The delay per unit inch on the PCB is 0.167ns. However, if there are more vias, more device pins, and more constraints set on the network cable, the delay will increase. Generally, the signal rise time of high-speed logic devices is about 0.2ns. If there are GaAs chips on the board, the maximum wiring length is 7.62mm. The following is about RO3003 PCB related, I hope to help you better understand RO3003 PCB.
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