KR20080035377A - Carrier shower system - Google Patents

Abstract

A carrier shower system is provided to improve a recognition rate of a tag by transferring a signal for supplying energy of certain strength to the tag although the distance between a reader and the tag is increased. The first and second signal combining units(140,142) combines RF(Radio Frequency) signals received from a tag(300) or a reader(200). A voltage adjusting unit(170) adjusts the voltage of the combined signal to a certain level. A signal conversion unit(150) synthesizes an RF signal transferred from an antenna into an IF(Intermediate Frequency) signal by using the voltage-adjusted signal as an oscillation frequency signal. A signal processing unit(160) processes the IF signal into a digital signal. An RF radiating unit(194) generates an RF signal for an energy supply by using the combined signal. The first antenna(110) receives an RF signal from the tag or the reader. The second antenna(196) is connected with the RF radiating unit and transmits the RF signal for an energy supply.

Description

Carrier shower system

1 is a block diagram schematically showing the components of a typical RFID reader.

2 is a view schematically illustrating a mode in which a general RFID reader and a tag transmit and receive radio waves.

3 is a block diagram schematically illustrating a form in which each component of a carrier shower system according to an embodiment of the present invention is connected through a wired / wireless network.

4 is a block diagram schematically illustrating components of a carrier shower system according to an embodiment of the present invention.

Figure 5 is a schematic diagram showing the specifications of the transmission and reception signals used in the carrier shower system according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

100: carrier shower system 110: first antenna

120: band pass filter 130: the first PAM

140: first signal coupling portion 142: second signal coupling portion

150: signal conversion unit 160: signal processing unit

170: voltage adjusting unit 180: data transmitting and receiving unit

192: second PAM 194: high frequency radiation unit

196: Second antenna 200: leader

300: tag 400: terminal

The present invention relates to a carrier shower system capable of improving the recognition rate of a tag.

Currently, ubiquitous network technology has attracted the attention of many people, ubiquitous network technology means a technology that allows to naturally connect to various networks regardless of time and place.

Examples of such ubiquitous network technology include RFID or USN technology, and among them, RFID technology introduced in commerce is representative.

Ubiquitous sensor network (USN) technology is a network configured to collect information collected from various sensors wirelessly, and it is possible to implement the function of human surveillance by installing hundreds of sensor network nodes in a vulnerable district where human access is difficult. have.

In general, a commercial RFID system consists of an RFID tag attached to a product and embedded with details, an RFID reader that reads information of the RFID tag using RF communication, and the RFID tag attached to the product is located at which the RFID reader is located. As it passes the region and transmits the information using RF communication, it provides a foundation for efficient logistics / distribution management such as product distribution, assembly, price change, and sales.

1 is a block diagram schematically showing the components of a general RFID reader 10.

Referring to FIG. 1, a general RFID reader 10 includes an antenna 11, a signal separator 12, an RF receiver 13, a baseband receiver 14, an Rx phase locked loop (PLL) 15, and an RF transmitter. (16), the baseband transmitter 17, the Tx PLL 18, and the controller 19.

The transmit / receive signal separator 12 separates the transmitted signal from the received signal and transmits the transmitted signal to the antenna 11 or transmits the received signal to the RF receiver 13, for example, a device such as a circulator. Can be implemented.

In addition, the baseband receiver 14 receives the reference frequency signal from the Rx PLL 15 and converts the RF received signal into a baseband signal, and the baseband transmitter 17 receives the reference frequency signal from the Tx PLL 18. Received to convert the baseband signal transmitted from the control unit 19 to an RF transmission signal.

FIG. 2 is a diagram schematically illustrating a general RFID reader 10 and tags 20 and 21 transmitting and receiving radio waves. As shown in FIG. 2, when the RFID reader 10 transmits an information request signal, the tag 20 is transmitted. 21 has a communication form for transmitting tag information. In this case, a signal from the tag 21 exceeding the reading distance does not reach the RFID reader 10 and leaks.

In addition, the tag 21 receives the energy supply signal from the RFID reader 10 and uses it as electric power for transmitting radio waves. As the tag 21 moves away from the RFID reader 10, the strength of the energy supply signal is increased. Is lowered, and the tag 21 cannot transmit tag information with sufficient power.

Therefore, even when the tag information is received from the tag 21, the RFID reader 10 may not be able to accurately interpret the signal.

When the signal of the tag is leaked or the signal for energy supply is weak, the RFID reader 10 cannot generate accurate logistics information, and in order to prevent such cases, a larger number of RFID readers 10 must be disposed. In this case, there is a problem in that radio interference between the readers 10 is severely generated, thereby lowering a tag recognition rate and a recognition distance and forming a complex network.

In other words, the reading distance and the transmission distance of the energy supply signal are limited so that the recognition rate of the tag does not reach 100%. Therefore, the hardware resource of the RFID reader for network connection configuration is compensated for by the more complicated system configuration. There is a problem that the increase in software resources and the installation cost increases.

The present invention provides a carrier shower system that improves the recognition rate of a tag.

In addition, the present invention is to process the tag information that is not detected through the minimized circuit configuration and network connection configuration, and improve the recognition rate of the tag by efficiently transmitting the signal for supplying energy to the tag and efficiently integrate the information of the tag. It provides a carrier shower system that can be.

In addition, the present invention provides a carrier shower system that does not generate mutual interference even when a plurality of RFID transceivers including a reader and a tag are disposed in improving a tag recognition rate and a recognition distance.

The carrier shower system according to the present invention comprises a signal coupling unit for coupling a high frequency signal received from a tag or a reader; A voltage adjusting unit adjusting the voltage of the coupled signal to a predetermined level; A signal converter for synthesizing a high frequency signal transmitted from the antenna into an intermediate frequency signal using the voltage adjusted signal as an oscillation frequency signal; A signal processor which processes the intermediate frequency signal into a digital signal; And a high frequency radiation unit generating a high frequency signal for energy supply using the coupled signal.

Hereinafter, a carrier shower system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The carrier shower system is a device constituting an RFID system with a reader and a tag, and leaks when the reader and the tag perform communication. It performs the function to receive and process complementary signals. Of course, the carrier shower system according to the present invention can also be used in the USN system.

3 is a block diagram schematically illustrating a form in which each component of the carrier shower system 100 according to an exemplary embodiment of the present invention is connected through a wired / wireless network.

Referring to FIG. 3, the carrier shower system 100 according to an embodiment of the present invention communicates with the reader 200 and the tag 300, and is located outside the terminal 400 through the first wired / wireless network 500. ). In addition, the terminal 400 is connected to the reader 200 through the second wired / wireless network 600.

The tag 300 is attached to an article and transmits tag information including article information, and the reader 200 is installed in a moving region of the article, such as a conveyor system or a vehicle gate region, and sends an information request signal to the tag 300. Transmits the tag information from the tag 300 and processes it.

In this case, a signal transmitted from the reader 200, for example, an information request signal may be leaked without being delivered to the tag 300, or a sufficient energy supply signal may not be transmitted from the reader 200. The carrier shower system 100 may provide an energy supply signal to the tag 300 on behalf of the reader 200, receive a leaked signal among signals transmitted from the reader 200, and transmit the received signal to the tag 300. have.

In addition, when tag information is received from the tag 300, the tag information may be processed and provided to the terminal instead of the reader. According to the carrier shower system 100 according to the present invention, the recognition rate and the recognition distance of the tag 300 may be improved. You can do it.

The terminal 400 receives tag information from the carrier shower system 100 according to the present invention and delivers the tag information to the reader 200, or receives tag information from the reader 200 and the carrier shower system 100 together. It is a computer system with integrated management program that can handle.

For example, the terminal 400 extracts the item information, and calculates the time information (that is, the time information on which the item to which the tag 300 is attached has passed through a predetermined area), the quantity information of the item, etc. Payment can be processed.

According to this connection configuration, the signal transmitted from the tag 300 can be detected at the same time in the reader 200 and the carrier shower system 100 according to the present invention, the reader 200 and the carrier shower system 100 at the same time Since the energy supply signal can be transmitted, the surveillance area of the tag 300 is extended and the transmission distance is long.

The carrier shower system 100, the reader 200, and the terminal 400 according to the present invention may be provided in plural numbers according to the installation environment. However, in the exemplary embodiment of the present invention, the carrier shower system 100, the reader 200, and the terminal 400 are provided one by one.

The first wired / wireless network 500 and the second wired / wireless network 600 are Wi-Fi (Wireless LAN), Ultra Wide Band (UWB), Bluetooth, Bluetooth, World Interoperability for Microwave Access (WiMax), Zigbee (Zigbee). , A wireless network such as dedicated short range communication (DSRC) or a wired network such as a universal asynchronous receiver / transmitter (UART), the Internet (TCP / IP), a switch hub, a serial / parallel cable, or the like.

In the embodiment of the present invention, the first wired / wireless network 500 and the second wired / wireless network 600 are implemented using UART technology (hereinafter, referred to as "first UART network" and "second UART network"). ).

Referring to FIG. 3, a carrier shower system 100 according to an exemplary embodiment of the present invention includes a first antenna 110, a band pass filter (BPF) 120, a first amplifier 130, The first signal combiner 140, the second signal combiner 142, the signal converter 150, the signal processor 160, the voltage adjuster 170, the data transmitter / receiver 180, and the second amplifier 192. ), Including a high frequency radiation unit 194 (Power Carrier Shower) and the second antenna 196, looking at the function of each component as follows.

The first antenna 110 receives a radio frequency (RF) signal from the tag 300 or the reader 200, and the second antenna 196 is a high frequency signal for supplying energy to the tag 300 (hereinafter, For example, a dipole antenna, a monopole antenna, a microstrip antenna, a patch antenna, or the like may be used.

The bandpass filter 120 performs a function of passing a frequency signal of a band allocated to an RFID communication channel and blocking a signal of a neighboring component or a signal of a noise component.

Carrier shower system 100 according to the present invention is configured using a minimum circuit in processing a tag signal that the reader 200 has not received, in particular the oscillation frequency for generating the received high frequency signal, the intermediate frequency signal It is used as a signal, and it is characterized by not having a separate phase synchronization circuit.

The carrier shower system 100 according to the present invention provides an energy signal or reader information including an energy signal to the tag 300 in place of the reader 300, and then processes the received tag information to the terminal 400. It can be provided (at this time, the tag information is transmitted through the data transmission and reception unit 180 and the first UART network 500).

The high frequency signal received through the first antenna 110 is transmitted to the signal conversion unit 150, which is branched (coupled) through the first signal coupling unit 140, and the branched high frequency signal is a voltage adjusting unit ( 170 is adjusted to the oscillation frequency signal is passed to the signal conversion unit 150.

Therefore, the signal conversion unit 150 generates an intermediate frequency signal by synthesizing the high frequency signal transmitted as it is and the high frequency signal transmitted through the voltage adjusting unit 170.

The first amplifier 130 amplifies the high frequency signal transmitted from the band pass filter 120 to a voltage level large enough to be coupled to the first signal combiner 140.

The first signal combiner 140 couples the high frequency signal transmitted from the first amplifier 130 to the signal converter 150 to the voltage adjuster 170, and the voltage adjuster 170 couples the coupling. The voltage of the signal is adjusted to a predetermined level and transferred to the signal converter 150.

The signal conversion unit 150 synthesizes / demodulates the intermediate frequency signal and transmits the intermediate frequency signal to the signal processing unit 160, and the signal processing unit 160 processes the intermediate frequency signal into a digital signal. Or tag information is processed as follows.

First, the signal processed first is reader information, and the signal processor 160 interprets the digital signal as reader information and transmits the digital signal to the high frequency radiation unit 194. The reader information is information including an information request signal and includes synchronization information complying with an RFID signal standard.

Accordingly, the high frequency radiation unit 194 may transmit the energy signal available in the tag 300 to meet the RFID signal standard using the synchronization information.

In addition, the high frequency radiation unit 194 may transmit not only an energy signal but also reader information on an RFID signal standard.

In this case, the signal processor 160 transmits the control information together with the reader information to the high frequency radiation unit 194, and whether the signal processor 160 interprets the reader information to provide an energy signal to the tag 300 or not. Determine and generate control information accordingly.

That is, the high frequency radiation unit 194 may determine whether to supply an energy signal according to the control information, and adjust the transmission timing of the energy signal (or reader information including the energy signal) based on the synchronization information.

In addition, the control information may be used as a signal for removing noise (command signal of the reader 200) of the signal transmitted to the high frequency radiation unit 194.

Second, when the first case is processed and the tag 300 receives an energy signal (or reader information including the energy signal), and thus transmits tag information, the signal processor 160 interprets the digital signal as tag information. Then, it is transmitted to the data transmission and reception unit 180.

In this case, the signal processing unit 160 may include a storage means (memory), and stores the tag information in the storage means, and extracts tag information when there is a data request from the terminal 400, and then transmits and receives the data. Can be delivered to.

The data transmission and reception unit 180 is connected to the terminal 400 through the first UART network 500, the terminal 400 receives tag information from the data transmission and reception unit 180, the second UART network 600 Statistics / payment process with tag information delivered through Accordingly, according to the carrier shower system 100 according to the present invention, it is possible to prevent a case in which a tag that is not recognized among the tags 300 to be moved is generated.

The second signal combiner 142 couples the high frequency signal (which is a signal received from the reader) flowing from the first signal combiner 140 to the signal converter 150 to form the second amplifier 192. ), And the second amplifier 192 amplifies the coupled signal to a power level of a predetermined magnitude, where the amplified signal is a signal used to generate an energy signal, for example, 0 dBm to 15 dBm of power. It is good to have a level.

The signal amplified by the second amplifier 192 is transferred to the high frequency radiator 194, converted into an energy signal, and transmitted through the second antenna 196.

Therefore, since the tag 300 may receive an energy signal from the reader 200 and the carrier shower system 100 installed at other locations, the tag 300 may transmit the tag information with a stable output.

As described above, when the high frequency radiation unit 196 transmits the reader information, the high frequency radiation unit 196 includes an amplifier, a switch circuit, and the like. By processing the transmitted baseband (digital signal) together, the reader information including the energy signal may be transmitted to the tag 300.

Hereinafter, each component of the carrier shower system 100 according to the exemplary embodiment of the present invention will be described in more detail with reference to FIG. 4, and the description of the components described with reference to FIG. 3 will be omitted.

4 is a block diagram schematically illustrating components of a carrier shower system 100 according to an embodiment of the present invention.

Referring to FIG. 4, the carrier shower system 100 according to an exemplary embodiment of the present invention may include a first antenna 110, a bandpass filter 120, and a first amplifier (hereinafter, referred to as “first PAM”). 130, the first signal combiner 140, the second signal combiner 142, the signal converter 150, the signal processor 160, the voltage adjuster 170, the data transmitter and receiver 180, It includes a second PAM 192, a high frequency radiation unit 194 and a second antenna 196, the signal conversion unit 150 is a first mixer 152, a second mixer 154 and a demodulator 156 It is configured to include). In addition, the voltage adjusting unit 170 includes a third PAM 172, a third signal coupling unit 174, and a log amplifier 176.

The first signal combiner 140 is connected between the first PAM 130 and the second signal combiner 142 and couples the high frequency signal flowing from the first PAM 130 to the second signal combiner 142. The first signal combiner 140, the second signal combiner 142, and the third signal combiner 174 are, for example, coupled capacitors. (coupling capacitor) or a directional coupler (directional coupler).

For example, when the signal coupling units are implemented as a coupling capacitor, a dielectric having a predetermined dielectric constant may be provided to couple the signal without damaging the original high frequency signal on the transmission path.

In addition, when implemented as a directional coupler, a waveguide may be used, and four ports, that is, an input port, a passing port, and an output port (a capacitor connected to block a DC component from flowing into the signal conversion unit) and an isolation port are used. (Is connected to the ground terminal via a resistor and isolates the signal of the reflective component).

The coupled high frequency signal is transmitted to the third PAM 172 of the voltage adjusting unit 170, and the third PAM 172 gains the coupled high frequency signal and stabilizes the voltage at a predetermined level.

The stabilized signal may be transmitted to the signal conversion unit 150 to be used as an oscillation frequency signal, thus eliminating the need for a separate phase synchronization circuit implemented as an expensive and complicated circuit.

In this case, a third signal combiner 174 is connected between the third PAM 172 and the signal converter 150, and the third signal combiner 174 couples the output signal of the third PAM 172. Transfer to the log amplifier 176.

The log amplifier 176 outputs a coupling signal in an analog state as a DC voltage signal so that the signal processor 160 can detect the voltage level. The DC amplifier signal is directly proportional to the decibel value of the coupled high frequency signal. By outputting the signal, the signal sensitivity of the power level that can be received can be extended.

The DC voltage signal generated by the log amplifier 176 is transmitted to the signal processor 160, and the signal processor 160 generates a gain control signal by comparing the DC voltage signal with a preset reference voltage level.

At this time, the reference voltage level is a changeable value. Since the signal analysis is possible only when the strength of the signal received from the reader 200 and the strength of the signal received from the tag are matched, the reference voltage level is received from the reader 200. Adjusted according to the strength of the signal being

The signal processor 160 transmits a gain control signal to the third PAM 172, and the third PAM 172 can amplify the high frequency signal into a stabilized oscillation frequency signal by the gain control signal.

Meanwhile, the high frequency signal (hereinafter, referred to as an "oscillation frequency signal") transmitted from the third PAM 172 is supplied to the first mixer 152 and the second mixer 154 of the signal converter 150, and the second The first mixer 152 and the second mixer 154 respectively generate the high frequency signals transmitted from the oscillation frequency signal and the first PAM (via the first signal combiner 140 and the second signal combiner 142) 130. The synthesized signal is generated as an intermediate frequency signal, that is, an I (In phase) signal and a Q (Quadrature phase) signal.

The intermediate frequency signal generated through the first mixer 152 and the second mixer 154 is converted into a digital signal through the demodulator 156, and the converted digital signal is transmitted to the signal processor 160.

The signal processor 160 may use a Field Programmable Gate Array (FPGA) circuit or a digital signal processing (DSP) circuit to add programming as needed out of a chip production process. A converter (not shown).

The AD converter converts the signal transmitted from the demodulator 156 or the log amplifier 176 into the form of a digital signal that can be processed by the main operation circuit.

The AD converter is implemented as a comparator having a positive feedback structure in order to minimize the SNR (Signal to Noise Ratio), and in order to sufficiently reduce the noise effect of the main operation circuit, the AD converter is a positive feedback OP amplifier for the hysteresis phenomenon. Is designed.

In addition, the signal processing unit 160 includes a kernel to provide an interface with each component including the data transmission / reception unit 180, to process an interrupt, and to assign a request processing time and an operation rank to each component sequentially. To work. The signal processor 160 controls data input / output by managing addresses of storage means.

In particular, the signal transmitted from the tag 300 corresponds to the information request signal initially requested from the reader 200, and must comply with the RFID signal standard. Therefore, the signal processing unit 160 may receive the signal from the reader 200. Tag information is generated by analyzing the signal specification of the received reader information.

5 is a diagram schematically showing the specifications of the transmission and reception signals used in the carrier shower system 100 according to an embodiment of the present invention.

In FIG. 5A, the section “A” and the section “E” are sections in which the reader 200 monitors whether the tag 300 has entered the communication area, and section “B” is a reader 200. ) Is an interval for transmitting the information request signal.

In addition, the section "C" is a section in which the tag 300 transmits a response signal according to the information request signal, and the section "D" is a section in which full tag information is transmitted after the response signal is transmitted.

FIG. 5B is an enlarged view of the section “B” shown in FIG. 5A. In FIG. 5B, the section “B1” is a section in which a preamble signal is transmitted, and the section “B2”. The section "section" is the section in which the information data signal is transmitted, and the section "B3" is the section in which the transmission end signal is transmitted.

In addition, the section “B4” refers to a section of the energy supply signal transmitted from the reader 200 to supply power to the tag 300.

Therefore, the signal processor 160 analyzes the signal received from the reader 200 and performs a function of synchronizing data timing according to the signal standard described with reference to FIG. 5. For example, the tag information is referred to as “D”. Synchronized according to the signal specification of the section.

As mentioned above, as a result of analyzing the signal received from the reader 200, if there is a request for leaked tag information, the signal processor 160 receives the corresponding tag information and transmits it to the data transmitter / receiver 180. do.

On the other hand, when the signal amplified from the second amplifier 192 is delivered, the high frequency radiation unit 194 generates an energy signal, including an amplifier and a switch (not shown), the signal processor 160 in the RFID It receives the synchronization information generated according to the signal specification and transmits the energy signal.

For example, the energy signal may be transmitted in synchronization with the “B4” section.

In addition, since the transmission power levels of the reader 200 and the tag 300 should correspond to the RFID signal standard, the high frequency radiator 194 receives power level information of the high frequency signal received from the signal processor 160. Using this, the power of the energy signal is adjusted.

The power level information is generated by using the DC voltage signal transmitted from the log amplifier 176 of the voltage adjusting unit 170 as described above, and similarly to the control of the third PAM, the signal processing unit 160 controls the high frequency radiation unit. By controlling the gain amplifier (included in the amplifier stage) in 194, the power output of the energy signal can be adjusted.

In addition, the tag information generated by the signal processing unit 160 is transmitted to the terminal 400 or the reader 200 through the data transmission and reception unit 180.

The data transmitter / receiver 180 is a kind of UART access device, and constitutes a first UART (Universal Asynchronous Receiver / Transmitter) network 500, and provides tag information through the first UART network 600. Transfer to the terminal 400.

For reference, although not shown in the drawing, the terminal 400 and the reader 200 may also include a UART connection device to configure a second UART network 600.

The UART connection device is a microchip equipped with a program for controlling an interface with a serial device connected to a processor. The UART connection device provides an RS-232C DTE interface to the signal processor 160 to enable data transmission and reception with the serial devices.

The UART ports are connected via mutual RS-232 cables and operate in synchronous mode (half duplex transmission and reception) and asynchronous mode (full duplex transmission and reception) with serial control registers, serial status registers, and transmit and receive buffers.

The signal analysis unit 420 of the terminal 400 is a kind of a program (Middleware) that processes tag information on a software mac layer and an application program layer to aggregate and statistically process the information. The terminal 400 and the reader 200 ) Is connected via the second UART network 600.

The signal analyzer 420 may share tag information through the second UART network 600.

Although the present invention has been described above with reference to the embodiments, these are only examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains may have an abnormality within the scope not departing from the essential characteristics of the present invention. It will be appreciated that various modifications and applications are not illustrated. For example, each component specifically shown in the embodiment of the present invention can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

According to the carrier shower system according to the present invention, since the tag signal which is not detected by the reader can be received at another position and integrated with the tag information processed by the reader, the recognition rate of the tag can be improved. .

In addition, according to the present invention, even if the distance between the reader and the tag is far away, since the energy supply signal of a certain intensity can be transmitted to the tag, the recognition rate of the tag can be improved.

In addition, according to the present invention, it is possible to extend the recognition distance of the tag and to extend the application area of the RFID network through a simple system configuration.

In addition, according to the present invention, there is an effect that a simplified and inexpensive carrier shower system can be realized by using a minimum of circuit elements including a phase synchronization circuit.

Claims (17)

A signal coupling unit coupling a high frequency signal received from a tag or a reader; A voltage adjusting unit adjusting the voltage of the coupled signal to a predetermined level; A signal converter for synthesizing a high frequency signal transmitted from the antenna into an intermediate frequency signal using the voltage adjusted signal as an oscillation frequency signal; A signal processor which processes the intermediate frequency signal into a digital signal; And And a high frequency radiator configured to generate a high frequency signal for energy supply using the coupled signal. The method of claim 1, A first antenna for receiving a high frequency signal from the tag or the reader; And And a second antenna connected to the high frequency radiator to transmit the high frequency signal for energy supply. The method of claim 1, wherein the signal coupling unit A first signal coupling unit connected to the voltage adjusting unit; And And a second signal coupling unit connected to the high frequency radiation unit. The method of claim 1, The voltage adjusting unit includes: an amplifier for gain amplifying the coupled signal; And a second signal coupling unit coupled to an output terminal of the amplifying unit and coupling the amplified signal. The signal processor receives the coupled signal from the second signal combiner to determine the strength of the signal, and generates a gain control signal and delivers to the amplifier. The method of claim 4, wherein the voltage adjusting unit And a log amplifier converting the signal coupled by the second signal combiner into a DC signal of a predetermined level and transferring the converted DC signal to the amplifier. The method of claim 1, wherein the signal conversion unit A carrier shower system comprising at least one mixer. The method of claim 1, wherein the signal conversion unit And synthesizing the high frequency signal into an intermediate frequency signal in an I (In phase) signal and a Q (Quadrature phase) signal state. The method of claim 1, And a band pass filter connected to the front end of the signal combiner. The method of claim 1, Carrier shower system comprising an amplifier connected to the front end of the signal coupling. The method of claim 1, And a data transmission and reception unit for transmitting the digital signal transmitted from the signal processor to an external terminal connected through a wired or wireless network. The method of claim 1, wherein the signal processing unit A carrier shower system comprising an analog to digital converter (ADC). The method of claim 1, wherein the signal processing unit Processing the signal received from the reader to generate reader information, And analyzing the synchronization information included in the reader information, and then processing the signal received from the tag into a digital signal by the synchronization information. The method of claim 12, wherein the high frequency radiation unit Receiving the synchronization information from the signal processing unit, and using the synchronization information, the carrier shower system, characterized in that for transmitting the high frequency signal for energy supply to meet the standard of the RFID transmission and reception signal. The method of claim 1, wherein the signal processing unit Processing the signal received from the reader to generate reader information, And interpreting the reader information, determining whether to transmit the high frequency signal for energy supply to the tag, and transmitting a control signal to the high frequency radiator. The method of claim 1, wherein the signal conversion unit And a demodulator for demodulating the analog signal into a digital signal. The method of claim 1, And a storage unit configured to receive tag information from the signal processor and to store the high frequency signal from the tag. The method of claim 12, wherein the high frequency radiation unit And receiving the leader information from the signal processor and transmitting the leader information together with the high frequency signal for energy supply.

Images