Miniature Tracker
Why Unictron ?
Embedded antennas are often used in Tracker to receive GNSS data or transmit location information to the server. There are a lot of different materials and processes that can be used for the production of antennas, the major types of embedded antennas include LDS antennas, FPC antennas and chip antennas. Regarding design methodology, the major embedded antennas are normally PIFA or monopole antennas.
The major concerns of embedded antenna applications are as follows.
- Antenna performance impact when the human body is too close
- The trade-off of antenna size and performance
- The consideration between radiation patterns and total radiation efficiency
- Custom-made antenna is required for each new model
- Total cost
Compared to other type of antennas, Unictron’s patented TELA chip antennas provide the best solution to the above issues.
1. Antenna performance impact when the human body is too close
The reactive near field of an antenna consists of electric fields and magnetic fields. The human body is a dielectric material, and has more effect on the electric field portion of the reactive near field. This could affect the feed-in impedance of the antenna. When a person is near an antenna or holding a tracker, the antenna performance will be impacted more if the electric field is stronger. On the other hand, TELA chip antenna utilizes improved loop antenna design methodology, in which the magnetic field portion is predominant, and thus decreases the impact of the human body on the antenna’s reactive near field, thus causing less impact on the overall performance of the antenna.
2. The trade-off of antenna size and performance
TELA chip antenna uses the metal on the both sides of the antenna for radiation. Although the size of a chip antenna is very small, the radiation efficiency can stay very high if the metal length at both sides is long enough. For example, PIFA ( LDS, FPC) will have better radiation efficiency if the length of the antenna meets 1/4λ criteria and the antenna remains far away from metal object. For modern Tracker, the trend of the product design is thinner. When PIFA is close to the main board, the efficiency of the antenna will drop tremendously if the metal layers on the main board right under the antenna are not empty. However, TELA chip antenna covers the above problems by not only shrinking the size of the antenna to 3.2×1.6×0.5(mm) but also maintaining high radiation efficiency. Thanks to our innovative designs, TELA chip antennas are used in Tier 1 companies as the standard antenna choice for their products.
Featured products:
TELA® : AA701, AA702, AA055U, AA088U, CW201
