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Engineers Devise Two-Way Radio on a Single Chip

Associate professor Al Molnar and graduate student Hazal Yksel with a test board with the two-way transceiver chip mounted in the center.

Cornell University researchers have developed a way to use a single chip to both transmit and receive a radio signal.

Credit: Jason Koski/Cornell University Photography

Researchers at Cornell University say they have developed a method for transmitting and receiving a radio signal on a single chip, a breakthrough they say could help change the way wireless communication is accomplished.

The new technology involves a series of six subtransmitters all connected to an artificial transmission line. Each subtransmitter sends its signal at regular intervals, and their individually weighted outputs are programmed so they combine to produce a radio frequency signal in the forward direction, at the antenna port, while cancelling out at the receive port.

The researchers say this enables the simultaneous summation and cancellation to be tuned across a wide range of frequencies, and to adjust to signal strength at the antenna.

In addition, instead of requiring a filter for every band, signal separation can be controlled digitally.

They also note the subtransmitter concept will function over a range of frequencies.

From Cornell Chronicle
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