77 GHz millimeter-wave radar-based micro-strip array antenna

Abstract

The present invention provides a 77 GHz millimeter-wave radar-based micro-strip array antenna, which comprises a dielectric substrate, and a plurality of antennas arranged on the dielectric substrate.Each antenna consists of a plurality of antenna patches and a feeder line. The antenna patches of each antenna are arranged in a straight line and are connected to one another through the feeder line, wherein the antennas are parallel to one another. The plurality of antennas are composed of multiple transmitting antennas and multiple receiving antennas. The distances between every two adjacent transmitting antennas are equal. The distances between every two adjacent receiving antennas are equal. In this way, an equidistant series-feed network is formed. The plurality of antenna patches of each antenna are gradually changed in width. The 77 GHz millimeter-wave radar-based micro-strip array antenna has the advantages of high stability, small size, low cost, high precision, high response speed and high resolution. The 77 GHz millimeter-wave radar-based micro-strip array antenna can be applied to the millimeter-wave radar system schemes which are low in cost, small in size and high in performance and are used for medium-distance and long-distance detection.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a microstrip array antenna based on a 77GHz millimeter wave radar. Background technique [0002] Millimeter-wave radar is currently widely used in the field of traffic detection, and 77GHz millimeter-wave radar has a great advantage in terms of volume, detection accuracy and detection distance, because the 77GHz radar microstrip antenna is easier to Narrow beam and high gain are achieved with a small antenna volume. Because of these characteristics, 77GHz-based millimeter-wave radars will become standard for active safety. At present, the known and mature 77GHz millimeter-wave radar solutions are all from foreign suppliers, and domestic universities and suppliers have little research on this aspect. In terms of 77GHz millimeter-wave radar antenna design, mature solutions are also from foreign suppliers based on the design of radar chips from NXP / Infineon / STMicroelectronics. At present,...

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Problems solved by technology

[0008] As mentioned above, the first patent solution does not consider the volume factor. When designing the antenna, a 12*12 square array composed of 144 antenna elements with a large spacing is used, which will have a greater impact on the overall PCB size. ; The antenna design mechanism of the second patent scheme is complicated, and the volume is large, and it is not easy to be commercialized; the antenna design scheme mentioned in the third patent is difficult to achieve high transmission power, and it is difficult to realize the metallized through-hole array; The solution mentioned in the last patent provides the specific implementation link of the dielectric lens antenna and the array, but the implementation in a specific working frequency band such as 77GHz does not reveal the specific content.

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