Millimeter wave dual-polarization near-field measurement probe

Abstract

The invention discloses a millimeter wave dual-polarization near-field measuring probe comprising a gradual change circular waveguide with the caliber gradually increasing in an opening direction, a straight circular waveguide arranged at the starting end of the gradual change circular waveguide and extending in the direction opposite to the opening direction, a short circuit plate arranged at theend of the straight circular waveguide, and four ridge pieces arranged in the two sections of circular waveguide and distributed in a crossed mode. Two feed connectors perpendicular to each other areconnected to the outer portion of the straight circular waveguide and feed the two pairs of ridge pieces respectively to realize vertical / horizontal dual polarization of the antenna. According to theinvention, the circular waveguide composed of the gradual change circular waveguide and the straight circular waveguide is adopted; four ridge pieces which are distributed in a cross shape are arranged in the two sections of circular waveguides, optimization processing is conducted on the four ridge pieces, arc processing is conducted on the open-circuit ends of the waveguides, so that the diffraction effect generated by transmission of electromagnetic waves to a free space between ridges is reduced, and then the performance of a directional diagram is guaranteed. Meanwhile, step processing is adopted at the short-circuit end, and return loss matching can be adjusted by adjusting parameters of steps.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a millimeter-wave dual-polarization near-field measurement probe of a multi-probe spherical near-field measurement system. Background technique [0002] With the advancement of mobile communication technology and the arrival of 5G, massive MIMO has become an important supporting technology in the 5G era. However, large-scale antenna arrays bring great challenges to measurement, and traditional test and measurement methods are not suitable for 5G millimeter wave testing. Therefore, a test system that uses the OTA (Over The Air) radiation test method to analyze device characteristics has become a new hope for 5G millimeter wave test and measurement. At present, there are three main test methods for MIMO OTA: multi-probe near-field measurement method, reverberation chamber method and radiation two-step method. [0003] Multi-probe near-field measurement technology is one of t...

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Problems solved by technology

[0006] Aiming at the design and performance problems of existing probes in the millimeter wave frequency band, the purpose of the present invention is to provide a dual-polarization near-field measurement with wide frequency band, low cross-polarization, simple feeding, and stable pattern The probe can improve the measurement accuracy and efficiency in the 5G millimeter wave MIMO OTA test

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