Antenna housing for reducing minor lobe level by using artificial structure material

Abstract

The invention discloses an antenna housing for reducing minor lobe level by using an artificial structure material. 2ni columns and mj rows of annular slot unit structures are printed on a single-face copper-clad microwave dielectric plate in the transverse direction and the longitudinal direction respectively, wherein the transversely arranged annular slot unit structures have similar structure appearances and different sizes and are symmetrically distributed along the transverse central axis of the antenna housing; the longitudinally arranged annular slot unit structures are completely the same; and chip resistors are transversely, symmetrically and additionally arranged in each annular slot structure. By rationally selecting the resistance size of the resistors and designing the size of unit structures of the artificial structure material, electromagnetic wave has different transmittance rates and the same transmission phase through each columns of structures, so that the aim of reducing the minor lobe level of the antenna is fulfilled; and the structure has the advantages of simple design, light weight and low cost.

Description

Technical field

[0001] The invention relates to a radome, in particular to a radome which uses artificial structural materials to reduce the sidelobe level. Background technique

[0002] The sidelobe level is an important indicator to measure the performance of the array antenna. The lower sidelobe level can effectively reduce the mutual interference of electromagnetic waves radiated by the array antenna, improve the signal capture efficiency, and improve the signal-to-noise ratio. Therefore, how to achieve a lower sidelobe level has always been a concern of researchers. There are mainly two common design methods for low sidelobe level array antennas: optimizing the power ratio of the radiation source and improving the shape of the antenna unit. By optimizing the power ratio of the radiation source through simulated annealing, genetic algorithm, weighting algorithm, etc., the sidelobe level can be effectively controlled. At the same time, the antenna sidelobe level can be redu...

Examples

Embodiment Construction

[0020] Such as figure 1 As shown, in order to make such a radome that uses artificial structural materials to reduce the sidelobe level, a single-sided copper-clad microwave dielectric plate printed with annular slits is used, and two chip resistors R are added symmetrically along the transverse direction. In the xyz coordinate system, k is the direction of the incident wave along the z axis, E is the direction of the electric field along the x axis, and H is the direction of the magnetic field along the y axis. Where P represents the unit period, r represents the radius of the outer ring, w represents the width of the annular gap, t represents the thickness of the dielectric plate, and R represents the chip resistance.

[0021] figure 2 A schematic diagram of the overall structure of the radome designed for the invention. Print 2n on the single-sided copper-clad microwave dielectric board 1, respectively i Column×m j Row ring-shaped gap structure 2, of which 2n i Columns of ann...

Technical field

[0001] The invention relates to a radome, in particular to a radome which uses artificial structural materials to reduce the sidelobe level. Background technique

[0002] The sidelobe level is an important indicator to measure the performance of the array antenna. The lower sidelobe level can effectively reduce the mutual interference of electromagnetic waves radiated by the array antenna, improve the signal capture efficiency, and improve the signal-to-noise ratio. Therefore, how to achieve a lower sidelobe level has always been a concern of researchers. There are mainly two common design methods for low sidelobe level array antennas: optimizing the power ratio of the radiation source and improving the shape of the antenna unit. By optimizing the power ratio of the radiation source through simulated annealing, genetic algorithm, weighting algorithm, etc., the sidelobe level can be effectively controlled. At the same time, the antenna sidelobe level can be redu...

Examples

Embodiment Construction

[0020] Such as figure 1 As shown, in order to make such a radome that uses artificial structural materials to reduce the sidelobe level, a single-sided copper-clad microwave dielectric plate printed with annular slits is used, and two chip resistors R are added symmetrically along the transverse direction. In the xyz coordinate system, k is the direction of the incident wave along the z axis, E is the direction of the electric field along the x axis, and H is the direction of the magnetic field along the y axis. Where P represents the unit period, r represents the radius of the outer ring, w represents the width of the annular gap, t represents the thickness of the dielectric plate, and R represents the chip resistance.

[0021] figure 2 A schematic diagram of the overall structure of the radome designed for the invention. Print 2n on the single-sided copper-clad microwave dielectric board 1, respectively i Column×m j Row ring-shaped gap structure 2, of which 2n i Columns of ann...

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