CN211236912U - High-performance radio frequency identification reader-writer - Google Patents

Abstract

The utility model relates to a high performance radio frequency identification reader, the circuit board of reader is four-layer board, and this circuit board is surface mounting layer (1), ground plane (2), power wiring layer (3) and signal routing layer (4) from top to bottom in proper order; the surface mounting layer (1) is connected with the signal wiring layer (4) through a via hole penetrating through the ground layer (2) and the power wiring layer (3), and the surface mounting layer (1) is connected with the power wiring layer (3) through a via hole penetrating through the ground layer (2). The utility model relates to a high performance radio frequency identification read write line, it passes through the design of multilayer PCB board, not only very big reduction the size of product, moreover through the separation of signal layer and power plane, ground plane improved the performance of product.

Description

High-performance radio frequency identification reader-writer

Technical Field

The utility model relates to a radio frequency identification reader especially relates to a product can outstanding radio frequency identification reader.

Background

At present, the conventional radio frequency reader-writer products on the market adopt a single-layer circuit board design, so that the product size is larger, and miniaturization, modular design and application are not facilitated; therefore, a need exists for a modular and compact uhf rfid reader.

Disclosure of Invention

An object of the utility model is to overcome the aforesaid not enough, provide a high performance radio frequency identification read write line, it passes 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 high-performance radio frequency identification reader-writer is characterized in that a circuit board of the reader-writer is a four-layer board, and the circuit board 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, and the surface mounting layer is connected with the power wiring layer through a via hole penetrating through the ground layer.

The utility model relates to a high performance radio frequency identification read write line installs antenna interface on the surface mounting layer.

The utility model relates to a high performance radio frequency identification read write line, the circuit board facing is equipped with the read write line circuit, the read write line circuit includes microprocessor, read write line main chip, power amplifier, radio frequency filter, balun and power module, microprocessor, read write line main chip, power amplifier, radio frequency filter, balun and power module all paste and adorn on the surface mounting layer, the read write line circuit includes microprocessor and the read write line main chip that the communication links to each other, the transmitting terminal of read write line main chip links to each other with power amplifier's input, power amplifier's output is outwards launched behind radio frequency filter, power amplifier's coupling end is connected to the receiving terminal of read write line main chip through balun.

Compared with the prior art, the beneficial effects of the utility model are that:

the reader-writer adopts the application of the multilayer PCB, so that the volume is reduced, and the signal, the power supply and the ground are mutually separated, thereby achieving the electromagnetic isolation capability and improving the product performance.

Drawings

Fig. 1 is a schematic structural diagram of a circuit board of a high-performance radio frequency identification reader-writer. .

Fig. 2-4 are the utility model relates to a Layout schematic diagram of second layer, third layer, fourth layer of PCB board of high performance radio frequency identification reader-writer.

Fig. 5 is a circuit block diagram of the high-performance rfid reader of the present invention.

Wherein:

the surface mounting layer 1, the grounding layer 2, the power supply wiring layer 3 and the signal wiring layer 4;

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 transmission signal to the required power, is an RF7418 power amplification chip and is internally provided with a directional coupler;

the Balun (Balun) is used for converting a single-ended radio frequency signal into a differential signal and resisting common-mode interference; model number BD0810J50100 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. 1-4, the circuit board of the high performance rfid reader of the present invention is a four-layer board, which sequentially comprises a surface mounting layer 1, a ground layer 2, a power wiring layer 3 and a signal wiring layer 4 from top to bottom; the surface mounting layer 1 is connected with the signal wiring layer 4 through a via hole penetrating through the ground layer 2 and the power wiring layer 3, the surface mounting layer 1 is connected with the power wiring layer 3 through a via hole penetrating through the ground layer 2, and an antenna interface is arranged on the surface mounting layer 1;

referring to fig. 5, a reader circuit is mounted on the circuit board, the reader circuit includes a microprocessor, a reader main chip, a power amplifier, a radio frequency filter, a balun and a power module, the microprocessor, the reader main chip, the power amplifier, the radio frequency filter, the balun and the power module are mounted on the surface mounting layer 1, the reader circuit includes a microprocessor and a reader main chip which are connected in communication, a transmitting end of the reader main chip is connected with an input end of the power amplifier, an output end of the power amplifier is connected to an antenna interface after passing through the radio frequency filter, and a coupling end of the power amplifier is connected to a receiving end of the reader main chip through the balun;

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 1, and the crystal oscillator is connected with a time sequence interface of a main chip of the reader-writer;

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 7418;

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 (3)

1. A high performance radio frequency identification reader characterized by: the circuit board of the reader-writer is a four-layer board, and the circuit board sequentially comprises a surface mounting layer (1), a grounding layer (2), a power supply wiring layer (3) and a signal wiring layer (4) from top to bottom; the surface mounting layer (1) is connected with the signal wiring layer (4) through a via hole penetrating through the ground layer (2) and the power wiring layer (3), and the surface mounting layer (1) is connected with the power wiring layer (3) through a via hole penetrating through the ground layer (2).

2. The high performance radio frequency identification reader of claim 1, wherein: the surface mounting layer (1) is provided with an antenna interface.

3. The high performance radio frequency identification reader of claim 1, wherein: the circuit board is provided with a reader-writer circuit in an attached mode, the reader-writer circuit comprises a microprocessor, a reader-writer main chip, a power amplifier, a radio frequency filter, a balun and a power module, the microprocessor, the reader-writer main chip, the power amplifier, the radio frequency filter, the balun and the power module are all attached to the surface attaching layer (1), the reader-writer circuit comprises the microprocessor and the reader-writer main chip which are connected 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 transmits outwards after passing through the radio frequency filter, and the coupling end of the power amplifier is connected to the receiving end of the reader-writer main chip through the balun.

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