The advantages and disadvantages of the flat antenna of the GPS vehicle positioning terminal

　　The flat antenna of the GPS vehicle positioning terminal has the one with durable, simple production, and the most widely used car terminal antenna. The flat antennas are round, square or rectangular, like a copper printing circuit board. Because the antenna is composed of one or more metal pieces, the most common shape of the GPS vehicle positioning terminal antenna is block knot.

　　The size of the GPS vehicle positioning terminal antenna is very small, so it is very suitable for aviation applications and personal handheld applications. Another important feature of the GPS vehicle positioning terminal antenna is its gain graphic, that is, directionality. The direction of the GPS vehicle positioning terminal antenna can improve its anti -multi -diameter effect ability and anti -interference ability.

　　In accurate positioning, the stability of the phase center of the GPS vehicle positioning terminal antenna is an important indicator. However, in ordinary navigation applications, people want to use the full -direction of the GPS vehicle positioning terminal antenna. At least the GPS vehicle positioning terminal antenna can be received. When the positioning terminal antenna is directly above, the signal gain is the largest. This disadvantage is also highlighted. The receiving range of the tablet is above the tablet, and the tablet must be facing the sky. This opponent and the car are troublesome. Although the satellite signal on top of the head is better and easier to lock, the satellite on the top of the head is the most useless. If there is no low -angle satellite, the error will be relatively large and the accuracy will be poor.

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