical field [0001] The invention relates to the field of microwave / millimeter wave technology, in particular to a micro-integrated structure of a Ka-band uniform circular array antenna. Background technique [0002] The micro-integrated structure of the uniform circular array antenna proposed by the present invention combines the array antenna with the power dividing network, and realizes the power feeding from the power dividing network to the array antenna through the output probe running through the whole structure. At present, most of the integrated uniform circular array antennas proposed by domestic and foreign researchers perform impedance transformation by changing the length and routing angle of the microstrip line, so that the feed signals of adjacent rectangular patches have a phase difference or are in a uniform circular array. A series of RF components are added to the input of the antenna, including digital phase shifters to achieve phase shift (M.Donelli, ...

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Problems solved by technology

[0003] In view of the problems existing in the above structure, in order to solve the problems of low integration, complex processing technology and high cost in the existing uniform circular array antenna structure, the present invention proposes a uniform circular array antenna for the Ka band, the structure The center frequency is 30GHz, and the array antenna and the substrate integrated waveguide power distribution network are micro-integrated. Compared with other structures, the overall volume is greatly reduced, the amount of impedance matching calculation is reduced, and a lot of cost is saved.

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