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Tunable antenna

A technology for tuning antennas and antennas, which can be applied to resonant antennas, antennas, antenna coupling and other directions, and can solve problems such as the impact of user call quality and antenna performance degradation.

Active Publication Date: 2017-11-28
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 port a.

[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 is 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 Signal 4 is active. Based on the above state ch...

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PUM

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Abstract

The invention discloses an tunable antenna. The tunable antenna has a main board and an antenna main body; a first connection structure and a second connection structure are arranged between the antenna main body and the main board; when the USB line is not plugged, the antenna main body is connected to the main board through first connection structure; and when the USB line is plugged, the antenna main body is connected to the main board through the second connection structure. The tunable antenna is not limited to the wireless technology field and can effectively overcome defects in the prior art and can eliminate an offset of a standing-wave ratio of the antenna main body when the USB line is plugged in, can realize the antenna state and maintain performance stable, can make the antenna main body have better radiation efficiency w in states of plugging the USB line and no plugging the USB line.

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