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A tunable antenna

A technology for tuning antennas and antennas, applied in resonant antennas, antennas, antenna coupling, etc., can solve problems such as antenna performance degradation, user call quality impact, etc., to achieve stable performance, eliminate VSWR offset, and good radiation efficiency Effect

Active Publication Date: 2022-04-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the specific operation, the debugging of the antenna is based on the situation that the USB is in an empty state; when the USB cable is plugged in, the standing wave ratio of the antenna will still change greatly, and the performance of the antenna will also change accordingly; The wave ratio offset and the digital interference brought by the USB cable will make the antenna performance drop sharply and have a great impact on the user's actual call quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0035] When the antenna body 1 is in a non-USB plug-in state, the antenna body 1 is connected to the radio frequency channel of the main board 9 through the signal line 2, and the first ground signal 3 is connected to the tuning switch circuit 7 through the wiring 5; wherein, the tuning switch circuit 7 is provided with a single pole Multi-throw switch, and hit the switch to a port.

[0036] When the control circuit 8 detects that the USB cable 11 is plugged in, the switch in the tuning switch circuit 7 disconnects the connection with the a port, hits the b port, and establishes a connection with the b port; wherein, the a port and the b port are given different The specific value is determined by debugging the return loss RL of the antenna body 1.

[0037] When the antenna body 1 is not inserted into the USB cable, the antenna body 1 can work in different frequency bands; for example, LTEB5, LTEB2, LTEB12 and other frequency bands; wherein, the first ground signal 3 of the an...

no. 2 Embodiment

[0039] When the antenna body 1 is in the non-USB plug-in state, the antenna body 1 is connected to the radio frequency channel on the main board 9 through the signal line 2, the first ground signal 3 is connected to the tuning switch circuit 7 through the wiring 3, and the second ground signal 4 is directly connected to the tuning switch circuit 7 through the wiring 6. Connected to the ground wire on the main board 9, the first ground signal 3 and the second ground signal 4 are both in working state; wherein, a single-pole multi-throw switch is arranged in the tuning switch circuit 7, and the switch is switched to the a port.

[0040]When the control circuit 8 detects that the USB cable is plugged in, the switch of the tuning switch circuit 7 is disconnected from the a port, and disconnected from the first ground signal 3 of the antenna body 1; the first ground signal 3 is in a non-working state, and the second ground signal 3 is in a non-working state. Signal 4 is active. Bas...

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Abstract

This paper discloses a tunable antenna, which includes a main board and an antenna body; a first connection structure and a second connection structure are arranged between the antenna body and the main board, and when the USB cable is not inserted, the antenna body passes through the The first connecting structure is connected to the main board; when the USB cable is inserted, the antenna body is connected to the main board through the second connecting structure; this application relates to but not limited to the field of wireless technology, and the application of this application can effectively overcome The defects of the antenna body can eliminate the VSWR shift of the antenna body caused by the USB wired insertion; the antenna state and performance can be kept stable, and the antenna body can be plugged in with the USB cable or without the USB cable. It has better radiation efficiency.

Description

technical field [0001] This application relates to but not limited to the field of wireless technology, especially a tunable antenna. Background technique [0002] In the prior art, more and more mobile phone projects set the USB device at the bottom; at the same time, the antenna of the mobile phone is usually set at the bottom; with the wide application of the USB TYPE-C interface, the design of the antenna adjacent to the USB And the influence of the antenna performance will be more and more large. In order to optimize the setting of the antenna module and the USB module, the current common practice is to use the outer metal part of the USB as a part of the antenna, or as a part of the radiator, or as an antenna on the housing and connected to the antenna on the PCB. or set the antenna to avoid the USB. Based on the limited space of the antenna and the sensitivity of the antenna performance to the distance between the antenna and the USB, the above settings cannot achiev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/52H01Q1/24H01Q1/50
CPCH01Q1/243H01Q1/50H01Q1/52H01Q9/42H01Q23/00H01Q5/378H01Q1/2283
Inventor 李群
Owner ZTE CORP