High-isolation semi-groove slot antenna array

Abstract

The invention discloses a high-isolation semi-groove slot antenna array, and relates to a multiple-input-multiple-output antenna. The antenna array consists of three semi-groove slot antennas which are placed together and are pairwise orthogonal in radiating polarization directions, wherein each semi-groove slot antenna consists of a microstrip feeder line on a medium substrate, and a metal ground surface; a radiating semi-groove slot and a plurality of isolation slots are formed in each metal ground surface; the radiating semi-groove slots are rectangular; one end of each radiating semi-groove slot is short-circuit; the other end of each radiating semi-groove slot is open-circuit; the isolation slots around the radiating semi-groove slots are mutually parallel; long side directions of the radiating semi-groove slots are perpendicular to long side directions of the isolation slots; the resonant frequency of the isolation slot is lower than the working frequency of the antennas; one end of each microstrip feeder line is an input-output port of each antenna; and metal short-circuit pins are arranged at the tail ends of microstrip feeder line conduction bands at the other ends of the microstrip feeder lines, and connect the conduction bands and the metal ground surfaces on the edges of the radiating semi-groove slots. The antenna array can effectively reduce adverse effects of the metal ground surfaces on shielding and isolation of normal radiation of the antennas.

Description

technical field [0001] The invention relates to a microwave antenna, in particular to a high-isolation half-slot slot antenna array. Background technique [0002] Multiple-input multiple-output (MIMO) technology is an effective technology for improving information transmission capacity. Multi-polarization MIMO is a commonly used technology. The antenna array of a multi-polarization MIMO system has two or more unit antennas to form an antenna These element antennas have mutually orthogonal radiation polarization directions. In order to ensure better channel isolation, it is required that these element antennas with different polarization directions have better isolation. Common slot antennas can be used to form antenna arrays for multi-polarization MIMO, but the isolation of these antenna arrays is not very high. [0003] Since the metal ground plane of the slot antenna can induce currents in multiple directions, the radiation of these currents will cause a decrease in the i...

AI Technical Summary

Problems solved by technology

Common slot antennas can be used to form antenna arrays for multi-polarization MIMO, but the isolation of these antenna arrays is not very high

[0003] Since the metal ground plane of the slot antenna can induce currents in multiple directions, the radiation of these currents will cause a decrease in the isolation between the antennas. When antennas with different polarization directions are co-located at one place, due to the The closer the distance, the stronger the mutual induction current, making the problem of antenna isolation more serious; in addition, when antennas with different radiation polarization directions are co-located, the shielding of the metal ground plane of one antenna to the radiation field of the other antenna will The directivity of another antenna is affected, especially the radiation characteristics of the blocked direction will be deteriorated

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