Broadband Quari-Yagi antenna applied to multi-band frequency wireless communication system

Abstract

The invention provides a broadband Quari-Yagi antenna applied to a multi-band frequency wireless communication system. The broadband Quari-Yagi antenna comprises a dielectric substrate, a metal earth plate, a SMA connector, metal symmetrical dipoles, a metal impedance transition line, a metal director dipole and a metal impedance matching branch. The metal earth plate covers the dielectric substrate and is connected with the metal impedance transition line. The SMA connector is arranged on one side of the metal earth plate and is connected with the metal impedance transition line. Two pairs of metal symmetrical dipoles are respectively connected with the metal impedance transition line and cover the two faces of the dielectric substrate. The metal impedance matching branch is arranged between the metal earth plate and the metal symmetrical dipoles, and the metal impedance matching branch is connected to the metal impedance transition line. The metal director dipole is arranged on the rear portion of the metal symmetrical dipoles. The broadband Quari-Yagi antenna can be applied to the integrated multi-band frequency wireless communication system, an operation bandwidth can cover all communication frequency bands within 1.7GHz-4.1GHz, and the characteristics of good gains and directional diagrams are achieved.

Description

technical field [0001] The invention relates to a broadband quasi-Yagi antenna applied to a multi-band wireless communication system. The working frequency band of the antenna is (1.7GHz-4.1GHz), and can be used for DCS wireless network, WLAN (wireless local area network), and LTE which is currently under continuous development. in the communication system. At the same time, the antenna also covers the WIMAX communication frequency band. Background technique [0002] DCS1800 (Digital cellular system) is a digital cellular system with a working frequency range of 1710MHz to 1880MHz. The development of my country's mobile communication is extremely rapid. On the one hand, due to the limitation of frequency resources, some areas have experienced frequency resource shortages, insufficient channels, and excessive traffic density; on the other hand, technologies such as multiple frequency reuse, multi-layer coverage, and frequency hopping To increase capacity, there are also many...

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Problems solved by technology

[0005] Antenna is the front end of receiving and transmitting equipment. With the rapid development of wireless communication technology, the requirements for it are getting higher and higher. Antennas are required to be highly integrated, low-profile, and meet the needs of multiple wireless communication systems in different frequency bands. Integration requirements, while the current general communication antennas only meet the communication in a single frequency band, in order to work in multiple frequency bands for the communication system, multiple antennas must be used in combination, which causes the complexity of the system and increases the cost of the equipment

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