為什么是無(wú)線射頻模塊？

　　今天，無(wú)線連接正迅速成為許多應(yīng)用程序的首選功能。切斷電線和動(dòng)員設(shè)備的能力是吸引顧客的一大特點(diǎn)。對(duì)于勇敢的設(shè)計(jì)工程師來(lái)說(shuō)，在新的或現(xiàn)有的產(chǎn)品中添加無(wú)線技術(shù)是一項(xiàng)艱巨的任務(wù)，本文討論的問(wèn)題是“我應(yīng)該設(shè)計(jì)它，還是應(yīng)該購(gòu)買(mǎi)一個(gè)現(xiàn)成的預(yù)先認(rèn)證的模塊？”“讓我們看看選擇和后果的每個(gè)。

　　加入無(wú)線功能

　　無(wú)線通信涉及到電磁頻譜，具有許多獨(dú)特的性質(zhì)。無(wú)線電波按光譜的波長(zhǎng)傳播。天線提供了與電波的阻抗匹配。市場(chǎng)上有很多無(wú)線設(shè)備的選擇。要使用的選擇取決于頻率、調(diào)制和數(shù)據(jù)編碼。

　　To design or not to design—that is the question. Is it better to design a solution or buy a ready-made， pre-certified module？ Wireless ICs range in price from $1 to $5 each， depending upon the quantity and complexity of the device. Design engineers evaluate total system cost—that is to say， all of the components surrounding the IC—if they decide to design a wireless solution themselves. Wireless modules provide a choice of a wireless solution and range in cost from $10 to $100 each， depending upon the quantity and complexity.

　　At first， the wireless module appears to cost more than the design solution. Let’s take a look at what is behind the system costs.