開發工具讓設計師檢查單元件的芯片為無線設計

　　你是否需要檢查出一個新的嵌入式天線、天線開關、射頻功率放大器、或更復雜的放大器，評估板和開發從組件供應商包提供一個快速和低成本的方式來評估各種選項或創建解決方案的證據之前，一個完整的設計。選擇的范圍也可以滿足預算緊縮的要求，從而使開發成本盡可能低。通過評估板，您可以實現一個完整的無線系統信號鏈，從天線到收發器，甚至將該子系統鏈接到主機系統。

　　低成本的評估板通常是相當小的子系統，通常是安裝有元件的小型電路板和電源和信號輸入和輸出的幾個連接器。一些板還包括一個小的原型區域，允許設計者定制他們的解決方案。這對于開發板上更復雜的電路尤其適用。這樣的面板傾向于提供多種選擇，使設計者在開發解決方案時具有很大的靈活性。

　　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.