Broadband foldable reflective array antenna

Abstract

The invention discloses a broadband foldable reflective array antenna, and belongs to the technical field of antennas. The broadband foldable reflective array antenna employs a foldable reflective array antenna structure, and provides a brand new reflective array unit, so that the foldable reflective array of the reflective array unit solves the problem that breakthrough on gain bandwidth of a conventional foldable reflective array antenna is hard to achieve. The characteristics of high gain, low loss, compact structure and low cross polarization of a foldable reflective array antenna are fully explored. The broadband foldable reflective array antenna is suitable for microwave, millimeter wave, THz frequency ranges and applicable to high performance communication or radar systems.

Description

technical field

[0001] The invention belongs to the technical field of antennas, and in particular relates to a folded reflection array antenna with broadband characteristics. Background technique

[0002] High-gain array antennas play an increasingly important role in modern wireless communications, radar systems, and space exploration. Parabolic antenna and traditional phased array antenna are the two most popular antenna forms in this type of antenna. However, the bulky body of the parabolic antenna is not compact enough due to its non-planar structure, which seriously challenges the load capacity of the system under high integration requirements. However, the traditional phased array antenna restricts its application scope because of its expensive T / R components or complex feed network.

[0003] On this basis, the planar reflectarray antenna came into being. It is composed of a primary feed and a planar array. By controlling the size or rotation angle of each microstri...

Examples

Embodiment

[0031] figure 1 This is the overall side sectional view of the folded reflectarray antenna in this embodiment, which is composed of an initial feed horn 101 , a polarization selection grid 104 and a main array 103 composed of a large number of elements. The polarization selection grid plate 104 is a dielectric plate 105 printed with a plurality of parallel dipole microstrip units 106, the dielectric constant of the dielectric plate is 2.65, and the thickness is 6mm. The center lateral distance of the strip unit is Lj=1.6mm, and the width of a single dipole microstrip unit is wj=1mm. The polarization selection grid 104 can totally reflect the electric field parallel to the dipole and completely transmit the electric field perpendicular to it. The working principle of the antenna can be explained as follows: the polarization direction of the electric field radiated by the horn 101 is parallel to the dipole array, and is reflected onto the array surface 103. By reasonably contro...

technical field

[0001] The invention belongs to the technical field of antennas, and in particular relates to a folded reflection array antenna with broadband characteristics. Background technique

[0002] High-gain array antennas play an increasingly important role in modern wireless communications, radar systems, and space exploration. Parabolic antenna and traditional phased array antenna are the two most popular antenna forms in this type of antenna. However, the bulky body of the parabolic antenna is not compact enough due to its non-planar structure, which seriously challenges the load capacity of the system under high integration requirements. However, the traditional phased array antenna restricts its application scope because of its expensive T / R components or complex feed network.

[0003] On this basis, the planar reflectarray antenna came into being. It is composed of a primary feed and a planar array. By controlling the size or rotation angle of each microstri...

Examples

Embodiment

[0031] figure 1 This is the overall side sectional view of the folded reflectarray antenna in this embodiment, which is composed of an initial feed horn 101 , a polarization selection grid 104 and a main array 103 composed of a large number of elements. The polarization selection grid plate 104 is a dielectric plate 105 printed with a plurality of parallel dipole microstrip units 106, the dielectric constant of the dielectric plate is 2.65, and the thickness is 6mm. The center lateral distance of the strip unit is Lj=1.6mm, and the width of a single dipole microstrip unit is wj=1mm. The polarization selection grid 104 can totally reflect the electric field parallel to the dipole and completely transmit the electric field perpendicular to it. The working principle of the antenna can be explained as follows: the polarization direction of the electric field radiated by the horn 101 is parallel to the dipole array, and is reflected onto the array surface 103. By reasonably contro...

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