Altıntaş, Kutay and Özkan, Tahsin Alper and Burak, Abdurrahman and Yazıcı, Melik and Gürbüz, Yaşar (2024) A low noise variable gain amplifier with low phase error for X- and Ku-band phased arrays. IEEE Transactions on Microwave Theory and Techniques, 72 (9). pp. 5254-5263. ISSN 0018-9480 (Print) 1557-9670 (Online)
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Official URL: https://dx.doi.org/10.1109/TMTT.2024.3367634
Abstract
In this article, we present a detailed analysis of current steering, wideband, low noise, variable gain amplifier (VGA) and a novel method to decrease its phase and amplitude errors. A low noise VGA (LNVGA) has been designed using this innovative method in IHP's 0.13~\mu \text{m} SiGe BiCMOS technology. In this proposed method, a high impedance seen from the base of the current steering transistor replaces a low impedance to reduce the loading of the current steering device and phase variations, eventually. The operating frequency spans from 8 to 18 GHz. The measurements indicate that the maximum gain is 12.4 dB, and the minimum noise figure (NF) is 1.93 dB at the reference state. The minimum measured root-mean-square (rms) phase and amplitude errors are 0.8° and 0.04 dB, respectively, for a 0.5 dB step size and 16 dB attenuation range. The attenuation range can be increased by up to 30 dB, albeit at the cost of accruing additional phase and amplitude errors. The dc power consumption of the design is 24 mW, and the maximum input 1-dB compression point is 3.9 dBm. The overall dimensions of the chip is 0.58 mm2 including pads.
Item Type: | Article |
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Uncontrolled Keywords: | Current steering; gain control; low noise variable gain amplifier (LNVGA); low phase imbalance; phase compensation; phased array; SiGe HBT; variable gain amplifier (VGA); wideband |
Divisions: | Faculty of Engineering and Natural Sciences |
Depositing User: | Melik Yazıcı |
Date Deposited: | 20 Dec 2024 14:45 |
Last Modified: | 20 Dec 2024 14:45 |
URI: | https://research.sabanciuniv.edu/id/eprint/50530 |
Available Versions of this Item
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A low noise variable gain amplifier with low phase error for X- and Ku-band phased arrays. (deposited 27 Aug 2024 10:26)
- A low noise variable gain amplifier with low phase error for X- and Ku-band phased arrays. (deposited 20 Dec 2024 14:45) [Currently Displayed]