Multimode multi-frequency combined antenna and GNSS receiver

Abstract

The present invention relates to a multimode multi-frequency combined antenna and a GNSS receiver. The multimode multi-frequency combined antenna includes a first shielding cover, a GNSS radio frequency board, a GNSS antenna, a bracket, a network main antenna, a network diversity antenna, and two WIFI Bluetooth antennas. For the multimode multi-frequency combined antenna described above, an integrated design idea is used, an optimized design layout is reasonable, clearing of an antenna area is reasonable, network main antenna and diversity antenna are separated from each other, WIFI Bluetoothantennas are separated from each other and are diagonally placed, and a physical distance is increased. In this way, not only isolation is improved, but also phase center stability of the GNSS antennacan be ensured, and a phase error caused by geometric asymmetry of the GNSS antenna is reduced. In addition, a reasonable structural design can ensure effective reception and transmitting of satellite signals, network signals, and WIFI Bluetooth signals with high-precision. In addition, the network antenna is compatible with the main diversity antenna, and a signal received by the antenna in a position in which the spatial signal is stronger is fully utilized, a signal to noise ratio is higher, and signal transmission quality is better.

Description

technical field [0001] The invention relates to a receiver, in particular to a multi-mode and multi-frequency combination antenna and a GNSS receiver. Background technique [0002] The commonly used measurement method for GNSS (Global Navigation Satellite System) receivers is real-time kinematic (RTK), which is a real-time dynamic positioning and measurement technology based on carrier phase observations. RTK technology provides real-time three-dimensional positioning results of station points in a specified coordinate system, and achieves millimeter-level accuracy. As the most mainstream satellite navigation technology measurement application product at present, GNSS receivers are increasingly widely used in modern surveying and mapping, transportation, public safety, rescue, modern agriculture and other fields. [0003] Traditional GNSS receivers mostly use aluminum-magnesium alloy metal shells, which have high requirements for antenna design. 2G / 3G / 4G network antennas ar...

AI Technical Summary

Problems solved by technology

[0003] Traditional GNSS receivers mostly use aluminum-magnesium alloy metal shells, which have high requirements for antenna design. 2G / 3G / 4G network antennas are not easy to build in. WIFI and Bluetooth communication antenna devices are built into the receiver, and the radio frequency performance is often affected by the receiver. The structure or module of the host computer and the metal shell of the receiver lead to poor communication quality and short communication distance. In severe cases, it is even passively affected by the electromagnetic interference of the host computer and cannot work normally, etc.

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