WiFi antenna requirements for PCB layout and structure

As market competition intensifies, hardware devices are developing in an integrated direction. Antennas have also evolved from external evolution to embedded, and we will first introduce the types of antennas for this type of application :

(1) On Board on-board type: integrated with PCB etching, limited performance, very low cost, applied to Bluetooth, WIFI module integration;

(2) SMT mount type: the material is ceramic, metal sheet, PCB, and the performance cost is moderate, suitable for large-scale embedded RF modules;

(3) IPX external type: using PCB or FPC + Cable combination, excellent performance, moderate cost, widely used in OTT, terminal equipment;

(4) External external category: plastic rod antenna, high performance, independence, high cost, applied to terminal equipment, no need to consider EMC and other issues;

External antennas are well known, so let's take a look at the space required for the three types of built-in antennas:

Let's summarize the space requirements and performance indicators:

The above is the antenna design reference of WIFI2.4G!

The ultimate goal of the antenna is to radiate the RF signal into free space. At this time, the antenna design is very important, but the antenna design depends largely on the characteristics of the installed platform. In addition, the antenna is sensitive to the surrounding environment. In many cases, the antenna is unique to each platform. Because the customer's consideration of the antenna design is not clear, here are some suggestions for our portable antenna design, so that customers can better design their own circuits and PCBs, increasing the chances of success. But each project has its own characteristics, so there are still some issues that require specific analysis of specific issues.