Abstract
We present a multichip scalable phased array based on nearest-neighbor phase self-alignment. The proposed scheme relies on mm-wave interferometric phase detection and baseband phase adjustment forming a distributed phase control scheme. We introduce the architecture and develop a proof of concept array where the chips are fabricated in the TSMC 65 nm process. We form the multichip array by implementing mm-wave chip-to-chip interconnects for phase control with an on-board antenna array. Over-the-air measured patterns produce reliable inter-element phase values resulting in calibration-free beam steering for up to <inline-formula> <tex-math notation="LaTeX">$1\ttimes 7$</tex-math> </inline-formula> radiating elements. The measured <inline-formula> <tex-math notation="LaTeX">$\pm30^{\circ}$</tex-math> </inline-formula> beam steering and steps across <inline-formula> <tex-math notation="LaTeX">$27.4$</tex-math> </inline-formula>–<inline-formula> <tex-math notation="LaTeX">$32.4$</tex-math> </inline-formula> GHz are consistent with predictions from simulation, demonstrating a novel distributed method to produce large-scale coherent beamforming arrays.
Original language | English (US) |
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Pages (from-to) | 1-4 |
Number of pages | 4 |
Journal | IEEE Microwave and Wireless Technology Letters |
DOIs | |
State | Accepted/In press - 2024 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:IEEE
Keywords
- Antenna measurements
- Beam steering
- Integrated circuits
- multichip
- Phase measurement
- Phased arrays
- phased arrays
- scalable
- Solid state circuits
- Transmission line measurements
- Transmitters