ABSTRACT
This chapter provides a background of millimeter wave wireless systems and discusses the possible future applications in the millimeter wave bands. It discusses the radio frequency (RF) front-end receiver architecture suitable for health care applications and subsequently explains the low-noise amplifier (LNA) fundamentals such as gain, stability circle, noise figure, and gain trade-off, etc. Higher data rates, bandwidth, and especially higher security make transmission and reception at millimeter waves an attractive option. One of the widely accepted receiver architectures is the super heterodyne or dual conversion-based receiver architecture because it offers good sensitivity and selectivity. The drawback associated with this kind of architecture is getting acceptable phase noise performance in the quadrature oscillator at the millimeter wave. The inductor at the emitter of the common emitter heterojunction bipolar transistor was used to model the parasitics that are encountered while doing the layout of the LNA.
