WO2017049852A1

WO2017049852A1 - Device, method, and base station for detecting whether antenna is in place

Info

Publication number: WO2017049852A1
Application number: PCT/CN2016/073963
Authority: WO
Inventors: 陈豪; 瞿兆斌; 黄雄军; 付灿
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-23
Filing date: 2016-02-17
Publication date: 2017-03-30
Also published as: CN106550391A

Abstract

The present invention provides a device, method, and base station for detecting whether an antenna is in place. In the present invention, whether an antenna is in place is determined by disposing a short-circuit line, a voltage dividing module, and a detection module, and then detecting a voltage of a third end of the voltage dividing module via the detection module. The present invention can accurately perform detection on an in-place condition of an antenna, and has characteristics of a simple structure, stable operation, a small occupation area, a wide application range, etc.

Description

Antenna in-position detecting device, method and base station

The present application claims priority to Chinese Patent Application No. 201510612731.6, filed on Sep. 23, 2015, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present invention relates to the field of communications, and in particular, to an antenna in-position detecting apparatus, method, and base station.

Background technique

The existing wireless base station antenna connection state, that is, whether the position is detected is obtained by standing wave measurement, and the connection state between the base station and the antenna is determined by the magnitude of the standing wave value. This method is widely used in various wireless transmitters. As shown in Figure 1. In the macro base station, standing wave detection is generally implemented by feedback predistortion channel or by directional coupler plus detection circuit, but no matter which implementation method, more circuits are added, it is necessary to occupy the layout area of the circuit board, and increase the base station. cost. In the micro base station, the transmission power is small, the linearity index is not high, and there is no feedback predistortion channel, and the microstation has high requirements on volume and cost. The directional coupler is added to the detection wave tube circuit to realize standing wave detection. The solution is also not suitable, so the state detection of the microstation antenna becomes a problem.

Summary of the invention

The invention provides an antenna in-position detecting device, method and base station, which can accurately realize the detection of the position of the antenna, and has the characteristics of simple structure, stable operation, small occupied area and wide application range.

The invention provides the following solutions:

An embodiment of the present invention provides an antenna in-position detecting apparatus, including:

The first end is connected to the antenna, and the second end is connected to the short circuit of the ground, and the short-circuit line presents an open state to the radio frequency signal, and presents a short-circuit state to the DC signal;

a first end is respectively connected to the first end of the capacitor, the antenna, and the second end is connected to the power supply by a voltage dividing module;

And a detecting module connected to the third end of the voltage dividing module, wherein the detecting module determines whether the antenna is in position by detecting the voltage of the third end.

Preferably, the length of the short-circuit line is a quarter wavelength or a quarter-wavelength plus an integer multiple of a half-wavelength, the wavelength being the wavelength of the radio frequency signal that the antenna needs to transmit.

Preferably, the voltage dividing module comprises a first resistor and a second resistor; wherein:

The first end of the first resistor is respectively connected to the first end of the capacitor and the antenna, and the second end of the first resistor is connected to the third end;

The first end of the second resistor is connected to the third end, and the second end of the second resistor is connected to the power source.

Preferably, the resistances of the first resistor and the second resistor are greater than the impedance of the radio frequency signal generating circuit; and/or

The resistance of the second resistor is greater than the resistance of the first resistor.

Preferably, the second end of the capacitor is connected to the radio frequency signal transmitting unit in the base station.

Preferably, the voltage of the power source is 2.5V, the resistance of the first resistor is 1K ohms, the resistance of the second resistor is 20K ohms, and the capacitance of the capacitor is 1000pf.

The embodiment of the invention further provides an antenna in-position detection method, including:

Obtaining the voltage value of the third end of the voltage dividing module according to a preset period;

Based on the relationship between the voltage value and the preset value, it is determined whether the antenna is in position.

Preferably, determining whether the antenna is in place based on a relationship between the voltage value and a preset value includes:

When the voltage value is greater than a preset value, determining that the antenna is not in position;

When the voltage value is less than the preset value, it is determined that the antenna is in position.

Preferably, the method further includes: before acquiring the voltage value of the third end of the voltage dividing module:

Determining the preset value;

The preset value is greater than a voltage of the third end when the detected antenna is in position, and is less than a voltage of the third end when the detected antenna is not in position.

The embodiment of the present invention further provides a base station, which may specifically include the antenna in-position detecting apparatus provided by the foregoing embodiment of the present invention.

An embodiment of the present invention further provides an antenna in-position detecting device, including:

processor;

a memory for storing processor executable instructions;

Wherein the processor is configured to:

Embodiments of the present invention also provide a non-transitory computer readable storage medium having stored therein instructions that, when executed by a processor, cause the processor to implement an antenna in-position detection method, The method includes the following steps:

It can be seen from the above that the antenna in-position detecting device, method and base station provided by the invention provide a short-circuit line, a voltage dividing module, a detecting module, and the detecting module detects the voltage of the third end of the voltage dividing module to determine Whether the antenna is in place. It can accurately detect the position of the antenna, and has the characteristics of simple structure, stable operation, small occupied area and wide application range.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and it can be used by those skilled in the art without creative labor. Other figures are obtained from these figures.

1 is a schematic structural view of a conventional standing wave detecting circuit;

2 is a schematic structural diagram 1 of an antenna in-position detecting apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram 2 of an antenna in-position detecting apparatus according to an embodiment of the present invention; FIG.

4 is a schematic flowchart 1 of an antenna in-position detecting method according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart 2 of an antenna in-position detection method according to an embodiment of the present invention.

detailed description

The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the invention are within the scope of the invention.

Unless otherwise defined, technical terms or scientific terms used herein shall be taken to mean the ordinary meaning of the ordinary skill in the art to which the invention pertains. The words "first", "second" and similar terms used in the specification and claims of the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the words "a" or "an" and the like do not denote a quantity limitation, but mean that there is at least one. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship is also changed accordingly.

The embodiment of the present invention provides an antenna in-position detecting device. As shown in FIG. 2, the device may specifically include:

The first end is connected to the antenna 1, and the second end is connected to the short-circuit line 2, and the short-circuit line 2 presents an open state to the radio frequency signal, and presents a short-circuit state to the DC signal;

The first end (node B) is respectively connected to the first end of the capacitor C, the antenna 1, and the second end is connected to the power supply (VCC) by the voltage dividing module 3;

The detecting module 4 is connected to the third end (node A) of the voltage dividing module 3, and the detecting module 4 determines whether the antenna is in position by detecting the voltage of the third end of the voltage dividing module 3.

The antenna in-position detecting device provided by the embodiment of the invention can accurately detect the position of the antenna, and has the characteristics of simple structure, stable operation, small occupied area and wide application range.

The antenna in-position detecting device proposed by the embodiment of the present invention may specifically be composed of two parts, including a voltage dividing module 3 and a detecting module 4 of the base station portion, and a short-circuit line 2 structure of the antenna portion, wherein the short-circuit line 2 presents an open circuit to the radio frequency signal. The short-circuit line 2 is short-circuited, and the specific design form of the short-circuit line 2 includes a quarter-wavelength line or a quarter-wavelength plus an integral multiple of a half-wavelength. The combination of the above two parts makes the use of the principle of impedance transformation of the quarter-wavelength line. When the detection module detects that the voltage at the third end of the voltage dividing module is greater than the preset value, it indicates that the antenna and the base station are connected normally, that is, the antenna is Bit, otherwise, indicates that the antenna and base station are disconnected, that is, the antenna is not in position.

In the embodiment of the present invention, as shown in FIG. 2, after the antenna is connected to the short-circuit line 2, that is, after the antenna 2 is added to the quarter-wavelength line, the impedance of the RF signal at the node D is obtained according to the principle of impedance transformation.

Where Z _L is the load impedance, Z ₀ is the characteristic impedance, β is the wave number, and d is the length of the short-circuit line 2. In the present invention, Z _L is 0, so the impedance at point D is simplified to Z _in (D) = jZ _O tan (βd), and the formula for changing to wavelength is

According to this principle, a length of one quarter wavelength or a quarter wavelength plus an integer multiple of one-half wavelength is added to the structure of the antenna (ie, when

Short circuit to ground, impedance

It is infinitely large so that it does not affect the radiation of the RF signal, and the impedance of the DC signal is zero.

In a specific embodiment, the length of the short-circuit line 2 involved in the embodiment of the present invention is a quarter wavelength λ, the wavelength is the wavelength λ of the radio frequency signal that the antenna needs to transmit, and the wavelength λ=wave speed/frequency, wherein the frequency It is attached to the operating frequency range of the antenna.

In the embodiment of the present invention, the quarter-wavelength line design of the antenna 1 portion ensures that the radio frequency signal transmission is not affected, and the current in-position detection can be grounded.

The length of the above-mentioned quarter-wavelength is a better expression of the short-circuit line 2, and has the characteristics of saving short-circuit lines and reducing circuit cost. In other embodiments of the present application, the length of the short-circuit line 2 may specifically be other forms such as a quarter-wavelength plus an integer multiple of a half-wavelength line, and only the short-circuit line 2 is required to open the RF signal. The state is short-circuited to the DC signal.

In a specific embodiment, as shown in FIG. 3, the voltage dividing module 3 according to the embodiment of the present invention may specifically include a resistor R1 and a resistor R2;

The first end of the resistor R1 is respectively connected to the first end of the capacitor C, the antenna 1 (ie, connected to the node B), and the second end of the resistor R1 is connected to the third end of the voltage dividing module 3 (ie, the node A).

The first end of the resistor R2 is connected to the node A, and the second end of the resistor R2 is connected to the power source VCC.

Then, in the embodiment shown in FIG. 3, when the antenna is not connected or is not in place, the base station output port, that is, the antenna 1 is open to DC, and at this moment, the resistor R2 has no current, that is, there is no voltage drop, then the point A The voltage is equal to the power supply VCC; when the antenna 1 is connected or in place, the DC signal is connected to the ground through the base station output port and the short-circuit line 2, that is, the quarter-wave line, forming a loop, thereby generating a current on the resistor R2. The size is VCC/(R1+R2), a voltage drop occurs across the resistor R2, and the voltage at point A is R1*VCC/(R1+R2). The detecting module 4 can determine whether the antenna is in position by detecting the voltage change at point A.

In order to prevent the DC signal from damaging other devices on the base station side, the capacitor C is set to function as a reverse isolation in the embodiment of the present invention. The second end of the capacitor C can be specifically connected to the radio frequency signal transmitting unit in the base station.

In the embodiment of the present invention, the selection of the capacitance value may be in accordance with a general RF circuit blocking capacitance design principle, for example, 1000 pf, which will not be described herein.

In the embodiment of the invention, the design of the resistor is to follow the following three principles:

1. It is necessary to ensure that when the power supply voltage is at the set value, the actual power on the resistor does not exceed the highest value that the resistor package can withstand.

Take the voltage of the power supply VCC as 2.5V, the resistance of the resistor R1 as 1K ohm, and the resistance of the resistor R2 as 20K ohm. For example, when the antenna is in position, the current on the resistor is I=2.5/(1+20)= 0.1190mA, so the power on the resistor R1 is I*I*R1=0.0141mW, and the power on R2 is I*I*R2=0.28345mW, while the power of the 0402 package is generally about 60mW, which satisfies the requirement 1. .

2. The resistance of the resistor R1 and the resistor R2 needs to be as large as possible, at least larger than the impedance of the RF signal generating circuit, so that the normal operation of the RF signal generating circuit is not affected.

For example, the impedance of the common RF signal generating circuit is 50 ohms. In the embodiment of the present invention, the sum of the resistances of the resistor R1 and the resistor R2 should be much larger than 50 ohms, and the resistance of the resistor R1 is 1K ohm. For example, the resistance value of R2 is 20K ohms, and the sum of the resistances of the resistors R1 and R2 is 21K ohms, which is much larger than 50 ohms, and the difference between the two is large. Therefore, the antenna in-position detection resistance provided by the embodiment of the present invention is The addition of values does not affect the matching between the base station and the antenna and the normal operation of the base station.

3. The resistance of resistor R2 should be greater than the resistance of resistor R1, so as to ensure that the voltage change of node A is large enough, so that the detection module 4 can easily detect the voltage of node A.

For example (the specific parameters are the same as above), when the antenna is not in position, the voltage of node A is 2.5V. When the antenna is in position, the voltage at point A is: I*R1=0.1190*1=0.1190V. Large, so that the detection module 4 can easily detect the change in voltage.

The detecting module 4 according to the embodiment of the present invention may be embodied as a detecting device or a detecting circuit. The detecting device or the circuit can not only realize the voltage detection at the power saving A, but also realize the voltage value display, the voltage value storage and the transmission. And other functions.

The detecting module 4 according to the embodiment of the present invention is specifically disposed in the base station or integrated in the digital intermediate frequency unit in the base station.

The antenna in-position detecting apparatus provided in the above embodiment of the present invention can perform antenna in-position detection simply and efficiently by setting a combination of devices at the base station and the antenna.

The embodiment of the present invention further provides an antenna in-position detection method, as shown in FIG. 4, which may specifically include:

In the specific implementation of the embodiment of the present invention, the preset value may be determined in advance. In order to ensure the accuracy of the detection, the preset value X involved in the embodiment of the present invention may be greater than the voltage of the node A, which is the third end of the voltage divider module 3 when the detected antenna is in position, and is less than when the detected antenna is not in position. The voltage at the third end of the voltage divider module 3. For example, when the antenna is in position, the voltage at point A is 0.1190V, and when the voltage at point A is 2.5V, the preset value X can be less than 2.5V and greater than 0.1190V. In a specific embodiment, the preset value may specifically be 2V.

Then, when the voltage of the node A is greater than the preset value, it is determined that the antenna is not in the bit; when the voltage of the node A is less than the preset value, it is determined that the antenna is in position.

A specific implementation process of the antenna in-position detection method provided by the embodiment of the present invention is described in detail below with reference to FIG. 4 as an example.

After the base station is powered on, first complete the initialization of the system, and then enter the loop detection process, obtain the voltage of the node A according to the preset time interval, and determine whether the voltage value is greater than a preset value, and if it is greater than the preset value, determine The antenna is not in position, and then enters the detection process again; otherwise, it determines that the antenna is in place and then enters the detection process again.

The embodiment of the present invention further provides a base station, which may specifically include the antenna in-position detecting apparatus provided by the foregoing embodiment of the present invention. The base station may specifically be a radio base station such as a macro base station or a micro base station.

The above is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of the present invention. It should also be considered as the scope of protection of the present invention.

Industrial applicability

The antenna in-position detecting apparatus and method of the present application can be applied to a base station by setting a short-circuit line, a voltage dividing module and a detecting module, and the detecting module detects the voltage of the third end of the voltage dividing module to determine whether the antenna is in position. Accurately realize the detection of the position of the antenna, which has the characteristics of simple structure, stable operation, small occupied area and wide application range.

Claims

An antenna in-position detecting device includes:

The first end is connected to the antenna, and the second end is connected to the short circuit of the ground, and the short-circuit line presents an open state to the radio frequency signal, and presents a short-circuit state to the DC signal;

a first end is respectively connected to the first end of the capacitor, the antenna, and the second end is connected to the power supply by a voltage dividing module;

And a detecting module connected to the third end of the voltage dividing module, wherein the detecting module determines whether the antenna is in position by detecting the voltage of the third end.
The apparatus according to claim 1, wherein said short-circuit line has a length of a quarter wavelength or a quarter-wavelength plus an integral multiple of a half-wavelength, said wavelength being an RF which the antenna needs to transmit The wavelength of the signal.
The device of claim 1 wherein said voltage divider module comprises a first resistor and a second resistor; wherein:

The first end of the first resistor is respectively connected to the first end of the capacitor and the antenna, and the second end of the first resistor is connected to the third end;

The first end of the second resistor is connected to the third end, and the second end of the second resistor is connected to the power source.
The device of claim 1, wherein the resistance of the first resistor and the second resistor is greater than an impedance of the radio frequency signal generating circuit; and/or

The resistance of the second resistor is greater than the resistance of the first resistor.
The apparatus of claim 1 wherein the second end of the capacitor is coupled to a radio frequency signal transmitting unit within the base station.
The device according to any one of claims 1 to 5, wherein the voltage of the power source is 2.5 V, the resistance of the first resistor is 1 K ohm, and the resistance of the second resistor is 20 K ohm. The capacitance of the capacitor is 1000pf.
An antenna in-position detecting method is applied to the antenna in-position detecting apparatus according to any one of claims 1 to 6, the method comprising:

Obtaining the voltage value of the third end of the voltage dividing module according to a preset period;

Based on the relationship between the voltage value and the preset value, it is determined whether the antenna is in position.
The method of claim 7, wherein the determining whether the antenna is in place based on a relationship between the voltage value and a preset value comprises:

When the voltage value is greater than a preset value, determining that the antenna is not in position;

When the voltage value is less than the preset value, it is determined that the antenna is in position.
The method according to claim 7 or 8, wherein the method further comprises: before acquiring the voltage value of the third end of the voltage dividing module:

Determining the preset value;

The preset value is greater than a voltage of the third end when the detected antenna is in position, and is less than a voltage of the third end when the detected antenna is not in position.
A base station, comprising the antenna presence detecting device according to any one of claims 1-6.