CN106252834B - Antenna and tag reading equipment - Google Patents

Abstract

The invention provides an antenna and a label reading device with the antenna, wherein the antenna of the anti-interference high-frequency RFID label reading device comprises: at least one pair of high frequency antenna loops; each high frequency antenna loop pair comprises: the antenna comprises a first high-frequency antenna loop and a second high-frequency antenna loop which is the same as the first high-frequency antenna loop, wherein the first high-frequency antenna loop and the second high-frequency antenna loop respectively comprise an initial section antenna, a loop section antenna and a termination section antenna, and the termination section antenna of the first high-frequency antenna loop is connected to the initial section antenna of the second high-frequency antenna; and the first high-frequency antenna loop generates a first resonant current when receiving the interference electromagnetic wave, the second high-frequency antenna loop generates a second resonant current when receiving the interference electromagnetic wave, and the current directions of the first resonant current and the second resonant current are opposite. According to the technical scheme, the interference of electromagnetic waves from the space to the antenna of the high-frequency RFID label reading device can be effectively inhibited, and the signal-to-noise ratio of the output signal of the antenna is improved.

Description

Antenna and tag reading equipment

technical field

The present invention relates to the field of wireless radio frequency technology, in particular, to an antenna of an anti-jamming high-frequency RFID tag reading device, a high-frequency RFID tag reading device, an antenna of a dual-frequency RFID tag reading device and A dual-frequency RFID tag reading device.

Background technique

At present, in the application of high-frequency RFID (Radio Frequency Identification, radio frequency identification), various electromagnetic waves from a far space will cause interference to the RFID tag reading device through the antenna, so that the distance to read the tag is greatly reduced. Generally, high-frequency RFID works at a frequency of several megahertz, such as 6.8MHz or 13.56MHz, and its interference mainly includes two aspects: one is the signal of a short-wave broadcasting station; the other is alternating current, when the RFID tag is read Interference can also occur when the antenna of the device is placed close to an AC power supply line. However, the existing high-frequency antenna is composed of a resonant loop, which is either formed by crossing multiple coaxial lines, or composed of a plurality of resonant oscillators connected in series by single-core wires and capacitors. Generally, the resonant ring can only suppress interference through its own bandwidth limitation or directly has no anti-interference ability, and the anti-interference method is relatively simple and the effect is not obvious.

Therefore, how to suppress the interference caused by electromagnetic waves from space to the antenna of the high-frequency RFID tag reading device, so as to improve the signal-to-noise ratio of the antenna output signal has become an urgent technical problem to be solved.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

For this reason, an object of the present invention is to propose the antenna of a kind of new anti-jamming high-frequency RFID tag reading equipment, by the high-frequency antenna loop that is made of two high-frequency antenna loops identical in shape, size to As a basic antenna structure, the electromagnetic waves from a far space generate equal and opposite resonant currents in the two high-frequency antenna loops to cancel out, so as to achieve the purpose of anti-interference, thereby improving the signal-to-noise ratio of the antenna output signal .

Another object of the present invention is to provide a high-frequency RFID tag reading device with the antenna.

Yet another object of the present invention is to provide an antenna for a dual-frequency RFID tag reading device.

Another object of the present invention is to provide a dual-frequency RFID tag reading device with the antenna.

In order to achieve at least one of the above objectives, according to a first aspect of the present invention, an anti-jamming high-frequency RFID tag reading device antenna is proposed, including: at least one high-frequency antenna loop pair; each of the high-frequency antennas The loop pair includes: a first high-frequency antenna loop and a second high-frequency antenna loop identical to the first high-frequency antenna loop, wherein the first high-frequency antenna loop includes a first initial stage antenna , a first loop segment antenna and a first termination segment antenna, the second high frequency antenna loop includes a second start segment antenna, a second loop segment antenna and a second termination segment antenna, and the first termination segment antenna Connected to the second initial section antenna; and the first high-frequency antenna loop generates a first resonant current when receiving an interfering electromagnetic wave, and the second high-frequency antenna loop receives the interfering electromagnetic wave A second resonant current is generated, and current directions of the first resonant current and the second resonant current are opposite.

According to the antenna of the anti-interference high-frequency RFID tag reading device of the present invention, it includes at least one pair of high-frequency antenna loops, and each pair of high-frequency antenna loops includes two identical high-frequency antenna loops, and the first The end segment antenna of the high-frequency antenna loop is connected with the start segment antenna of the second high-frequency antenna loop, that is, the same high-frequency antenna is wound into a basic antenna structure comprising two identical high-frequency antenna loops ( That is, the pair of high-frequency antenna loops), and the first high-frequency antenna loop and the second high-frequency antenna loop respectively generate resonance currents with opposite current directions when receiving uniform interfering electromagnetic waves from a far space, and because the two Otherwise, the resonant currents generated by the same high-frequency antenna loops are equal in size, so that the resonant currents generated by the interference electromagnetic wave in the two high-frequency antenna loops cancel each other out, and because the antenna of the high-frequency RFID tag reading device reads When the high-frequency RFID tag is taken closer to the tag, the tag is not uniform on the two high-frequency antenna loops, and the generated resonance current will not be completely offset, and the signal sent by the tag can be received, that is The purpose of anti-interference is achieved, and the signal-to-noise ratio of the antenna output signal is improved, and at the same time, it can ensure that the antenna of the high-frequency RFID tag reading device can receive the signal sent by the high-frequency RFID tag.

The antenna of the anti-interference high-frequency RFID tag reading device according to the above-mentioned embodiments of the present invention may also have the following technical characteristics:

In the above technical solution, preferably, further comprising: a receiving circuit; and the first start section antenna of the first high-frequency antenna loop and the second end section of the second high-frequency antenna loop An antenna is connected to the receiving circuit.

In this technical solution, the first start section antenna of the first high frequency antenna loop of each high frequency antenna loop pair and the second end section antenna of the second high frequency antenna loop are connected to the receiving circuit to The signal sent by the frequency RFID tag is decoded.

In any of the above technical solutions, preferably, the at least one high-frequency antenna loop pair is a plurality of high-frequency antenna loop pairs.

In this technical solution, in order to realize the reading of the signal sent by the high-frequency RFID tag in a relatively large range, the antenna of the anti-jamming high-frequency RFID tag reading device can be arranged to include multiple pairs of high-frequency antenna loops .

In any of the above technical solutions, preferably, the multiple pairs of high-frequency antenna loops are arranged side by side in sequence.

In this technical solution, when laying out, multiple high-frequency antenna loop pairs can be arranged side by side in sequence, that is, the second high-frequency antenna loop of the previous high-frequency antenna loop pair and the subsequent high-frequency antenna loop pair The first high-frequency antenna loops are arranged adjacently, and so on, so as to read the signal sent by the high-frequency RFID tag in a relatively large range.

In any of the above technical solutions, preferably, there is an interval between the first high-frequency antenna loop and the second high-frequency antenna loop in each of the high-frequency antenna loop pairs, and the A space may accommodate either the first high-frequency antenna loop or the second high-frequency antenna loop.

In this technical solution, further when forming each pair of high-frequency antenna loops, a space between the first high-frequency antenna loop and the second high-frequency antenna loop that can accommodate the first high-frequency antenna loop can be reserved. The interval between the high-frequency antenna loop or the second high-frequency antenna loop is to facilitate the realization of diversified arrangement among multiple pairs of high-frequency antenna loops.

In any of the above technical solutions, preferably, the multiple high-frequency antenna loops are divided into multiple high-frequency antenna loop groups, and each of the high-frequency antenna loop groups includes two high-frequency antennas The loop pair, and the first high-frequency antenna loop in the second high-frequency antenna loop pair in each of the high-frequency antenna loop groups is located in the first high-frequency antenna loop pair in the first high-frequency antenna loop group. In the interval between a high-frequency antenna loop and the second high-frequency antenna loop, and the second high-frequency antenna loop of the first high-frequency antenna loop pair is located at the second height In the interval between the first high-frequency antenna loop and the second high-frequency antenna loop of the pair of high-frequency antenna loops.

In this technical solution, further, when a plurality of high-frequency antenna loops are arranged, they can be grouped to obtain multiple sets of high-frequency antenna loop groups. The first high-frequency antenna loop in the second high-frequency antenna loop pair is arranged in the interval of the first high-frequency antenna loop pair in each group, the second high-frequency antenna loop in the first high-frequency antenna loop pair The antenna loop is arranged in the interval of the second high-frequency antenna loop pair to read the signal sent by the high-frequency RFID tag in a relatively large range, and to ensure a relatively uniform reading distance, avoiding each high-frequency A reading blind area appears in the interval between the first high-frequency antenna loop and the second high-frequency antenna loop of the antenna loop pair, so as to avoid affecting the reading effect of the signal sent by the high-frequency RFID tag.

In the above technical solution, when multiple high-frequency antenna loop pairs are grouped, other grouping methods can also be used, such as dividing every three high-frequency antenna loop pairs into a group, or every two high-frequency antenna loop pairs Yes, every three high-frequency antenna loop pairs are cross-grouped, etc., then the interval between the two high-frequency antenna loops in each high-frequency antenna loop pair can be larger to accommodate more high-frequency antenna loops. Antenna loop.

In any of the above technical solutions, preferably, the shape and size of the first high-frequency antenna loop and the second high-frequency antenna loop are the same, wherein the first high-frequency antenna loop and the The shape of the second high-frequency antenna loop includes rectangle, circle or ellipse.

In this technical scheme, the same first high-frequency antenna loop and the second high-frequency antenna loop in each high-frequency antenna loop pair have the same shape and size, for example, they are all rectangular, circular or elliptical, When both are rectangular, their length and width should be the same, and when they are both circular, their radii should be the same, so as to ensure that the resonant currents generated in the two high-frequency antenna loops can cancel each other out, so as to achieve the purpose of anti-interference Of course, those skilled in the art should understand that, in addition to the above-mentioned shape, the high-frequency antenna loop can also be in other shapes, such as a square, etc., which can achieve the purpose of canceling the generated resonant currents.

In any of the above technical solutions, preferably, further comprising: a closed loop wire located at an outer circle of the at least one high-frequency antenna loop pair.

In this technical scheme, in order to further reduce the interference of other electromagnetic waves from the outside when the antenna of the anti-interference high-frequency RFID tag reading device receives high-frequency electromagnetic waves, a closed loop wire can be arranged around its outer ring to generate a Resistance to electromagnetic fields prevents changes in external alternating electromagnetic fields to further improve the anti-interference ability of the antenna.

According to a second aspect of the present invention, a high-frequency RFID tag reading device is proposed, including the antenna of the anti-jamming high-frequency RFID tag reading device described in any one of the above technical solutions, therefore, the high-frequency RFID The tag reading device has all the beneficial effects of the antenna of the anti-jamming high-frequency RFID tag reading device described in any one of the above technical solutions, which will not be repeated here.

According to a third aspect of the present invention, an antenna for a dual-frequency RFID tag reading device is proposed, including: a low-frequency loop antenna, and the anti-jamming high-frequency RFID tag reading device described in any one of the above technical solutions Antenna; the low-frequency loop antenna is connected to a transmitting circuit for sending low-frequency electromagnetic waves to a dual-frequency RFID tag to activate the dual-frequency RFID tag; the antenna of the anti-jamming high-frequency RFID tag reading device is located at the low-frequency The loop area enclosed by the loop antenna is used to receive the high-frequency electromagnetic waves emitted by the dual-frequency RFID tag.

In this technical solution, by arranging a low-frequency loop antenna on the outer ring of the antenna of the anti-jamming high-frequency RFID tag reading device, the low-frequency electromagnetic waves emitted by the low-frequency loop antenna can be used to activate the dual-frequency RFID tag, and then through the The antenna of the anti-interference high-frequency RFID tag reading device receives the high-frequency electromagnetic waves emitted by the dual-frequency RFID tag, and can achieve the purpose of anti-interference, thereby improving the signal-to-noise ratio of the antenna output signal.

In the above technical solution, preferably, further comprising: a closed loop wire located at the outer ring of the low-frequency loop antenna.

In order to further reduce the interference of other electromagnetic waves from the outside when the antenna of the entire dual-frequency RFID tag reading device receives high-frequency electromagnetic waves, a closed loop wire can be placed around the outer ring of the low-frequency loop antenna to generate a resistance to the electromagnetic field to prevent external alternating current. The change of the electromagnetic field improves the anti-interference ability of the antenna of the dual-frequency RFID tag reading device.

According to the fourth aspect of the present invention, a dual-frequency RFID tag reading device is proposed, including the antenna of the dual-frequency RFID tag reading device described in any one of the above technical solutions, therefore, the dual-frequency RFID tag reading The device has all the beneficial effects of the antenna of the dual-frequency RFID tag reading device described in the above technical solution.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 shows the schematic block diagram of the antenna of the anti-jamming high-frequency RFID tag reading equipment of the embodiment of the present invention;

Fig. 2 shows the connection diagram of the antenna of the anti-interference high-frequency RFID tag reading device of the first embodiment of the present invention;

Fig. 3 shows the connection diagram of the antenna of the anti-interference high-frequency RFID tag reading device of the second embodiment of the present invention;

Fig. 4 shows the connection diagram of the antenna of the anti-interference high-frequency RFID tag reading device of the third embodiment of the present invention;

Fig. 5 shows the connection diagram of the antenna of the dual-frequency RFID tag reading device of the first embodiment of the present invention;

Fig. 6 shows the connection diagram of the antenna of the dual-frequency RFID tag reading device of the second embodiment of the present invention;

Fig. 7 shows a schematic diagram of connection of antennas of the dual-frequency RFID tag reading device according to the third embodiment of the present invention.

Detailed ways

In order to have a clearer understanding of the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

The antenna of the anti-interference high-frequency RFID tag reading device according to the embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 4 .

As shown in FIG. 1 , the antenna of an anti-interference high-frequency RFID tag reading device according to an embodiment of the present invention includes: at least one high-frequency antenna loop pair 10 .

Wherein, each of the high-frequency antenna loop pairs 10 includes: a first high-frequency antenna loop 102 and a second high-frequency antenna loop 104 identical to the first high-frequency antenna loop 102, wherein the The first high-frequency antenna loop 102 includes a first initial section antenna 1022, a first loop section antenna 1024, and a first end section antenna 1026, and the second high-frequency antenna loop 104 includes a second initial section antenna 1042, a first Two loop section antennas 1044 and the second end section antenna 1046, and the first end section antenna 1026 is connected to the second start section antenna 1042; and the first high frequency antenna loop 102 receives the interference electromagnetic wave When the first resonant current is generated, the second high-frequency antenna loop 104 generates a second resonant current when receiving the interference electromagnetic wave, and the current directions of the first resonant current and the second resonant current are opposite.

The antenna of the anti-jamming high-frequency RFID tag reading device according to the present invention includes at least one high-frequency antenna loop pair 10, and each high-frequency antenna loop pair 10 includes two identical high-frequency antenna loops, and The end segment antenna 1026 of the first high frequency antenna loop 102 is connected with the start segment antenna 1042 of the second high frequency antenna loop 104, that is, the same high frequency antenna is wound to include two identical high frequency antenna loops The basic antenna structure (i.e. the high-frequency antenna loop pair 10) of the road, and the first high-frequency antenna loop 102 and the second high-frequency antenna loop 104 generate currents respectively when receiving uniform interfering electromagnetic waves from a far space Resonant currents with opposite directions, and because the two are the same high-frequency antenna loops, the resonant currents generated are equal in size, so that the resonant currents generated by the interference electromagnetic wave in the two high-frequency antenna loops cancel each other out, and because of the high When the antenna of the high-frequency RFID tag reading device reads the high-frequency RFID tag, it is relatively close to the tag, and the tag is not uniform on the two high-frequency antenna loops, and the generated resonance current will not be completely offset, and it can be Receiving the signal sent by the tag achieves the purpose of anti-interference, and improves the signal-to-noise ratio of the antenna output signal, and at the same time ensures that the antenna of the high-frequency RFID tag reading device can receive the signal sent by the high-frequency RFID tag.

Further, in the above-mentioned embodiment, the same first high-frequency antenna loop 102 and the second high-frequency antenna loop 104 in each high-frequency antenna loop pair 10 have the same shape and size, for example, they are all rectangular, Circular or elliptical, and when they are all rectangular, their length and width should be the same, and when they are both circular, their radii should be the same, so as to ensure that the resonant currents generated in the two high-frequency antenna loops can cancel each other out, In order to achieve the purpose of anti-interference; of course, those skilled in the art should understand that, in addition to the above-mentioned shape, the high-frequency antenna loop can also be other shapes, such as a square, etc., which can achieve the purpose of making the generated resonance currents cancel each other That's it.

Further, as shown in FIG. 2 , the antenna of the anti-interference high-frequency RFID tag reading device of the present invention also includes: a receiving circuit 20; and the first initial section antenna of the first high-frequency antenna loop 102 1022 and the second termination section antenna 1046 of the second high frequency antenna loop 104 are connected to the receiving circuit 20 .

In this embodiment, the first start section antenna 1022 of the first high frequency antenna loop 102 of each high frequency antenna loop pair 10 and the second end section antenna 1046 of the second high frequency antenna loop 104 are connected to the receiver The circuit 20 is used to decode the signal sent by the high-frequency RFID tag.

Specifically, since the interfering electromagnetic waves come from far away space, the interfering electromagnetic waves passing through the two high-frequency antenna loops are uniform, then according to Faraday's law, the winding paths of the two high-frequency antenna loops make the same direction pass through The resonant currents produced by the electromagnetic waves passing through each high-frequency antenna loop cancel each other out, that is, the received interference electromagnetic wave is in the first loop section antenna 1024 of the first high-frequency antenna loop 102 and the second high-frequency antenna loop 104. The current directions of the resonant currents produced by the second loop section antenna 1044 are opposite and equal in magnitude, and the current directions are shown in the arrows in Figure 2, then the resonant currents produced by the interference electromagnetic waves obtained by the receiving circuit 20 are close to zero; The high-frequency RFID tag is very close to the antenna of the anti-jamming high-frequency RFID tag reading device, and the farthest distance is also the same order of magnitude as the antenna, so the electromagnetic wave signal sent by the high-frequency RFID tag is different on these two loops. Uniform, so the resonance current generated by the electromagnetic wave signal of the high-frequency RFID tag in these two loops will not be completely canceled out, and then the receiving circuit can receive the signal sent by the high-frequency RFID tag, thereby reading the tag information successfully .

For example, when the high-frequency RFID tag is located above one of the high-frequency antenna loops, the electromagnetic wave signal of the high-frequency RFID tag received by the other loop is relatively weak, so the induced current on the receiving circuit 20 will not be completely offset; Then specifically in practical applications, high-frequency RFID tags can be read on one high-frequency antenna loop, or high-frequency RFID tags can also be read on two high-frequency antenna loops.

In any of the above embodiments, the at least one high-frequency antenna loop pair 10 is a plurality of high-frequency antenna loop pairs 10 .

In this technical solution, in order to realize the reading of the signal sent by the high-frequency RFID tag in a relatively large range, the antenna of the anti-jamming high-frequency RFID tag reading device can be arranged to include multiple pairs of high-frequency antenna loops 10.

Further, when specifically arranging the multiple high-frequency antenna loop pairs 10, it can be realized through the following specific embodiments.

Embodiment 1: The multiple high-frequency antenna loop pairs 10 are arranged side by side in sequence.

In this technical solution, when laying out, multiple high-frequency antenna loop pairs can be arranged side by side in sequence, that is, the second high-frequency antenna loop of the previous high-frequency antenna loop pair and the subsequent high-frequency antenna loop pair The first high-frequency antenna loops are arranged adjacently, and so on, so as to read the signal sent by the high-frequency RFID tag in a relatively large range.

Embodiment 2: There is an interval 106 between the first high-frequency antenna loop 102 and the second high-frequency antenna loop 104 in each of the high-frequency antenna loop pairs 10, and the interval 106 can be Accommodate the first high-frequency antenna loop 102 or the second high-frequency antenna loop 104; that is, when winding each high-frequency antenna loop pair 10, the first high-frequency antenna loop in it 102 and the second high-frequency antenna loop 104 reserve a space 106 that can accommodate the first high-frequency antenna loop 102 or the second high-frequency antenna loop 104, so as to realize a plurality of high-frequency antenna loop pairs 10 among the various layouts.

Further, the multiple high-frequency antenna loop pairs are divided into multiple high-frequency antenna loop groups, each of the high-frequency antenna loop groups includes two of the high-frequency antenna loop pairs, and each of the high-frequency antenna loop groups The first high-frequency antenna loop in the second high-frequency antenna loop pair in the high-frequency antenna loop group is located in the first high-frequency antenna loop and the first high-frequency antenna loop pair in the first high-frequency antenna loop group. In the interval between the second high-frequency antenna loops, and the second high-frequency antenna loop of the first high-frequency antenna loop pair is located in all of the second high-frequency antenna loop pairs In the interval between the first high-frequency antenna loop and the second high-frequency antenna loop; that is, when a plurality of high-frequency antenna loops are arranged, they can be grouped to obtain multiple groups of high-frequency antenna loop groups, Specifically, it can be arranged in groups of two and crossed with each other, that is, the first high-frequency antenna loop in the second high-frequency antenna loop pair in each group is arranged at the interval of the first high-frequency antenna loop pair in each group. The second high-frequency antenna loop in the inner and first high-frequency antenna loop pairs is arranged in the interval of the second high-frequency antenna loop pair to read the signal sent by the high-frequency RFID tag in a relatively large range , and ensure a relatively uniform reading distance, avoiding the reading blind zone in the interval between the first high-frequency antenna loop and the second high-frequency antenna loop of each high-frequency antenna loop pair, thereby avoiding the influence on the The reading effect of the signal sent by the high-frequency RFID tag. Among them, the reading blind area refers to: when the high-frequency RFID tag is located in the interval between two high-frequency antenna loops, the resonant currents in the two high-frequency antenna loops have little difference in size, so they are offset more seriously , the distance to read the high-frequency RFID tag will be greatly reduced, so the distance to read the high-frequency RFID tag between the two high-frequency antenna loops is uneven, the closer to the middle of the two high-frequency RFID circuits, the read The lower the distance is, the blind area may even appear, and the antenna layout in this embodiment can effectively avoid this problem.

Specifically, as shown in the embodiment shown in Figure 3, the antenna of the anti-jamming high-frequency RFID tag reading device includes two pairs of high-frequency antenna loops, arranged in a cross, the first high-frequency antenna loop, the second A high-frequency antenna loop is combined with the first receiving circuit, a third high-frequency antenna loop, a fourth high-frequency antenna loop is combined with the second receiving circuit, and the third high-frequency antenna loop is located in the first Between the high-frequency antenna loop and the second high-frequency antenna loop, and the second high-frequency antenna loop is located between the third high-frequency antenna loop and the fourth high-frequency antenna loop; In the embodiment shown in 4, the antenna of the anti-interference high-frequency RFID tag reading device includes four high-frequency antenna loop pairs. The antennas of the anti-interference high-frequency RFID tag reading device are arranged side by side. The cross-layout between each high-frequency antenna loop pair is similar to the embodiment shown in FIG. 3 , and will not be repeated here.

In other embodiments of the present invention, when multiple high-frequency antenna loop pairs are grouped, other grouping methods can also be used, such as dividing every three high-frequency antenna loop pairs into a group, or every two high-frequency antenna loop pairs Antenna loop pairs, every three high-frequency antenna loop pairs are cross-grouped, etc., then the interval between the two high-frequency antenna loops in each high-frequency antenna loop pair can be larger at this time to accommodate more high frequency antenna loop.

In any one of the above embodiments, it further includes: a closed loop wire (not shown in the figure), located at the outer circle of the at least one high-frequency antenna loop pair.

In this technical scheme, in order to further reduce the interference of other electromagnetic waves from the outside when the antenna of the anti-interference high-frequency RFID tag reading device receives high-frequency electromagnetic waves, a closed loop wire can be arranged around its outer ring to generate a Resistance to electromagnetic fields prevents changes in external alternating electromagnetic fields to further improve the anti-interference ability of the antenna.

Through the above embodiments, on the one hand, a larger reading range can be covered, and on the other hand, the occurrence of reading blind spots can be avoided.

As an embodiment of the present invention, the antenna of the anti-interference high-frequency RFID tag reading device in any of the above-mentioned embodiments can be applied to the high-frequency RFID tag reading device, therefore, the high-frequency RFID tag reading device has All the beneficial effects of the antenna of the anti-interference high-frequency RFID tag reading device described in any one of the above embodiments.

As an embodiment of the present invention, the antenna of the anti-interference high-frequency RFID tag reading device in any of the above-mentioned embodiments can be applied to the antenna of the dual-frequency RFID tag reading device, that is, in any of the above-mentioned embodiments The periphery of the antenna of the anti-jamming high-frequency RFID tag reading device is arranged with a low-frequency loop antenna 50, wherein the low-frequency loop antenna 50 is connected to a transmitting circuit 60 for sending low-frequency electromagnetic waves to a dual-frequency RFID tag to Activate the dual-frequency RFID tag; the antenna of the anti-jamming high-frequency RFID tag reading device is located in the annular area surrounded by the low-frequency loop antenna 50, for receiving the high-frequency signal sent by the dual-frequency RFID tag electromagnetic waves.

In this technical scheme, by laying a circle of low-frequency loop antenna 50 on the outer ring of the antenna of the anti-jamming high-frequency RFID tag reading device, the low-frequency electromagnetic wave sent by the low-frequency loop antenna 50 can activate the dual-frequency RFID tag, and then The antenna of the anti-interference high-frequency RFID tag reading device receives the high-frequency electromagnetic waves emitted by the dual-frequency RFID tag, and can achieve the purpose of anti-interference, thereby improving the signal-to-noise ratio of the antenna output signal.

Corresponding to the specific embodiment of the antenna of the dual-frequency RFID tag reading device of the antenna of the anti-jamming high-frequency RFID tag reading device shown in Fig. 2, Fig. 3 and Fig. 4, as shown in Fig. 5, Fig. 6 and Fig. 7, that is, a circle of low-frequency loop antenna 50 is arranged on the outer ring of the antenna of the anti-jamming high-frequency RFID tag reading device shown in Fig. 2, Fig. 3 and Fig. 4; further, the shape of the low-frequency loop antenna 50 Can be consistent with the shape of the high frequency antenna loop.

In any of the above embodiments, preferably, further comprising: a closed loop wire (not shown in the figure), located at the outer ring of the low-frequency loop antenna.

In order to further reduce the interference of other electromagnetic waves from the outside when the antenna of the entire dual-frequency RFID tag reading device receives high-frequency electromagnetic waves, a closed loop wire can be placed around the outer ring of the low-frequency loop antenna to generate a resistance to the electromagnetic field to prevent external alternating current. The change of the electromagnetic field improves the anti-interference ability of the antenna of the dual-frequency RFID tag reading device.

As an embodiment of the present invention, the antenna of the dual-frequency RFID tag reading device in the above-mentioned embodiment can be applied to the dual-frequency RFID tag reading device. Therefore, the dual-frequency RFID tag reading device has the above technical solution. All the beneficial effects of the antenna of the dual-frequency RFID tag reading device described above.

The technical scheme of the present invention has been described in detail above in conjunction with the accompanying drawings. By using the high-frequency antenna loop pair formed by two high-frequency antenna loops with the same shape and size as the basic antenna structure, the electromagnetic waves from the far space can be transmitted between the two In the high-frequency antenna loop, resonant currents of equal magnitude and opposite current direction are generated to cancel out, so as to achieve the purpose of anti-interference, thereby improving the signal-to-noise ratio of the antenna output signal.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An antenna for an anti-jamming, high frequency RFID tag reading device, comprising: at least one pair of high frequency antenna loops;

each of the high frequency antenna loop pairs comprises: the antenna comprises a first high-frequency antenna loop and a second high-frequency antenna loop which is the same as the first high-frequency antenna loop, wherein the first high-frequency antenna loop comprises a first starting section antenna, a first loop section antenna and a first termination section antenna, the second high-frequency antenna loop comprises a second starting section antenna, a second loop section antenna and a second termination section antenna, and the first termination section antenna is connected to the second starting section antenna; and

the first high-frequency antenna loop generates a first resonant current when receiving interference electromagnetic waves, the second high-frequency antenna loop generates a second resonant current when receiving the interference electromagnetic waves, the first resonant current and the second resonant current are opposite in current direction and equal in current magnitude, and the first resonant current and the second resonant current can be mutually offset;

the at least one high-frequency antenna loop pair is a plurality of high-frequency antenna loop pairs;

a space is provided between the first high-frequency antenna loop and the second high-frequency antenna loop in each of the high-frequency antenna loop pairs, and the space can accommodate the first high-frequency antenna loop or the second high-frequency antenna loop.

2. The antenna for an interference-free, high frequency RFID tag reading device of claim 1, further comprising: a receiving circuit; and

the first start segment antenna of the first high frequency antenna loop and the second end segment antenna of the second high frequency antenna loop are connected to the receiving circuit.

3. The antenna for a tamper resistant high frequency RFID tag reading apparatus of claim 1 or 2, wherein the plurality of pairs of high frequency antenna loops are arranged side by side in sequence.

4. The antenna of an interference-resistant high-frequency RFID tag reading device according to claim 1 or 2,

the plurality of high-frequency antenna loop pairs are divided into a plurality of high-frequency antenna loop groups, each of the high-frequency antenna loop groups includes two of the high-frequency antenna loop pairs, and the first high-frequency antenna loop of a second high-frequency antenna loop pair of each of the high-frequency antenna loop groups is located within an interval between the first high-frequency antenna loop and the second high-frequency antenna loop of a first high-frequency antenna loop pair, and the second high-frequency antenna loop of the first high-frequency antenna loop pair is located within an interval between the first high-frequency antenna loop and the second high-frequency antenna loop of the second high-frequency antenna loop pair.

5. The antenna for a tamper resistant high frequency RFID tag reading device according to claim 1 or 2, wherein the first and second high frequency antenna loops are identical in shape and size, wherein the shape of the first and second high frequency antenna loops comprises a rectangle, a circle or an ellipse.

6. The antenna for a tamper resistant high frequency RFID tag reading device of claim 5, further comprising:

and the closed annular conducting wire is positioned at the outer ring of the at least one high-frequency antenna loop pair.

7. A high frequency RFID tag reading apparatus, comprising: an antenna for an interference resistant high frequency RFID tag reading device as claimed in any one of claims 1 to 6.

8. An antenna for a dual-frequency RFID tag reading device, comprising: a low frequency loop antenna, and an antenna of the tamper resistant high frequency RFID tag reading device of any of claims 1 to 5;

the low-frequency loop antenna is connected to the transmitting circuit and used for transmitting low-frequency electromagnetic waves to the dual-frequency RFID tag so as to activate the dual-frequency RFID tag;

and the antenna of the anti-interference high-frequency RFID tag reading equipment is positioned in an annular area surrounded by the low-frequency annular antenna and is used for receiving high-frequency electromagnetic waves sent by the double-frequency RFID tag.

9. The antenna of the dual-band RFID tag reading device of claim 8, further comprising:

and the closed annular conducting wire is positioned on the outer ring of the low-frequency annular antenna.

10. A dual-frequency RFID tag reading apparatus, characterized by comprising an antenna of the dual-frequency RFID tag reading apparatus according to claim 8 or 9.

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