TY - JOUR
T1 - A −192.7-dBc/Hz FOm Ku-band VCO using a DGS resonator with a high-band transmission pole in 0.18-μm CMOS technology
AU - Jahan, Nusrat
AU - Barakat, Adel
AU - Pokharel, Ramesh K.
N1 - Funding Information:
Manuscript received August 2, 2019; revised August 31, 2019; accepted October 2, 2019. Date of publication November 19, 2019; date of current version December 4, 2019. This work was supported in part by a Grant-in-Aid for Scientific Research (C) under Grant JP16K06301, in part by the Telecommunication Advancement Foundation, and in part by the VLSI Design and Education Center (VDEC), The University of Tokyo in collaboration with Cadence and Keysight Corporations. (Corresponding author: Nusrat Jahan.) N. Jahan is with the Department of Electrical and Electronic Engineering, Chittagong University of Engineering and Technology (CUET), Chittagong 4349, Bangladesh (e-mail: nusratjahan@cuet.ac.bd).
Funding Information:
This work was supported in part by a Grant-in-Aid for Scientific Research (C) under Grant JP16K06301, in part by the Telecommunication Advancement Foundation, and in part by the VLSI Design and Education Center (VDEC), The University of Tokyo in collaboration with Cadence and Keysight Corporations.
Publisher Copyright:
© 2019 IEEE.
PY - 2019/12
Y1 - 2019/12
N2 - This letter presents the improvement of the phase noise (PN) of a voltage-controlled oscillator (VCO) by using a defected ground structure (DGS) resonator with a high-band transmission pole. The proposed DGS resonator has two loops in a coplanar stripline topology. The outer loop is loaded by a series capacitance, which produces the high-band transmission pole. The overall combination has a parallel capacitor to generate the necessary parallel resonance for the VCO operation. This proposed DGS resonator has a sharper impedance and frequency response slope, which results in an improved quality factor. In return, utilization of this DGS resonator into a KU-Band VCO reduces its PN. The prototyped VCO in 0.18-µm CMOS oscillates at 15.52 GHz and shows a PN of −111.27 and −134.07 dBc/Hz at 1- and 10-MHz offset, respectively, while consuming 3.3-mW power. The VCO has a frequency tuning range of 9.5%, which results in a figure of merit (FoM) of −192.7 dB.
AB - This letter presents the improvement of the phase noise (PN) of a voltage-controlled oscillator (VCO) by using a defected ground structure (DGS) resonator with a high-band transmission pole. The proposed DGS resonator has two loops in a coplanar stripline topology. The outer loop is loaded by a series capacitance, which produces the high-band transmission pole. The overall combination has a parallel capacitor to generate the necessary parallel resonance for the VCO operation. This proposed DGS resonator has a sharper impedance and frequency response slope, which results in an improved quality factor. In return, utilization of this DGS resonator into a KU-Band VCO reduces its PN. The prototyped VCO in 0.18-µm CMOS oscillates at 15.52 GHz and shows a PN of −111.27 and −134.07 dBc/Hz at 1- and 10-MHz offset, respectively, while consuming 3.3-mW power. The VCO has a frequency tuning range of 9.5%, which results in a figure of merit (FoM) of −192.7 dB.
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U2 - 10.1109/LMWC.2019.2950525
DO - 10.1109/LMWC.2019.2950525
M3 - Article
AN - SCOPUS:85077515157
SN - 1531-1309
VL - 29
SP - 814
EP - 817
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 12
M1 - 8906129
ER -