1.4 - 7.1 GHz Positive Gain Slope Amplifier +2dB

CMX90G302

www.cmlmicro.com

Page 13

D/90G302/3 September 2022

The PCB consists of a top layer of R04350 backed by 2 layers of FR-4 with a total thickness of 1.606 mm (Figure 32) and

the EV90G302 PCB (Figure 33) is 20 mm x 45 mm. The coplanar RF transmission lines have a width of 0.525 mm with a

gap of 0.27 mm to ground either side. The through line length has been reduced by 3mm to account for the length of

the device.

Figure 32: EV90G302 Layer Stack

Figure 33: EV90G302 PCB Top Layer View

FR4

Solder Mask

0.056

bottom layer

0.033

ground plane

0.254

0.894

strength

FR4

RO4350 (εr = 3.66)

0.035

ground plane

0.254

0.040

top layer

Solder Mask

0.020

solder mask

0.020

solder mask