A low-profile planar dipole antenna suitable for 4g LTE communication

Abstract

The invention provides a low-profile planar dipole antenna suitable for 4G LTE communication. Traditional dual monopole antennas are deformed; the part between dipoles is similar to a radiation form of a Vivadi antenna; a reflecting back cavity is placed at the lower part of the planar dipole antenna; and a frequency selectivity surface reflecting plate is added between the reflecting back cavity and the planar dipole antenna. According to the low-profile planar dipole antenna suitable for 4G LTE communication, the antenna gain can be significantly improved when unidirectional radiation is achieved; the gain of the antenna at a high frequency is significantly improved; and the antenna keeps good beam convergence and relatively high gain, front-to-back ratio and cross polarization ratio characteristics within a 4G LTE communication band (700MHz-3200MHz).

Description

technical field [0001] The invention relates to the communication field, in particular to a linearly polarized planar dipole antenna applied to 4G mobile communication. Background technique [0002] As people's demand for mobile communication service capabilities is getting higher and higher, on the basis of conventional 2G and 3G, the quasi-4G LTE band has begun to be put into commercial use; from the perspective of operators, in order to save investment and consider how to follow up It has increasingly become a trend to achieve scalability, compatibility, multi-system, and multi-system coexistence. This also puts forward higher requirements for base station antennas. In order to meet the frequencies of different standards, ultra-wideband base station antennas such as 700, 1710, and 2690MHZ frequency bands have been widely proposed and applied; at the same time, the broadbandization of base station antennas also helps reduce mobile Communication equipment, reduce the numbe...

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Problems solved by technology

But its antenna standing wave cannot meet the 4G antenna bandwidth, and its maximum gain is lower in the high frequency band

[0005] Document 3 "T.G.Ma and S.K.Jeng, "A printed dipole antenna with tapered slotfeed for ultrawide-band applications," IEEE Trans. Antennas Propag., vol.53, no.11, pp.3833–3836, Nov.2005." The medium antenna transmits energy to two stacked microstrip patches through the SMA head and the microstrip line feed. The antenna bandwidth meets the requirements, but this method cannot guarantee the unidirectional radiation of the antenna, so the antenna gain is low

[0006] To sum up, the existing literature fails to propose a linearly polarized antenna that can effectively achieve higher gain and beam convergence in the case of wider bandwidth.

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