WO2012083802A1

WO2012083802A1 - Detection device and method for detecting external connection of radio frequency interface

Info

Publication number: WO2012083802A1
Application number: PCT/CN2011/083861
Authority: WO
Inventors: 戚捷; 屠东兴; 帅培华
Original assignee: 华为终端有限公司
Priority date: 2010-12-24
Filing date: 2011-12-13
Publication date: 2012-06-28
Also published as: CN102141593A; CN102141593B

Abstract

Embodiments of the present invention provide a detection device and method for detecting external connection of a radio frequency interface. The device comprises: a radio frequency switch connector and a detection circuit connected to the radio frequency switch connector. The detection circuit is configured to output a high level or a low level at a detection port of the detection circuit according to the insertion state of an external radio frequency plug with respect to the radio frequency switch connector. Through the embodiments of the present invention, the detection circuit converts the inserted state or non-inserted state of the external radio frequency plug into a direct current level and outputs the direct current level, so that it is convenient to detect an insertion state of the radio frequency switch connector.

Description

The invention relates to a detection device and method for detecting an external connection of a radio frequency interface. The present application claims to be submitted to the Chinese Patent Office on December 24, 2010, the application number is 201010604391.X, and the invention name is "detection device for detecting an external connection of a radio frequency interface and The priority of the Chinese Patent Application, the entire disclosure of which is hereby incorporated by reference. Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a detecting apparatus and method for detecting an external connection of a radio frequency interface.

Background technique

At present, many communication devices (especially wireless terminal devices) use RF switch connectors to connect with external devices through RF signals. The RF switch connector is a connector for connecting an external RF cable and is a mechanical switch structure. When an external RF plug is inserted into the RF switch connector, the RF signal is connected to the external device. When no external RF plug is inserted into the RF switch connector, the RF signal is connected between the two ports of the RF switch connector.

Figure 1 is a schematic diagram of the RF switch connector without an external RF plug inserted. As shown in Figure 1, the RF signal between Port A and Port B is connected when no external RF plug is inserted. Figure 2 is a schematic diagram of an external RF plug inserted in the RF switch connector. As shown in Figure 2, when an external RF plug is inserted, the RF signal is connected to the external device, and the two ports A and B of the RF switch connector are disconnected. At this time, the RF signals at both ends of the AC are connected. AB is disconnected at both ends.

In the process of implementing the present invention, the inventors have found that it is necessary to detect the insertion state of the RF switch connector of the communication device to control the operation of other parts of the communication device or other devices according to the detected state of insertion or non-insertion. It is therefore desirable to provide a means for detecting the insertion state of the RF switch connector. Summary of the invention

Embodiments of the present invention provide a detecting apparatus and method for detecting an external connection of a radio frequency interface, for detecting an insertion state of a radio frequency switch connector.

The embodiment of the invention provides a detecting device for detecting an external connection of a radio frequency interface, comprising: a radio frequency switch connector and a detecting circuit connected to the radio frequency switch connector;

The detecting circuit is configured to output a high level or a low level at a detecting port of the detecting circuit according to a state in which an external RF plug is inserted in the RF switch connector.

The embodiment of the present invention provides a method for detecting an extrapolation connection of a radio frequency interface, which is detected by using any detection device for detecting an extrapolation connection of a radio frequency interface according to an embodiment of the present invention, according to an output level of the detection port. , Determine whether the RF interface is plugged into an external RF plug.

The detecting device and method for detecting an external connection of a radio frequency interface according to an embodiment of the present invention convert a state in which an external radio frequency plug is inserted or not inserted into a DC level output through a detecting circuit, so as to facilitate detection of an insertion state of the RF switch connector. . DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, the attached in the following description The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a schematic diagram of an RF switch connector without an external RF plug inserted therein;

2 is a schematic diagram of an external RF plug inserted in the RF switch connector;

3 is a schematic diagram of Embodiment 1 of a detecting apparatus for detecting an external connection of a radio frequency interface according to the present invention;

4A is a schematic diagram of an unplugged state of a second embodiment of a detecting apparatus for detecting an external connection of a radio frequency interface according to the present invention;

4B is a second embodiment of a detecting device for detecting an external connection of a radio frequency interface according to the present invention; Schematic diagram of state

5A is a schematic diagram of a third embodiment of the detecting device for detecting an external connection of a radio frequency interface in an uninserted state;

FIG. 5B is a schematic diagram of the third embodiment of the detecting apparatus for detecting an extrapolation connection of a radio frequency interface according to the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

3 is a schematic diagram of Embodiment 1 of a detecting apparatus for detecting an external connection of a radio frequency interface. As shown in FIG. 3, the apparatus includes: an RF switch connector 31 and a detecting circuit 33; wherein the detecting circuit 33 is connected to the RF switch The device 31 is connected.

The RF switch connector 31 is a mechanical switch structure and is a connector for connecting an external RF plug.

The detecting circuit 33 is for outputting a high level or a low level at the detecting port of the detecting circuit 33 in accordance with the state in which the external RF plug is inserted in the RF switch connector 31.

When the external RF plug is not inserted into the RF switch connector 31, the external RF cable C is not connected to the A point and the B point, and the A and B points in the RF switch connector are electrically connected, and the detection port of the detection circuit 33 is detected at this time. Output high level (or low level); When the external RF plug is inserted into the RF switch connector 31, the external RF cable C is electrically connected to the point A in the RF switch connector 31 through the external RF plug, and the external RF cable C is connected. Disconnected from point B in the RF switch connector 33, and point A and point B are disconnected, at which time the detection port of the detection circuit 33 outputs a low level (or a high level). That is, depending on the specific structure of the detection circuit, the RF switch connector 31 is inserted or When the external RF plug is not inserted, the level of the detection port output of the detection circuit is different. According to the level of the output level, it can be determined whether an external RF plug is inserted in the RF switch connector.

The RF switch connector in this embodiment can be applied to various scenarios, for example: for a wireless transceiver with a built-in antenna to connect an external antenna. In this application scenario, point A in FIG. 3 is connected to the front end of the radio transceiver. Point B is connected to the built-in antenna of the wireless transceiver, and point C is connected to the external antenna. When the external RF plug is not inserted, the front end of the RF transceiver is connected to the built-in antenna of the wireless transceiver itself; when the external RF plug connected to the external antenna is inserted into the RF After the switch connector is connected, the front end of the RF transceiver is connected to the external antenna and disconnected from the built-in antenna of the wireless transceiver itself. In addition, the RF switch connector can also be applied to the extraction of other RF signals in the wireless transceiver. The built-in antenna is an antenna form of a wireless transceiver, characterized by being built in a wireless transceiver device; the external antenna is an antenna form of a wireless transceiver, characterized by being placed outside the wireless transceiver device, through a radio frequency connector and The wireless transceiver device is connected.

After detecting whether an external RF plug is inserted in the RF switch connector, the operation of other parts of the communication device or other devices may be controlled according to the detection result, for example: According to the insertion state detection result of the external RF connector, the terminal device may pass Indication (signal light or HMI reminder, etc.) to inform the user whether there is an external antenna inserted to avoid hardware damage caused by user misoperation (such as opening the RF transceiver) without the antenna connection (port mismatch); or, terminal The device can identify whether it is currently in a wireless connection state according to the detection result. For example, in the wireless connection state, the wireless transmission power is controlled according to the difference in physical performance of the antenna at different frequency points, so that it is flat in each frequency band, and some frequencies are corrected at the same time. The point power is too large to reduce the power consumption of the whole machine and reduce the heat of the whole machine.

In the embodiment of the invention, the state in which the external RF plug is inserted or not inserted is converted into a DC level output by the detecting circuit to facilitate detecting the insertion state of the RF switch connector.

4A is a schematic diagram of a second embodiment of a detecting device for detecting an extrapolation connection of a radio frequency interface according to the present invention, and FIG. 4B is a schematic diagram of a detecting device for detecting an extrapolation connection of a radio frequency interface according to the present invention; 2 is a schematic diagram of an insertion state; as shown in FIG. 4A and FIG. 4B, on the basis of the device embodiment 1, the detection circuit 33 in the device includes a first detecting unit 40.

The first detecting unit 40 is configured to output a high level in the detecting port of the detecting circuit 33 when the external RF plug is inserted in the RF switch connector 31, and when the external RF plug is not inserted in the RF switch connector 31, in the detecting circuit The first detection port outputs a low level.

The first detecting unit 40 may specifically include: a first capacitor 41, a first inductor 43, a second inductor 45, a first resistor 47, a first pull-up voltage port 49, and a first detecting port 42.

The first end of the first capacitor 41 is electrically connected to the front end of the external RF transceiver, and the second end of the first capacitor 41 is electrically connected to the first end of the RF switch connector 31 and the first end of the first inductor 43 respectively.

The second end of the first inductor 43 is grounded.

The first end of the second inductor 45 is electrically connected to the second end of the RF switch connector 31, and the second end of the second inductor 45 is electrically connected to the first end of the first resistor 47 and the first detecting port 44, respectively.

The second end of the first resistor 47 is electrically coupled to the first pull-up voltage port 49.

The first end of the RF switch connector 31 is one end connected to the external RF plug when the external RF plug is inserted.

The capacitors used in this embodiment are DC blocking capacitors. The inductors used in this embodiment are DC blocking inductors.

In this embodiment, the topology of the detection circuit is changed by the difference of the connection state of the self-port by the RF switch connector when the external RF plug is inserted, so that the voltage of the detection port of the detection circuit also changes, thereby detecting the external RF plug. Whether to insert the purpose; at the same time, the blocking circuit uses a DC blocking capacitor and a blocking inductor to ensure isolation between the DC and high frequency circuits.

In another embodiment of the embodiment, the first detecting unit may further include a second capacitor 44. The first end of the second capacitor 44 is electrically connected to the internal antenna of the external wireless transceiver, and the second end of the second capacitor 44 is electrically connected to the second end of the RF switch connector 31 and the first end of the second inductor 45, respectively. . In this embodiment, as shown in FIG. 4A, when the external RF plug is not inserted into the RF switch connector, the first detecting port 42 is connected to the ground, and the first detecting port is at a low level; as shown in FIG. 4B, When the external RF plug is inserted into the RF switch connector, the voltage of the first detection port 42 is the value of the pull-up voltage, and the first detection port is at a high level.

Further, the first inductor in this embodiment may be replaced by a resistor, and the second inductor may also be replaced by a resistor, which is preferably a high-resistance resistor, such as tens to hundreds of kiloohms.

In the embodiment of the invention, the state in which the external RF plug is inserted is converted into a high level output by the detecting circuit, and the state in which the external RF plug is not inserted is converted into a low level output, so as to facilitate detection of the insertion state of the RF switch connector.

5A is a schematic diagram of a third embodiment of the detecting device for detecting an external connection of a radio frequency interface in an uninserted state according to the present invention, and FIG. 5B is a schematic diagram of an insertion state of the third embodiment of the detecting device for detecting an extrapolation connection of a radio frequency interface according to the present invention; 5A and 5B, on the basis of the first embodiment of the apparatus, the detecting circuit 33 in the apparatus includes a second detecting unit 50.

The second detecting unit 50 is configured to output a low level on the detecting port of the detecting circuit 33 when the external RF plug is inserted in the RF switch connector 31, and when the external RF plug is not inserted in the RF switch connector 31, in the detecting circuit 33 The second detection port outputs a high level.

The second detecting unit 50 may specifically include: a third capacitor 51, a third inductor 53, a fourth inductor 55, a second resistor 57, a second pull-up voltage port 59, and a second detecting port 52.

The first end of the third capacitor 51 is electrically connected to the front end of the external RF transceiver, and the second end of the third capacitor 51 is electrically connected to the first end of the RF switch connector 31 and the first end of the third inductor 53 respectively.

The second ends of the third inductor 53 are electrically connected to the first ends of the second detecting port 52 and the second resistor 57, respectively.

The second end of the second resistor 57 is grounded.

The first end of the fourth inductor 55 is electrically connected to the second end of the RF switch connector 31, and the second end of the fourth inductor 55 is electrically connected to the second pull-up voltage port 59. The first end of the RF switch connector 31 is an end connected to the external RF plug when the external RF plug is inserted.

The capacitors used in this embodiment are DC blocking capacitors. The inductors used in this embodiment are DC blocking inductors. In this embodiment, the topology of the detection circuit is changed by the difference of the connection state of the self-port by the RF switch connector when the external RF plug is inserted, so that the voltage of the detection port of the detection circuit also changes, thereby detecting the external RF plug. Whether to insert the purpose; at the same time, the blocking circuit uses a DC blocking capacitor and a blocking inductor to ensure isolation between the DC and high frequency circuits.

In another embodiment of the embodiment, the second detecting unit may further include a fourth capacitor 54. The first end of the fourth capacitor 54 is electrically connected to the internal antenna of the external wireless transceiver, and the second end of the fourth capacitor 54 is electrically connected to the second end of the RF switch connector 31 and the first end of the fourth inductor 55, respectively. .

In this embodiment, as shown in FIG. 5A, when the external RF plug is not inserted into the RF switch connector, the second detection port 52 and the second pull-up voltage port 59 are connected, and the second detection port 52 is at a high level; As shown in FIG. 5B, when the external RF plug is inserted into the RF switch connector, if there is no DC voltage on the external RF plug, the voltage of the second detection port 52 is pulled down by the ground, and the second detection port 52 is low. Level.

Further, the third inductor in this embodiment may be replaced by a resistor, and the fourth inductor may also be replaced by a resistor, which is preferably a high-resistance resistor, such as tens to hundreds of kiloohms.

In the embodiment of the present invention, the state in which the external RF plug is inserted is converted into a low level output by the detecting circuit, and the state in which the external RF plug is not inserted is converted into a high level output, so as to facilitate detection of the insertion state of the RF switch connector.

The embodiment of the present invention further provides a method for detecting an extrapolation connection of a radio frequency interface, which uses the detection device for detecting an extrapolation connection of a radio frequency interface to detect the radio frequency switch connector according to the embodiment of the present invention. The output level of the detection port of the detecting device can determine whether an external RF plug is inserted into the RF switch connector, that is, the RF interface.

In the embodiment of the present invention, the state in which the external radio frequency plug is inserted or not inserted is turned by the detecting circuit. Switch to DC level output to facilitate detection of the insertion status of the RF switch connector.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

What is claimed is: 1. A detecting device for detecting an external connection of a radio frequency interface, comprising: a radio frequency switch connector and a detecting circuit connected to the radio frequency switch connector;

2. The detecting device for detecting an extrapolation connection of a radio frequency interface according to claim 1, wherein the detecting circuit comprises:

a first detecting unit, configured to output a high level at a detecting port of the detecting circuit when an external RF plug is inserted in the RF switch connector, and when an external RF plug is not inserted in the RF switch connector, The detection port of the detection circuit outputs a low level; or

a second detecting unit, configured to output a low level on the detecting port of the detecting circuit when the external RF plug is inserted in the RF switch connector, and when the external RF plug is not inserted in the RF switch connector, The detection port of the detection circuit outputs a high level.

The detecting device for detecting an external connection of the radio frequency interface according to claim 2, wherein the first detecting unit comprises:

a first capacitor, a first inductor, a second inductor, a first resistor, a first pull-up voltage port, and a first detection port;

The first end of the first capacitor is electrically connected to the front end of the external RF transceiver, and the second end of the first capacitor is respectively connected to the first end of the RF switch connector and the first end of the first inductor Electrical connection

The second end of the first inductor is grounded;

The first end of the second inductor is electrically connected to the second end of the RF switch connector, and the second end of the second inductor is respectively connected to the first end of the first resistor and the first detecting port Electrical connection

The second end of the first resistor is electrically connected to the first pull-up voltage port; The first end of the RF switch connector is an end connected to the external RF plug when the external RF plug is inserted.

The detecting device for detecting the external connection of the radio frequency interface according to claim 3, wherein the first detecting unit further comprises: a second capacitor;

The first end of the second capacitor is electrically connected to the built-in antenna of the external wireless transceiver, and the second end of the second capacitor is respectively connected to the second end of the RF switch connector and the second inductor One end is electrically connected.

The detecting device for detecting an external connection of the radio frequency interface according to claim 2, wherein the second detecting unit comprises:

a third capacitor, a third inductor, a fourth inductor, a second resistor, a second pull-up voltage port, and a second detection port;

The first end of the third capacitor is electrically connected to the front end of the external RF transceiver, and the second end of the third capacitor is respectively connected to the first end of the RF switch connector and the first end of the third inductor Electrical connection

The second end of the third inductor is electrically connected to the second detecting port and the first end of the second resistor, respectively;

The second end of the second resistor is grounded;

The first end of the fourth inductor is electrically connected to the second end of the RF switch connector, and the second end of the fourth inductor is electrically connected to the second pull-up voltage port;

The first end of the RF switch connector is an end connected to the external RF plug when the external RF plug is inserted.

The detecting device for detecting an external connection of the radio frequency interface according to claim 5, wherein the second detecting unit further comprises: a fourth capacitor;

The first end of the fourth capacitor is electrically connected to the built-in antenna of the external wireless transceiver, and the second end of the fourth capacitor is respectively connected to the second end of the RF switch connector and the fourth inductor One end is electrically connected.

The detecting device for detecting an external connection of a radio frequency interface according to claim 3 or 4, wherein the first inductance is replaced by a first resistor, and/or the second inductor is replaced by a second resistor instead.

The detecting device for detecting an extrapolation connection of a radio frequency interface according to claim 5 or 6, wherein the third inductance is replaced by a third resistor, and/or the fourth inductor is replaced by a fourth resistor. instead.

A method for detecting an external connection of a radio frequency interface, comprising: detecting, by using a detecting device for detecting an extrapolation connection of a radio frequency interface according to any one of claims 1-8, according to an output of the detecting port Level, determine whether the RF interface is plugged into an external RF plug.