Radiation device and array antenna based on same

Abstract

The invention discloses a radiation device and an array antenna based on the radiation device. The low-frequency radiation device comprises a first low-frequency radiation module and a second low-frequency radiation module, wherein the first low-frequency radiation module is subjected to -45-degree polarization and the second low-frequency radiation module is subjected to +45-degree polarization; the first low-frequency radiation module and the second low-frequency radiation module are symmetrically, orthogonally and fixedly connected; and open circuit branches for preventing high-frequency electromagnetic waves from being transmitted in the low-frequency radiation device are respectively arranged at one sides of the axial centers of the first low-frequency radiation module and the second low-frequency radiation module. With the adoption of the radiation device and the array antenna, the abnormal-frequency interference can be reduced and the receiving-transmitting performance of the antenna is improved.

Description

technical field [0001] The invention relates to mobile communication base station antenna technology, in particular to a radiation device and an array antenna based on the radiation device. Background technique [0002] With the advancement of high technology and economic benefits, the communication industry has become one of the largest industries in China. The rapid development of mobile communication in the communication industry makes it play an increasingly important role in the daily life of users. As of the beginning of 2010, the number of mobile communication users in my country has exceeded 736 million, and more than one million base station antennas have been put into use. , Moreover, with the continuous increase of mobile communication services and types, the working frequency bands of various mobile communication systems are also continuously expanded, resulting in the continuous increase in the volume of the antenna, the increasingly complex structure, and the hi...

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Problems solved by technology

[0004] In the existing wireless system, the antenna mainly includes a miniaturized coaxial dual-frequency or multi-frequency antenna, which adopts a common microstrip structure or a half-wave radiation device structure, and a bowl-shaped combined radiation device or a microstrip radiation device and a half-wave symmetric radiation Considering the performance of the E plane pattern of the antenna (the distance between antenna radiation devices is preferably 0.7 to 0.95 working wavelengths), therefore, when performing dual-frequency or multi-frequency antenna arrays, the distance between the high and low frequency radiation devices of the antenna The distance is small, and even the radiation arm of the low-frequency radiation device may block the high-frequency radiation device, so that two kinds of vibrators (low-frequency radiation device and high-frequency radiation device) using ordinary microstrip structure or half-wave radiation device structure There is a strong electromagnetic coupling between them, causing the radiated electromagnetic waves to be seriously interfered by the other party (low-frequency radiation device or high-frequency radiation device), that is, inter-frequency interference, which reduces the transceiver performance of the antenna

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