CN212906334U - Ultrahigh frequency single-channel radio frequency reader-writer module - Google Patents
Ultrahigh frequency single-channel radio frequency reader-writer module Download PDFInfo
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- CN212906334U CN212906334U CN202021791392.5U CN202021791392U CN212906334U CN 212906334 U CN212906334 U CN 212906334U CN 202021791392 U CN202021791392 U CN 202021791392U CN 212906334 U CN212906334 U CN 212906334U
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Abstract
The utility model discloses an hyperfrequency single channel radio frequency reader writer module, including reader writer chip, coupler, receiving balun, carrier wave offset balun, power detection chip and power amplifier chip, the first end of reader writer chip through receiving balun connection coupler, the second end that the reader writer chip passes through carrier wave offset balun and power detection chip connection coupler, the third end that the reader writer chip passes through power amplifier chip connection coupler, the antenna is connected through the antenna radio frequency line in the fourth end of coupler. The radio frequency signal output by the reader-writer chip is amplified by the power amplifier chip, is connected to the coupler and is transmitted out by the antenna. The coupler couples out a radio frequency signal, and the radio frequency signal is received the balun and the carrier wave offset balun, and is simultaneously connected with a power detection chip, so that a carrier wave leakage signal leaked into the reader-writer is offset, carrier wave offset is completed, signal interference caused by carrier wave leakage is eliminated, and the sensitivity of the reader-writer is improved.
Description
Technical Field
The utility model relates to an hyperfrequency radio frequency circuit technical field especially relates to a hyperfrequency single channel radio frequency reader module.
Background
The Radio Frequency Identification (RFID) technology is a non-contact automatic identification technology, realizes automatic identification by using the space transmission and coupling characteristics of radio frequency signals, feeds power to a passive tag through electromagnetic waves of a reader-writer, and simultaneously realizes wireless communication between the reader-writer and the tag by modulating carrier waves, thereby realizing non-contact information transmission between the reader-writer and the tag. The ultrahigh frequency band RFID system has the advantages of long communication distance, high communication speed between the tag and the reader-writer, low tag manufacturing cost and the like, is suitable for numerous fields of storage logistics management, vehicle personnel management and the like, and is an important technical method and means for realizing Internet of things engineering application.
In the conventional ultrahigh frequency reader-writer, when the reader-writer works, a continuous carrier signal is transmitted, a passive tag returns a reflected wave carrying tag information after receiving the signal, and the reader-writer still continues to transmit the continuous carrier while receiving the signal returned by the tag. In the process, a large number of carrier signals enter a receiving link of the reader-writer due to the reasons of insufficient isolation of the circulator or the directional coupler and the like, so that the sensitivity is low.
The above disadvantages need to be improved.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, the utility model provides a hyperfrequency single channel radio frequency reader module.
The utility model discloses technical scheme as follows:
the ultrahigh-frequency single-channel radio-frequency reader-writer module comprises a reader-writer chip, a coupler, a receiving balun, a carrier wave counteracting balun, a power detection chip and a power amplifier chip, wherein the reader-writer chip is connected with the first end of the coupler through the receiving balun, the reader-writer chip is connected with the second end of the coupler through the carrier wave counteracting balun and the power detection chip, the reader-writer chip is connected with the third end of the coupler through the power amplifier chip, and the fourth end of the coupler is connected with an antenna through an antenna radio-frequency line.
According to above-mentioned scheme the utility model discloses, a serial communication port, the read write line chip is located the well upper portion of PCB board, it is located to receive the balun the left side of read write line, the carrier wave is offset the balun and is located the left side of read write line just is located receive the below of balun, the coupler is located the left side that the balun was offset to the carrier wave just is located the left side of PCB board, the power detection chip is located the right side below of coupler, the power amplifier chip is located the below of coupler just is located the below of power detection chip.
Furthermore, the reader-writer is connected with the power amplifier chip through a power amplifier radio frequency line, and the corner of the power amplifier radio frequency line is an arc-shaped routing line.
According to above scheme the utility model discloses, a serial communication port, still be equipped with microprocessor on the PCB board, microprocessor is located the right side of PCB board.
Further, the microprocessor is connected with the reader-writer chip.
According to the above scheme the utility model discloses, a serial communication port, still be equipped with power module on the PCB board, power module is located left side below on the PCB board.
Further, the power module supplies power to the radio frequency reader-writer module.
According to above-mentioned scheme the utility model discloses, a serial communication port, the read write line chip is R2000 hyperfrequency read write line chip.
According to the above scheme the utility model discloses, its beneficial effect lies in, the radio frequency signal of reader-writer chip output is connected to the coupler through power amplifier chip with signal amplification to go out radio frequency signal transmission through the antenna. The coupler couples out a radio frequency signal, and the radio frequency signal is received the balun and the carrier wave offset balun, and is simultaneously connected with a power detection chip, so that a carrier wave leakage signal leaked into the reader-writer is offset, carrier wave offset is completed, signal interference caused by carrier wave leakage is eliminated, and the sensitivity of the reader-writer is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of the present invention.
Fig. 2 is the schematic diagram of the layout structure of the PCB of the present invention.
Fig. 3 is an enlarged view of fig. 2.
In the figures, the various reference numbers:
1. the device comprises a reader-writer chip, 2, a coupler, 3, a receiving balun, 4, a carrier wave counteracting balun, 5, a power detection chip, 6, a power amplifier chip, 7, a power supply module, 8, an antenna, 9, a microprocessor, 10, an antenna radio frequency line, 11 and a power amplifier radio frequency line.
Detailed Description
The invention is further described with reference to the following figures and embodiments:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, an ultrahigh frequency single channel radio frequency reader-writer module includes a reader-writer chip 1, a coupler 2, a receiving balun 3, a carrier cancellation balun 4, a power detection chip 5 and a power amplifier chip 6, where the reader-writer chip 1 is connected to a first end of the coupler 2 through the receiving balun 3, the reader-writer chip 1 is connected to a second end of the coupler 2 through the carrier cancellation balun 4 and the power detection chip 5, the reader-writer chip 1 is connected to a third end of the coupler 2 through the power amplifier chip 6, and a fourth end of the coupler 2 is connected to an antenna 8 through an antenna radio frequency line 10.
In the present invention, the first end of the coupler 2 is connected to the receiving balun 3 for converting the single-ended rf signal into a differential signal to resist common mode interference; the second end of the coupler 2 is respectively connected with the carrier cancellation balun 4 and the power detection chip 5, so that the carrier cancellation effect is achieved; the third end of the coupler 2 is connected with the power amplifier chip 6, the fourth end of the coupler 2 is connected with the antenna 8 and used for transmitting signals and receiving signals, and the microprocessor 9 is connected with the reader-writer chip 1.
The utility model discloses in, microprocessor 9 is connected with reader-writer chip 1, and power module 7 is the power supply of radio frequency reader-writer module.
The radio frequency signal output by the reader-writer chip 1 is amplified by the power amplifier chip 6, is connected to the coupler 2 and is transmitted by the antenna 8. The coupler 2 couples out a radio frequency signal, and by receiving the balun 3 and the carrier cancellation balun 4, and simultaneously connecting a power detection chip 5, a carrier leakage signal leaked into the reader-writer is cancelled, and carrier cancellation is completed, so that signal interference caused by carrier leakage is eliminated, and the sensitivity of the reader-writer is improved.
As shown in fig. 2-3, the reader-writer chip 1 is located at the middle-upper portion of the PCB, the receiving balun 3 is located at the left side of the reader-writer, the carrier cancellation balun 4 is located at the left side of the reader-writer and below the receiving balun 3, the coupler 2 is located at the left side of the carrier cancellation balun 4 and at the left side of the PCB, the power detection chip 5 is located at the right lower portion of the coupler 2, the power amplifier chip 6 is located below the coupler 2 and below the power detection chip 5, the microprocessor 9 is located at the right side of the PCB, and the power module 7 is located at the left lower portion of the PCB.
The utility model discloses in, the read write line passes through power amplifier radio frequency line 11 and connects power amplifier chip 6, and the turning of power amplifier radio frequency line 11 is the arc and walks the line. The corners of the power amplifier radio frequency line 11 and the antenna radio frequency line 10 are both arc-shaped wiring lines, so that the signal transmission is fast. The reader-writer chip 1, the receiving balun 3, the carrier cancellation balun 4 and the coupler 2 are arranged on the PCB compactly, the distance of connected wires is short, signal interference is small, and the signal receiving and transmitting performance is further enhanced.
The utility model discloses in, reader writer chip 1 is R2000 hyperfrequency reader writer chip 1.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
The above exemplary description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above manner, and various improvements made by the method concept and technical solution of the present invention or by directly applying the concept and technical solution of the present invention to other occasions without improvement are all within the protection scope of the present invention.
Claims (8)
1. The ultrahigh-frequency single-channel radio-frequency reader-writer module is characterized by comprising a reader-writer chip, a coupler, a receiving balun, a carrier counteracting balun, a power detection chip and a power amplifier chip, wherein the reader-writer chip is connected with the first end of the coupler through the receiving balun, the reader-writer chip is connected with the second end of the coupler through the carrier counteracting balun and the power detection chip, the reader-writer chip is connected with the third end of the coupler through the power amplifier chip, and the fourth end of the coupler is connected with an antenna through an antenna radio-frequency line.
2. The module of claim 1, wherein the reader chip is located at a middle upper portion of a PCB board, the receiving balun is located at a left side of the reader, the carrier cancellation balun is located at a left side of the reader and below the receiving balun, the coupler is located at a left side of the carrier cancellation balun and at a left side of the PCB board, the power detection chip is located at a right lower portion of the coupler, and the power amplifier chip is located below the coupler and below the power detection chip.
3. The module of claim 2, wherein the reader is connected to the power amplifier chip via a power amplifier rf line, and the corners of the power amplifier rf line are curved traces.
4. The uhf single-channel rf reader module of claim 2, wherein the PCB board further includes a microprocessor, and the microprocessor is located on the right side of the PCB board.
5. The UHF single channel RF reader module as in claim 4, wherein the microprocessor is connected to the reader chip.
6. The uhf single-channel rf reader module of claim 2, wherein a power module is further disposed on the PCB, and the power module is located at a lower left portion of the PCB.
7. The UHF single channel RF reader module as claimed in claim 6, wherein the power module supplies power to the RF reader module.
8. The UHF single channel RF reader module as claimed in claim 1, wherein the reader chip is an R2000 UHF reader chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021791392.5U CN212906334U (en) | 2020-08-25 | 2020-08-25 | Ultrahigh frequency single-channel radio frequency reader-writer module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021791392.5U CN212906334U (en) | 2020-08-25 | 2020-08-25 | Ultrahigh frequency single-channel radio frequency reader-writer module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212906334U true CN212906334U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021791392.5U Active CN212906334U (en) | 2020-08-25 | 2020-08-25 | Ultrahigh frequency single-channel radio frequency reader-writer module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212906334U (en) |
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- 2020-08-25 CN CN202021791392.5U patent/CN212906334U/en active Active
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