Characteristics and model selection of 3g internal antenna

　　Characteristics of 3g internal antenna

　　1. Relatively high gain, perfect process, good product delivery consistency, built-in equipment, beautiful, no need to do three-proof independently, greatly affected by the surrounding environment, generally need to be customized according to the product itself

　　2. Model selection of 3g internal antenna

　　The shape of 3g internal antenna can be divided into: FPC/PCB/spring/ceramic/metal spring sheet/laser direct forming technology (LDS) and other types.

　　At present, PCB antenna is generally selected. Spring LDS antenna is selected under the condition of high cost control and general performance requirements. General 3g internal antenna is affected by the environment and needs customized design or matching resistance.

　　FPC antenna: has good cost performance, can adapt to various shapes and colors after oil pump; product flexibility is good, can perfectly adapt to standard curved surface; perfect and stable process, fast production cycle, good mass delivery;

　　Suitable for wide-band smart product antenna design with high performance requirements

　　PCB antenna: The biggest difference from FPC antenna is that FPC antenna has good flexibility, while PCB antenna is a hard board.

　　In terms of structural installation, if you need to bend or curved, choose FPC antenna. If it is a flat surface, choose PCB antenna. PCB antenna is easier to install than FPC.

　　Spring antenna: Its biggest feature is low price, but low gain and wide bandwidth. When built into the product, it is usually necessary to adjust the antenna pairing.

　　Ceramic patch antenna: It takes up little space and has good performance; ceramic patch antenna has wide bandwidth and is difficult to achieve multi-frequency band;

　　It can effectively improve the integration of the motherboard and reduce the limitation of the antenna on the ID; it is necessary to improve the design at the beginning of the definition of the motherboard.

　　LDS antenna: Using antennas with special appearance, the antenna space can be flexibly used;

　　In order to achieve the performance of the antenna closer to the physical requirements of the environment, there are special material requirements for the shell or support frame to which the antenna is attached, the processing technology is perfect, and the paint color can be adjusted. There is a certain defect rate in the process.

　　Metal spring antenna: It has a high cost-effectiveness and reasonably controls costs; the product has high compressive strength and is not easy to damage.

　　The processing technology is perfect and stable, the production cycle is fast, and the metal spring wireless antenna has good mass delivery. It has certain limitations on the use of antenna areas and curved surfaces.