KR102296380B1 - A detection system for dual band inputt-output signal in 5g milimeter wave bandwidth - Google Patents

Abstract

The present invention relates to a detection system for double detecting input/output signals of a fifth-generation millimeter wave band and, more specifically, to detection system for double detecting input/output signals of a 5G millimeter wave band, which separates a transmission signal and a reception signal of a millimeter band RF signal used in a 5G mobile communication network operated in a time division transmission (TDD) method, changes the frequency of each signal up or down to have the same frequency as that of a modem, and enables monitoring or inspection of communication equipment at all times during standby or RF signal transmission/reception. According to the invention, the output of a signal transmitted from and received in a TDD communication device using one antenna for both transmission and reception is accurately detected, thereby providing an effect of monitoring at all times whether the device is operating normally. The detection system comprises a plurality of switches, a plurality of couplers, an RF signal detector, first and second variable attenuators, a plurality of amplifiers, an antenna, a plurality of filters, and first and second mixers.

Description

A DETECTION SYSTEM FOR DUAL BAND INPUTT-OUTPUT SIGNAL IN 5G MILIMETER WAVE BANDWIDTH

The present invention relates to a detection system for double detecting input/output signals of 5G millimeter wave band, and more particularly, a transmission signal of a millimeter band RF signal used in a 5th generation (5G) mobile communication network operated in a TDD method; 5G millimeter wave that separates the received signal, changes the frequency of each signal up or down to have the same frequency as that of the modem, and enables monitoring or inspection of communication equipment at all times during standby or RF signal transmission and reception It relates to a detection system for double-detecting input/output signals of a band.

In a time division duplexing (TDD) communication network that uses the same frequency of uplink and downlink of an RF signal, when a repeater is used for the purpose of resolving a shadow area, the conventional RF repeater operating between a base station and a terminal is a base station transmission time And it works to accurately predict the transmission time of the terminal and activate the downlink from the base station to the terminal and the uplink from the terminal to the base station of the repeater.

The RF repeater can be configured by sharing some downlink and uplink paths, as well as a configuration in which the downlink and uplink are separated. As described above, the donor side and the service side transmit and receive antennas are shared. In addition, the downlink path connects the Sync Detection Module to accurately find the base station and terminal transmission time by referring to the message sent from the base station, and based on this, the downlink and uplink of the RF repeater at the base station and terminal transmission time. In order to activate the , the switch mounted on the path is operated.

However, when transmitting and receiving a transmission signal and a reception signal using a single antenna, a stable repeater operation is possible only when the paths are separated so that each signal is isolated from each other. .

In the case of a millimeter wave band RF signal, it is difficult to detect the transmit signal (TX) and the receive signal (RX) due to the high frequency. A technique for distributing a signal and down-converting an RF signal to be detected to a low frequency to facilitate signal detection has been proposed by the applicant of the present invention.

1 is a block diagram showing the structure of a detection system according to the prior art, FIG. 2 is a block diagram illustrating a flow of a transmission signal in the detection system of FIG. 1, and FIG. 3 is a block diagram illustrating a flow of a received signal in the detection system of FIG. It is a block diagram.

In the transmission path of the RF signal, first, when a synchronization signal and an RF signal are output from the modem 102 , the synchronization signal is input to the control unit 106 and used as a reference for detecting and outputting the RF signal in accordance with the synchronization signal.

And the RF signal transmitted through the transmission path is partially branched while passing through the first coupler 108 , is input to the first divider 116 and the first RF signal detector 118 , and in the first RF signal detector 118 . The detected first detection signal is input to the control unit 106 . The control unit 106 checks the output level of the transmission signal from the first detection signal, compares it with a reference value, and then controls the first variable attenuator 112 to control the input level of the transmission signal.

The first RF signal detector 118 receives the received signal input from the receiving path, and the first RF signal detector 118 checks the output level of the received signal and transmits it to the control unit 106 .

The transmission signal whose output level is controlled by the first variable attenuator 112 increases its output while passing through the first amplifier 120 , and the frequency is up-converted by the local oscillator 128 while passing through the first mixer 124 . do. And after the output is finally amplified by the third amplifier 130, a part of the signal is branched while passing through the third coupler 138 through the circulator 136. The branched partial signal becomes a detection signal for controlling the output of the signal and is input to the third mixer 146 , and the detection signal is converted to the same frequency as the input signal from the modem 102 . And it is input to the second RF signal detector 152 through the second divider 150, and is input to the control unit 106 after passing through the second RF signal detector 152.

With respect to the detection signal extracted from the transmission signal, the control unit 106 detects an output level, and controls the first variable attenuator 112 according to the detected output level to control the output level of the input signal.

On the other hand, in the reception path of the RF signal, when a synchronization signal and an input signal are inputted from the modem 102 , the synchronization signal is inputted to the control unit 106 . The control unit 106 detects the RF signal according to the synchronization signal and controls the output of the RF signal.

A second switch 134 is separately installed on the receive path to protect the receive link during the transmit link. The second switch 134 is located between the circulator 136 and the second mixer 126 for selectively outputting a transmission signal and a reception signal.

In addition, the input signal passing through the fourth coupler 140 connected to the antenna 142 is input to the fourth mixer 148 to down-convert the frequency. Since the input signal passing through the fourth mixer 148 has a low output level, it may be difficult to detect the RF signal, so a fifth amplifier 144 is additionally installed to receive a second RF signal detector 152 even when a low level signal is input. is configured to operate normally.

However, even in such a dual-band sensing system, when the frequency bands of the RF signals are different, the characteristics of the amplifier are different for each band, so it is difficult to implement wideband characteristics.

US 10-2007-0077715 A US 10-2099602 B1

The present invention for solving the above problems branches a part of the transmission signal transmitted from the modem to the antenna, down-converts the frequency in the mixer to convert it to the same frequency as the modem input signal, and inputs it to the control unit to output the transmission signal It controls the operation of the variable attenuator by sensing, and forms a separate path with a switch to match the frequency band of the RF signal in the transmit path and the receive path to install an amplifier suitable for each band characteristic. An object of the present invention is to provide a detection system for detecting a band input/output signal.

The present invention devised to solve the above problems separates the transmission signal and the reception signal of the millimeter band RF signal used in the 5th generation (5G) mobile communication network operated in the TDD method, and the transmission signal and the reception signal are separated. A detection system for monitoring the state of communication equipment by measuring an output level and frequency, comprising: a first switch (206) for selectively determining a transmission path of an RF signal output from a modem (202); a first coupler 210 for transmitting a signal coupled from the RF signal transmitted from the first switch 206 to the control unit 208 and passing the RF signal; A first RF signal detector 220 for generating a first detection signal by detecting the output level and frequency of the signal coupled from the first coupler 210, and transmitting the first detection signal to the controller 208; ; a first variable attenuator 214 for controlling the output level of the RF signal passing through the first coupler 210; a first mixer 226 for up-converting the frequency of the RF signal passing through the first variable attenuator 214 according to the frequency of the signal input from the local oscillator 230; Which of a first transmission path that is a high-frequency transmission signal passage path and a second transmission path that is a low-frequency transmission signal passage path transmits the RF signal whose frequency is increased while passing through the first mixer 226 according to the setting of the control unit 208 ? a second switch 232 and a fourth switch 250 for switching in one path; a second filter 236 and a third amplifier 244 included in the first transmission path; a third filter 238 and a fourth amplifier 246 included in the second transmission path; a circulator (256) for determining a transmission path of the RF signal passing through the second switch (232) and the fourth switch (250); and an antenna 262 for transmitting the RF signal transmitted from the circulator 256 .

a fourth coupler (260) for generating a coupled signal from an input signal received through the antenna (262); a fifth amplifier (248) for amplifying the output level of the RF signal inputted through the fourth coupler (260) and the circulator (256); According to the setting of the control unit 208, the RF signal, whose output level is amplified while passing through the fifth amplifier 248, is passed through a first receiver path that is a low-frequency reception signal passage path and a second receiver path that is a low-frequency reception signal passage path. a third switch 234 and a fifth switch 252 for switching to any one path; a fourth filter 240 included in the first receiving path; a fifth filter 242 included in the second receiving path; A second mixer 228 that down-converts the frequency of the RF signal that has passed through the fifth switch 252 and the third switch 234 sequentially according to the frequency of the signal input from the local oscillator 230 and ; a second variable attenuator 216 for controlling the output level of the RF signal passing through the second mixer 228; A second coupler 212 for generating a coupled signal from the RF signal transmitted from the second variable attenuator 216 and transmitting the signal to the control unit 208 and passing the RF signal through; The signal coupled by the coupler 212 is input to the first RF signal detector 220, and the RF signal passing through the second coupler 212 is input to the first switch 206 .

a third coupler (258) for generating a signal coupled from the RF signal passing through the fourth coupler (260) and passing the RF signal; a third mixer (266) for converting the frequency of the RF signal passing through the third coupler (258) to be the same as the frequency of the RF signal output from the modem (202); a fourth mixer (268) for converting the frequency of the signal coupled by the fourth coupler (260) to be the same as the frequency of the RF signal output from the modem (202); generating a second detection signal by sensing the output level and frequency of an input signal input to the third mixer 266 and the fourth mixer 268, and transmitting the second detection signal to the controller 208 a second RF signal detector 272; wherein the control unit 208 checks the output level of the input signal from the second detection signal, compares the output level with a stored reference value, and the second variable attenuator ( 216) to change the output level of the input signal.

According to the present invention, there is an effect that it is possible to constantly monitor whether the equipment is operating normally by accurately detecting the output of a signal transmitted and received in a time division transmission (TDD) communication equipment using one antenna for both transmission and reception.

In addition, by dividing signals of different frequency bands of millimeter wave bands into high-frequency signals and low-frequency signals, two-band transmission and reception are possible. Independently applied to the receive path, it has the effect of enabling simultaneous transmission and reception of RF signals in TDD communication.

1 is a block diagram showing the structure of a detection system according to the prior art.
FIG. 2 is a block diagram showing the flow of a transmission signal in the sensing system of FIG. 1;
3 is a block diagram illustrating a flow of a received signal in the sensing system of FIG. 1;
4 is a block diagram showing the structure of a sensing system according to an embodiment of the present invention;
5 is a block diagram showing the flow of a high-frequency transmission signal.
6 is a block diagram illustrating a flow of a low-frequency transmission signal.
Fig. 7 is a block diagram showing the flow of a high-frequency reception signal;
8 is a block diagram showing the flow of a low-frequency reception signal.
Fig. 9 is a block diagram showing the flow of a blocking state of a received signal;

Hereinafter, a "sensing system for detecting a dual-band input/output signal of a 5G millimeter wave band" (hereinafter referred to as a 'sensing system') according to an embodiment of the present invention will be described with reference to the drawings.

4 is a block diagram showing the structure of a sensing system according to an embodiment of the present invention, FIG. 5 is a block diagram showing a flow of a high frequency transmission signal, and FIG. 6 is a block diagram showing a flow of a low frequency transmission signal.

The sensing system 200 of the present invention also separates the transmission path and the reception path as in the prior art, and controls the transmission/reception state of the signal by combining the local signal with the transmission signal or the reception signal and the controller 208 checks the output. configured to do

First, the transmission path of the RF signal at the time of transmission will be described.

The RF signal output from the modem 202 is input to the first switch 206 by passing only the RF signal of a specific band by the first filter 204 having a predetermined pass band. The first switch 206 is switched to a transmission mode or a reception mode under the control of the controller 208 to control the path of the RF signal.

When the first switch 206 is switched to the transmission mode, the RF signal is input to the first coupler 210 .

The signal coupled from the RF signal input to the first coupler 210 is input to the first divider 218, and the input coupling signal is input to the first RF signal detector 220 to detect the output level and frequency. used A first detection signal is generated by detecting the output level and frequency, and the first detection signal is input to the control unit 208 . When the first detection signal is input to the control unit 208 , the control unit 208 adjusts the signal output strength of the modem 202 according to the output level of the RF signal.

The RF signal input to the first coupler 210 is input to the first variable attenuator 214 . The control of the first variable attenuator 214 is operated according to a set value in the control unit 208 .

The RF signal passing through the first variable attenuator 214 is input to the first amplifier 222 to amplify the output, and the RF signal with the amplified output is input to the first mixer 226 .

A local oscillator 230 for oscillating and transmitting a local signal is connected to the first mixer 226 . The local signal transmitted by the local oscillator 230 is input to the first mixer 226, is combined with the RF signal input from the first amplifier 222, and is converted into a transmission uplink signal. And the transmission uplink signal is input to the second switch 232 .

The second switch 232 transmits the RF signal by switching to the second filter 236 in the case of a high frequency according to the setting of the controller 208, and switches to the third filter 238 in the case of a low frequency to transmit. As shown in FIG. 5 , the high frequency RF signal passing through the second filter 236 passes through the third amplifier 244 , the output level is amplified, and is input to the fourth switch 250 . On the other hand, as shown in FIG. 6 , the low-frequency RF signal passing through the third filter 238 is input to the fourth switch 250 through the fourth amplifier 246 . The high-frequency transmission signal passing path passing through the second filter 236 and the third amplifier 244 is referred to as a first transmission path, and the low-frequency transmission signal passing path passing through the third filter 238 and the fourth amplifier 246 . is called the second transmission path.

In this way, the control unit 208 selects one of the first transmission path and the second transmission path according to the frequency band of the inputted RF signal.

The fourth switch 250 selects a first transmission path through which a high frequency signal is output or a second transmission path through which a low frequency signal is output according to the control condition of the control unit 208 and transmits the RF signal to the circulator 256 .

The RF signal input to the circulator 256 is input to the third coupler 258 .

A signal coupled from the RF signal input to the third coupler 258 is input to the third mixer 266 . In the third mixer 266, the frequency of the RF signal is down-converted by being combined with the local signal transmitted from the local oscillator 230 . The down-converted RF signal is input to the second divider 270 and then passes through and is input to the second RF signal detector 272 . The RF signal whose output level is detected by the second RF signal detector 272 is input to the controller 208 , and the controller 208 detects the output level of the RF signal transmitted from the antenna 262 .

Then, the RF signal input to the third coupler 258 passes through the fourth coupler 260 and is applied to the antenna 262 to be transmitted from the antenna 262 .

The following describes the reception path of the RF signal at the time of reception.

7 is a block diagram showing the flow of a high frequency reception signal, FIG. 8 is a block diagram showing the flow of a low frequency reception signal, and FIG.

The RF signal received by the antenna 262 is input to the fourth coupler 260 . The signal coupled by the RF signal input to the fourth coupler 260 is input to the sixth amplifier 264, and the RF signal whose output level is amplified by the sixth amplifier 264 is the fourth mixer 268. is entered in

In the fourth mixer 268, the frequency of the RF signal is down-converted by being combined with the local signal transmitted from the local oscillator 230 . The down-converted RF signal is input to the second divider 270 and then passes through and is input to the second RF signal detector 272 . The RF signal whose output level is detected by the second RF signal detector 272 is input to the controller 208 , and the controller 208 detects the output level of the RF signal received through the antenna 262 .

A detection signal generated by the second RF signal detector 272 is defined as a second detection signal.

As such, the first detection signal branching from the output signal and detecting the output and the second detection signal branching from the input signal and detecting the output are both input to the controller 208 . The control unit 208 controls the operation of the first variable attenuator 214 or the second variable attenuator 216 according to the signal levels of the two received detection signals, and accordingly, the signal level of the transmission/reception signal is changed.

The RF signal passed by the fourth coupler 260 is input to the third coupler 258 , and the input RF signal is input to the circulator 256 and then to the sixth switch 254 .

The signal input to the sixth switch 254 has a different transmission/reception path according to the operation state control of the controller 208 . If the sixth switch 254 is in the receiving state, the circuit is switched to be connected to the fifth amplifier 248 . And when it is not in the receiving state, the receiver is protected from damage by switching in the opposite direction of the fifth amplifier 248 so that the RF signal transmitted from the circulator 256 is not input to the receiving path.

In the reception state, the RF signal passing through the sixth switch 254 is input to the fifth amplifier 248, and the output of the signal is amplified. The RF signal input to the fifth amplifier 248 and the output amplified is switched to the fourth filter 240 in the case of a high frequency, and is switched to the fifth filter 242 in the case of a low frequency to the third switch 234. is input

The fifth switch 252 transmits the RF signal by switching to the fourth filter 240 in the case of a high frequency according to the setting of the controller 208, and switches to the fifth filter 242 in the case of a low frequency to transmit. 7 and 8, respectively, the high-frequency RF signal and the low-frequency RF signal that have passed through the fourth filter 240 and the fifth filter 242 by the switching operation of the fifth switch 252 are input to the third switch 234 . As in the previous transmission path, the high-frequency reception signal passing path passing through the fourth filter 240 is referred to as a first receiving path, and the low-frequency receiving signal passing path passing through the fifth filter 242 is referred to as a second receiving path. do.

As described above, the control unit 208 selects one path from among the first and second receive paths according to the frequency band of the input RF signal.

The third switch 234 inputs the RF signal to the second mixer 228 by switching according to a high frequency or a low frequency.

In the second mixer 228, the frequency of the RF signal is down-converted by being combined with the local signal transmitted from the local oscillator 230 . The down-converted RF signal is input to the second amplifier 224 .

The RF signal input to the second amplifier 224 and the output amplified is input to the second variable attenuator 216 . The second variable attenuator 216 changes the attenuation level of the RF signal according to the analysis of the output level of the second RF signal detector 272 .

The RF signal passing through the second variable attenuator 216 is input to the second coupler 212 , and the signal coupled by the RF signal is input to the first RF signal detector 220 through the first divider 218 . .

The RF signal input to the first RF signal detector 220 is used to detect the output level. The signal for which the output level is detected is input to the control unit 208 . When the RF signal is input to the control unit 208, the control unit 208 adjusts the degree of attenuation of the output of the second variable attenuator 216 according to the output level of the RF signal.

The RF signal passing through the second variable attenuator 216 is input to the second coupler 212 . And the RF signal passing through the second coupler 212 is input to the first switch 206, and the first switch 206 switches to the receiving path according to the mode condition of the controller 208 to convert the RF signal to the first filter. Enter as (204). The RF signal input to the first filter 204 is input to the modem 202 by passing only a signal of a necessary band according to the frequency band of the filter.

As described above, in the present invention, as the first switch 206 is switched under the control of the controller 208, a transmission path and a reception path of a signal are selectively formed. In addition, as the second switch 232 and the fourth switch 250 are switched under the control of the controller 208, the first transmission path and the second transmission path are selectively formed.

In addition, as the third switch 234 and the fifth switch 252 are switched under the control of the controller 208, the first and second receiver paths are selectively formed.

Although preferred embodiments of the present invention have been described with reference to the accompanying drawings, the technical configuration of the present invention described above is another specific form for those skilled in the art to which the present invention pertains without changing the technical spirit or essential features of the present invention. It will be understood that it can be implemented as Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the above detailed description, the meaning and scope of the claims, and All changes or modifications derived from the concept of equivalents thereof should be construed as being included in the scope of the present invention.

200: detection system 202: modem
204: first filter 206: first switch
208: control unit 210: first coupler
212: second coupler 214: first variable attenuator
216: second variable attenuator 218: first divider
220: first RF signal detector 222: first amplifier
224: second amplifier 226: first mixer
228: second mixer 230: local oscillator
232: second switch 234: third switch
236: second filter 238: third filter
240: fourth filter 242: fifth filter
244: third amplifier 246: fourth amplifier
248: fifth amplifier 250: fourth switch
252: fifth switch 254: sixth switch
256: circulator 258: third coupler
260: fourth coupler 262: antenna
264: sixth amplifier 266: third mixer
268: fourth mixer 270: second distributor
272: 2nd RF signal detector

Claims (3)

It separates the transmission signal and the reception signal of the millimeter band RF signal used in the 5th generation (5G) mobile communication network operated in the TDD method, and measures the output level and frequency of the transmission signal and the reception signal to determine the state of the communication equipment. As a detection system to monitor,
a first switch 206 for selectively determining a transmission path of an RF signal output from the modem 202;
a first coupler 210 for transmitting a signal coupled from the RF signal transmitted from the first switch 206 to the control unit 208 and allowing the RF signal to pass therethrough;
A first RF signal detector 220 for generating a first detection signal by detecting the output level and frequency of the signal coupled from the first coupler 210, and transmitting the first detection signal to the controller 208; ;
a first variable attenuator 214 for controlling the output level of the RF signal passing through the first coupler 210;
a first mixer 226 for up-converting the frequency of the RF signal passing through the first variable attenuator 214 according to the frequency of the signal input from the local oscillator 230;
Which of a first transmission path that is a high-frequency transmission signal passage path and a second transmission path that is a low-frequency transmission signal passage path transmits the RF signal whose frequency is increased while passing through the first mixer 226 according to the setting of the control unit 208 ? a second switch 232 and a fourth switch 250 for switching in one path;
a second filter 236 and a third amplifier 244 included in the first transmission path;
a third filter 238 and a fourth amplifier 246 included in the second transmission path;
a circulator (256) for determining a transmission path of the RF signal sequentially passed through the second switch (232) and the fourth switch (250);
an antenna 262 for transmitting the RF signal transmitted from the circulator 256;
a fourth coupler (260) for generating a coupled signal from an input signal received through the antenna (262);
a fifth amplifier (248) for amplifying the output level of the RF signal inputted through the fourth coupler (260) and the circulator (256);
According to the setting of the control unit 208, the RF signal, whose output level is amplified while passing through the fifth amplifier 248, is passed through a first receiver path that is a low-frequency reception signal passage path and a second receiver path that is a low-frequency reception signal passage path. a third switch 234 and a fifth switch 252 for switching to any one path;
a fourth filter 240 included in the first receiving path;
a fifth filter 242 included in the second receiving path;
A second mixer 228 that down-converts the frequency of the RF signal that has passed through the fifth switch 252 and the third switch 234 sequentially according to the frequency of the signal input from the local oscillator 230 and ;
a second variable attenuator 216 for controlling the output level of the RF signal passing through the second mixer 228;
A second coupler 212 that generates a coupled signal from the RF signal transmitted from the second variable attenuator 216 and transmits it to the control unit 208, passing the RF signal through; includes;
The signal coupled by the second coupler 212 is input to the first RF signal detector 220 , and the RF signal passing through the second coupler 212 is input to the first switch 206 . A sensing system for detecting a dual-band input/output signal of the 5G millimeter wave band. delete According to claim 1,
a third coupler (258) for generating a coupled signal from the RF signal passing through the fourth coupler (260) and passing the RF signal;
a third mixer (266) for converting the frequency of the RF signal passing through the third coupler (258) to be the same as the frequency of the RF signal output from the modem (202);
a fourth mixer (268) for converting the frequency of the signal coupled by the fourth coupler (260) to be the same as the frequency of the RF signal output from the modem (202);
generating a second detection signal by sensing the output level and frequency of an input signal input to the third mixer 266 and the fourth mixer 268, and transmitting the second detection signal to the controller 208 Including; a second RF signal detector (272);
The control unit 208 checks the output level of the input signal from the second detection signal, compares the output level with a stored reference value, and controls the second variable attenuator 216 to adjust the output level of the input signal. A sensing system for detecting a dual-band input/output signal of a 5G millimeter wave band, characterized in that it changes.

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