# Design and Application of Virtual Inductance of Square-Shaped Defected Ground Structure in 0.18-$\mu \text{m}$ CMOS Technology

Nusrat Jahan, Siti Amalina Enche Ab Rahim, Adel Barakat, Takana Kaho, Ramesh K. Pokharel

Research output: Contribution to journalArticle

7 Citations (Scopus)

### Abstract

This paper investigates a possibility of application of a virtual inductor realized by an integrated defected ground structure (DGS) to design a front-end circuit in CMOS technology. Two types of DGS are analyzed and found that the inductance realized by a square-shaped DGS achieves smaller size and higher quality factor than an H-shaped DGS. Then, a 15-GHz low phase noise voltage-controlled oscillator (VCO) employing the proposed square-shaped DGS in 0.18-$\mu \text{m}$ 1P6M CMOS technology is designed. The fabricated VCO operates from 15.2 to 16.12 GHz and consumes 5-mW power. The measured phase noise is-132.08 dBc/Hz at 10-MHz offset frequency, and this results in the figure of merit (FoM) and FoM taking account of the area to be 189.1 and 199.9 dB, respectively.

Original language English 7984797 299-305 7 IEEE Journal of the Electron Devices Society 5 5 https://doi.org/10.1109/JEDS.2017.2728686 Published - Sep 2017

### All Science Journal Classification (ASJC) codes

• Biotechnology
• Electronic, Optical and Magnetic Materials
• Electrical and Electronic Engineering