Antenna within the projection area complete paving, and do not arrange the antenna side components, especially motors, SPEAKER, RECEIVER, FPC cable, LDO and other large metal structure of the low-frequency driver components and devices. Their electrical performance of the antenna have a significant negative impact the proposed design is generally in the top left or top right; 4 ~ 5mm spacing in between. Antenna from the plastic bracket and metal (radiator) composition.
MONOPOLE monopole antenna design environment such as the required structure, electrical properties can reach a higher level. The disadvantage is higher SAR. Not apply to folding, slide machine, ultra-thin candy bar in the candy bar machine and machine has an advantage. Antenna can not have a floor projection area, or non-PCB, while not arrange motor, SPEAKER, RECEIVER and other large metal structure components. Because the electrical properties of monopole antenna particularly sensitive to metal, or even impossible. Different way with PIFA. General recommendations on the four corners of the antenna design. Facade with the Ministry of PIFA days (thickness), and with the metal wire forming, such as the MOTO V3, V8 thin line, cell phone jammer, antenna design for their large empty area of the metal, in fact, part of which is part of the antenna. Domestic generic failure is not an empty area to the metal. This form of environmental design and antenna design are difficult, the need to choose carefully. The other is called "false built-in" form, which is equivalent to an external antenna to the machine, the volume is very small, with a PCB or ceramic material. This antenna bandwidth, poor radiation performance, high cost, not recommended. The same line, there is scaffolding, attached configuration. The director answered the customer’s questions about the data on the drawing of Cellular Phone Jammer.
Briefly compare the two mainstream law and MONOPOLE PIFA skin monopole antenna, and structural models were applied: PCB type MONOPOLE monopole antenna radiator using PCB board, and feed the motherboard has reed and PIN, thermal melting in the plastic bracket. Can also be positioned in the chassis hooks to do the installation. In many cases, cell phone design company as a model of the antenna performance is not a standard, the company was forced to replace the antenna, the results are unsatisfactory, the process of project delays. The manager is introducing mobile phone jammer with the help of the slide.
