CN201821343U

CN201821343U - 470M 10mW wireless transceiver

Info

Publication number: CN201821343U
Application number: CN201020273388XU
Authority: CN
Inventors: 贾灵; 王薪宇; 汪红良; 郑淑军; 顾航; 刘福芹
Original assignee: Zhejiang Xianxin Science & Technology Co Ltd
Current assignee: Zhejiang Xianxin Science & Technology 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 470M 10mW wireless transceiver which aims at solving the problems that a plurality modules are used, the circuit is complex, the price is high and the performance is hard to ensure in the prior art. The 470M 10mW wireless transceiver comprises a radio frequency circuit and a low-frequency circuit, the radio frequency circuit comprises a 26M crystal oscillator matching circuit, a 470M helical antenna, a CC1100E radio frequency integrated chip, a 470M frequency range Balun circuit and a 470M frequency range low-pass filtering circuit; the low-frequency circuit comprises a power supply and an interface which are connected and are respectively connected with a radio frequency circuit. In the utility model, by adopting the CC1100E 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 470M 10mW 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 10mW 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 26M crystal oscillator match circuit, 470M helical antenna, CC1100E radio frequency integrated chip, 470M frequency range balun circuit, 470M frequency range low-pass filter circuit; Described 26M crystal oscillator match circuit links to each other with CC1100E radio frequency integrated chip, described CC1100E radio frequency integrated chip links to each other with the end of low-frequency channel with 470M frequency range balun circuit, the other end of 470M frequency range balun circuit links to each other with an end of 470M frequency range low-pass filter circuit, and the other end of 470M frequency range low-pass filter circuit links to each other with the 470M helical antenna; Described low-frequency channel comprises power supply, interface, and described power supply links to each other with interface and links to each other with radio circuit respectively.When sending data, the data that the user will need to send send to wireless transceiver with the SPI form, transceiver passes through 2-FSK with digital signal, GFSK, OOK, be loaded on the 470M frequency range after the modulation of debud modes such as MSK, finally signal is sent with form of electromagnetic wave by front end match circuits such as 470M eight human relations circuit and 470M low-pass filter circuits by spring, 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 CC1100E, 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 470 ~ 480MHz, and transmitting power is 10MW, emission current≤40mA, received current≤23mA, sleep current≤2uA; Can be for a long time under 2.0 ~ 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 x8,2.0 single pin x2, and described 2.0 single pin x8,2.0 single pin x2 link to each other with CC1100E radio frequency integrated chip.2.0 single pin x8 is used for to wireless module power supply, output transmission, State Control; 2.0 single pin x2 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, 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 CC1100E radio frequency integrated chip, simplified entire circuit, reduced cost, reduced power consumption, dwindled overall dimension, improved transmission performance, reliable transmission is apart from 250m.

Description of drawings

Fig. 1 is that a kind of circuit of the utility model 470M 10mW wireless transceiver connects block diagram.

Among the figure: 1. 470M helical antenna, 2. 470M frequency range low-pass filter circuit, 3. 470M frequency range balun circuit, 4. CC1100E radio frequency integrated chip, 5. 2.0 single pin x2,6. 26M crystal oscillator match circuit, 7. power supply, 8. 2.0 single pin x8.

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 470M 10mW wireless transceiver of present embodiment, referring to Fig. 1, comprise radio circuit and low-frequency channel, radio circuit comprises 26M crystal oscillator match circuit 6,470M helical antenna 1, CC1100E radio frequency integrated chip 4,470M frequency range balun circuit 3,470M frequency range low-pass filter circuit 2, and low-frequency channel comprises power supply 7,2.0 single pin x8 8,2.0 single pin x2 5; Power supply 7 links to each other with 2.0 single pin x8 8 and CC1100E radio frequency integrated chip 4, and 2.0 single pin x8 8 link to each other with CC1100E radio frequency integrated chip 4; CC1100E radio frequency integrated chip 4 is connected with 26M crystal oscillator match circuit 6,470M frequency range balun circuit 3, power supply 7,2.0 single pin x2 5 as the core of radio circuit, and 470M frequency range balun circuit 3 links to each other with 470M helical antenna 1 by 470M frequency range low-pass filter circuit 2.

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 470M 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 470 ~ 480MHz, and transmitting power is 10MW, emission current≤40mA, received current≤23mA, sleep current≤2uA; Can normal for a long time steady operation under 2.0 ~ 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. 470M 10mW wireless transceiver, comprise radio circuit, low-frequency channel, it is characterized in that: described radio circuit comprises 26M crystal oscillator match circuit, 470M helical antenna, CC1100E radio frequency integrated chip, 470M frequency range balun circuit, 470M frequency range low-pass filter circuit; Described 26M crystal oscillator match circuit links to each other with CC1100E radio frequency integrated chip, described CC1100E radio frequency integrated chip links to each other with the end of low-frequency channel with 470M frequency range balun circuit, the other end of 470M frequency range balun circuit links to each other with an end of 470M frequency range low-pass filter circuit, and the other end of 470M frequency range low-pass filter circuit links to each other with the 470M helical antenna; Described low-frequency channel comprises power supply, interface, and described power supply links to each other with interface and links to each other with radio circuit respectively.

2. a kind of 470M 10mW wireless transceiver according to claim 1 is characterized in that: described interface is 2.0 single pin x8,2.0 single pin x2, and described 2.0 single pin x8,2.0 single pin x2 link to each other with CC1100E radio frequency integrated chip.

3. a kind of 470M 10mW wireless transceiver according to claim 1 and 2, it is characterized in that: be provided with radome at described radio circuit, radome surrounds whole radio circuit.