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 that the module be mounted on the edge of the host board and to have 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 4-1. PCB Antenna Specification for WBZ450 Module
Parameter	Specification
Operating frequency	2400 to 2480 MHz
Peak gain	4.14 dBi at 2440 MHz
Efficiency	50%

Table 4-2. PCB Antenna Specification for WBZ451 Module
Parameter	Specification
Operating frequency	2400 to 2480 MHz
Peak gain	2.36 dBi at 2420 MHz
Efficiency	50%

PCB Antenna Radiation Pattern

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

Figure 4-8. WBZ450 Antenna Radiation Pattern when Phi = 0°

Figure 4-9. WBZ450 Antenna Radiation Pattern when Phi = 90°

Figure 4-10. WBZ450 Antenna Radiation Pattern when Theta = 90°

Figure 4-11. WBZ451 Antenna Radiation Pattern when Phi = 0°

Figure 4-12. WBZ451 Antenna Radiation Pattern when Phi = 90°

Figure 4-13. WBZ451 Antenna Radiation Pattern when Theta = 90°