KR20010111927A - Device and method for diagnosing bts transmit-receive antenna combined wide band and narrow band in imt-2000 system - Google Patents

Abstract

The present invention relates to a device for checking a wideband / narrowband base station transmit / receive antenna in an IMT-2000 system, and more particularly, a narrowband (1.25MHz) frequency for a PCS / DCS system and a wideband (3.75) for an IMT-2000 system. (MHz) Diagnosis of standing wave ratio of base station transmit / receive antenna that accepts frequency in common and at the same time, it displays to the operator whether the transmit / receive antenna is faulty. Broadband / narrowband base station transmit / receive in IMT-2000 system The present invention relates to an antenna check apparatus and a method thereof, and according to the present invention, a broadband / narrow band base station transmit / receive antenna check apparatus and method thereof according to the present invention provide an operator with a PCS / DCS narrowband frequency and an IMT-. 2000 Wide band frequency base station transmit / receive antenna has an excellent effect of making it easy to check whether there is a malfunction.

Description

Broadband / narrowband base station transmit / receive antenna check device and method in IMT-2000 system {DEVICE AND METHOD FOR DIAGNOSING BTS TRANSMIT-RECEIVE ANTENNA COMBINED WIDE BAND AND NARROW BAND IN IMT-2000 SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for and inspection of a broadband / narrowband base station transmit / receive antenna in an International Mobile Telecommunication (IMT) -2000 system, and more particularly, to a personal communication service (PCS) /. Diagnose Voltage Standing Wave Ratio (VSWR) of base station transmit / receive antennas that commonly accept narrowband (1.25MHz) frequencies for digital communication service (DCS) systems and wideband (3.75MHz) frequencies for IMT-2000 systems The present invention relates to a wideband / narrowband base station transmit / receive antenna inspection apparatus and method for displaying an operator in an IMT-2000 system that displays a failure of the transmit / receive antenna at the same time.

In the conventional PCS / DCS system, the base station transmit / receive antenna check apparatus is shown in FIG. 1, as shown in FIG. 1, a key input unit 11, a control unit 12, and an RF (Radio Frequency; RF). The receiver 13, the 4-port directional coupler 14, the comparator 15, and the display 16 were comprised.

Next, an operation process of the base station transmit / receive antenna check apparatus in the conventional PCS / DCS system having the above configuration will be described.

First, the control unit 12 outputs an RF transmission control signal to the RF transmission / reception unit 13 when the operator selects the antenna check mode through the key input unit 11.

Then, the RF transmitter / receiver 13 receives the RF transmission control signal from the controller 12 and outputs the narrowband RF signal for PCS / DCS to the 4-port directional coupler 14 accordingly.

Subsequently, the four-port directional coupler 14 passes the narrowband RF signal output from the RF transmitter / receiver 13 through a transmit / receive antenna 1 and through the reverse output terminal REV. The path is specified to be input to (15), and on the other hand, the path is specified so that the narrowband RF signal is directly input to the comparator 15 through the direct forward output (FWD).

Then, the comparator 15 is output from the RF transmitter / receiver 13 and then the narrowband RF signal input through the transmit / receive antenna 1 and the narrowband through the transmit / receive antenna 1. By comparing the RF signals, the standing wave ratio of the transmission / reception antenna 1 is calculated.

Thereafter, the comparator 15 transmits the standing wave ratio diagnosis result value of the transmission / reception antenna 1 to the display unit 16.

Then, the display unit 16 receives the standing wave ratio diagnosis result value of the transmission / reception antenna 1 output from the comparator 15 and displays the result to the operator. Accordingly, the operator checks the standing wave ratio of the base station transmit / receive antenna 1 displayed through the display unit 16 and checks the performance and failure of the base station transmit / receive antenna 1.

However, in the conventional PCS / DCS system, the base station transmit / receive antenna inspection apparatus can check whether the base station transmit / receive antenna that accepts the narrowband frequency for the PCS / DCS system has failed, but the next-generation broadband frequency and the existing PCS / The performance of the transmit / receive antenna in the IMT-2000 base station system using a narrowband frequency for DCS cannot be checked.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to allow an operator to easily check whether a base station transmit / receive antenna of both PCS / DCS narrowband frequency and IMT-2000 wideband frequency is used. The present invention provides a wideband / narrowband base station transmit / receive antenna check apparatus and method therefor in an IMT-2000 system.

In order to achieve the above object, the broadband / narrowband dual base station transmit / receive antenna inspection apparatus of the present invention IMT-2000 system, IMT-2000 for accommodating PCS / DCS narrowband frequency and IMT-2000 wideband frequency in common. In the base station transmit / receive antenna check device in the system,

A key input unit for outputting a selection signal corresponding to the operator selecting the wideband check mode or the narrowband check mode;

When the wideband check selection signal is input from the key input unit, a wideband switching control signal and a wideband transmission control signal are output. A controller for outputting a band transmission control signal;

An RF transmitter / receiver configured to output a wideband RF signal corresponding to the wideband transmission control signal when the wideband transmission control signal is input from the controller;

A wideband comparator for calculating a standing wave ratio of the transmit / receive antenna by comparing the wideband RF signal output from the RF transmit / receive unit and not passed through the transmit / receive antenna and the wideband RF signal passed through the transmit / receive antenna;

A narrowband comparator for calculating a standing wave ratio of the transmit / receive antenna by comparing the narrowband RF signal output from the RF transmitter / receiver and not passed through the transmit / receive antenna with the narrowband RF signal passed through the transmit / receive antenna. ;

A path is designated so that a wideband or narrowband RF signal output from the RF transmitter / receiver passes through the transmit / receive antenna and is input to the wideband or narrowband comparator through a reverse output terminal (REV), and on the other hand, A four-port directional coupler that directs a wideband or narrowband RF signal to the wideband or narrowband comparator through a direct forward output (FWD);

When receiving the wideband switching control signal from the controller, the reverse output terminal REV of the 4-port directional coupler is connected to the input terminal of the wideband comparator, and when the narrowband switching control signal is received from the controller, the 4-port directional coupler. An RF switch connecting a reverse output terminal (REV) and an input terminal of the narrowband comparator;

When the wideband switching control signal is input from the controller, the forward output terminal (FWD) of the 4-port directional coupler is connected to the input terminal of the wideband comparator, and when the narrowband switching control signal is input from the controller, the 4-port directional coupler is input. An SPDT switch for connecting a forward output terminal of the narrowband comparator to an input terminal of the narrowband comparator; And

And a display unit configured to display the operator after receiving the standing wave ratio diagnosis result of the transmit / receive antenna from the wideband / narrowband comparator.

In addition, the method for checking a broadband / narrowband base station transmit / receive antenna in the IMT-2000 system of the present invention includes whether the controller selects a wideband check mode or a narrowband check mode through a key input unit. Determining the first step;

When the operator selects the broadband check mode through the key input unit in the first step, the controller outputs a broadband switching control signal to the RF switch and the SPDT switch, and forward / reverse output stages of the 4-port directional coupler (FWD / REV) and a signal input terminal of the wideband comparator;

A third step of the control unit outputting a wideband transmission control signal to the RF transmitter / receiver;

A fourth step of outputting, by the RF transmitter / receiver, a wideband RF signal to the 4-port directional coupler accordingly after receiving the wideband transmission control signal from the controller;

After the wideband comparator is output from the RF transmitter / receiver, the wideband RF signal input without passing through the transmit / receive antenna is compared with the wideband RF signal passed through the transmit / receive antenna, and the standing wave ratio of the transmit / receive antenna is determined. A fifth step of calculating;

A sixth step of transmitting, by the wideband comparator, a standing wave ratio diagnosis result value of the transmit / receive antenna to a display unit; And

The display unit receives a standing wave ratio diagnosis result value of the transmission / reception antenna from the wideband comparator and displays the result of the seventh step.

1 is a functional block diagram showing the configuration of an apparatus for checking a base station transmit / receive antenna in a conventional PCS / DCS system;

2 is a functional block diagram showing the configuration of a wideband / narrowband base station transmit / receive antenna check apparatus in an IMT-2000 system according to an embodiment of the present invention;

3 is an operation flowchart illustrating a method for checking a wideband / narrowband base station transmit / receive antenna in an IMT-2000 system according to FIG. 2;

FIG. 4 is a diagram illustrating waveforms of a DCP / PCS narrowband frequency and an IMT-2000 wideband frequency which are output signals of an RF transmitter / receiver in the broadband / narrowband base station transmit / receive antenna check in the IMT-2000 system according to FIG. 2. to be.

<Explanation of symbols for the main parts of the drawings>

100: key input unit 200: control unit

300: RF transmitter / receiver 400: wideband comparator

500: narrowband comparator 600: 4-port directional coupler

700: RF switch 800: SPDT switch

900 display unit

Hereinafter, an apparatus for checking a broadband / narrowband base station transmit / receive antenna and its method in an IMT-2000 system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a functional block diagram of a broadband / narrow-band base station transmit / receive antenna check apparatus in an IMT-2000 system according to an embodiment of the present invention. / Narrowband combined base station transmit / receive antenna check device for key input unit 100, control unit 200, RF transmission and reception unit 300, wideband comparator 400, narrowband comparator 500, 4-port directional coupler ( 600), an RF switch 700, a single-pole double-throw (SPDT) switch 800, and a display unit 900.

When the operator selects the wide band check mode or the narrow band check mode, the key input unit 100 outputs a corresponding selection signal to the controller 200.

In addition, the controller 200 outputs a broadband switching control signal to the RF switch 700 and the SPDT switch 800 so as to correspond to the broadband check selection signal from the key input unit 100, and simultaneously controls the broadband transmission. While outputting a signal to the RF transmitter / receiver 300, when the narrowband check selection signal is received from the key input unit 200, a narrowband switching control signal is corresponding to the RF switch 700 and the SPDT switch 800. And a narrowband transmission control signal to the RF transmitter / receiver 300.

Meanwhile, when the RF transmitter / receiver 300 receives a wideband transmission control signal from the controller 200, the RF transmitter / receiver 300 outputs a wideband RF signal to the four-port directional coupler 600 so as to correspond thereto. When the narrowband transmission control signal is received from the corresponding narrowband RF signal is output to the 4-port directional coupler 600 accordingly.

In addition, the wideband comparator 400 outputs a wideband RF signal which has not been passed through the transmit / receive antenna 1 and the wideband RF signal that has passed through the transmit / receive antenna 1 after being output from the RF transmit / receive unit 300. In comparison, the standing wave ratio of the transmitting / receiving antenna 1 is calculated and the resultant value is output to the display unit 900.

Meanwhile, the narrowband comparator 500 is output from the RF transmitter / receiver 300 and then the narrowband RF signal that does not pass through the transmit / receive antenna 1 and the narrowband that passes through the transmit / receive antenna 1. Comparing the RF signal, calculates the standing wave ratio of the transmission / reception antenna 1 and outputs the result to the display unit 900.

In addition, the four-port directional coupler 600 is a coupler mounted between the feeder of the transmitting and receiving antenna 1, the reverse output terminal (REV) is connected to the RF switch 700 while the forward output terminal (FWD) Is connected to the SPDT switch 800, the wideband or narrowband RF signal output from the RF transmitter / receiver 300 passes through the transmit / receive antenna 1 and then through the reverse output terminal REV. The path is specified to be input to the narrowband comparator 400, 500, while the wideband or narrowband RF signal is input to the wideband or narrowband comparator 400, 500 via a direct forward output (FWD). It assigns paths as much as possible.

On the other hand, the RF switch 700 is connected to the reverse output terminal (REV) of the 4-port directional coupler 600 and the signal input terminal of the wideband comparator 400 when receiving the wideband switching control signal from the control unit 200 On the other hand, when the narrowband switching control signal is input from the control unit 200 serves to connect the reverse output terminal (REV) of the 4-port directional coupler 600 and the signal input terminal of the narrowband comparator 500.

In addition, the SPDT switch 800 connects the forward output terminal FWD of the 4-port directional coupler 600 and the signal input terminal of the wideband comparator 400 when the wideband switching control signal is input from the control unit 200. Meanwhile, when the narrowband switching control signal is input from the controller 200, the forward output terminal FWD of the 4-port directional coupler 600 and the signal input terminal of the narrowband comparator 500 are connected.

Meanwhile, the display unit 900 receives the standing wave ratio diagnosis result of the transmitting / receiving antenna 1 from the wideband / narrow band comparators 400 and 500 and displays the standing wave ratio result to the operator. Do it.

Then, the wideband / narrowband combined base station transmit / received in the IMT-2000 system according to an embodiment of the present invention using the wideband / narrowband combined base station transmit / receive antenna check apparatus in the IMT-2000 system having the above configuration. A method of checking a receiving antenna will be described with reference to FIGS. 3 and 4.

3 is an operation flowchart illustrating a method for checking a wideband / narrowband base station transmit / receive antenna in an IMT-2000 system according to an embodiment of the present invention.

First, the controller 200 determines whether the operator selects the wideband check mode or the narrowband check mode through the key input unit 100 (S1).

At this time, if the operator selects the broadband check mode through the key input unit 100 in the first step (S1), the control unit 200 is a broadband switching control signal to the RF switch 700 and the SPDT switch 800 By outputting the signal, the forward / reverse output terminal (FWD / REV) of the 4-port directional coupler 400 and the signal input terminal of the wideband comparator 400 are connected (S2).

Thereafter, the controller 200 outputs a wideband transmission control signal to the RF transmitter / receiver 300 (S3).

Then, the RF transmitter / receiver 300 receives a wideband transmission control signal from the controller 200 and outputs a wideband RF signal to the 4-port directional coupler 600 accordingly (S4). In this case, the four-port directional coupler 600 is a wideband RF signal output from the RF transmitter / receiver 300 passes through the transmit / receive antenna 1 and then through the reverse output terminal (REV) the broadband comparator 400 Path is specified to be input to the wideband comparator 400 through the forward forward output (FWD). On the other hand, the above-mentioned wideband RF signal is a frequency having a bandwidth (3.75MHz) three times the narrowband frequency (1.25MHz), as shown in FIG.

Then, the wideband comparator 400 is output from the RF transmitter / receiver 300 and then receives the wideband RF signal and the wideband RF which has passed through the transmit / receive antenna 1 without passing through the transmit / receive antenna 1. By comparing the signals, the standing wave ratio of the transmitting / receiving antenna 1 is calculated (S5).

Thereafter, the wideband comparator 400 transmits the standing wave ratio diagnosis result value of the transmission / reception antenna 1 to the display unit 900 (S6).

Then, the display unit 900 receives the standing wave ratio diagnosis result of the transmission / reception antenna 1 output from the wideband comparator 400 and displays the result to the operator (S7). Therefore, the operator sees the standing wave ratio of the base station transmit / receive antenna 1 displayed through the display unit 900, and the performance and failure status of the base station transmit / receive antenna 1 at the broadband frequency for IMT-2000. Will be checked.

On the other hand, when the operator selects the narrowband check mode through the key input unit 100 in the first step (S1), the control unit 200 is narrowband switching to the RF switch 700 and the SPDT switch 800 The control signal is output to connect the forward / reverse output terminal FWD / REV of the 4-port directional coupler 600 and the signal input terminal of the narrowband comparator 500 (S8).

Thereafter, the controller 200 outputs a narrowband transmission control signal to the RF transmitter / receiver 300 (S9).

Then, the RF transmitter / receiver 300 receives the narrowband transmission control signal from the control unit 200 and then corresponds to the four-port directional coupler 600 with the narrowband RF signal as shown in FIG. 4. (S10). In this case, the 4-port directional coupler 600 is a narrowband comparator through a reverse output terminal (REV) after the narrowband RF signal output from the RF transmitter / receiver 300 passes through the transmit / receive antenna 1. A path is specified to be input to 500 and at the same time, a path is specified such that the narrowband RF signal is input to the narrowband comparator 500 directly through a forward output terminal (FWD).

Then, the narrowband comparator 500 is output from the RF transmitter / receiver 300 and then passes through the narrowband RF signal and the transmit / receive antenna 1 that do not go through the transmit / receive antenna 1. The standing wave ratio of the transmission / reception antenna 1 is calculated by comparing the narrowband RF signals (S11).

Thereafter, the narrowband comparator 500 transmits the standing wave ratio diagnosis result value of the transmission / reception antenna 1 to the display unit 900 (S12).

Then, the display unit 900 receives the standing wave ratio diagnosis result of the transmission / reception antenna 1 output from the narrowband comparator 500 and displays the result to the operator (S13). Therefore, the operator sees the standing wave ratio of the base station transmit / receive antenna 1 displayed through the display unit 900, and the performance and failure at the narrowband frequency of the base station transmit / receive antenna 1 for PCS / DCS. It will be checked whether or not.

As described above, according to the apparatus for checking a broadband / narrowband base station transmit / receive antenna in an IMT-2000 system according to the present invention and a method thereof, an operator can perform a PCS / DCS narrowband frequency and an IMT-2000 wideband frequency base station transmission. It has an excellent effect of making it easy to check whether the receiving antenna is broken.

Claims (3)

A base station transmit / receive antenna check apparatus in an IMT-2000 system that accepts a PCS / DCS narrowband frequency and an IMT-2000 wideband frequency in common, A key input unit for outputting a selection signal corresponding to the operator selecting the wideband check mode or the narrowband check mode; When the wideband check selection signal is input from the key input unit, a wideband switching control signal and a wideband transmission control signal are output. A controller for outputting a band transmission control signal; An RF transmitter / receiver configured to output a wideband RF signal corresponding to the wideband transmission control signal when the wideband transmission control signal is input from the controller; A wideband comparator for calculating a standing wave ratio of the transmit / receive antenna by comparing the wideband RF signal output from the RF transmit / receive unit and not passed through the transmit / receive antenna and the wideband RF signal passed through the transmit / receive antenna; A narrowband comparator for calculating a standing wave ratio of the transmit / receive antenna by comparing the narrowband RF signal output from the RF transmitter / receiver and not passed through the transmit / receive antenna with the narrowband RF signal passed through the transmit / receive antenna. ; A path is specified so that a wideband or narrowband RF signal output from the RF transmitter / receiver passes through the transmit / receive antenna and is then input to the wideband or narrowband comparator through a reverse output terminal (REV). A four-port directional coupler that directs a wideband or narrowband RF signal to the wideband or narrowband comparator through a direct forward output (FWD); When receiving the wideband switching control signal from the controller, the reverse output terminal REV of the 4-port directional coupler is connected to the input terminal of the wideband comparator, and when the narrowband switching control signal is received from the controller, the 4-port directional coupler. An RF switch connecting a reverse output terminal (REV) and an input terminal of the narrowband comparator; When the wideband switching control signal is input from the controller, the forward output terminal (FWD) of the 4-port directional coupler is connected to the input terminal of the wideband comparator, and when the narrowband switching control signal is input from the controller, the 4-port directional coupler is input. An SPDT switch for connecting a forward output terminal of the narrowband comparator to an input terminal of the narrowband comparator; And Checking the wideband / narrowband base station transmit / receive antenna in an IMT-2000 system, comprising: a display unit configured to display an operator after receiving the standing wave ratio diagnosis result value of the transmit / receive antenna from the wideband / narrowband comparator Device. A first step of the control unit determining whether the operator has selected the wideband check mode or the narrowband check mode through the key input unit; When the operator selects the broadband check mode through the key input unit in the first step, the controller outputs a broadband switching control signal to the RF switch and the SPDT switch, and forward / reverse output stages of the 4-port directional coupler (FWD / REV) and a signal input terminal of the wideband comparator; A third step of the control unit outputting a wideband transmission control signal to the RF transmitter / receiver; A fourth step of outputting, by the RF transmitter / receiver, a wideband RF signal to the 4-port directional coupler accordingly after receiving the wideband transmission control signal from the controller; After the wideband comparator is output from the RF transmitter / receiver, the wideband RF signal input without passing through the transmit / receive antenna is compared with the wideband RF signal passed through the transmit / receive antenna, and the standing wave ratio of the transmit / receive antenna is determined. A fifth step of calculating; A sixth step of transmitting, by the wideband comparator, a standing wave ratio diagnosis result value of the transmit / receive antenna to a display unit; And And a seventh step of displaying, by the display unit, an operator of the standing wave ratio diagnosis result of the transmit / receive antenna from the wideband comparator, and displaying the result to an operator. How to check the antenna. The method of claim 2, When the operator selects the narrowband check mode through the key input unit in the first step, the control unit outputs a narrowband switching control signal to the RF switch and the SPDT switch, so that the forward / reverse output stage of the 4-port directional coupler ( FWD / REV) and a signal input terminal of the narrowband comparator; A ninth step of the control unit outputting a narrow band transmission control signal to the RF transmitter / receiver; A tenth step of outputting, by the RF transmitter / receiver, the narrowband RF signal to the four-port directional coupler accordingly after receiving the narrowband transmission control signal from the controller; The narrowband comparator outputs from the RF transmitter / receiver and compares the narrowband RF signal input without passing through the transmit / receive antenna with the narrowband RF signal passing through the transmit / receive antenna, thereby standing wave of the transmit / receive antenna. An eleventh step of calculating the ratio; A twelve step of transmitting, by the narrowband comparator, a standing wave ratio diagnosis result of the transmit / receive antenna to a display; And The display unit further includes a thirteenth step of displaying the standing wave ratio diagnosis result of the transmit / receive antenna from the narrowband comparator and displaying the result to an operator. How to check base station transmit / receive antenna.