Novel millimeter wave anti-interference microstrip array antenna

Abstract

The invention relates to the technical field of array antennas, and discloses a novel millimeter wave anti-interference microstrip array antenna. The antenna comprises a series-fed receiving antenna array, a series-fed transmitting antenna array and a radiation unit, and the series-fed receiving antenna array and the series-fed transmitting antenna array are arranged outside an anti-interference shielding case; and the anti-interference shielding case is internally provided with a radio frequency chip, the radio frequency chip passes through a feed network and penetrates through a feed line through hole to be electrically connected with a transmitting antenna, the radiation units adopt square microstrip patches, and the radiation units are connected with one another in series to form a microstrip array. According to the invention, the absorption efficiency is formed by the plastic wave-absorbing material loaded with carbon powder, so that the mutual coupling energy of the feed network is effectively absorbed; and by covering the chip and the peripheral active circuit, the wall thickness of the radiation interference shielding case is effectively reduced to be a quarter of the working wavelength of antenna radiation, and the influence of reflection in the cavity on the feed network can be reduced.

Description

technical field [0001] The invention relates to the technical field of array antennas, in particular to a novel millimeter-wave anti-jamming microstrip array antenna. Background technique [0002] With the improvement of the integration degree of electronic equipment, the volume of communication equipment is also becoming smaller and smaller. The microstrip antenna has the characteristics of small size, light weight, low profile, easy installation and conformal to the carrier surface, and the feed network is made together with the antenna, which is suitable for mass production with printed circuit technology. Integrating the microstrip antenna with active devices or circuits can realize a fully integrated transceiver front-end module. Therefore, microstrip antenna technology has received widespread attention and has been widely used in millimeter wave radar, communication, guidance and other fields. [0003] Compared with a single antenna unit that is difficult to meet the...

AI Technical Summary

Problems solved by technology

The traditional shielding measures are based on the metal cavity, and the strong internal reflection crosstalk has seriously affected the amplitude and phase distribution of the feed network.

[0005] In order to solve the problem that the sidelobe level of the pattern increases and the gain decreases caused by the mutual coupling between the microstrip array antenna and the feed network, and the antenna is disturbed and cannot work normally due to the energy leakage of the active circuit and the chip, the present invention proposes a A new millimeter-wave anti-coupling interference microstrip array antenna design. The antenna feed network adopts a conformal design of plastic absorbing materials, which can effectively suppress the radiation leakage of the chip and the coupling interference between the antenna and feed systems, and will not form a metal cavity. Body reflection causes the amplitude and phase mismatch of the feed network. Compared with sponge-type absorbing materials, it is easy to install conformally, has high strength, and is not easy to deform and age.

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