开发工具让设计师检查单元件的芯片为无线设计

开发工具让设计师检查单元件的芯片为无线设计 　　你是否需要检查出一个新的嵌入式天线、天线开关、射频功率放大器、或更复杂的放大器，评估板和开发从组件供应商包提供一个快速和低成本的方式来评估各种选项或创建解决方案的证据之前，一个完整的设计。选择的范围也可以满足预算紧缩的要求，从而使开发成本尽可能低。通过评估板，您可以实现一个完整的无线系统信号链，从天线到收发器，甚至将该子系统链接到主机系统。 　　低成本的评估板通常是相当小的子系统，通常是安装有元件的小型电路板和电源和信号输入和输出的几个连接器。一些板还包括一个小的原型区域，允许设计者定制他们的解决方案。这对于开发板上更复杂的电路尤其适用。这样的面板倾向于提供多种选择，使设计者在开发解决方案时具有很大的灵活性。 　　 　　Let us look at some of the evaluaTIon/development kit opTIons for the wireless signal path from the antenna to the transceiver. Even simple passive devices such as embeddable antennas deserve evaluaTIon boards to better determine how the antenna might react in the system in which it will be used. Antenova， Ethertronics， Laird， Pulse Finland， and Taoglas all offer simple development board for their antennas. TheMica 2.4 GHz SMD antenna from Antenova targets Bluetooth， Wi-Fi， and ZigBee， as well as WiMAX at 2.3 and 2.5 GHz and WiBro. A simple evaluaTIon board with proper ground plane under the antenna lets the antenna deliver an optimum radiation pattern （Figure 1a）。 Ethertronics offers several evaluation options， the Savvi is an embedded ceramic antenna targeted at wireless LANs for 802.11a/b/g applications in the 2.4 to 2.5 and 4.9 to 5.8 GHz bands （Figure 1b， left）， while the Prestta is a standard penta-band embedded antenna for cellular systems on frequency bands of 850/9001800/1900/2100 MHz （Figure 1b， right）。 Both evaluation boards are simple designs just consisting of the antenna mounted on a ground plane and a small RF connector to connect to the rest of the system. Both antennas use the company’s isolated magnetic-dipole technology that helps keep the antenna size small and minimizes detuning regardless of the usage position.