4.6.1 PCB Antenna

For the WBZ45 module, the PCB antenna is fabricated on the top copper layer and covered in a solder mask. The layers below the antenna do not have copper trace. It is recommended to mount the module on the edge of the host board. Ensure there is no PCB material below the antenna structure of the module and no copper traces or planes on the host board in that area.

The following table lists the technical specification of the PCB antenna when tested with the WBZ45 module mounted on an evaluation board.

Table 4-2. PCB Antenna Specification for WBZ450 Module
ParameterSpecification
Operating frequency2400 to 2480 MHz
Peak gain4.14 dBi at 2440 MHz
Efficiency50%
Table 4-3. PCB Antenna Specification for WBZ451 Module
ParameterSpecification
Operating frequency2400 to 2480 MHz
Peak gain2.36 dBi at 2420 MHz
Efficiency50%
Table 4-4. PCB Antenna Specification for WBZ451H Module
ParameterSpecification
Operating frequency2400 to 2480 MHz
Peak gain4.08 dBi at 2440 MHz
Efficiency57%

PCB Antenna Radiation Pattern

The following figures illustrate the antenna radiation patterns for WBZ450 and WBZ451 modules.

Figure 4-13. WBZ450 Antenna Radiation Pattern when Phi = 0°
Figure 4-14. WBZ450 Antenna Radiation Pattern when Phi = 90°
Figure 4-15. WBZ450 Antenna Radiation Pattern when Theta = 90°
Figure 4-16. WBZ451 Antenna Radiation Pattern when Phi = 0°
Figure 4-17. WBZ451 Antenna Radiation Pattern when Phi = 90°
Figure 4-18. WBZ451 Antenna Radiation Pattern when Theta = 90°
Figure 4-19. WBZ451H Antenna Radiation Pattern when Phi = 0°
Figure 4-20. WBZ451H Antenna Radiation Pattern when Phi = 90°
Figure 4-21. WBZ451H Antenna Radiation Pattern when Theta = 90°