Antenna switching circuit and antenna system

Abstract

The embodiment of the invention relates to the technical field of communication, and discloses an antenna switching circuit and an antenna system. The antenna switching circuit comprises a switching module, a radio frequency module, a detection circuit, a first antenna and a second antenna, wherein the switching module is connected with the radio frequency signal end of the radio frequency module;the first radio frequency end of the switching module is electrically connected with the first antenna; the second radio frequency end of the switching module is electrically connected with the second antenna; the control end of the switching module is electrically connected with the output control end of the detection circuit; the detection end of the detection circuit is connected with the first antenna; if the first antenna is determined to be in a normal working state, the control end of the detection circuit outputs first level signals, and a radio frequency access end is connected and conducted with the first radio frequency end; and if the first antenna is determined to be in a short circuit or open circuit state, the control end of the detection circuit outputs second level signals, and the radio frequency access end is connected and conducted with the second radio frequency end. Thus, the state of a main antenna can be timely found out during an antenna working process, and the antenna can be switched.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to an antenna switching circuit and an antenna system. Background technique [0002] With the development of science and technology, communication technology has made rapid progress. In the field of wireless communication, the antenna has become an indispensable part. The antenna is not only an electronic component, but also a structural component. Under long-time work, how to keep the antenna in good performance and not cause communication interruption due to abnormal antenna is very important, especially in some applications that need to transmit data in real time. For example, the positioning antenna on a smart driving car is very important for vehicle position positioning and real-time data transmission. If the positioning antenna is abnormal, it will lead to inaccurate positioning. Real-time transmission of data through the positioning anten...

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Problems solved by technology

[0003] The inventors have found that there are at least the following problems in the prior art: in the existing antenna switching methods, a Microcontroller Unit (MCU) is generally used to control the switching of the antenna, but the MCU mainly sends out a control command when the signal cannot be obtained. Antenna switching. Although the MCU realizes the switching of the antenna, it cannot obtain the current status of the antenna. In addition, it takes a long time from the antenna communication abnormality to the MCU sending a control command to switch the antenna, which cannot achieve the purpose of immediate response and affects the user experience.

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