학술논문
A 29–31-GHz, 0.4-dB Amplitude Error and 1° Phase Error Beamforming IC and 20-dB Dynamic Range Power Detector for SatCom Phased Arrays
Document Type
Periodical
Author
Source
IEEE Transactions on Circuits and Systems II: Express Briefs IEEE Trans. Circuits Syst. II Circuits and Systems II: Express Briefs, IEEE Transactions on. 70(10):3837-3841 Oct, 2023
Subject
Language
ISSN
1549-7747
1558-3791
1558-3791
Abstract
This brief proposes a 30GHz beamforming transmitter IC (BFIC-Tx) with a compact power detector (PD). The PD utilizes a trace around the output GSG pad of BFIC-Tx, thus, does not need dedicated on-chip coupler area. Such PD enables closed loop power control thus, (i) enables power efficient phased arrays that are capable of adapting radiated power depending on scan losses; (ii) keeps the radiated signal within the emission limits spatially (side lobes) and spectrally (emission mask). In addition, proposed BFIC-Tx employs a modified Gilbert cell like single stage linear-in-dB variable gain amplifier (VGA) which provides 15.5dB gain range (5bits), 0.5dB resolution & 1800 phase shift. Proposed PD has a 20dB dynamic range with only 0.3dB temperature drift across −40 to +85 $^{\mathrm{ 0}}\text{C}$ . BFIC-Tx achieved state-of-art RMS gain error of $ < $ 0.4dB, RMS phase error of $ < $ 1.00, phase resolution of 5.60, PAE > 10% at $P_{\mathrm{ 1dB}}$ of 11.4dBm.