Advances in silicon processing technology have made CMOS power amplifiers a feasible option for wireless communication applications. Compared to the compoundsemiconductor counterparts, CMOS PAs become increasingly attractive due to their lower cost and higher level of integration. The continued scaling of CMOS technology further extends the cut-off frequency of CMOS devices up to several hundre...

In this paper, we derive a closed-form expression for the combiner of a multiple-input-multiple-output (MIMO) receiver equipped with a minimum-mean-square-error (MMSE) estimator. We propose using variable-bit-resolution analog-todigital converters (ADC) across radio frequency (RF) paths. The combiner designed is a function of the quantization errors across each RF path. Using very low bit resol...

←− LINC transmitters (LInear amplification with Nonlinear Components) are suitable for the power amplification of variable-envelope signals, since they allow the use of lowcost, highly-efficient strongly-nonlinear power amplifiers. However, the combination of the outputs of the LINC’s two amplifiers has is the weak part of it: the combiner losses offset the amplification efficiency gains inhere...

Thisarticlepresentsthedesign and fabrication ofa high power amplifierbased onwilkinson combiner. A 45W basic amplifier module isdesigned usinglaterally-diffused metal-oxide semiconductor (LDMOS) fieldeffect transistor (FET) PTFA260451E transistor. Wilkinson combineris used to combine two input powers toproduce 90W of power. Theproposed is researched, designed optimized usingadvanced design syst...

Brightness scaling lasers using stimulated Brillouin scattering (SBS) in optical fibers is explored. A multiple-channel amplifier approach is used to increase the total power of a laser system while avoiding a significant burden on a single channel. The work explores two approaches utilizing both SBS beam cleanup and SBS piston error conjugation. A unique beam combiner that takes advantage of t...

Analog/digital hybrid precoder and combiner have been widely used in millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems due to its energy-efficient and economic superiorities. Infinite resolution of phase shifters (PSs) for the analog beamformer can achieve very close performance compared to the full-digital scheme but will result in high complexity and intensive power consu...

A four-way power divider/power combiner using substrate integrated waveguide (SIW) and microstrip lines is proposed and investigated. The proposed power divider consists of a double-layer substrate with a bottom layer including an SIW T-junction and a top layer including a microstrip network. This microstrip network consists of a modified Gysel power divider which provides a high isolation betw...