All radiation measurements are done on a TIDA-01632 PCB without any absorbing material or copper foil attached. The CC2640R2F-Q1 device on the TIDA-01632 is configured to output a constant wave at 2440 MHz with 0 dBm. The measured total radiated power (TRP) is –8.71 dBm and –8.97 dBm giving an antenna efficiency of around 14% (0.3 dB loss in the RF switch - SKYA21001). In the following measurements, the z-axis is perpendicular to the PCB, with the x-axis as the height and the y-axis as the length shown in Figure 3-16.

Figure 3-16 PCB Orientation for TRP Results

In the total radiated power plots, Theta represents the rotation of the PCB from the z-axis to the y-axis (turntable base rotating) and Phi represents the z-axis to the x-axis (rotating the arm from Figure 3-14).

Figure 3-17 Antenna 1 TRP

Figure 3-18 Antenna 2 TRP

Figure 3-19 Antenna 1 TRP (Theta = 0, Phi = 0)

Figure 3-20 Antenna 2 TRP (Theta = 0, Phi = 0)

Figure 3-21 Antenna 1 TRP (Theta = 180, Phi = 0)

Figure 3-22 Antenna 2 TRP (Theta = 180, Phi = 0)

Figure 3-23 Antenna 1 TRP (Theta = 90, Phi = 0)

Figure 3-24 Antenna 2 TRP (Theta = 90, Phi = 0)

Figure 3-25 Antenna 1 TRP (Theta = 90, Phi = 180)

Figure 3-26 Antenna 2 TRP (Theta = 90, Phi = 180)

Figure 3-27 Antenna 1 TRP (Theta = 90, Phi = 270)

Figure 3-28 Antenna 2 TRP (Theta = 90, Phi = 270)

Figure 3-29 Antenna 1 TRP (Theta = 90, Phi = 90)

Figure 3-30 Antenna 2 TRP (Theta = 90, Phi = 90)

The TRP was also measured with the TIDA-01632 PCB mounted on a metal stand with RF absorbing material (WaveX WX-A-010-12P) and tin plated copper foil (3M 1183) attached between the PCB and the metal stand shown in Figure 3-31. The added metal around the antenna drastically degrades the efficiency but ensures that no RF signals are received from the back side of the PCB. A measured TRP of around –23 dBm indicates an antenna efficiency of just 0.5%.

Figure 3-31 PCB + RF Absorbing Material + Tin-Platted Copper Foil + Metal Stand

Figure 3-32 PCB + RF Absorbing Material + Tin-Platted Copper Foil + Metal Antenna 1 TRP

Figure 3-33 PCB + RF Absorbing Material + Tin-Platted Copper Foil + Metal Antenna 2 TRP