This work presents the design and implementation of a stand-alone linear power amplifier at 2.4 GHz with high output power. A GaN HEMT transistor is selected for the design and implementation of the power amplifier. The device exhibits a gain of 11.7 dB and a drain efficiency of 39 % for an output power of 36.7 dBm at 2.4 GHz for an input power of 25 dBm. The carrier to intermodulation ratio is...

A 2 GHz programmable-gain amplifier (PGA) using 0.12-μm CMOS technology is presented in this paper, which has a 51 dB gain control range with 3 dB gain control steps. The maximum output power of this PGA achieves 9 dBm while the 1-dB compression point is located at 8 dBm. A high linearity denoted by the oIP3 of 22 dBm at the maximum gain has been achieved. A new configuration to digitally imple...

Molecular structure and vibrational frequencies of 1,3-diphenyl-1,3-propanedione, known as dibenzoylmethane (DBM), have been investigated by means of density functional theory (DFT) calculations. The results were compared with those of benzoylacetone (BA) and acetylacetone (AA), the parent molecule. IR and Raman spectra of DBM and its deuterated analogue were clearly assigned. The calculated hy...

An RF front-end for dual-band dual-mode operation is presented. The front-end consumes 22.5 mW from a 1.8-V supply and is designed to be used in a direct-conversion WCDMA and GSM receiver. The front-end has been fabricated in a 0.35m BiCMOS process and, in both modes, can use the same devices in the signal path except the LNA input transistors. The front-end has a 27-dB gain control range, whic...

This article describes an integrated dualband multi-mode wireless LAN radio frequency power amplifier (Infineon PMB 8825) for 2.45 GHz and 5.25 GHz. The device has been realized in a 42 GHz-fT, 0.35μm SiGe-Bipolar high volume technology. The chip features two single-ended 3-stage power amplifiers for each frequency band and a control section that includes band select, standby and power control ...

We report further progress on the development of a photonic mm-wave waveguide source suitable for application as a phase reference and as a local oscillator. The mmwave power was generated in a W-band waveguide mount by the beating of two 1.55 μm laser beams in a modified commercial photodiode. Maximum optical to mmwave power conversion efficiency of 1.8% was measured at 75 GHz, where an input ...

The effect of UWB interference on the DCS-1800 and GSM-900 downlink is studied for different UWB power density. For high UWB power density (-70 dBm/MHz), the effect of UWB signals is very high when the distance between UWB transmitter and DCS-1800 receiver is less than 1 m. For low UWB power density (-100 dBm/MHz), the effect of the UWB signals is quasi null even if the distance between the UWB...