A radio-frequency transceiver chip was designed in a UMC RF 0.18 μm CMOS process. The target RF frequency is 2.4 GHz ISM band. The specifications are a sensibility of -60 dBm and a power transmission of 0 dBm. The power supply of the transceiver is 1.8 V. Simulations show a power consumption of 10.7 mW. Innovative topics concerning efficient power management was taken into account during the de...

It has been shown that a primary cause of VHF and UHF interference to professional condenser microphones is inadequate termination within the microphone of the shield of the microphone's output wiring, a fault commonly known as the pin 1 problem. Tests using only audio frequency test signals generally fail to expose susceptibility to radio frequency (RF) interference. Simple RF tests for pin 1 ...

Optical Wireless diffuse indoor infrared (IR) communication systems have as yet large unrealised bandwidths that are not subject to the same regulatory control as Radio Frequency (RF) systems. Usually, wellestablished RF techniques are used to combat channel imperfections for IR implementations. Here, we introduce a novel receiver system based on the multi-resolution time-frequency feature extr...

A software defined radio (SDR) terminal promotes programmable realizations of the physical layer functionalities. A lot of research work has been done in applying digital signal processors (DSP) and field programmable gate arrays (FPGA) to implement the baseband functionalities of the physical layer. In this paper, the programmable solutions are extended to the radio frequency (RF) band for the...

In recent years, Wireless Sensor Networks (WSNs) research has undergone a quiet revolution, providing a new paradigm for sensing and disseminating information from various environments. In reality, the wireless propagation channel in many harsh environments has a significant impact on the coverage range and quality of the radio links between the wireless nodes (motes). Therefore, the use of div...

Multiple independent radio frequency (RF) beams find applications in communications, radio astronomy, radar, and microwave imaging. An N -point FFT applied spatially across an array of receiver antennas provides N -independent RF beams at N 2 log 2 N multiplier complexity. Here, a low-complexity multiplierless approximation for the 8-point FFT is presented for RF beamforming, using only 26 addi...

This work presents a micromachined RF-CMOS transformer fabricated in a commercially available 0.18μm CMOS process. Maskless micromachining post-processing is used to remove oxide and substrate material from around the transformer, reducing parasitic effects and improving the performance of the transformer. Index Terms — baluns, CMOS integrated circuits; MEMS, maskless micromachining, Q enhancem...

Highly integrated and advanced radio designs available today enable the engineer to design RF systems with greater levels of performance than ever before. Recent advancements in the areas of blocking, sensitivity, frequency control and baseband processing are influencing RF system architecture design. The purpose of this article is to explore some of these parametric attributes and consider the...

The proliferation of wireless transceivers in portable applications has led to increased attention to an electronic circuits’ ability to operate in the vicinity of high frequency radio transmitters. For example, in a Bluetooth headset using op amp for the voice band audio, special shielding in conjunction with good layout practice and RF suppression are needed to ensure interference-free operat...