High-gain and low-profile vehicle-mounted antenna

Abstract

The invention discloses a high-gain and low-profile vehicle-mounted antenna, which comprises a metal parabolic reflector, a first antenna, a second antenna and a third antenna, wherein the first antenna, the second antenna and the third antenna are arranged in the metal parabolic reflector; the metal parabolic reflector is arranged at the top of a vehicle; the first antenna is arranged at a focus position in the metal parabolic reflector; the second antenna comprises a horizontally polarized antenna; and the third antenna comprises two vertically polarized printed monopole antenna units, a power distributor and a neutral line structure connected with the two antenna units. Significant gain improvement is achieved by the first antenna and the second antenna through the metal parabolic reflector; control in a radiation direction and gain improvement in a horizontal direction are achieved by the third antenna through forming a small array; and the profile of the whole antenna is low.

Description

technical field [0001] The invention relates to the field of wireless mobile communication, in particular to a vehicle-mounted antenna with high gain and low profile. Background technique [0002] In recent years, with the rapid development of the telecommunications industry, the communication signaling interaction of various network communication standards of various operators has become increasingly intensive, which is highly dense in the time domain and seriously overlapped in the frequency domain. higher requirements. The antenna is an important part of the mobile communication device, which greatly affects the performance of the entire communication device. For example, the vehicle-mounted direction-finding system generally uses an external antenna. Due to the particularity of its equipment, the requirements for gain are relatively high, which are different from the general antennas used in mobile communication frequency bands. Common shark fin antennas or whip antenn...

AI Technical Summary

Problems solved by technology

[0003] In addition, the working environment of the external antenna on the vehicle is generally the roof, and the reflection effect of the metal roof will make the radiation pattern deviate from the horizontal direction, resulting in low gain in the horizontal direction

The existing vehicle-mounted external antennas are generally single-polarized omnidirectional radiation antennas, or single-polarized directional radiation antennas, and generally there are signal blind spots on the vertical plane

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