A switch‐controlled multimode narrowband receiver RF front‐end

Abstract

Summary This work illustrates a flexible and convenient method to build a multimode narrowband receiver RF front‐end by means of controlled switches, switched capacitors, and switched inductors. The front‐end comprises a dual‐gain‐mode narrowband low‐noise amplifier (LNA) and a dual‐linearity‐mode mixer. A four‐mode receiver RF front‐end constructed with the dual‐gain‐mode LNA and the dual‐linearity‐mode mixer operating in frequency band range from 1800 to 2050 MHz was demonstrated with an IBM 90‐nm CMOS process. The front‐end achieves a 1/1.6 dB noise figure, 30/20 dB power gain, and 16/−10 dBm third‐order input intercept point while draws a 5.9/3.6 mA current from a 1.8‐V supply voltage at the low noise mode and high linearity mode, respectively. The proposed technique can be employed to build an intelligent mobile system.

Mathematically inspired MIMO antenna with enhanced isolation for wireless applications

“…Data transmission is made more dependable and faster with MIMO in LTE. Before transmission, it divides the data into several streams 1 . Data and reference signals are transmitted across the air to a receiver, who is already accustomed to receive pilot signals, which aids the receiver in estimating the channel.…”