CN201821344U

CN201821344U - 433M50mW wireless transceiver

Info

Publication number: CN201821344U
Application number: CN201020273437XU
Authority: CN
Inventors: 贾灵; 王薪宇; 汪红良; 郑淑军; 顾航
Original assignee: LIERDA SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: Lierda Science & Technology Group Co., Ltd.
Priority date: 2010-07-28
Filing date: 2010-07-28
Publication date: 2011-05-04
Anticipated expiration: 2020-07-28

Abstract

The utility model relates to a 433M50mW wireless transceiver aiming at solving the problems that in the prior art, the number of the used modules are more, the circuit is complex, the price is high and the performance is hard to guarantee. The 433M50mW wireless transceiver comprises a radio-frequency circuit, and a low-frequency circuit, wherein the radio frequency circuit comprises a 26M crystal oscillation matching circuit, a 433M whip antenna, a CC1101 radio-frequency integrated chip, a 433M frequency-band barron circuit, a 50mW power amplifying circuit, a 433M frequency-band receiving low-pass filter circuit and a 433 frequency-band transmitting low-pass filter circuit; and the low-frequency circuit comprises a microcontroller and a power supply, an interface and an indicator light which are connected with the microcontroller. In the 433M50mW wireless transceiver, due to adoption of the CC1101 radio-frequency integrated chip, the whole circuit is simplified, the cost is reduced, the power consumption is reduced and the transmission performance is improved.

Description

A kind of 433M 50mW wireless transceiver

Technical field

The utility model relates to field of wireless transmission, and in particular, the utility model is a kind of 433M 50mW wireless transceiver about Internet of Things.

Background technology

At present, the Internet of Things wireless transceiver is mainly used in the automatic centralized meter-reading system of building, is specially adapted to radio meter register occasions such as water meter, gas meter, hotlist, ammeter; Industry remote sensing, remote measurement communication; Home wireless security protection, monitoring The Cloud Terrace, power of computer room, Fan Equipment wireless remote-controlled alarm system; Active RFID tag identification; Intelligent wireless terminal, Medical Instruments such as POS system, PDA; Electronic stop plate, intelligent public transportation dispatching system; It is more and more indispensable part on modern each big civilian consumer electronics, the industry control electron-like function.

Patent Office of the People's Republic of China discloses a CN101534133A document on September 16th, 2009, name is called a kind of radio receiving-transmitting unit, and this machine comprises: digital circuit blocks, analog module, switching controls module, selector switch, transmitting-receiving modular converter and antenna; Wherein, analog module comprises emission path and multiplexing reception path; By switching controls module controls transmitting-receiving modular converter and selector switch work, when the transmitting-receiving modular converter was connected antenna with the emission path, selector switch was connected the digital pre-distortion DPD processing unit of digital circuit blocks, and multiplexing reception path is received path as feedback; When the transmitting-receiving modular converter was connected antenna and multiplexing reception path, selector switch was connected the digital signal processing unit of digital circuit blocks.Its shortcoming is to use module many, the circuit complexity, and the price height, performance is difficult to guarantee.

Summary of the invention

The utility model has solved existing in prior technology and has used module many, the circuit complexity, and the price height, the problem that performance is difficult to guarantee provides a kind of 470M 50mW wireless transceiver, and use module seldom just can reach the requirement of wireless transmission.

The technical scheme that its technical problem that solves the utility model adopts is: the utility model comprises radio circuit, low-frequency channel, and described radio circuit comprises that 26M crystal oscillator match circuit, 433M whip antenna, CC1101 radio frequency integrated chip, 433M frequency range balun circuit, 50mW power amplifier, 433M frequency range receive low-pass filter circuit, the 433M frequency range sends low-pass filter circuit; Described 26M crystal oscillator match circuit links to each other with CC1101 radio frequency integrated chip, described CC1101 radio frequency integrated chip links to each other with the end of low-frequency channel with 433M frequency range balun circuit, the other end of 433M frequency range balun circuit links to each other with the end that the 433M frequency range receives low-pass filter circuit, the other end that the 433M frequency range receives low-pass filter circuit links to each other with the 433M whip antenna, 433M frequency range balun circuit links to each other with the end that the 433M frequency range sends low-pass filter circuit by the 50mW power amplifier, and the other end that the 433M frequency range sends low-pass filter circuit links to each other with the 433M whip antenna; Described low-frequency channel comprises power supply, interface, and described power supply links to each other with interface, radio circuit.The data that the user will need to send when sending data send to wireless transceiver with the SPI form, transceiver passes through 2-FSK with digital signal, GFSK, OOK, be loaded on the 433M frequency range after the modulation of debud modes such as MSK, by 433M eight human relations circuit and 433M low-pass filter circuit, 433M 50mW power amplifier partly waits the front end match circuit finally by spring signal to be sent with form of electromagnetic wave, when receiving data, when spring antenna receives airborne effective electromagnetic wave, to not have limited signal by front end high frequency match circuit and return integrated chip to CC1101, demodulation process through the simulation part, analog high frequency is changed into intermediate-freuqncy signal, again through by SPI the data that receive being exported after the processing of numerical portion; Described radio circuit is worked in the frequency range of 433 ± 10MHz, and transmitting power is 50MW, emission current≤95mA, received current≤23mA; Sleep current≤40uA, can be for a long time under 3.0 ~ 3.6V operating voltage normal steady operation; Adopt the SPI interface with external data communication, can directly link to each other with single-chip microcomputer, software programming is very convenient.

As preferably, described interface is 2.0 single pin x9,2.0 single pin x5, and described 2.0 single pin x9,2.0 single pin x5 link to each other with CC1101 radio frequency integrated chip, and 2.0 single pin x9 also link to each other with power supply.2.0 single pin x9 is used for to wireless module power supply, output transmission, State Control; 2.0 single pin x5 is arranged on the front end of wireless transceiver, directly with systematically the linking to each other of user, further increases the ground connection performance of wireless transceiver; Pass through interface, the user can directly connect single-chip microcomputer, can be by single-chip microcomputer to multiple operations such as the reception of wireless transceiver, emission, sleep, speed, channel, communication patterns, thereby the problem when directly being connected by peripheral apparatus between two or more products of avoiding needing to communicate by letter within module efficient communication scope on the issuable line configuring improves the comprehensive competitive power of a whole set of products simultaneously.

As preferably, described power supply comprises LDO circuit, decoupling circuit, and an end of described LDO circuit links to each other with microcontroller, and the other end of LDO circuit links to each other with CC1101 radio frequency integrated chip by decoupling circuit.Select the LDO circuit that noise factor is little, quiescent dissipation is little, leakage current is low, output current is big, input and output pressure reduction is little for use, guaranteeing provides the high-quality stable power to wireless transceiver, and then avoids wireless transceiver to cause the deviation of communication frequency because of voltage fluctuation; Decoupling circuit reduces the influence of the ripple coefficient of external power source to radio circuit, increases the ground connection effect on radio-frequency module high frequency ground.

As preferably, be provided with radome at described radio circuit, radome surrounds whole radio circuit.Radio circuit, and is done good earth and is handled its comprehensive covering with radome; Reduce outside high-frequency noise greatly to the radio circuit Effect on Performance.

The beneficial effects of the utility model are: by adopting CC1101 radio frequency integrated chip, simplified entire circuit, reduced cost, reduced power consumption, dwindled overall dimension, improved transmission performance; Reliable transmission is apart from 600m-800m.

Description of drawings

Fig. 1 is that a kind of circuit of the utility model 433M 50mW wireless transceiver connects block diagram.

Among the figure: 1. 433M whip antenna, 2. the 433M frequency range low pass circuit that accepts filter, 3. 433M frequency range balun circuit, 4. CC1101 radio frequency integrated chip, 5. 2.0 single pin x5,6. 26M crystal oscillator match circuit, 7. decoupling circuit, 8.LDO circuit, 9. 2.0 single pin x9,10. 50mW power amplifier, 11. 433M frequency ranges send low-pass filter circuit.

Embodiment

Below by specific embodiment, and in conjunction with the accompanying drawings the technical solution of the utility model is described in further detail.

Embodiment:

A kind of 433M 50mW wireless transceiver of present embodiment, referring to Fig. 1, comprise radio circuit and low-frequency channel, radio circuit comprises that 26M crystal oscillator match circuit 6,433M whip antenna 1, CC1101 radio frequency integrated chip 4,433M frequency range balun circuit 3,433M frequency range receive low-pass filter circuit 2,50mW power amplifier 10,433M frequency range transmission low-pass filter circuit 11, and low-frequency channel comprises decoupling circuit 7, LDO circuit 8,2.0 single pin x9 9,2.0 single pin x5 5; CC1101 radio frequency integrated chip 4 is connected with 26M crystal oscillator match circuit 6,470M frequency range balun circuit 3, decoupling circuit 7,2.0 single pin x5 5 as the core of radio circuit, 433M frequency range balun circuit 3 receives low-pass filter circuit 2 by the 433M frequency range and links to each other with 433M whip antenna 1,433M frequency range balun circuit 3 also links to each other with an end of 50mW power amplifier 10, and the other end of 50mW power amplifier 10 sends low-pass filter circuit 11 by the 433M frequency range and links to each other with 433M whip antenna 1; Decoupling circuit 7 also links to each other with LDO circuit 8.

Radio circuit, and is done good earth and is handled its comprehensive covering with radome.

The communication data that needs are sent sends to wireless transceiver with the SPI form, and transceiver is loaded on the 433M frequency range after digital signal is modulated by debud modes such as 2-FSK, GFSK, OOK, MSK, sends with form of electromagnetic wave; After wireless transceiver receives the valid wireless signal, through the demodulation process of simulation part, pass through the processing of numerical portion again, by SPI the data that receive are exported at last; Transceiver is worked in the frequency range of 433 ± 10MHz, and transmitting power is 50MW, emission current≤95mA, and received current≤23mA, sleep current≤40uA can normal for a long time steady operation under 3.0 ~ 3.6V operating voltage.

Above-described embodiment is one of preferred plan of the present utility model, is not the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.

Claims

1. 433M 50mW wireless transceiver, comprise radio circuit, low-frequency channel, it is characterized in that: described radio circuit comprises that 26M crystal oscillator match circuit, 433M whip antenna, CC1101 radio frequency integrated chip, 433M frequency range balun circuit, 50mW power amplifier, 433M frequency range receive low-pass filter circuit, the 433M frequency range sends low-pass filter circuit; Described 26M crystal oscillator match circuit links to each other with CC1101 radio frequency integrated chip, described CC1101 radio frequency integrated chip links to each other with the end of low-frequency channel with 433M frequency range balun circuit, the other end of 433M frequency range balun circuit links to each other with the end that the 433M frequency range receives low-pass filter circuit, the other end that the 433M frequency range receives low-pass filter circuit links to each other with the 433M whip antenna, 433M frequency range balun circuit links to each other with the end that the 433M frequency range sends low-pass filter circuit by the 50mW power amplifier, and the other end that the 433M frequency range sends low-pass filter circuit links to each other with the 433M whip antenna; Described low-frequency channel comprises power supply, interface, and described power supply links to each other with interface, radio circuit.

2. a kind of 433M 50mW wireless transceiver according to claim 1, it is characterized in that: described interface is 2.0 single pin x9,2.0 single pin x5, described 2.0 single pin x9,2.0 single pin x5 link to each other with CC1101 radio frequency integrated chip, and 2.0 single pin x9 also link to each other with power supply.

3. a kind of 433M 50mW wireless transceiver according to claim 1, it is characterized in that: described power supply comprises LDO circuit, decoupling circuit, one end of described LDO circuit links to each other with microcontroller, and the other end of LDO circuit links to each other with CC1101 radio frequency integrated chip by decoupling circuit.

4. a kind of 433M 50mW wireless transceiver according to claim 1, it is characterized in that: be provided with radome at described radio circuit, radome surrounds whole radio circuit.