KR100563321B1 - Radio network management apparatus a signal generator and spectrum analyzer and the function mesurement method thereof - Google Patents

Abstract

The present invention makes it easy to measure the isolation between the transmitting and receiving antennas that must be measured when installing and operating a wireless relay, without using a conventional expensive measuring equipment, as well as the isolation and antenna and cable. The present invention relates to a wireless network management device having a signal generator and a signal analyzer capable of selectively performing VSWR measurement, DTF measurement, and electric field strength measurement, and a function measuring method using the same.

To this end, the present invention, a signal generator for generating a reference signal by the frequency generator to have a desired magnitude and phase in the frequency band to be measured, and the reference signal generated from the signal generator and the signal reflected from the outside and transmitted The signal analyzer is connected to each other by a voltage standing wave ratio coupling unit, wherein the voltage standing wave ratio coupling unit receives a reference signal generated from the signal generator and separates the reference signal to be transmitted through a forward path and a reverse path. A switching control unit controls one or more high frequency switches for setting a transmission path such that a part of the reference signal separated by the combiner and the directional coupler is transmitted using the forward path and part of the reference signal is transmitted using the reverse path. Receiving high frequency switch matrix Providing the radio network management device having a signal generator and a signal analyzer and a method is provided to be used as the isolated him as measured VSWR, DTF, electric field strength and the like.

Signal Generator, Signal Analyzer, VSWR Module, Isolation Measurement, VSWR, DTF, Field Strength

Description

Radio network management apparatus a signal generator and spectrum analyzer and the function mesurement method

1 is a block diagram showing a wireless network management device having a signal generator and a signal analyzer in accordance with a preferred embodiment of the present invention;

2 is a block diagram showing the voltage standing wave ratio coupling unit of FIG.

3 is a flowchart illustrating a process of measuring isolation between transmission and reception antennas using the wireless network management apparatus of the present invention.

* Description of the symbols for the main parts of the drawings *

110: signal generator, 112: signal generation control unit,

113: frequency generating unit, 120: voltage standing wave ratio coupling unit,

121: wideband directional coupler, 122: high frequency switch matrix,

124: switching control, 130: signal analyzer,

132: signal analysis control unit, 135: frequency conversion unit,

136: intermediate frequency processing unit, 137: power detection unit.

The present invention relates to a wireless network management device having a signal generator and a signal analyzer and a method for measuring the function using the same. More specifically, the signal generator and the signal analyzer, that is, the spectrum analyzer are configured to be interconnected with the voltage standing wave ratio combining unit to perform a wireless relay. Wireless network management device with signal generator and signal analyzer to measure isolation, voltage standing wave ratio, etc. between transmitting and receiving antennas without carrying expensive measuring equipment used for installation It relates to a measuring method.

At present, with the development of wireless communication technology, the use of wireless communication devices such as cellular phones, PCS, and IMT2000 to provide various value-added services in addition to the basic call functions is common. Base stations and repeaters are installed and operated to use wireless communication services.

Since such base stations and repeaters are directly related to wireless communication services such as call quality, the service provider must perform continuous maintenance management for the normal operation of the base stations and repeaters.

In this case, in order to normally install and operate the wireless communication relay equipment provided to the base station or the repeater, the isolation between the transmitting antenna and the receiving antenna must be measured.

The isolation level is a measure of signal separation that allows the transmitting antenna and the receiving antenna to efficiently perform the transmission / reception function of the radio frequency with less interference with each other. In order to stably operate the repeater for wireless communication, Isolation should be secured by approximately 13 to 17 dB above the gain. That is, when a part of the transmitted signal is fed back to the receiving antenna, if the strength of the returned signal is more than a certain level, the quality of the wireless communication repeater deteriorates rapidly, so that the isolation between the transmitting and receiving antennas of the wireless repeater repeats continuously. It is to set the amplification gain required to be relayed with good quality based on the measurement data which should be monitored and extracted according to the monitoring result.

Here, in order to measure the isolation level in the wireless communication repeater, expensive signal generators and signal analyzers that are directly transported and used by an operator are used.

However, the signal generator and the signal analyzer required for measuring the isolation level are carried out by the operator, and the signal generator and the signal analyzer are expensive measuring equipments, and thus, it is expensive to maintain and manage them. In addition, there was a problem that is not easy to carry.

Accordingly, the present invention has been made to solve the above problems, to provide a measurement equipment that can be easily carried in place of conventional expensive and large measurement equipment to use the isolation between the transmitting and receiving antennas to reduce the convenience and cost of carrying It is an object of the present invention to provide a wireless network management apparatus having a signal generator and a signal analyzer.

In addition, the present invention provides a measurement method using a wireless network management device having a signal generator and a signal analyzer to more easily measure the isolation between the transmit and receive antennas, the VSWR of the antenna and cable, and the DTF and the electric field strength. There is a purpose.

Wireless network management device having a signal generator and a signal analyzer of the present invention for achieving the above object, in the wireless network management device installed and installed in the wireless repeater to measure the isolation between the transmitting and receiving antennas, the frequency to be measured A signal generator for generating a reference signal by the frequency generator to have a desired size and phase in a band, and a signal analyzer for analyzing the reference signal generated from the signal generator and the signal reflected from the outside are included in the voltage standing wave ratio combining unit. The voltage standing wave ratio combiner is a directional coupler that receives the reference signal generated from the signal generator and separates the reference signal to be transmitted through a forward path and a reverse path, and the reference signal separated by the directional coupler. Part of is transmitted using the forward path, A high frequency switch matrix is provided with a high frequency switch that sets a transmission path so that a part of the reference signal is transmitted by using a reverse path. The signal analyzer includes a high frequency switch matrix of the voltage standing wave ratio combining unit. A frequency converter for converting to an intermediate frequency, an intermediate frequency unit for removing unnecessary signals from the converted signal and passing only a desired frequency component, a power detector for detecting a power intensity of the signal output from the intermediate frequency, and the power detector It consists of a signal analysis control unit for measuring the isolation between the transmitting and receiving antennas by the amount of change.

In addition, a function measuring method using a wireless network management device having a signal generator and a signal analyzer of the present invention for achieving the above object is reflected from the signal generator for generating a reference signal and the reference signal generated from the signal generator from the outside A method for measuring various functional states in a state in which signal analyzers analyzing a transmitted signal are interconnected by a voltage standing wave ratio coupling unit, the frequency band being set and the frequency within the same band as the operating frequency of the installed wireless repeater Generating a reference signal such that the reference signal is maintained, and separating the generated reference signal from the directional coupler and then transmitting the signal to the signal analyzer along a forward path set by a high frequency switch, and a desired frequency band for the signal applied to the signal analyzer. Extraction and calibration with the signal generator This is performed, and the isolation between the calibrated signal and the signal reflected from the antenna through the reverse path set by the high frequency switch and transmitted to the signal analyzer is measured by the signal analysis controller.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing a wireless network management apparatus having a signal generator and a signal analyzer according to a preferred embodiment of the present invention, Figure 2 is a block diagram showing the voltage standing wave ratio coupling portion of FIG.

As shown in FIG. 1, a signal generator 100 and a signal analyzer 130 are provided to measure isolation, VSWR, DTF, electric field strength, etc. between the transmitting and receiving antennas in a wireless relay by spectrum analysis. The generator 100 and the signal analyzer 130 are configured to be coupled to the voltage standing wave ratio combiner 120.

The signal generator 100, the signal issuing control unit 112 for setting the frequency band when the frequency band of the wireless repeater to be measured through the user input unit 111 and the control of the signal generation control unit 112 The frequency generator 113 generates a reference signal to maintain a frequency within the same band as the operating frequency of the wireless repeater based on the set frequency band according to the operation, and the generated reference signal is a voltage standing wave ratio combining unit ( An output unit 114 to be transmitted to the 120, a display unit for displaying the service band and the use frequency band of the wireless relay equipment or in a predetermined form so that the operator can check the data set through the user input unit 111 ( 115, and an interface unit 110 for interfacing with an external device.

In addition, the signal analyzer 130 may display the data manipulated through the user input unit 131 in a predetermined form by the signal analysis control unit 132 to select a measurement target item or set a control process, and an external device. An interface unit 138 for interfacing with a device, an input unit 134 that receives a reference signal from the voltage standing wave ratio combining unit 120, and a reference signal applied to the input unit 134 are mixed to convert the intermediate signal into an intermediate frequency. An intermediate frequency processor 136 and an intermediate frequency processor for removing unnecessary signals by passing through a filter having a desired resolution bandwidth with respect to the intermediate frequency converted by the frequency converter 135 and the frequency converter 135. The power detector 137 for measuring the intensity of the power of the reference signal output from 136 and the power detector 137 are controlled to calibrate the reference signal. ion) and control the high-frequency switching matrix 122 (see FIG. 2) to control the directional path and to measure the isolation degree, VSWR, DTF, electric field strength, etc. between the transmitting and receiving antennas against the reference signal. The signal analysis control unit 132 and a power supply unit 139 for supplying power.

As shown in FIG. 2, the voltage standing wave ratio combiner 120 provides a wideband directional coupler 121 that provides a transmission path such that the reference signals received from the signal generator 110 are transmitted through different paths. And a high frequency switch having at least one high frequency switch, that is, first and second high frequency switches 122a and 122b to set a direction path according to at least one port provided corresponding to the relay equipment to be measured. Matrix 122 is provided.

In the present invention, the port is provided with first and second ports.

In addition, the reference signal separated by the broadband directional coupler 121 is transmitted to the high frequency switch matrix 122 through the forward path (A) and the reverse path (B), wherein the high frequency switch matrix 122 is provided One or more high frequency switches 122a and 122b are configured to be turned on / off by the switching controller 124.

The operation of the present invention configured as described above will be described with reference to FIGS. 1 to 3.

First, a process of measuring the isolation between transmission and reception antennas using a wireless network management apparatus having the signal generator 110 and the signal analyzer 130 of the present invention will be described.

First, the operator checks the service band and the use frequency band of the predetermined wireless communication relay equipment coupled to the first port and the second port of the voltage standing wave ratio combining unit 120 (ST100).

Thereafter, when the operator sets the frequency band to be measured through the user input unit 111, the set frequency band is applied to the signal generation controller 112, and the frequency generator is controlled by the control operation of the signal generation controller 112. 113 generates a reference signal through the output unit 114 (ST102).

The reference signal output from the output unit 114 is applied to the wideband directional coupler 121 of the voltage standing wave ratio combiner 120, and the reference signal is output from the wideband directional coupler 121 to output the signal analyzer 130. The switching control unit 124 turns on the first and second high frequency switches 122a and 122b so as to be transmitted to.

Then, the reference signal is transmitted to the signal analyzer 130 according to the switching operation of the forward path A and the first and second high frequency switches 122a and 122b (ST104).

The reference signal transmitted to the signal analyzer 130 is transferred to the frequency converter 135 through the input unit 134 and converted into an intermediate frequency, and then the frequency applied to the intermediate frequency processor 136 is desired. The unnecessary signal is removed through the filter having the decomposition bandwidth and is sent to the power detector 137 (ST106).

Then, the power detector 137 measures the power strength of the signal, and then the signal analysis controller 132 performs the frequency band set by the signal generator 110 and the signal detected by the signal analyzer 130. Comparing the above, the user input unit 131 is operated to perform a calibration operation (ST108).

On the other hand, after the calibration is completed, the second high frequency switch 122b associated with the second port is driven on by the switching controller 124, so that the signal flowing from the external antenna is signaled along the reverse path B. It is transmitted to the analyzer 130 (ST110).

Therefore, the signal introduced through the reverse path (B) is also transmitted to the signal analyzer 130, the operator can measure the isolation between the transmitting antenna and the receiving antenna for the frequency section to be measured (ST112). .

On the other hand, applying the present invention can measure the VSWR and DTF and the electric field strength of the antenna and the cable.

Here, the reference signal generated by the signal generator 110 is applied to the signal analyzer 130 via the high frequency switch matrix 122, and the signal generator 110 for the frequency band used by the signal analyzer 130. Since the calibration operation is the same as the above-described isolation measurement, description and drawings thereof will be omitted.

First, standing wave-to-voltage ratio refers to the ratio of the voltage amplitude at the maximum voltage point and the voltage amplitude at the minimum voltage point in standing waves from waveguides, coaxial cables, or other transmission lines.

In order to measure the voltage standing wave ratio, when the reference signal generated by the signal generator 110 is transmitted to the voltage standing wave ratio combining unit 120, the wideband directional coupler 121 of the voltage standing wave ratio combining unit 120 is The reference signal is separated.

A part of the separated reference signal is transmitted to the signal analyzer 130 through the first and second high frequency switches 122a and 122b of the high frequency switch matrix 122 and the reference signal transmitted to the signal analyzer 130. The signal is sequentially transmitted to the frequency converter 135, the intermediate frequency processor 136, and the power detector 137, and based on the power strength detected by the power detector 137, the signal generator 110 and the signal analyzer ( 130) Perform a calibration process with each other.

Thereafter, when the second high frequency switch 122b is driven on by the switching controller 124, a part of the reference signal generated from the signal generator 110 and transmitted to the antenna is reflected from the antenna and the second port is transmitted through the second port. It is transmitted to the signal analyzer 130 through the two-frequency switch 122b. The reference signal transmitted through the second high frequency switch 122b is also sequentially transmitted to the frequency converter 135, the intermediate frequency processor 136, and the power detector 137 as described above, and detects the power intensity.

Accordingly, the ratio of the power intensity is calculated by the signal analysis controller 132 based on the power of the calibrated reference signal detected by the power detector 137 and the power intensity reflected from the antenna and transmitted. The standing wave ratio is measured.

Subsequently, when the present invention is applied, the distance to fault (DTF) measurement and the electric field strength can be measured, and the measuring method proceeds in the same way as the above-described isolation measurement and voltage standing wave ratio measurement.

In the distance to fault (DTF) measurement, the reference signal generated by the signal generator 110 is transmitted to the signal analyzer 130 through the wideband directional coupler 121, and the reference signal is transmitted through a signal transmission path, for example, a cable. If the signal is transmitted, the signal is reflected back from the short-circuit or damaged part of the cable, and the signal is returned again. In this case, the return loss and the measured voltage standing wave ratio of the reflected signal are measured and calculated to reflect the portion. Measure the distance and damage condition.

In addition, the electric field strength measurement signal generated by the signal generator 110 is separated from the wideband directional coupler 121 and applied through the first port, and then reflected and transmitted to the second port by the power detector 137. By comparison, the field strength can be measured.

As described above, according to the wireless network management apparatus having the signal generator and the signal analyzer of the present invention and a function measuring method using the same, it is necessary to measure when installing the wireless relay equipment among the functional modules provided in the conventional signal generator and the signal analyzer. By selecting and configuring only the functional modules, and configuring the signal generator and the signal analyzer to be mutually coupled using the voltage standing wave ratio module, it is easy to carry the expensive measurement equipment without measuring expensive measurement equipment in measuring the isolation between the transmitting and receiving antennas in the wireless repeater. There is an effect that can be measured.                     

Furthermore, in addition to the isolation measurement, VSWR, DTF, electric field strength, etc. can be measured by spectrum analysis, thereby reducing the purchase cost according to equipment purchase.

On the other hand, the present invention is not limited to the above-described specific preferred embodiments, anyone of ordinary skill in the art without departing from the gist of the invention claimed in the claims can be variously modified. will be.

Claims (5)

In the wireless network management device installed and installed in the wireless repeater to measure the isolation between the transmitting and receiving antennas, The voltage standing wave includes a signal generator for generating a reference signal by the frequency generator to have a desired magnitude and phase in a frequency band to be measured, and a signal analyzer for analyzing the reference signal generated from the signal generator and the signal reflected from the outside. Interconnected by non-couplings, The voltage standing wave ratio combiner may include a directional coupler configured to receive a reference signal generated from the signal generator and separate the reference signal to be transmitted through a forward path and a reverse path, and a portion of the reference signal separated by the directional coupler may be a forward path. And a high frequency switch matrix having a high frequency switch configured to set a transmission path so that a part of the reference signal is transmitted using a reverse path, The signal analyzer includes a frequency converter for converting the signal applied to the intermediate frequency by the high frequency switch matrix of the voltage standing wave ratio coupling unit, an intermediate frequency unit for removing unnecessary signals from the converted signal and passing only a desired frequency component. Wireless network management having a signal generator and a signal analyzer characterized in that the power detector for detecting the power strength of the signal output from the intermediate frequency, the signal analysis control unit for measuring the isolation between the transmitting and receiving antennas by the amount of change detected by the power detector Device. The method of claim 1, The radio frequency management device having a signal generator and a signal analyzer, characterized in that the high frequency switch is provided with at least one corresponding to the number of ports provided in the voltage standing wave ratio coupling unit according to the wireless repeater to be measured. The method of claim 2, The signal generator and the signal analyzer include a switching controller for controlling the high frequency switch to selectively set or block the transmission path so that the reference signal separated and transmitted by the directional coupler is transmitted to the signal analyzer through a forward path or a reverse path. Wireless network management device having a signal generator and a signal analyzer, characterized in that configured in connection with. In a method for measuring a variety of functional state in the state that the signal generator for generating a reference signal and the signal analyzer for analyzing the reference signal generated from the signal generator and the signal transmitted and reflected from the outside are interconnected by the voltage standing wave ratio coupling unit , Setting a frequency band to be measured and generating a reference signal to maintain a frequency within the same band as the operating frequency of the installed wireless repeater, The generated reference signal is separated from the directional coupler and then transmitted to the signal analyzer along the forward path set by the high frequency switch, Extracting a desired frequency band with respect to the signal applied to the signal analyzer and performing a calibration operation with the signal generator; and And a signal generator and a signal analyzer comprising measuring the isolation between the calibrated signal and the signal reflected from the antenna through the reverse path set by the high frequency switch and then transmitted to the signal analyzer. Function measurement method using a wireless network management device. The method of claim 4, wherein The signal analysis controller processes a desired frequency component by the signal analyzer and calculates the magnitude and phase of the signal reflected through the reverse path to selectively measure VSWR, DTF, and electric field strength. Function measurement method using a wireless network management device having an analyzer.

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