An all-metal dual-polarized aperture waveguide antenna

Abstract

The invention discloses an all-metal dual-polarized aperture waveguide antenna, which adopts a novel SSPPs excitation structure and excitation method, so that the method of loading the aperture waveguide antenna with SSPPs is changed; this loading method simplifies the processing method and reduces the Processing costs, making dual polarized loading more convenient. All the structures in the present invention are made of metal material, no medium is needed, and dielectric loss is avoided. The present invention adopts a new type of SSPPs loading method, which hardly changes the impedance characteristics of the open waveguide, so the impedance bandwidth of the antenna is very wide and can cover the entire Ka band, and the structure is symmetrical, so it can support dual-linear polarization radiation or dual Circularly polarized radiation; on the basis of dual linear polarization, dual circularly polarized radiation can be realized by adding a circular polarizer at the input end of the square waveguide.

Description

technical field [0001] The invention belongs to the field of antennas, and in particular relates to an all-metal dual-polarized aperture waveguide antenna. Background technique [0002] The commonly used aperture waveguide antenna cannot be used directly due to its small radiation aperture, low gain and wide lobe. Can only be used in special scenarios that require a wide beam. Slotted waveguide antenna arrays can improve gain, but the feed network is complex and bulky, increasing cost and bulk. [0003] At present, the commonly used metal horn antenna has the disadvantages of large size and heavy weight because the method of increasing the gain is to simply increase the size of the antenna. Generally speaking, the horn needs a gradient structure of inclined plane, and machining is also more difficult. [0004] At present, the commonly used dielectric rod-loaded aperture waveguide antenna is not as strong as an integrated metal structure due to the need to load a dielectri...

AI Technical Summary

Problems solved by technology

The millimeter-wave and higher-frequency antennas are generally processed by PCB technology, and it is difficult to achieve dual-polarized radiation

[0007] To sum up, the currently commonly used aperture waveguide antennas are generally only used for test and measurement, and the application scenarios are single; although the metal horn antenna has high gain and wide bandwidth, its structure is bulky; the current dielectric rod-loaded aperture waveguide antenna has excellent performance. However, the dielectric loss is high, the processing is difficult, the cost is high, and the structural strength of the antenna is difficult to guarantee; the current substrate-integrated waveguide opening waveguide and horn antenna are compact in structure, but the bandwidth is narrow, dual polarization is difficult to achieve, and the loss is high. ; Current Yagi antennas and log-periodic end-fire antennas are difficult to achieve dual-polarized radiation in the mm-wave band

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