Design Note DN033
Description of the Antenna Design
The antenna solution implemented on the CC1101-Q1 EM consists of a chip antenna from Mitsubishi Materials Corporation. For detailed information about this chip antenna, please refer to .
A matching network is used to adjust impedance and ensure optimum performance at the desired frequency.
The performance of the antenna is affected by dimensions and layout of the PCB on which it is implemented due to their influence on the impedance of the antenna. Especially the area and dimensions of ground plane and its distance to the antenna affect the performance of the antenna remarkably.
Implementation of the Antenna
It is important to make an exact copy of the PCB pattern to obtain optimum antenna performance on the CC1101-Q1 EM. Figure 4 and Table 1 show the dimensions of the PCB pattern of the CC1101-Q1 EM. A double-sided FR4 substrate with 1 mm thickness is being used for this module. The thickness of the PCB will have little effect on the performance of the antenna. However, the value of the matching components should be changed with the thickness. The antenna has also been implemented onto the CC-Antenna-DK and this ref design is based upon 1.6mm thick PCB and a larger GND plane .
Figure 4: Antenna Dimensions
L1 39 mm
L6 3 mm
Table 1. Antenna Dimensions
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