**6.2 Platform noise isolation**

204 Wireless Communications and Networks – Recent Advances

LTE 7 bands Antenna SWR

Fig. 33. VSWR of each measuring port before noise measurement for LTE band.

1459

1648.75

Frequency(Hz)

1838.5

2028.25

2218

2407.75

Antenna SWR

2597.5

2787.25

2977

700

889.75

1079.5

1269.25

Fig. 34. LCD panel testing fixture integrated with LNA and SNA result for LTE.

Fig. 35. LCD panel testing fixture with LNA and antenna protected by dielectric material.

TP and camera are not the only modules resulting in the platform noise problem, but the product's assembly construction such as antenna and its mini-coaxial cable routing, TP and its LVDS cable, camera and its USB cable will also bring up noise problem. We can utilize some design techniques, like component placement and orientation, cable routing, shielding etc. to improve platform noise isolation.
