A 60-GHz 10-Gb/s OOK Modulator with Transformer-Feedback Technique for High Gain and On-Off Isolation in 90-nm CMOS

A 60-GHz on-off keying (OOK) modulator with transformer-feedback technique for high output power, gain, and on-off isolation performances is presented. Based on a cascode structure, the modulator combines the function of modulation and output amplification of an OOK transmitter. By adopting transformer feedback technique, the modulator achieves an OP _1dB of 7.0dBm, gain of 10.2dB, and on-off isolation of 45.4dB at 60-GHz. For OOK modulation, data rates of up to 10-Gb/s were measured. The modulator is designed and realized in 90-nm CMOS process with a die size measured at 471 × 519μm ² with RF and DC pads included.