Design of an IR-UWB Transmitter with Adaptive Power Spectral Density in 0.02 – 1.4 Gpps

Authors

Faculty of Electrical Engineering, Sahand University of Technology, Tabriz, Iran

Abstract

Most of the ultra wideband (UWB) transmitters are designed for a specific pulse repeating rate (PRR). This means that the power spectral density (PSD) in these transmitters is not completely adaptable to the FCC power mask and for some PRRs, it exceeds the mask power limits. This is an important issue in short-range applications requiring a variable PRRs. In this paper, an on-off keying (OOK) impulse radio ultra wideband (IR-UWB) transmitter with adaptive PSD is proposed in 180 nm TSMC CMOS technology. The adaptivity of the PSD with PRR has been obtained using a limited monocycle precharge (LMPC) technique and phase/frequency detector (PFD) has been used in order to expand its range. The UWB pulse has been generated based on shaping filter. The results of post layout simulation show that the PSD peak value is kept closely below the equivalent isotropically radiated power (EIRP) limit, i.e., -41.3 dBm/MHz in 0.02-1.4 Gpps with only the variation of 3.38 dBm/MHz. The overall power consumption of transmitter including all of the circuits at PRRs of 10, 100, 500, and 1400 Mpps is only 0.293, 0.6235, 0.792, and 2.022 mW, respectively. The active circuit area excluding bonding pads and STG pads is only 0.38 mm2.

Keywords

References

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TABRIZ JOURNAL OF ELECTRICAL ENGINEERING
Volume 48, Issue 3 - Serial Number 85
November 2018
Pages 1349-1363

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