The built-in antenna is a design that encapsulates the antenna inside the device, which can reduce the external size of the device, beautiful and simple, and is suitable for some products with high appearance requirements. Built in antennas are widely used in many fields. The following are some common fields:

1. Mobile communication equipment: Mobile communication equipment such as smart phones and tablets usually use built-in antenna design to provide wireless communication functions, such as GSM, LTE, WiFi, etc.

2. Smart wearable devices: Smart watches, sports bracelets and other smart wearable devices usually also use the built-in antenna design, which can realize Bluetooth, GPS and other functions.

3. Household appliances: products such as smart home devices, routers, smart TVs, etc. often use built-in antennas to simplify the appearance of products and improve the aesthetic.

4. Automotive field: Some on-board equipment in automobiles, such as on-board navigation system, on-board communication equipment, etc., often use the built-in antenna design to facilitate installation and reduce aerodynamic resistance.

5. Industrial control system: some industrial control equipment and machine equipment also use built-in antennas for wireless data transmission, remote monitoring and other functions.

6. Medical equipment: some medical equipment will also use built-in antenna to realize wireless communication or data transmission between medical equipment.

Built in antennas are widely used in electronic products in various fields, especially in products that require high appearance and wireless communication functions. With the continuous development of technology, the built-in antenna will be applied in more fields, and its performance and stability will be continuously improved.