原标题：Microchip MRF24J40MC ZENA无线适配器解决方案

　　microchip公司的MRF24J40MC是和2.4 GHz IEEE Std. 802.15.4™兼容的表面安装的模块,集成了晶体,电压稳压器,匹配电路,功率放大器(PA) 和低噪音放大器(LNA)以及50欧姆外接天线连接器.而ZENA™无线适配器是多功能USB无线适配器,可连接装备了USB的台式电脑或笔记本电脑,或作为网络应用的无线节点,也可用作协议分析器或诊断工具.本文介绍了MRF24J40MC无线模块的主要特性,框图, PA/LNA方框图和应用电路与材料清单,PCB布局图以及三种不同频率的ZENA™无线适配器的电路图,材料清单.

　　The ZENA Wireless Adapter is a multi-function USB wireless adapter connecting USB-equipped desktop or notebook computers with Microchip wireless products for development or application uses. As a development tool, the ZENA Wireless Adapter can be used as a protocol analyzer or as a diagnostic tool. It can also be used to connect the computer as a wireless node to the network for application uses. The ZENA Wireless Adapter is capable of performing a variety of functions and each function can be programmed into the adapter using the built in USB boot loader.

　　MRF24J40: 2.4 GHz IEEE Std. 802.15.4™ RF Transceiver Module with PA/LNA and External Antenna Connector

　　The MRF24J40MC is a 2.4 GHz IEEE Std. 802.15.4™ compliant, surface mount module with integrated crystal, internal voltage regulator, matching circuitry, Power Amplifier (PA), Low Noise Amplifier (LNA) with 50Ω external antenna connector. The MRF24J40MC module operates in the non-licensed 2.4 GHz frequency band. The integrated module design frees the integrator from extensive RF and antenna design, and regulatory compliance testing allowing quicker time to market. The MRF24J40MC module is compatible with Microchip’s ZigBee®, and MiWi™ Development Environment software stacks.

　　The MRF24J40MC module has received regulatory approvals for modular devices in the United States (FCC) and Canada (IC). Modular approval removes the need for expensive RF and antenna design, and allows the end user to place the MRF24J40MC module inside a finished product and does not require regulatory testing for an intentional radiator (RF transmitter).

　　The MRF24J40MC module has been tested and conforms to ETS EN 300 328 V1.7.1 (2006-10) European Standards. The module tests can be applied toward final product certification and Declaration of Conformity (DoC).

　　图1. MRF24J40MC模块方框图

　　图2. MRF24J40MC模块PA/LNA方框图

　　图3. MRF24J40MC模块应用电路

　　图4. MRF24J40MC模块电路图

　　MRF24J40MC模块材料清单:

　　图5. MRF24J40MC模块PCB元件布局图:顶层

　　ZENA™无线适配器

　　The ZENA Wireless Adapter is a multi-function USB wireless adapter connecting USB-equipped desktop or notebook computers with Microchip wireless products for development or application uses. As a development tool, the ZENA Wireless Adapter can be used as a protocol analyzer or as a diagnostic tool. It can also be used to connect the computer as a wireless node to the network for application uses. The ZENA Wireless Adapter is capable of performing a variety of functions and each function can be programmed into the adapter using the built in USB boot loader.

　　ZENA™无线适配器一揽表:

　　图6.ZENA™无线适配器外形图

　　ZENA™无线适配器材料清单: