A multi-frequency miniaturized handheld antenna

Abstract

The invention discloses a multi-frequency miniaturized handset antenna comprising a metal bottom plate and a feed circuit board. The multi-frequency miniaturized handset antenna is characterized in that a lower ceramic antenna, a middle ceramic antenna and an upper ceramic antenna are arranged on the circuit board sequentially from bottom to top; the feed circuit board is equipped with a phase-shifting network, a feed hole position and a joint installation position respectively corresponding to the lower ceramic antenna, the middle ceramic antenna and the upper ceramic antenna; a lower medium is 3-5mm thick, and is an aluminum oxide ceramic medium with the dielectric constant of 9.8; a middle medium 17 is 3-6mm thick, and is a ceramic medium with the dielectric constant of 13-17; and an upper medium is 2-4mm thick, and is an aluminum oxide medium with the dielectric constant of 9.8. The multi-frequency miniaturized handset antenna of the invention has a simple structure, can simultaneously receive satellite navigation signals of multiple frequency bands, is compact and firm in structure, and has good standing-wave ratio, circular polarization axial ratio and bottom elevation gain performance at each frequency band.

Description

technical field [0001] The present invention relates to the technical field of antennas, in particular to a miniaturized handheld antenna. Background technique [0002] As we all know, the satellite navigation system is a system that is beneficial to artificial earth satellites for radio navigation. Its basic function is to provide accurate and continuous information such as position, speed and time to various users in real time, and then complete the navigation, positioning, monitoring and management of the target. Due to its high precision, all-weather and real-time characteristics, satellite navigation systems are widely used in military and civilian fields, and are playing an increasingly important role. [0003] The miniaturized navigation antenna is a research hotspot of various foreign satellite navigation antenna manufacturers in recent years, and the multi-mode and multi-frequency GNSS receiver equipped by it is a major trend in the development of satellite navigat...

AI Technical Summary

Problems solved by technology

[0005] The currently widely used satellite navigation antennas generally work at a single frequency. In order to achieve multi-frequency work, the technical approach often used is the multi-antenna combination method, that is, to combine multiple single-frequency antennas together, and adopt a horizontal layout in the same plane in terms of spatial layout. , this method not only increases the size of the antenna but also cannot guarantee the low-elevation gain performance of the antenna in terms of electrical performance, it will also cause the antenna radiation direction to be skewed, and the electromagnetic coupling between the antennas will increase, thereby reducing the performance of the antenna, especially Antennas with close operating frequencies interfere with each other more seriously. In actual use, satellite signals are often not received well, and even terminal equipment cannot work normally.

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