Millimeter-wave quasi-optical integrated dielectric lens antenna and array thereof

Abstract

The invention relates to the technical field of radar, in particular to a millimeter-wave quasi-optical integrated dielectric lens antenna and an array thereof. The array consists of a microstrip integrated antenna, a dielectric lens, an objective lens, an array base, a reflecting mirror, a protective cover and a beam transfer switch; one end face of the dielectric lens is a hemisphere or an ellipsoid, while the other end face is a cylindrical section; the microstrip integrated antenna is generated by an dielectric substrate, the front surface of the dielectric substrate is closely adhered tothe cylindrical section of the dielectric lens and serves as a feed source, and the back surface is grounded; the hemispherical or ellipsoidal end face of the dielectric lens is an antenna radiating surface; the length of the cylindrical part of the dielectric lens can be changed; the antenna array is arranged into a linear array or an area array; the array base and the reflecting mirror have conical quasi-optical reflecting mirror surfaces; the focus of the objective lens of the linear array or the area array aligns with the central line of the dielectric lens; the protective cover is arranged outside; and the antenna array is controlled by the beam transfer switch. The antenna structure has strong shock resistance and dust prevention, and is suitable for millimeter-wave radars for planes, automobiles and ships, and receiving / emitting sensing of communication equipment.

Description

Technical field [0001] The invention relates to the technical field of communication and radar antennas, in particular to a millimeter wave quasi-optical integrated dielectric lens antenna and its array. Background technique [0002] Millimeter wave communication and radar antennas are commonly used in horn radiation antennas, parabolic reflective Cassegrain antennas, microstrip antennas and other types. The structure of millimeter wave high-end frequency band horn antennas is relatively small, difficult to manufacture and expensive. Moreover, the parabolic reflective Kag antenna with feeder tracks the maneuvering target, the mechanical transmission scan speed is slow, the accuracy is poor, and the failure rate is high in harsh environments, such as the dusty environment of the anti-collision radar equipped in the car, strong vibration, and large temperature difference , The antenna sensor is required to be highly adaptable to the environment, just like the “eyes” must see clearl...

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Problems solved by technology

[0002] Horn radiation antennas, parabolic reflective Cassegrain antennas, and microstrip antennas are commonly used in millimeter-wave communication and radar antennas. Horn antennas in the high-end frequency bands of millimeter waves are relatively small in size, difficult to manufacture, and expensive

Moreover, the feeding parabolic reflective Kag antenna tracks the maneuvering target, the scanning speed of the mechanical transmission is slow, the accuracy is poor, and the failure rate is high in harsh environments, such as the anti-collision radar equipped in the car, which is dusty, strong vibration, and large temperature difference , the antenna sensor is required to have extremely high environmental adaptability, just like the "eyes" must see all kinds of situations on the road in a complex environment at all times, and avoid collisions in real time

In addition, due to the short working wavelength of the millimeter-wave microstrip antenna, the small size of the feed element, and the large dielectric loss of the substrate, it is difficult to obtain the directivity of the narrow beam of the high-gain antenna by simply using the microwave microstrip antenna technology structure.

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