實(shí)現(xiàn)射頻性能和批準(zhǔn)

　　天線設(shè)計(jì)似乎和科學(xué)一樣重要，但是通過遵循一些簡(jiǎn)單的設(shè)計(jì)規(guī)則，你就可以可靠地達(dá)到你的性能和批準(zhǔn)目標(biāo)。

　　在選擇天線或天線設(shè)計(jì)并確定無線產(chǎn)品的機(jī)械規(guī)格之前，產(chǎn)品設(shè)計(jì)者必須清楚地了解產(chǎn)品必須達(dá)到的RF性能指標(biāo)，以便：

　　在市場(chǎng)上取得良好的RF性能，確保市場(chǎng)的成功和

　　通過所有的監(jiān)管和運(yùn)營(yíng)商的批準(zhǔn)。

　　性能

　　基本概念-色氨酸，TIS和RSE

　　對(duì)于諸如GSM或CDMA這樣的蜂窩應(yīng)用，基本射頻性能是根據(jù)能夠在網(wǎng)絡(luò)上可靠地傳輸和接收的產(chǎn)品來衡量的。測(cè)量性能的科學(xué)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.