為什么是無線射頻模塊？

　　今天，無線連接正迅速成為許多應用程序的首選功能。切斷電線和動員設備的能力是吸引顧客的一大特點。對于勇敢的設計工程師來說，在新的或現(xiàn)有的產(chǎn)品中添加無線技術是一項艱巨的任務，本文討論的問題是“我應該設計它，還是應該購買一個現(xiàn)成的預先認證的模塊？”“讓我們看看選擇和后果的每個。

　　加入無線功能

　　無線通信涉及到電磁頻譜，具有許多獨特的性質(zhì)。無線電波按光譜的波長傳播。天線提供了與電波的阻抗匹配。市場上有很多無線設備的選擇。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.