A 0.53-THz Subharmonic Injection-Locked Phased Array With 63- $\mu$ W Radiated Power in 40-nm CMOS.
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| Title: | A 0.53-THz Subharmonic Injection-Locked Phased Array With 63- $\mu$ W Radiated Power in 40-nm CMOS. |
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| Authors: | Guo, Kaizhe, Zhang, Yang, Reynaert, Patrick |
| Source: | IEEE Journal of Solid-State Circuits. Feb2019, Vol. 54 Issue 2, p380-391. 12p. |
| Subjects: | Subharmonic functions, Injection locked oscillators, Phased array antennas |
| Abstract: | This paper presents a 0.53-THz subharmonic injection-locked $1\times 4$ phased array based on an injection-locked oscillator (ILO) chain. Thanks to the ILO chain, the phase errors in the phased array can be compensated without introducing power variation. This technique enables accurate beam steering with a 60° scan range in the $E$ -plane at 0.53 THz. A six-stage triple-push oscillator is proposed to generate the signal at 0.53 THz. Compared with a conventional triple-push oscillator, it reduces layout constraints, improves signal balance, and enhances output power by at least 3 dB. The phased array is implemented in 40-nm CMOS. With an injection power of 0 dBm, the injection-locked phased array generates an output frequency from 529 to 534 GHz. At 531.5 GHz, the proposed phased array achieves −12-dBm radiated power and 0.24‰ dc-to-terahertz (THz) efficiency without the use of silicon lens, quartz superstrate, or substrate thinning. The chip consumes 260-mW dc power and occupies an area of 2.5 mm2. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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