high-performance non-reciprocal device on a compact chip with a performance 25 times better than previous work tagged posts

‘One-Way’ Electronic Devices enter the Mainstream

Microphotograph of the Columbia Engineering single-chip circulator with watt-level power handling.

Engineers are the first to build a high-performance non-reciprocal device on a compact chip with a performance 25 times better than previous work. The new chip, which can handle several watts of power (enough for cellphone transmitters that put out a watt or so of power), was the leading performer in a DARPA SPAR program to miniaturize these devices and improve performance metrics.

Waves, whether they are light waves, sound waves, or any other kind, travel in the same manner in forward and reverse directions — this is known as the principle of reciprocity...

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