JP4989662B2 - RF tag read / write device - Google Patents

Description

  The present invention relates to an RF tag read / write device that reads and writes data from and to an RF tag via radio waves radiated and captured by a dielectric antenna.

  As a configuration in which a dielectric antenna is mounted on a substrate, for example, there are those shown in Patent Documents 1 and 2.

JP 2001-60823 A JP 2005-184615 A

  By the way, data communication using an RF tag is characterized in that a long communication distance can be secured. However, in a small RF tag read / write device or a handy type RF tag read / write device, due to structural limitations, the antenna It is difficult to ensure the size appropriately, the gain cannot be increased, and the desired communication distance cannot be ensured at present.

  In addition, there are linearly polarized waves and rotationally polarized waves as antenna systems, but linearly polarized waves may or may not be established depending on the positional relationship between the antenna and the RF tag. It is unsuitable for a mode in which the relative position with the RF tag such as a tag read / write device varies, and rotational polarization is desired. However, rotationally polarized waves require an electric current to flow on the surface of the antenna, and the size of the antenna needs to be increased. For this reason, when the antenna size is small, the gain cannot be increased and a desired communication distance cannot be secured.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to read and write an RF tag that can appropriately secure a desired communication distance even when the size of the antenna is limited. To provide an apparatus.

  According to the first aspect of the present invention, the conductor portion of the dielectric antenna is located on the side opposite to the radiation direction in which the radio wave is radiated, on the back side of the dielectric antenna in which the conductor portion is mounted on the dielectric. The conductor member is formed in such a manner that the dimension in the longitudinal direction corresponds to a half of the wavelength of the radio wave radiated and captured by the conductor portion of the dielectric antenna. It can function as a reflector that reflects the radio waves radiated from the antenna. By combining the radio waves directly radiated from the dielectric antenna and the radio waves radiated from the dielectric antenna and reflected by the conductor member, the gain is increased. Can be increased. Thereby, even if there is a restriction on the size of the dielectric antenna, a desired communication distance can be appropriately ensured.

According to the first aspect of the present invention, the dielectric antenna and the RF tag control means are mounted on the flat multilayer board, and the conductor member is a conductor that forms one of the many layers of the multilayer board. Since it is composed of layers, a conductor member that functions as a reflector for reflecting radio waves radiated from a dielectric antenna can be realized by using a conductor layer that is one of many layers in a multilayer substrate.

According to the second aspect of the present invention, since the conductor layer is composed of the ground layer or the power source layer, the conductor member that functions as a reflector for reflecting the radio wave radiated from the dielectric antenna is formed of a plurality of layers in the multilayer substrate. It can be realized by using a ground layer or a power supply layer forming one of the layers.

According to the invention described in claim 3 , since the conductor member is formed of a linear member having a linear shape, even if the dielectric antenna is not mounted on the substrate, the conductor member is linear on the back side of the dielectric antenna. By providing the member, the linear member can function as a reflecting plate that reflects the radio wave radiated from the dielectric antenna, and the linear member radiated from the dielectric antenna and the radio wave directly radiated from the dielectric antenna. The gain can be increased by synthesizing with the radio wave reflected by.

According to the invention described in claim 4 , the wing conductor member configured to have a size corresponding to a half of the wavelength of the radio wave radiated and captured by the conductor portion of the dielectric antenna is provided. Since the conductor member and the wing conductor member are arranged so that the longitudinal direction and the longitudinal direction of the wing conductor member are orthogonal to each other, in addition to the conductor member functioning as a reflector that reflects radio waves radiated from the dielectric antenna The wing conductor member can also function as a reflecting plate that reflects radio waves radiated from the dielectric antenna, and a desired communication distance can be ensured more appropriately. In addition, since the wing conductor member has a size corresponding to half the wavelength of the radio wave radiated and captured by the dielectric antenna, the RF tag read / write can be performed by setting the axial ratio to “1 (0 dB)”. Data can be appropriately read from and written to the RF tag regardless of the orientation of the apparatus.

According to the invention described in claim 5 , the wing conductor member is configured to be rotatable between the retracted state and the deployed state, and is configured to extend along the longitudinal direction of the conductor member in the retracted state. Since it is configured to have a dimension equivalent to one half the wavelength of the radio wave radiated and captured by the conductor portion of the dielectric antenna in the direction perpendicular to the longitudinal direction, data is read from and written to the RF tag. If not, the wing conductor member may be rotated to the retracted state, and the wing conductor member may be rotated to the unfolded state only when data is read from or written to the RF tag.

BRIEF DESCRIPTION OF THE DRAWINGS The 1st Embodiment of this invention is shown, The top view and vertical side view of RF tag reading / writing apparatus Plan view and vertical side view of a multilayer substrate on which a dielectric antenna is mounted Functional block diagram Diagram showing measurement conditions and measurement results 4 equivalent diagram 4 equivalent diagram The 2nd Embodiment of this invention is shown, The top view and vertical side view of RF tag reading / writing apparatus 4 equivalent diagram The figure which shows the 3rd Embodiment of this invention, and shows a measurement condition and a measurement result 4 equivalent diagram Fig. 4 (a) equivalent Fig. 4 (b) equivalent 4 equivalent diagram 4 equivalent diagram

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1A shows a plan view of the RF tag read / write device, and FIG. 1B shows a vertical side view of the RF tag read / write device. An RF tag read / write device (reader / writer) 1 is a handy type that can be gripped by a user, and a housing 2 of the RF tag read / write device (reader / writer) 1 is configured by combining a wide head 2a and a grip 2b that the user grips. . The head portion 2a is provided with a display portion 3 made of, for example, a liquid crystal display, and the grip portion 2b is provided with a key operation portion 4 in which a plurality of keys are arranged. A multilayer substrate 5 as a main substrate is provided inside the housing 2, and a dielectric antenna 6 and an RF tag control unit 7 (RF tag control means in the present invention) are provided on one surface of the multilayer substrate 5. ) And have been implemented.

  2A is a plan view of the multilayer substrate 5 on which the dielectric antenna 6 is mounted, and FIG. 2B is a vertical side view of the multilayer substrate 5 on which the dielectric antenna 6 is mounted. ing. As shown in FIG. 2, the multilayer substrate 5 is configured such that electronic parts can be mounted on both surface portions thereof, and a ground layer 8 (a conductor member, a conductor layer as referred to in the present invention) and a power source are provided inside the multilayer substrate 5. Layer 9 is laminated. The dielectric antenna 6 described above is configured such that a conductor portion 11 made of a metal plate is mounted on a rectangular dielectric 10. The multilayer substrate 5 is configured such that its longitudinal dimension (indicated by “L1” in FIG. 2) is longer than the dimension corresponding to half the wavelength of the radio wave radiated and captured by the dielectric antenna 6. The ground layer 8 laminated inside the multilayer substrate 5 has a longitudinal dimension (indicated by “L2” in FIG. 2) of the wavelength of the radio wave radiated and captured by the dielectric antenna 6. The size is equivalent to one-half the size. The ground layer 8 is divided into an upper half portion 8 a and a lower half portion 8 b with a narrow portion as a boundary, and the dielectric antenna 6 is mounted on the upper half portion 8 a of the ground layer 8. The dielectric antenna 6 is located away from the longitudinal end of the ground layer 8 by a dimension corresponding to a quarter of the wavelength of the radio wave radiated and captured by the dielectric antenna 6, that is, the ground layer 8. It is mounted at the center in the longitudinal direction. In addition, a battery 12 that supplies operating power of the RF tag read / write device 1 to each unit is mounted inside the housing 2.

  FIG. 3 is a functional block diagram showing the electrical configuration of the RF tag read / write device 1 described above. The processing unit 13 includes a CPU 14, a memory 15, and an input / output unit 16, and is configured by connecting the display unit 3, the key operation unit 4, and the RF tag control unit 7 described above. The CPU 14 outputs a data communication command to the RF tag control unit 7 so as to modulate transmission data and radiate a radio wave of a predetermined frequency from the dielectric antenna 6 and a predetermined frequency captured by the dielectric antenna 6. The RF tag control unit 7 performs reception processing for demodulating radio waves and extracting received data. Further, the CPU 14 outputs various display information on the display unit 3 by outputting a display command to the display unit 3, and an operation input from the key operation unit 4 in response to the user operating the key operation unit 4. Accept and process the signal. Various electronic components constituting the processing unit 13 are mounted on the surface of the multilayer substrate 5. The predetermined frequency of the radio wave radiated and captured by the dielectric antenna 6 is, for example, 952 to 954 [MHz].

In the configuration described above, the dimension in the longitudinal direction of the ground layer 8 is a dimension corresponding to half the wavelength of the radio wave radiated and captured by the dielectric antenna 6, and the dielectric antenna 6 is mounted on the ground layer 8. Although the structure mounted in the center part of the longitudinal direction is employ | adopted, this is based on the following reasons. That is, the inventor considered the above-described ground layer 8 as a metal plate, and measured the following (1) to (3) regarding the relationship between the dielectric antenna and the metal plate. Here, the central portion in the longitudinal direction of the ground layer 8 indicates a range having a certain width.
(1) Change in the maximum gain of V polarization when the length (dimension in the longitudinal direction) of the metal plate is changed (2) V deviation when the distance from the back surface of the dielectric antenna to the metal plate is changed Change in maximum wave gain (3) Change in maximum gain of V polarization when the distance from the center of the metal plate to the center position of the dielectric antenna is changed

  FIG. 4 shows the measurement conditions (a) and measurement results (b) in (1) described above. The width of the metal plate is “40 mm”, and the distance from the back surface of the dielectric antenna to the metal plate is “5 mm”. When the center position of the dielectric antenna is “25 mm” from the end of the metal plate, the change in the maximum gain of the V polarization when the length of the metal plate is changed from “40 to 200 mm” is shown. . As is apparent from this measurement result, it is understood that the maximum gain of the V polarization is the best when the length of the metal plate is “about 145 mm”. The length of the metal plate “about 145 mm” is a value close to one half of the wavelength of the radio wave of 952 to 954 [MHz], which is a predetermined frequency radiated and captured by the dielectric antenna 6. This is because the length of the metal plate in the longitudinal direction is equivalent to one half of the wavelength of the radio wave radiated and captured by the dielectric antenna 6, so that the radio wave radiated from the dielectric antenna can be obtained. This is because the gain is increased by combining the radio wave directly radiated from the dielectric antenna and the radio wave radiated from the dielectric antenna and reflected by the metal plate.

  FIG. 5 shows the measurement conditions (a) and measurement results (b) in (2) described above. The width of the metal plate is “40 mm”, the length of the metal plate is “140 mm”, and the center of the dielectric antenna is shown. When the position is “25 mm” from the end of the metal plate, the change in the maximum gain of the V polarization when the distance from the back surface of the dielectric antenna to the metal plate is changed by “5 to 40 mm” is shown. . As is apparent from the measurement results, the maximum gain of the V polarization is best when the distance from the back surface of the dielectric antenna to the metal plate is “about 10 to 20 mm”.

  FIG. 6 shows measurement conditions (a) and measurement results (b) in (3) described above, where the width of the metal plate is “40 mm”, the length of the metal plate is “140 mm”, and the back surface of the dielectric antenna. Change in the maximum gain of V polarization when the distance from the center of the metal plate to the center position of the dielectric antenna is changed by “−50 to 0 mm” when the distance from the metal plate to the metal plate is “5 mm” Is shown. As is apparent from this measurement result, when the distance from the center of the metal plate to the center position of the dielectric antenna is “0 mm” (as the dielectric antenna is closer to the center of the metal plate), It can be seen that the maximum gain is the best.

  Based on the measurement results shown above, in this embodiment, in order to eliminate the size restriction of the dielectric antenna 6 in the handheld RF tag read / write device 1, the longitudinal dimension of the ground layer 8 is changed to the dielectric antenna. 6 has a size corresponding to one half the wavelength of the radio wave radiated and captured by the dielectric layer 6, and the dielectric antenna 6 is mounted at the center in the longitudinal direction of the ground layer 8.

  As described above, according to the first embodiment, in the RF tag read / write device 1, the longitudinal dimension of the ground layer 8 of the multilayer substrate 5 is set to 2 of the wavelength of the radio wave radiated and captured by the dielectric antenna 6. Since the dimensions corresponded to 1 / fold, the ground layer 8 of the multilayer substrate 5 can function as a reflector that reflects radio waves radiated from the dielectric antenna 6, and is directly radiated from the dielectric antenna 6. The gain can be increased by combining the radio wave and the radio wave radiated from the dielectric antenna 6 and reflected by the ground layer 8 of the multilayer substrate 5, even if the size of the dielectric antenna 6 is limited. The desired communication distance can be appropriately ensured.

  Further, since the dielectric antenna 6 is arranged at the center in the longitudinal direction of the ground layer 8, the gain can be increased more reliably. In addition, since the ground layer 8 of the multilayer substrate 5 is configured to function as a reflecting plate that reflects radio waves radiated from the dielectric antenna 6, it is not necessary to separately provide a layer that functions as a reflecting plate. Can be realized.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, description is abbreviate | omitted about the same part as above-mentioned 1st Embodiment, and a different part is demonstrated. In the second embodiment, a wing antenna unit is added to the first embodiment described above.

  7A and 7B are plan views of the RF tag read / write device, and FIG. 7C is a vertical side view of the RF tag read / write device. That is, the housing 22 of the RF tag read / write device 21 has a head 22a and a grip 22b having the same width, the head 22a is provided with a display 23, and the grip 22b is described above. The key operation unit 4 described in the first embodiment is provided. A multilayer substrate 24 as a main substrate is provided inside the housing 22, and the dielectric antenna 6 and the RF tag control unit described in the first embodiment are provided on one surface portion of the multilayer substrate 24. 7 is implemented.

  The multilayer substrate 24 is configured such that electronic parts can be mounted on both surface portions thereof, and a ground layer 25 and a power supply layer are laminated inside thereof. The ground layer 25 is radiated and captured by the dielectric antenna 6 in the longitudinal direction (indicated by “L3” in FIG. 7) in the same manner as the ground layer 8 described in the first embodiment. The size corresponds to one half of the wavelength of the radio wave, and the upper half portion 25a and the lower half portion 25b are separated by a narrow portion. The dielectric antenna 6 is located at a position away from the longitudinal end of the ground layer 25 by a dimension corresponding to a quarter of the wavelength of the radio wave radiated and captured by the dielectric antenna 6, that is, the ground layer 25. It is mounted at the center in the longitudinal direction.

  In the second embodiment, the ground layer 25 is provided with a wing antenna portion 26 (a wing conductor member referred to in the present invention) in a symmetrical manner in a bilaterally symmetrical manner. The wing antenna unit 26 is stored in a state of being stored along the longitudinal direction of the housing 22 (state shown in (a)), and in a deployed state in which the tip side protrudes from the housing 22 (state shown in (b)). ) In the unfolded state (indicated by “L4” in FIG. 7) is half the wavelength of the radio wave radiated and captured by the dielectric antenna 6. The dimensions are equivalent. This is based on the following reasons. That is, the inventor measured the axial ratio of the shape of the wing antenna part.

  FIG. 8 shows measurement conditions (a), (b) and measurement results (c). The width of the metal plate is “40 mm”, the length of the metal plate is “140 mm”, and the metal from the back of the dielectric antenna is shown. When the distance to the plate is “5 mm”, the change in the axial ratio is shown when the shape of the wing antenna part (the horizontal dimension and the vertical dimension) is changed. As is apparent from this measurement result, it is understood that the axial ratio is the best (the axial ratio is close to “1 (0 dB)”) when the lateral dimension of the wing antenna portion is “about 120 mm”. The horizontal dimension “about 120 mm” of the wing antenna portion is a value close to one-half the wavelength of a radio wave of, for example, 952 to 954 [MHz], which is a predetermined frequency radiated and captured by the dielectric antenna.

  In this case, if the axial ratio deviates significantly from “1”, the RF tag read / write device 21 has a direction in which data can be read / written and a direction in which data cannot be read / written, so the axial ratio becomes “1”. The closer one is desirable. In the present embodiment, the lateral dimension of the wing antenna unit 26 is set to a value close to one half of the wavelength of the radio wave of 952 to 954 [MHz], which is a predetermined frequency that the dielectric antenna 6 radiates and captures. Thus, the axial ratio is set to a value close to “1”. As a result, the user can read and write data without being aware of the direction of the RF tag read / write device 21, and the usability can be improved.

  As described above, according to the second embodiment, in the RF tag read / write device 21, the longitudinal dimension of the ground layer 25 of the multilayer substrate 24 is set to 2 of the wavelength of the radio wave radiated and captured by the dielectric antenna 6. Since the dimension is equivalent to 1 / fold, the ground plate 25 of the multilayer substrate 24 reflects the radio wave radiated from the dielectric antenna 6 in the same manner as described in the first embodiment. The gain can be increased by combining the radio wave directly radiated from the dielectric antenna 6 and the radio wave radiated from the dielectric antenna 6 and reflected by the ground layer 25 of the multilayer substrate 24. Even when the size of the dielectric antenna 6 is limited, a desired communication distance can be appropriately ensured.

  In this case, since the wing antenna unit 26 is provided, the ground layer 25 of the multilayer substrate 24 also functions as a reflector for reflecting the radio wave radiated from the dielectric antenna 6, and in addition, the wing antenna unit 26 Can also function as a reflector that reflects the radio waves radiated from the dielectric antenna 6, and a desired communication distance can be ensured more appropriately. In addition, since the dimension of the wing antenna portion 26 is configured to correspond to a half of the wavelength of the radio wave radiated / captured by the dielectric antenna 6, the axial ratio can be substantially “1”. Regardless of the orientation of the RF tag read / write device 1, data can be appropriately read from and written to the RF tag, and usability can be improved.

  Further, since the wing antenna unit 26 is configured to be rotatable between the retracted state and the deployed state, the wing antenna unit 26 is rotated to the retracted state when data is not read from or written to the RF tag. Thus, it is only necessary to rotate the wing antenna portion 26 to the unfolded state only when reading and writing data, and the usability can be improved.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, description is abbreviate | omitted about the same part as above-mentioned 1st Embodiment, and a different part is demonstrated. In the third embodiment, the dielectric antenna is not mounted on the multilayer substrate, and a linear member having a linear shape is provided on the back surface of the dielectric antenna, so that the linear member is substituted for the ground layer of the multilayer substrate. Is configured to function as a reflector.

That is, the inventor considered the above-described linear member as a metal wire, and measured the relationship between the dielectric antenna and the metal wire.
FIG. 9 shows measurement conditions (a) and measurement results (b) for a configuration in which a metal wire is disposed on the back surface of the dielectric antenna. The distance from the back surface of the dielectric antenna to the metal wire is “5 mm”. When the center position of the dielectric antenna is “70 mm” from the end of the metal wire, the change in gain when the length of the metal wire is changed is shown. As is apparent from this measurement result, when the length of the metal wire drawn upward from the dielectric antenna (added to “90 mm”) is “about 80 mm”, that is, the total length of the metal wire is “ When it is about 170 mm ", it can be seen that the gain equivalent to the configuration in which the metal plate is disposed on the back surface of the dielectric antenna is obtained, and the metal wire functions as a reflecting member in the same manner as the metal plate described above. You can see that

  FIG. 10 shows measurement conditions (a) and measurement results (b) for a configuration in which a metal wire is arranged offset from the center position of the dielectric antenna on the back surface of the dielectric antenna. When the distance from the metal wire is “5 mm”, the center position of the dielectric antenna is “70 mm” from the end of the metal wire, and the total length of the metal wire is “170 mm”, the offset length is changed The change in gain is shown. As is clear from this measurement result, even when the metal wire is arranged slightly off the center line instead of the center position of the dielectric antenna, it is the same as when the metal wire is arranged at the center position of the dielectric antenna. Thus, it can be seen that the metal wire functions as a reflecting member in the same manner as the metal plate described above.

11 and 12 show measurement conditions (FIGS. 11A and 11B) and measurement results (FIGS. 12A to 12B) for a configuration in which two metal wires are symmetrically arranged on the back surface of the dielectric antenna. (C)), the distance from the rear surface of the dielectric antenna to the metal wire is “5 mm”, the center position of the dielectric antenna is “70 mm” from the end of the metal wire, and the distance between the two metal wires is When “30 mm” and “40 mm”, the change in the gain when the length of the metal wire is changed is shown. As is apparent from this measurement result, when the length of the metal wire drawn upward from the dielectric antenna is “about 50 to 80 mm”, that is, the total length of the metal wire is “about 140 to 170 mm”. Sometimes it can be seen that the gain equivalent to the configuration in which the metal plate is arranged on the back surface of the dielectric antenna is obtained, and that the metal wire functions as a reflecting member in the same manner as the metal plate described above. . Further, the difference in the distance between the two metal lines does not cause a great difference in the maximum gain, but it can be seen that the decrease in the gain is smaller when the distance between the two metal lines is “30 mm”.

  FIG. 13 shows measurement conditions (a) and measurement results (b) for a configuration in which two metal wires are arranged symmetrically on the back surface of the dielectric antenna, from the back surface of the dielectric antenna to the metal wires. When the distance is “5 mm” and the center position of the dielectric antenna is “70 mm” from the end of the metal wire, the change in gain when the distance between the two metal wires is changed is shown. As is apparent from this measurement result, it can be seen that the gain decreases when the distance between the two metal wires is increased from “40 mm”.

  FIG. 14 shows measurement conditions (a) and measurement results (b) and (c) for a configuration in which two metal wires are symmetrically arranged on the back surface of the dielectric antenna. When the distance to the metal wire is “5 mm” and the center position of the dielectric antenna is “70 mm” from the end of the metal wire, the change in gain when the two metal wires are configured in an L shape is shown. ing. As is apparent from the measurement results, although the gain decreases as the folding position approaches the dielectric antenna, the gain decreases more slowly than the configuration in which it is simply shortened linearly.

  As described above, according to the third embodiment, even when the dielectric antenna 6 is not mounted on the substrate, the linear member is provided on the back side of the dielectric antenna 6 to thereby provide a line. The shaped member can function as a reflector that reflects the radio wave radiated from the dielectric antenna 6, and the radio wave directly radiated from the dielectric antenna 6 and the dielectric antenna 6 are reflected by the linear member. Gain can be increased by combining radio waves.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The RF tag read / write device is not limited to a dedicated device for reading / writing data from / to the RF tag, and may be a portable terminal such as a mobile phone or a portable information terminal incorporating a module for reading / writing data from / to the RF tag. good. In addition, the RF tag read / write device may be fixed and used.

By setting the length of the power supply layer in the longitudinal direction to a size corresponding to half the wavelength of the radio wave radiated and captured by the dielectric antenna, and disposing the dielectric antenna in the center of the power supply layer, Instead of the layer, the power supply layer may function as a reflector.
The second embodiment and the third embodiment may be combined. That is, you may arrange | position two metal wires on the back surface of a dielectric antenna so as to be orthogonal.

  In the drawings, 1 is an RF tag read / write device, 6 is a dielectric antenna, 7 is an RF tag control unit (RF tag control means), 8 is a ground layer (conductor member, conductor layer), 9 is a power supply layer, and 10 is a dielectric. , 11 is a conductor part, 21 is an RF tag read / write device, 24 is a multilayer substrate, 25 is a ground layer (conductor member, conductor layer), and 26 is a wing antenna part (wing conductor member).

Claims (6)

A dielectric antenna in which a conductor is mounted on top of a dielectric;
RF tag control means for reading and writing data to and from the RF tag via radio waves radiated and captured by the conductor portion of the dielectric antenna;
A conductor member provided on the back side of the dielectric antenna so that the conductor portion of the dielectric antenna is located on the opposite side to the radiation direction of radiating radio waves,
The dielectric antenna and the RF tag control means are mounted on a multi-layer substrate having a flat plate shape,
The conductor member is composed of a conductor layer forming one layer among a number of layers in the multilayer substrate,
The RF tag read / write characterized in that the conductor member has a longitudinal dimension corresponding to a half of a wavelength of a radio wave radiated and captured by the conductor portion of the dielectric antenna. apparatus. The RF tag read / write device according to claim 1,
The RF tag read / write device, wherein the conductor layer is composed of a ground layer or a power supply layer. The RF tag read / write device according to claim 1,
The RF tag read / write device, wherein the conductor member is formed of a linear member having a linear shape. The RF tag read / write device according to any one of claims 1 to 3,
A wing conductor member configured to have a size corresponding to a half of the wavelength of a radio wave radiated and captured by the conductor portion of the dielectric antenna;
The RF tag read / write device, wherein the conductor member and the wing conductor member are arranged so that a longitudinal direction of the conductor member and a longitudinal direction of the wing conductor member are orthogonal to each other. The RF tag read / write device according to claim 4,
The wing conductor member is rotatable between a retracted state and an unfolded state, and is configured to extend along the longitudinal direction of the conductor member in the retracted state, and with respect to the longitudinal direction of the conductor member in the unfolded state The RF tag read / write device is configured to have a size corresponding to a half of a wavelength of a radio wave radiated and captured by the conductor portion of the dielectric antenna in a direction perpendicular to the dielectric antenna. The RF tag read / write device according to any one of claims 1 to 5,
The RF tag read / write device, wherein the conductor portion of the dielectric antenna has a characteristic of radiating and capturing a 953 MHz band radio wave.

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