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Title: A 0.31THz CMOS Uniform Circular Antenna Array Enabling Generation/Detection of Waves with Orbital-Angular Momentum
This paper reports the first chip-based demonstration (at any frequency) of a CMOS front-end that generates and receives electromagnetic waves with rotating wave phase front (namely orbital angular momentum or OAM). The chip, based on a uniform circularly placed patch antenna array at 0.31THz, transmits reconfigurable OAM modes, which are digitally switched among the m=0 (plane wave), +1 (left-handed), −1 (right-handed) and superposition (+1)+(-1) states. The chip is also reconfigurable into a receiver mode that identifies different OAM modes with >10dB rejection of unintended modes. The array, driven by only one active path, has a measured EIRP of −4.8dBm and consumes 154mW of DC power in the OAM source mode. In the receiver mode, it has a measured conversion loss of 30dB and consumes 166mW of DC power. The output OAM beam profiles and mode orthogonality are experimentally verified and a full silicon OAM link is demonstrated.  more » « less
Award ID(s):
2028824
PAR ID:
10297246
Author(s) / Creator(s):
; ; ; ; ; ;
Date Published:
Journal Name:
2021 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)
Page Range / eLocation ID:
203 to 206
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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