Mobile phone antenna entry

Mobile phone antennas can be divided into PIFA antennas and Single Pole antennas. As debugging becomes more difficult, a new IFA antenna is added. PIFA AntennaPIFA antenna has the same requirements on antenna height and area. Generally, the dual-band height must be above 5mm. The proposed height of PIFA antenna must be above 7, although PIFA requires a large antenna space with an area of 500 square MM, PIFA has its own advantages over other antennas. 1. The antenna has good stability and the antenna area is properly controlled, the performance of the mobile phone will not change due to small differences. 2. The main area of the antenna (as high as possible) has strong anti-interference capability, and some metal devices are allowed near the antenna, mobile phone case allows metal Decoration (metal ring) 3, SAR value test is relatively better (less domestic water equipment test) Single Pole AntennaA single pole antenna, also known as monopole antenna, is a product generated after the PIFA antenna becomes smaller and smaller in the market, the spatial requirements of the antenna are much lower than those of the PIFA antenna, mainly depending on the clearance position of the motherboard design (the distance from the PCB edge to the hollow edge or the distance from the hollow to the antenna ), in general, dual-band antennas require the antenna clearance to be greater than 4mm, and the area greater than 260 square MM is relatively higher. The antenna clearance must be greater than 6mm, and the area greater than 300 square MM is 1 compared with that of PIFA antennas, the single pole antenna is more suitable for the current increasingly small cell phone ID design, a small space to design a mobile phone antenna to meet performance requirements. 2. The single pole antenna is greatly affected by peripheral metal devices and metal decoration. It is required that there should be no large metal devices near the antenna, such as SPK, CAMRE, motor, TV tie rod, etc, the front shell metal ring has a great impact on the antenna. The main area of the antenna must be as far away as possible from the metal. IFA AntennaThe IFA antenna can be seen as a derivative of monopole antenna. Generally, when the height and area are difficult to meet the PIFA antenna requirements, and the air clearance around the antenna is not very good, it can be obtained according to the specific situation. Compared with the PIFA antenna, the IFA antenna is generally used in the bracket slope and side (the PIFA antenna is generally used in the bracket plane). Compared with the pole antenna, the IFA antenna uses both legs (one feed point, 1 location), the area used is roughly the same as that of the routing method.