Abstract
The Ultra-Wideband Wireless Body Area Network (UWB-WBAN) has been identified to provide an efficient, low-power, and improved wireless communication between sensor nodes worn by the human body to monitor physiological signals. The first part of the UWB receiver is a low noise amplifier (LNA). This article describes an upgrade to a sort of balun LNA that is entirely transistor-based and devoid of inductors for medical worn communication service. The balun LNA uses common gate and a common source configuration which cancels the noise generated by the common gate. This work uses the transistors in place of resistors to minimize the integrated circuit's area, as well as finding the best values for the dimensions of the transistor to minimize energy consumption, achieve a high gain and good linearity. This reduces the noise figure. The designed system utilizes the UWB frequency range of 3-5 GHz and a voltage supply of 1.8V. The designed balun LNA is able to achieve a peak gain of 25.5 dB and noise figure (NF) less than 3.2-3.5 dB using 180µm TSMC CMOS technology. The IIP3 is quite high at 2 dBm, whereas the IIP2 maximum is 21 dBm. The entire power consumption is less than 7.2 mW.
Highlights
A Wireless Body Area Network (WBAN) is a collection of sensors implanted or worn by the body
The proposed circuit can amplify the signals of frequencies between 3 GHz and 5 GHz with a gain ranging from 25.5 dB to 22 dB respectively, which shows good wideband performance
The analytical solution is derived for gain and input matching
Summary
A Wireless Body Area Network (WBAN) is a collection of sensors implanted or worn by the body. It allows information signals to be collected and communicated about a patient’s health condition, such as heart rate and blood pressure, to a base station. This advancement aids in the prevention and diagnosis of issues while preserving the patient’s autonomy[1]. UWB has the advantages of low energy consumption and high transmission data rate. These advantages make the UWB a dominating technology [6]. Narrowband LNA makes the use of inductor circuits which make it bulky and energy hungry circuits Though these have low noise figure but their integrated area is higher and requires technology with RF options to have inductors with high Q.
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