CN210776754U - Single-port ultrahigh frequency radio frequency identification reader-writer - Google Patents
Single-port ultrahigh frequency radio frequency identification reader-writer Download PDFInfo
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- CN210776754U CN210776754U CN201922288494.9U CN201922288494U CN210776754U CN 210776754 U CN210776754 U CN 210776754U CN 201922288494 U CN201922288494 U CN 201922288494U CN 210776754 U CN210776754 U CN 210776754U
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Abstract
The utility model relates to a single-port ultrahigh frequency radio frequency identification reader-writer, which comprises a reader-writer circuit with the surface attached on a circuit board; the reader-writer circuit comprises a microprocessor, a reader-writer main chip, a power amplifier, a radio frequency filter, a first balun, a second balun, a coupler and a power supply module, wherein the microprocessor is connected with the reader-writer main chip in a communication mode, the transmitting end of the reader-writer main chip is connected with the input end of the power amplifier, the output end of the power amplifier is connected to the input end of the coupler after passing through the radio frequency filter, the isolating end of the coupler is connected to the receiving end of the reader-writer main chip through the first balun, and the coupling end of the coupler is connected to the carrier elimination input end of the reader-writer main chip through the second balun. The utility model relates to a single port hyperfrequency radio frequency identification read write line, it can be convenient carry out the modularization and use to reduce the design degree of difficulty, reduce the research and development cycle of new product.
Description
Technical Field
The utility model relates to a radio frequency identification reader especially relates to a single port hyperfrequency radio frequency identification reader.
Background
At present, the conventional ultrahigh frequency radio frequency identification reader-writer application products on the market have the problem of complex design, and designers need to redesign the circuit design and the PCB layout completely in different application scenes, so that the development period of new products is longer. Meanwhile, the conventional radio frequency reader-writer product adopts a single-layer circuit board design, so that the product volume is large, and miniaturization and modular design and application are not facilitated; therefore, an ultrahigh frequency radio frequency identification reader-writer capable of realizing modularization and miniaturization is needed; therefore, the radio frequency read-write core module is integrated on a PCB, when a new reader-writer is developed to be applied, the module can be directly used as a patch element, and at the moment, only a peripheral auxiliary circuit needs to be built.
Disclosure of Invention
An object of the utility model is to overcome the aforesaid not enough, provide a single port hyperfrequency radio frequency identification read write line, it can be convenient carry out the modularization and use to reduce the design degree of difficulty, reduce the research and development cycle of new product, simultaneously through the design of multilayer PCB board, not only very big reduction the size of product, the separation through signal layer and power supply layer, ground plane has improved the performance of product moreover.
The purpose of the utility model is realized like this:
a single-port ultrahigh frequency radio frequency identification reader-writer comprises a reader-writer circuit with the surface attached to a circuit board;
the circuit board is a four-layer board and sequentially comprises a surface mounting layer, a grounding layer, a power supply wiring layer and a signal wiring layer from top to bottom;
the reader-writer circuit comprises a microprocessor, a reader-writer main chip, a power amplifier, a radio frequency filter, a first balun, a second balun, a coupler and a power module, wherein the microprocessor, the reader-writer main chip, the power amplifier, the radio frequency filter, the first balun, the second balun, the coupler and the power module are all attached to a surface mounting layer, the microprocessor is connected with the reader-writer main chip in a communication mode, a transmitting end of the reader-writer main chip is connected with an input end of the power amplifier, an output end of the power amplifier is connected to an input end of the coupler through the radio frequency filter, an isolating end of the coupler is connected to a receiving end of the reader-writer main chip through the first balun, and a coupling end of the coupler is connected to a carrier elimination input end of the reader-writer main chip through the second balun.
The utility model relates to a single port hyperfrequency radio frequency identification read write line is connected through the via hole that passes ground plane and power wiring layer between surface mounting layer and the signal routing layer, is connected through the via hole that passes the ground plane between surface mounting layer and the power wiring layer, and installs antenna interface on the surface mounting layer.
The utility model relates to a single port hyperfrequency radio frequency identification read write line, be connected with resistance pi type attenuator between the coupling end of coupler and the second balun connection.
The utility model relates to a single port hyperfrequency radio frequency identification read write line, power module is microprocessor, read write line main chip and power amplifier power supply.
The utility model relates to a single port hyperfrequency radio frequency identification read write line, the read write line circuit still includes the crystal oscillator of subsides dress on the surface mounting layer, and this crystal oscillator links to each other with the chronogenesis interface of read write line owner chip.
The utility model relates to a single port hyperfrequency radio frequency identification read write line, the model of read write line main chip is magicRF M100 integrated chip; the model of the power amplifier is RF 3225.
Compared with the prior art, the beneficial effects of the utility model are that:
the main components are integrated to form a reader-writer, so that a reader-writer developer can directly attach the product to a target circuit board for expansion to form a terminal product; in the whole re-design process, designers can quickly develop a finished product of the reader-writer by adding a simple peripheral control circuit, a packaging shell and the like without carrying out complicated radio frequency circuit and related PCB design, thereby greatly accelerating the development speed of the whole reader-writer and reducing the development difficulty; meanwhile, the application of the multilayer PCB not only reduces the volume, but also improves the product performance.
Drawings
Fig. 1 is a circuit block diagram of the utility model relates to a single-port ultrahigh frequency radio frequency identification reader.
Fig. 2-5 are the utility model relates to a lay schematic diagram of the first layer, the second floor, the third layer, the fourth layer of the PCB board of single-port hyperfrequency radio frequency identification read write line.
Wherein:
the MCU is used for the integral control of the reader-writer and has the model of M058ZDN or compatible model;
the reader-writer main chip (RFIC) is used for realizing the functions of up/down conversion, modulation/demodulation, amplification, digital-to-analog/analog-to-digital conversion, coding and decoding, protocol processing, parameter control and the like of signals; the model is a MagicRF M100 integrated chip;
the power amplifier is used for amplifying the transmitting signal to the required power and is an RF3225 power amplification chip;
the first Balun (Balun) is mainly used for converting a single-ended radio frequency signal into a differential signal and resisting common-mode interference; the model is BD0810J50100 AHF;
a second Balun (Balun) for converting the single-ended signal of the carrier cancellation channel into a differential signal; the selected model is B0322J5050 AHF;
the coupler is used for realizing transmitting and receiving isolation, and the selected types are as follows: DC0710J5010 AHF; the radio frequency filter is used for filtering signals out of a frequency band and is provided with a model number 0915LP15B 026;
the power supply module is used for providing stable power supply for each circuit and selects a power supply chip with the model number of MIC 5330;
the crystal oscillator is used for providing a reference clock for the main chip of the reader-writer, and the model of the crystal oscillator is a passive crystal of 26 MHz.
Detailed Description
Referring to fig. 1-5, the utility model relates to a single-port ultrahigh frequency radio frequency identification reader-writer, which comprises a reader-writer circuit with the surface attached to a circuit board;
the circuit board is a four-layer board and sequentially comprises a surface mounting layer, a grounding layer, a power supply wiring layer and a signal wiring layer from top to bottom; the surface mounting layer is connected with the signal wiring layer through a via hole penetrating through the ground layer and the power wiring layer, the surface mounting layer is connected with the power wiring layer through a via hole penetrating through the ground layer, and an antenna interface is arranged on the surface mounting layer;
the reader-writer circuit comprises a microprocessor, a reader-writer main chip, a power amplifier, a radio frequency filter, a first balun, a second balun, a coupler and a power module, wherein the microprocessor, the reader-writer main chip, the power amplifier, the radio frequency filter, the first balun, the second balun, the coupler and the power module are all attached to a surface mounting layer;
further, a resistor pi-type attenuator is connected between the coupling end of the coupler and the second balun connection and is used for adjusting the input power;
furthermore, the power supply module supplies power to the microprocessor, the reader-writer main chip and the power amplifier;
furthermore, the reader-writer circuit also comprises a crystal oscillator attached to the surface mounting layer, and the crystal oscillator is connected with a time sequence interface of the reader-writer main chip;
furthermore, the type of the main chip of the reader-writer is a MagicRF M100 integrated chip; the model of the power amplifier is RF 3225;
in addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.
Claims (6)
1. A single-port ultrahigh frequency radio frequency identification reader-writer is characterized in that: comprises a reader-writer circuit with the surface attached on a circuit board;
the circuit board is a four-layer board and sequentially comprises a surface mounting layer, a grounding layer, a power supply wiring layer and a signal wiring layer from top to bottom;
the reader-writer circuit comprises a microprocessor, a reader-writer main chip, a power amplifier, a radio frequency filter, a first balun, a second balun, a coupler and a power module, wherein the microprocessor, the reader-writer main chip, the power amplifier, the radio frequency filter, the first balun, the second balun, the coupler and the power module are all attached to a surface mounting layer, the microprocessor is connected with the reader-writer main chip in a communication mode, a transmitting end of the reader-writer main chip is connected with an input end of the power amplifier, an output end of the power amplifier is connected to an input end of the coupler through the radio frequency filter, an isolating end of the coupler is connected to a receiving end of the reader-writer main chip through the first balun, and a coupling end of the coupler is connected to a carrier elimination input end of the reader-writer main chip through the second balun.
2. The single-port uhf radio frequency identification reader of claim 1, wherein: the surface mounting layer is connected with the signal wiring layer through a via hole penetrating through the ground layer and the power wiring layer, the surface mounting layer is connected with the power wiring layer through a via hole penetrating through the ground layer, and the surface mounting layer is provided with an antenna interface.
3. The single-port uhf radio frequency identification reader of claim 1, wherein: and a resistance pi type attenuator is connected between the coupling end of the coupler and the second balun connection.
4. The single-port uhf radio frequency identification reader of claim 1, wherein: the power supply module supplies power to the microprocessor, the reader-writer main chip and the power amplifier.
5. The single-port uhf radio frequency identification reader of claim 1, wherein: the reader-writer circuit also comprises a crystal oscillator attached to the surface mounting layer, and the crystal oscillator is connected with a time sequence interface of the reader-writer main chip.
6. The single-port uhf radio frequency identification reader of claim 1, wherein: the type of the main chip of the reader-writer is a MagicRF M100 integrated chip; the model of the power amplifier is RF 3225.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922288494.9U CN210776754U (en) | 2019-12-18 | 2019-12-18 | Single-port ultrahigh frequency radio frequency identification reader-writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922288494.9U CN210776754U (en) | 2019-12-18 | 2019-12-18 | Single-port ultrahigh frequency radio frequency identification reader-writer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210776754U true CN210776754U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922288494.9U Active CN210776754U (en) | 2019-12-18 | 2019-12-18 | Single-port ultrahigh frequency radio frequency identification reader-writer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210776754U (en) |
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2019
- 2019-12-18 CN CN201922288494.9U patent/CN210776754U/en active Active
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