Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
?
EE Times-Asia > RF/Microwave
?
?
RF/Microwave??

NEC nitride power transistor delivers 2.3W output

Posted: 20 Dec 2002 ?? ?Print Version ?Bookmark and Share

Keywords:nec? nitride power transistor? rf transistor?

NEC Corp. has developed a nitride semiconductor power transistor capable of 2.3W power amplification in the sub-millimeter band (30GHz) - almost thrice the output power of previous chip - and is expected to substantially contribute to the development of wireless communications.

The transistor provides watt-grade power amplification without the need for the power divider/combiner that conventionally generated larger chip sizes and increased power loss. This results to a size 80 percent smaller than previous devices but can still cover the 22GHz, 26GHz, and 38GHz HF bands.

The device employs 0.25?m ultra-fine gate electrodes using an electron beam lithography and heterojunctions of GaN and AlGaN to realize a power gain cutoff frequency of 120GHz, drain current density of up to 1A per 1mm-wide gate. It also adopts a silicon carbide substrate to allow parallel transistor elements to be operated at the same channel temperature.

NEC achieved a maximum output power of 2.3W (continuous wave operation) at an input frequency of 30GHz when a 30V bias voltage is applied to chip with a total gate width of 0.36mm.





Article Comments - NEC nitride power transistor deliver...
Comments:??
*? You can enter [0] more charecters.
*Verify code:
?
?
Webinars

Seminars

Visit Asia Webinars to learn about the latest in technology and get practical design tips.

?
?
Back to Top