Broadband dual polarized antenna unit

Abstract

The invention discloses a broadband dual polarized antenna unit, which comprises a radiator and a balanced feeding device, wherein the radiator consists of four radiation fins which are symmetric in pairs and are orthogonally distributed; the balanced feeding device consists of an excitation core wire and a balanced balun; the balanced balun is simultaneously formed into a support of each radiation fin; a symmetric radiation array is as long as a half of wavelength and is as wide as a quarter of the wavelength; each radiation fin further comprises a supporting area and a radiation area which are mutually adjacent; the two short sides and long sides of the radiation area and the two waists of the supporting area form a continuous curve; the ratio of the waist length of the supporting area to the length of the short side of the radiation area to the length of the long side of the radiation area is 1:1:2; and the two waists of each of the two adjacent radiation fins are arranged in parallel and are at an interval less than 0.1 wavelengths. The dual polarized antenna unit is a radiation oscillator which is relatively wider than the broadband and has good indexes, such as a standing-wave ratio and the like in a relatively wider bandwidth.

Description

[technical field] [0001] The invention relates to the field of mobile communication base station antennas, in particular to a broadband dual-polarization antenna. [technical background] [0002] Mobile communication is playing an increasingly important role in people's daily life. By the end of 2007, the number of mobile communication users in my country has exceeded 540 million, and more than 1 million base station antennas have been put into use. With the continuous increase of mobile communication services and types, the working frequency bands of various systems are also expanding. The working frequency of smart antenna in TD-SCDMA network is 1880-1920MHz, 2010-2025MHz, 2300-2400MHz. The communication frequency of DCS is 1710-1880MHz. The communication frequency of PCS is 1850-1990MHz. The communication frequency of UMTS is 1920-2170MHz. Part of the communication frequency band of WiMax (Worldwide Interoperability for Microwave Access) is 2300-2700MHz. Therefore, a ...

AI Technical Summary

Problems solved by technology

[0003] The relative frequency bandwidth of 1710-2400MHz exceeds 33%, and the relative frequency bandwidth of 1710-2700MHz is close to 45%. limit

In the existing design schemes of broadband oscillators, there are few relative bandwidths exceeding 45%. For example, the broadband oscillators described in patent No. ZL200820122837.3, CN 201174423Y, CN 101465475A, etc., have a relative bandwidth of only about 33%.

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