Low-profile miniaturized vehicle-mounted antenna based on filtering oscillators and capable of realizing high pilot frequency isolation

Abstract

The invention discloses a low-profile miniaturized vehicle-mounted antenna based on filtering oscillators and capable of realizing high pilot frequency isolation. The antenna comprises a first antenna, a second antenna and a third antenna, wherein the first antenna comprises a vertically polarized low-frequency oscillator, the second antenna adopts a vertically polarized high-frequency oscillator,the third antenna is a horizontally polarized antenna covering high and low frequency, and the vertically polarized first and second antennas and the horizontally polarized third antenna constitute adual-frequency dual-polarized antenna; a filtering feed structure for suppressing higher harmonic of the first antenna in the broadband range is arranged on the first antenna. The filtering feed structure can realize higher harmonic suppression of the first antenna 1.7-2.7 GHz, an extra filtering circuit is not required, and insertion loss caused by a traditional filter cascade method is avoided.The vertically polarized first and second antennas and the horizontally polarized third antenna constitute a dual-frequency dual-polarized antenna to complement one another, and complete coverage ofsignals is realized.

Description

technical field The invention relates to the field of antenna research in the field of wireless mobile communication, in particular to a low-profile miniaturized vehicle-mounted antenna with high frequency isolation based on a filter oscillator. Background technique In modern society, mobile communication, as an important foundation of information technology industries such as Internet of Things and mobile Internet, is closely related to our daily life. With the development of mobile communication, the number of mobile communication standards and communication frequency bands is increasing day by day. As a terminal for sending and receiving information in the mobile communication system, the performance of the antenna will largely affect the work of the entire communication system equipment. However, in practical applications, due to the limited space left by communication equipment for antennas, it is necessary to integrate antennas of different frequency bands. In a limi...

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Problems solved by technology

However, this method increases the size and complexity of the antenna on the one hand, and on the other hand introduces a large insertion loss

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