實現射頻性能和批準

　　天線設計似乎和科學一樣重要，但是通過遵循一些簡單的設計規則，你就可以可靠地達到你的性能和批準目標。

　　在選擇天線或天線設計并確定無線產品的機械規格之前，產品設計者必須清楚地了解產品必須達到的RF性能指標，以便：

　　在市場上取得良好的RF性能，確保市場的成功和

　　通過所有的監管和運營商的批準。

　　性能

　　基本概念-色氨酸，TIS和RSE

　　對于諸如GSM或CDMA這樣的蜂窩應用，基本射頻性能是根據能夠在網絡上可靠地傳輸和接收的產品來衡量的。測量性能的科學方法是在消聲室。

　　The measurements numbers used are outlined below：

　　TRP – Total Radiated Power

　　This defines how much power is being radiated from the device and is measured in dBm. The higher this number， the better the device is able to transmit.

　　TIS – Total Isotropic Sensitivity

　　TIS – Total Isotropic Sensitivity This defines how low a signal the device can receive and demodulate. The lower this number （with a minus figure） the better the device can operate in weak signal environments.

　　RSE — Radiated Spurious Emissions

　　In practice this is the most difficult test for cellular products to pass， from Taoglas’ experience. These are radio waves output by the device which are above the power limit set by regulatory authorities to avoid interference. When a test confirms a radiated spurious emission over the limit either the device or the antenna must be modified to get it below the limit and thus pass certification. Otherwise the device cannot be sold in that country.