KR20060000425A - Antenna for rfid transponder and transponder using the antenna - Google Patents

Antenna for rfid transponder and transponder using the antenna Download PDF

Info

Publication number
KR20060000425A
KR20060000425A KR1020040049285A KR20040049285A KR20060000425A KR 20060000425 A KR20060000425 A KR 20060000425A KR 1020040049285 A KR1020040049285 A KR 1020040049285A KR 20040049285 A KR20040049285 A KR 20040049285A KR 20060000425 A KR20060000425 A KR 20060000425A
Authority
KR
South Korea
Prior art keywords
antenna
transponder
antenna element
impedance
impedance matching
Prior art date
Application number
KR1020040049285A
Other languages
Korean (ko)
Other versions
KR100603617B1 (en
Inventor
김창주
손해원
윤재훈
채종석
최원규
표철식
Original Assignee
한국전자통신연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to KR1020040049285A priority Critical patent/KR100603617B1/en
Publication of KR20060000425A publication Critical patent/KR20060000425A/en
Application granted granted Critical
Publication of KR100603617B1 publication Critical patent/KR100603617B1/en

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2225Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773Antenna details
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support

Abstract

1. TECHNICAL FIELD OF THE INVENTION
The present invention relates to an antenna for transmitting and receiving radio waves and a transponder using the same.
2. The technical problem to be solved by the invention
The present invention implements the impedance matching unit in the center of the antenna element having a symmetrical structure, thereby providing a bipolar polarization or multi-frequency band operation characteristics that the conventional letter-shaped radio frequency identification antenna does not provide, radio identification antenna for transmission and reception And a transponder using the same.
3. Summary of Solution to Invention
The present invention, a substrate; An antenna element printed on the substrate in symmetrical form to transmit and receive radio waves; And an impedance matching unit integrally installed with the antenna element and configured to match impedance in order to maximize transmission efficiency of the electric wave.
Character Antenna, Feeder, Impedance Match, Transponder

Description

Antenna for transmitting and receiving radio frequency identification and transponder using same {Antenna for RFID transponder and transponder using the antenna}             

1 is a view showing an embodiment of implementing an antenna for transmitting and receiving radio waves using the letter "C" according to the present invention;

FIG. 2 is a diagram illustrating S11 parameter characteristics of an antenna for transmitting and receiving radio wave identification of FIG. 1; FIG.

3 is a Smith chart showing an input impedance of an antenna element by the impedance matching unit of FIG. 1;

4 is a diagram illustrating an embodiment of implementing an antenna for transmitting and receiving radio waves using the alphabet "H" according to the present invention;

FIG. 5 is a view illustrating S11 parameter characteristics of an antenna for transmitting and receiving radio wave identification of FIG. 4; FIG.

FIG. 6 is a Smith chart showing an input impedance of an antenna element by an impedance matching section in FIG. 4;

7 is a view showing an embodiment of implementing an antenna for transmitting and receiving radio wave identification using the letter "N" according to the present invention;

8 is a view showing an embodiment of implementing an antenna for transmitting and receiving radio waves using the alphabet "S" according to the present invention;

9 is a view showing an embodiment of implementing an antenna for transmitting and receiving radio waves using the alphabet "Z" according to the present invention;

10 is a view showing an embodiment for implementing an antenna for transmitting and receiving radio waves using the Roman numeral "1" according to the present invention;

11 is a view illustrating an embodiment of a transponder using an antenna for transmitting and receiving a radio frequency identification operating in a bipolar polarization according to the present invention;

12 is a view showing another embodiment of implementing a transponder using an antenna for transmitting and receiving a radio frequency identification operating in a bipolar polarization according to the present invention;

FIG. 13 is a view illustrating an embodiment of a transponder using an antenna for transmitting and receiving a radio frequency identification operating in a triple frequency band according to the present invention; FIG.

14 is a view showing an embodiment of a transponder using an antenna for transmitting and receiving radio frequency identification operating in a dual frequency band according to the present invention;

FIG. 15 is a diagram illustrating an embodiment of a transponder using an antenna for transmitting and receiving radio waves for simultaneously providing dual frequency band and dipole polarization according to the present invention.

* Explanation of symbols for the main parts of the drawings

10, 50: substrate 20, 60: antenna element

30, 70: chip 40, 80: impedance matching unit

The present invention relates to an antenna for transmitting and receiving radio waves and a transponder using the same, and more particularly, to an antenna for transmitting and receiving radio waves and a transponder using the same for providing bipolar polarization or multi-frequency band operation characteristics.

Transponder is a compound word of Transmitter and Responder, but transponder is recently composed of memory, integrated card (IC) circuit, antenna, etc. It is used to refer to an RFID tag (card) of a radio frequency identification (RFID) system for storing.

Radio Frequency Identification (RFID) systems are a technology developed to overcome the shortcomings of barcodes and magnetic cards. They can process data read from transponders, transponders (RFID tags or cards), interrogators, and readers. Consists of a data processing system.

Radio frequency identification (RFID) systems operate by continuously radiating radio waves from the internal antenna of the reader, and when the transponder is within the radio range, the stored unique information data is transmitted to the reader through the built-in antenna.

At this time, since the power efficiency of the reader is very sensitively determined according to the position of the transponder, when the reader is directed to the position where the transponder is located, the transponder can be operated with low power. Therefore, information about the location of the transponder is very important in a radio frequency identification (RFID) system.

In addition, if the user using the reader in the radio frequency identification (RFID) system can predict the polarization of the antenna for transmitting and receiving the radio frequency signal embedded in the transponder, the polarization direction of the reader and the transponder polarization direction may be matched to maximize power transfer. Can be. Therefore, if the antenna for transmitting and receiving a letter type radio identification provides bipolar polarization, it is possible to eliminate the user's inconvenience in predicting the polarization.

A transponder (RFID tag or card) can be classified into a magnetic field transponder, an electric field transponder, and an electromagnetic field transponder according to a magnetic field, an electric field, and an electromagnetic field, which are physical quantities that transmit energy or RF (Radio Frequency) signals.

Magnetic field transponders are mainly used in places where the effective operating distance is short, using a low impedance field formed near a closed type antenna, such as a loop antenna.

Electric field transponders are also used in places where the effective working distance is short, by using a high impedance field formed near an open type antenna, such as a dipole antenna.

At this time, the magnetic field transponder has a small antenna size and excellent energy transfer efficiency compared to the electric field card, and is widely used at low frequencies.

Electromagnetic transponders have a long effective operating distance, using a field where the electric and magnetic fields are perpendicular to the direction of propagation, with a ratio of 377 ohms (propagation impedance).

At this time, when looking at the frequency band of each country of the electromagnetic transponder, 433MHz band shows a narrow band frequency distribution of 433.050 ~ 434.790MHz band, 900MHz band 860 ~ 960MHz (Europe: 865 ~ 868MHz, USA: 902 ~ 928MHz, Japan) : 950 to 956 MHz, Korea: 910 to 914 MHz) The band has a broadband frequency distribution up to 100 MHz. The 2.4 GHz band used in Europe has a relatively narrow band frequency distribution of 2.4 to 2.48 GHz bands in most countries, and also has a narrow band distribution of 5.275 to 5.75 GHz band in the 2.8 GHz band used in Europe.

In other words, the frequency of transponder using electromagnetic coupling can be classified into 433MHz band, 900MHz band, 2.4GHz band, and 2.8GHz band, and in most countries, considering the interference with wireless communication, It requires the use of a working reader.

Therefore, in order to use the same transponder in all countries, a transponder having a multi-frequency operation characteristic is required.

On the other hand, transponders have built-in memory, IC circuits, antennas, etc. Recently, printed antennas made by printing conductive inks such as gold, silver, and copper on printed paper are used for transponder antennas (hereinafter, referred to as antennas for transmitting and receiving radio waves). It is used).

Antennas produced using the printing technique can be divided into non-letter antennas and letter antennas according to their shape.

Non-lite antennas cannot provide visual information, but there are no limitations in the design of the antenna, providing a variety of functions such as high gain, omni-directional, multi-frequency band characteristics, and dipole polarization characteristics. In addition, an antenna with an impedance matching unit may be implemented.

In addition to providing identification information through electromagnetic physical quantities, the character antenna provides character information that can be directly recognized by the naked eye.

In addition, if a common name, a product name, a company logo, etc., which are located in a place where customers can be easily recognized, are used for the letter antenna, the letter antenna may provide not only text information but also antenna location information.

Therefore, as described above, in the radio frequency identification (RFID) system in which the position of the transponder determines the power efficiency, a character antenna using a brand name, a product name, a company logo, etc. is used as an antenna for transmitting and receiving a radio frequency identification embedded in the transponder. Reader users can easily locate the transponder and operate the transponder at low power.

On the other hand, US Patent No. 6,320,556 in this regard provides a character antenna as an antenna for transmitting and receiving radio wave identification. In the US patent, a feed terminal is installed between two symmetrical characters (for example, "OO") to implement an antenna for transmitting and receiving character type radio waves.

Therefore, the US patent for providing a character-type antenna as an antenna for radio wave identification transmission and reception provides text information that can be directly recognized by the naked eye that the non-letter antenna can not only provide identification information through an electromagnetic physical quantity.

However, the antenna itself does not have a built-in impedance matching circuit, it is difficult to apply to a word having a small number of two consecutive letters consisting of a limited number of characters, such as company name or brand name.

In addition, as described above, the transponder must have a bipolar polarization characteristic for eliminating the hassle of reader users predicting polarization and a multi-frequency operation characteristic for use in all countries.

However, there is a technical problem in providing a bipolar polarization characteristic and a multi-frequency band operation characteristic of a US patent for providing a character antenna as an antenna for radio wave identification transmission and reception.

The present invention has been proposed to solve the above problems, by implementing an impedance matching unit in the center of the antenna element having a symmetrical structure, having a bipolar polarization or multi-frequency band operating characteristics, the antenna for transmitting and receiving radio waves and a transformer using the same The purpose is to provide a fender.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The present invention for achieving the above object, a substrate; An antenna element printed on the substrate in symmetrical form to transmit and receive radio waves; And an impedance matching unit integrally installed with the antenna element and installed inside the letter form to match impedance to maximize transmission efficiency of the radio wave.

In addition, another invention of the present invention, the substrate; A series of character antenna elements printed with conductive ink on the substrate comprising symmetric character forms; An impedance matching unit integrally installed with the antenna element and installed inside the character to match impedance to maximize transmission efficiency of the radio wave; And a data processor for performing data processing on the transmission / reception signal of the antenna element, wherein the antenna element is configured of left and right open letters and up and down open letters to provide bipolar polarization.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The symmetrical characters include numbers, mathematical symbols, figures, and the like of a symmetrical structure.

1 is a view showing an embodiment of implementing the antenna for transmitting and receiving radio waves using the letter "C" according to the present invention.

As shown in FIG. 1, the antenna for transmitting and receiving radio waves according to the present invention includes a substrate 10, an antenna element 20, a chip 30, and an impedance matching unit 40.

Unlike conventional character type antennas for transmitting and receiving radio waves, the antenna for transmitting and receiving radio waves according to the present invention has a structure in which one character operates independently at a desired frequency, and at the same time, impedance matching is performed.

The substrate 10 may use a printed paper made of a non-conductor such as wood, Teflon, plastic, and the like.

The antenna element 20 mediates RF (Radio Frequency) signal power between the interrogator and the chip 30, and a conductive ink made of metal paint such as gold, silver, copper, and bronze on the substrate 10. It is preferable to produce by printing. The size is designed so that resonance occurs at the frequency of use, so that the electromagnetic field is well radiated to space.

The chip 30 senses RF (Radio Frequency) signal power from the antenna element 20 to perform data processing, and includes a modulation, detection circuit, rectification circuit, and a microprocessor. In this case, the chip 30 may be formed without a microprocessor.

The rectifier circuit existing in the chip 30 is composed of a device such as a CMOS and a diode, and the devices generate a capacitance component. Thus, the chip 30 typically has an input impedance with a negative reactance value.

Therefore, the antenna element 20 requires an impedance matching circuit having an inductance component having a positive reactance value for impedance matching with the chip 30.

However, in the case of the impedance matching circuit which maintains the inductance component, it is difficult to form the desired value in a small space due to the characteristic that the amount of inductance itself is proportional to the size of the device, and thus it is difficult to form an internal circuit of the chip 30. There is a problem that is difficult to install.

In order to solve this problem, as shown in FIG. 1, the impedance matching unit 40 is implemented in the antenna element 20 integrally with the antenna element 20.

In order to match the impedance of the antenna element 20 and the chip 30, the absolute magnitude of the input impedance of the antenna element 20 including the impedance matching unit 40 is equal to the input impedance of the chip 30. The imaginary part of the input impedance of the antenna element 20 is the same as the absolute magnitude, and the imaginary part of the input impedance of the chip 30 is the same as the absolute magnitude but is designed to maintain the opposite sign.

2 and 3 to be described later, the use frequency is 930MHz, the input impedance of the chip 30 is 20-j50, the result is designed to maintain the above conditions.

In addition, in order to simplify the structure, the letter "C" type antenna element uses a cylindrical cross section with an empty internal space, the outer diameter is 3 cm, the inner diameter is 2.4 cm, the height is 6 cm, the width is 6 cm, and the total length of the antenna is about Maintain 15cm. In addition, the impedance matching unit 40 is implemented by removing the conductive ink into a slot having about 2 cm.

FIG. 2 is a diagram illustrating S11 parameter characteristics of an antenna for transmitting and receiving radio waves of FIG. 1.

2 shows the S11 parameter characteristics when the antenna element 20 is viewed from the place where the chip 30 is installed.

The S parameter represents the ratio of input voltage to output voltage on the frequency distribution. For example, S21 means the ratio of the voltage input at port 1 to the voltage output at port 2. For antennas, S11 is used because there are generally only input ports except for multi-ports.

In FIG. 2, the value of S11 on the vertical axis is represented by a dB scale, and 0 dB in the dB scale means an input reference power.

As shown in FIG. 2, it can be seen that the resonance frequency of the antenna element 20 coincides at the use frequency of 930 MHz.

The input impedance of the antenna element 20 is maintained at 20 + j50 ohms in order to transfer the power dissipated from the antenna element 20 to the chip 30 without loss, that is, to match the impedance of the antenna element 20 and the chip 30. Impedance matching section 40 should be designed as much as possible.

3 is a Smith chart illustrating an input impedance of an antenna element by the impedance matching unit of FIG. 1.

As shown in FIG. 3, the input impedance of the antenna element 20 is 18 + j21 ohms at a use frequency of 930 MHz, and an antenna element for transmitting power dissipated from the antenna element 20 to the chip 30 without loss. 20) is included in the input impedance condition range.

On the other hand, the radiation polarization direction of the radio frequency identification transmission and reception antenna implemented by utilizing the letter "C" according to the present invention shown in Figure 1, as shown in Figure 1 "C" is easily identified with the naked eye on the ground. It shows vertical polarization when it has a possible position and orientation. In addition, the antenna gain is 1.8 ㏈i, and exhibits the characteristic of maintaining omni-directional in two dimensions.

4 is a view showing an embodiment of implementing an antenna for transmitting and receiving radio waves using the letter "H" according to the present invention.

As shown in Figure 4, the radio wave identification transmission and reception antenna implemented using the letter "H" according to the present invention is a substrate 50, antenna element 60, chip 70, impedance matching unit 80 Include.

The substrate 50, the antenna element 60, the chip 70, and the impedance matching unit 80 may include the substrate 10, the antenna element 20, the chip 30, and the impedance matching unit 40 of FIG. 1. Detailed description is omitted since the same design and perform the same function.

FIG. 5 is a diagram illustrating S11 parameter characteristics of the antenna for transmitting and receiving radio waves of FIG. 4, and FIG. 6 is a Smith chart showing input impedance of an antenna element by the impedance matching unit of FIG. 4.

Antenna element 60 "H" is designed to be 6 cm high, 6 cm wide, and 0.6 cm thick, the same as the letter "C" designed in Figs. In addition, the input impedance of the chip 70 uses 20-j50 ohms.

As shown in FIG. 5, it can be seen that the resonance frequencies of the antenna elements 60 coincide at the use frequency of 930 MHz.

In addition, as shown in FIG. 6, the input impedance of the antenna element 60 is 19 + j50 ohms at a use frequency of 930 MHz, so that the antenna element for transmitting power dissipated from the antenna element 60 to the chip 70 without loss. The input impedance condition range of 20 is included.

As shown in FIG. 4, the radiation polarization direction of the radio frequency identification transmission / reception antenna implemented using the alphabet “H” according to the present invention is a position where the “H” can be easily identified from the ground with the naked eye. And a horizontal polarization as opposed to the "C" shaped antenna of FIG. 1 when having an orientation. In addition, the antenna gain represents 2.1GHz.

7, 8, and 9 are diagrams illustrating one embodiment of implementing an antenna for transmitting and receiving radio waves using alphabets "N", "S", and "Z" according to the present invention, respectively.

Antennas for transmitting and receiving radio waves using the letters "N", "S", and "Z" are the same as the antennas for transmitting and receiving radio waves using the letters "C" and "H" of FIGS. 1 and 4. Implement with design conditions.

At this time, the antenna for transmitting and receiving radio waves using the letter "N" is horizontally polarized, the antenna for transmitting and receiving radio waves using the letter "S" is vertically polarized, and the antenna for transmitting and receiving antennas using the letter "Z" is vertically polarized. Indicates.

FIG. 10 is a diagram for one embodiment of an antenna for transmitting and receiving radio waves using Roman numeral " 1 " according to the present invention. In addition, mathematical symbols ((as the union symbol, 인 as the intersection symbol, ⊃ · ⊂ as the inclusion relationship of the set, Σ as the sum, Σ as the integral, ∫, the parentheses (, [...] Etc.) antenna production is possible.

Through the antenna polarization direction from FIG. 1 to FIG. 10, it can be seen that the polarization direction is determined by the form of letters or numbers.

First, in the case of a letter (or a letter, a symbol, a logo) having a structure that is open in left and right directions such as "C", "I", "⊃", and "Σ" and has a vertically symmetrical structure, the polarization direction is vertically polarized. Indicates.

In addition, in the case of letters (or numbers, symbols, and logos) having a structure that is open in the vertical direction such as "H", "M", "∪", and "∩" and has a symmetrical structure, the polarization direction is horizontally polarized. Indicates.

For letters (or numbers, symbols, logos) that have a symmetrical structure with respect to the origin (the center of the letter), such as "S", "N", and "Z", they are opened in the left and right directions, such as "S" and "Z". If it has a structure, the polarization direction represents a vertical polarization, and if it has a structure which opens up and down like "N", a polarization direction represents a horizontal polarization.

That is, the polarization direction in the character type antenna for transmitting and receiving a symmetrical structure is determined by the open structure.

FIG. 11 is a diagram illustrating an embodiment of a transponder using an antenna for transmitting and receiving a radio frequency identification according to the present invention.

As shown, in the present embodiment, a transponder is implemented by using the English company "SHARP" of Saf Corporation.

The transponder includes a radio frequency identification transmission and reception antenna for transmitting and receiving an RF signal to and from an interrogator, a memory unit for storing unique information, and a radio frequency (RF) signal received from the radio frequency identification transmission and reception antenna. Therefore, a radio wave processing unit for transmitting the unique information stored in the memory unit to the radio wave identification transmission and reception antenna.

As shown in FIG. 11, the letters "S" and "H" of the letters "SHARP" of the transponder are installed as antennas for transmitting and receiving radio waves using "S" and "H" according to the present invention.

As described above, the antenna for transmitting and receiving the S-character radio frequency identification has a structure that is open in the left and right direction, and exhibits a vertical polarization characteristic. Polarization characteristics.

Accordingly, the vertically polarized signal transmitted from the transponder reader is received by the "S" antenna, and the horizontally polarized signal transmitted from the transponder reader is received by the "H" antenna, respectively, to implement polarization diversity technology.

12 is a view showing another embodiment of implementing a transponder using an antenna for transmitting and receiving a radio frequency identification operating in a bipolar polarization according to the present invention.

As shown, in the present embodiment, a transponder is implemented by utilizing the English company "SAMSUNG".

The transponder utilizing “SAMSUNG” can implement polarization diversity technology like the transponder of FIG. 11. Select one of "S" at the front or "S" at the center to make an antenna for transmitting and receiving vertical identification, and can transmit and receive vertically polarized signal. Select one of "M", "U", and "N". It is possible to transmit and receive the horizontally polarized signal produced by the radio frequency identification antenna.

In this case, as shown in FIG. 12, polarization diversity technology is implemented by selecting “S” and “N” at the front to produce an antenna for radio wave identification transmission and reception.

FIG. 13 is a diagram illustrating an embodiment of a transponder using an antenna for transmitting and receiving a radio frequency identification operating in a triple frequency band according to the present invention.

Each country can be divided into 433MHz band, 900MHz band, 2.4GHz band, 2.8GHz band. In order to implement such a band to operate in a single transponder, it is necessary to install an antenna for dual, triple, and quad-band radio frequency identification.

As shown in FIG. 13, an antenna for radio wave identification transmission and reception is manufactured at "H", "c", and "i" in Hitachi's English letter "Hitachi". The uppercase "H" is designed to operate in the low frequency band (900MHz), the lowercase "c" in the middle band (2.45GHz), and the lowercase "i" in the high frequency band (5.8GHz). The letter at the beginning of the word is usually capitalized, making it suitable for low frequency antennas.

In this case, in the case of a character that does not operate as an antenna, it may be produced with a conductive ink, or may be produced with a non-conductive general ink in consideration of economical efficiency.

14 is a view showing an embodiment of implementing a transponder using an antenna for transmitting and receiving radio frequency identification operating in a dual frequency band according to the present invention.

As shown in FIG. 14, an antenna for radio wave identification transmission and reception is manufactured in uppercase "M" and lowercase "s" in English "Microsoft" of Microsoft Corporation. The uppercase "M" is designed to operate in the low frequency band (900MHz) and the lowercase "s" in the middle band (2.4GHz).

If fabricated with a transponder operating in the triple frequency band, it is possible to design an antenna for radio wave identification transmission and reception at "i" to operate in the high frequency band (5.8GHz).

FIG. 15 is a diagram illustrating an embodiment of a transponder using an antenna for transmitting and receiving radio waves for simultaneously providing dual frequency band and dipole polarization according to the present invention.

As shown in FIG. 15, an antenna for radio wave identification transmission and reception is manufactured in uppercase "M", lowercase "c", and lowercase "s" in English "Microsoft" of Microsoft Corporation. The uppercase "M" is designed to operate in the low frequency band (900MHz), the lowercase "c" and "s" in the middle band (2.4kHz). In this case, the lowercase letters "c" and "s" transmit and receive horizontally and vertically polarized signals, respectively.

Thus, the transponder shown in FIG. 15 can operate in a dual frequency band and can simultaneously transmit and receive horizontally and vertically polarized signals.

In addition, various combinations provide multi-frequency band characteristics and bipolar polarization characteristics.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those of ordinary skill in Esau.

The present invention as described above, by varying the size of the impedance matching portion of the series of letter-type radio frequency identification and reception antennas including the symmetrical character form, the conventional transponder having a built-in letter-type radio frequency transmission and reception antenna was not provided Has multi-frequency operating characteristics.

In addition, the present invention has a bipolar polarization characteristic because the series of letter-shaped radio frequency identification transmission and reception antennas include left and right open antenna elements in the form of symmetrical letters and top and bottom open antenna elements in the form of symmetrical letters.

.

Claims (7)

  1. Board;
    An antenna element printed on the substrate in symmetrical form to transmit and receive radio waves; And
    Impedance matching unit which is installed inside the letter form integrally with the antenna element to match the impedance to maximize the transmission efficiency of the radio wave
    Antenna for transmitting and receiving radio waves comprising a.
  2. The method of claim 1,
    The substrate,
    Wood, tefphone, plastic,
    The antenna element,
    A radio frequency identification transmission and reception antenna, characterized in that the conductive ink.
  3. The method of claim 2,
    The impedance matching unit,
    And the impedance is adjusted by peeling the conductive ink to a predetermined size.
  4. The method according to any one of claims 1 to 3,
    The symmetric character is a radio frequency identification antenna, characterized in that it comprises a number or a mathematical symbol.
  5. Board;
    A series of character antenna elements printed with conductive ink on the substrate comprising symmetric character forms;
    An impedance matching unit integrally installed with the antenna element and installed inside the character to match impedance to maximize transmission efficiency of the radio wave; And
    Data processing unit for performing data processing on the transmission and reception signal of the antenna element
    Including,
    The antenna element,
    It consists of left and right open letters and top and bottom open letters to provide bipolar polarization.
    Transponder.
  6. The method of claim 5,
    The impedance matching unit,
    A transponder characterized by adjusting the impedance by peeling the conductive ink to a predetermined size.
  7. The method according to claim 5 or 6,
    The impedance matching unit,
    Transponders characterized in that they operate in a plurality of frequency bands of different sizes.
KR1020040049285A 2004-06-29 2004-06-29 Antenna for RFID transponder and transponder using the antenna KR100603617B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020040049285A KR100603617B1 (en) 2004-06-29 2004-06-29 Antenna for RFID transponder and transponder using the antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040049285A KR100603617B1 (en) 2004-06-29 2004-06-29 Antenna for RFID transponder and transponder using the antenna

Publications (2)

Publication Number Publication Date
KR20060000425A true KR20060000425A (en) 2006-01-06
KR100603617B1 KR100603617B1 (en) 2006-07-24

Family

ID=37103726

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020040049285A KR100603617B1 (en) 2004-06-29 2004-06-29 Antenna for RFID transponder and transponder using the antenna

Country Status (1)

Country Link
KR (1) KR100603617B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100817395B1 (en) * 2006-01-31 2008-03-31 후지쯔 가부시끼가이샤 Folded dipole antenna and tag using the same
KR100824871B1 (en) * 2006-02-24 2008-04-23 후지쯔 가부시끼가이샤 Rfid tag

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200477069Y1 (en) * 2013-07-24 2015-05-04 (주)싱텍 IC card having IC chip designed by laser

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9019645D0 (en) 1990-09-07 1990-10-24 Marconi Electronic Devices Moving vehicle transponder
JPH0697714A (en) * 1991-09-30 1994-04-08 Mazda Motor Corp Deciding method for characteristic of dual loop antenna
US5914692A (en) * 1997-01-14 1999-06-22 Checkpoint Systems, Inc. Multiple loop antenna with crossover element having a pair of spaced, parallel conductors for electrically connecting the multiple loops
DE60021454T2 (en) 1999-02-09 2006-05-24 Magnus Granhed Encapsulated antenna in passive transponder
KR20040042754A (en) * 2002-11-15 2004-05-20 최임근 Bad smell removing apparatus of chamber pot

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100817395B1 (en) * 2006-01-31 2008-03-31 후지쯔 가부시끼가이샤 Folded dipole antenna and tag using the same
KR100824871B1 (en) * 2006-02-24 2008-04-23 후지쯔 가부시끼가이샤 Rfid tag

Also Published As

Publication number Publication date
KR100603617B1 (en) 2006-07-24

Similar Documents

Publication Publication Date Title
Islam et al. A novel compact printable dual-polarized chipless RFID system
Hirvonen et al. Planar inverted-F antenna for radio frequency identification
US6839035B1 (en) Magnetically coupled antenna range extender
US7952464B2 (en) Configurable RFID tag with protocol and band selection
US7843347B2 (en) Near-field and far-field antenna-assembly and devices having same
US9767331B2 (en) Methods and apparatus for preserving privacy in an RFID system
US7570225B2 (en) Antenna and non-contact tag
CN1839515B (en) Information processing device having non-contact reader and/or writer and coil antenna for magnetic connection
EP1720216B1 (en) Radio tag
JP5057786B2 (en) Tag
Preradovic et al. Multiresonator-based chipless RFID: barcode of the future
US7714794B2 (en) RFID antenna
US7696884B2 (en) Systems and methods for enhancing the magnetic coupling in a wireless communication system
JP4755921B2 (en) RFID tag
EP2183709B1 (en) Antenna systems for passive rfid tags
JP5076519B2 (en) Tag
TWI244236B (en) Security tag with three dimensional antenna array made from flat stock
US7893813B2 (en) Automatic data collection device, method and article
US7323977B2 (en) Tunable RFID tag for global applications
EP2027658B1 (en) Device with no radiofrequency contact comprising several antennas and associated antenna selection circuit
JP4293468B2 (en) Broadband antenna
Preradovic et al. Design of fully printable planar chipless RFID transponder with 35-bit data capacity
US6281794B1 (en) Radio frequency transponder with improved read distance
Ren et al. A robust UHF near-field RFID reader antenna
EP1703447B1 (en) RFID tag

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20120710

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20130624

Year of fee payment: 8

LAPS Lapse due to unpaid annual fee