Generally, in a DS-CDMA receiver, the received multipath fading signal s are resolved into each path having different time-delay with a searcher and then combined to generate original signal with a Rake combiner. One of the most important design objectives of the Rake combiner is how to search the paths accurately. Particularly from the viewpoint of power dissipation, the searcher operates duri...

High power, broad bandwidth, high linearity, and low noise are among the most important features in amplifier design. The broad-band spatial power-combining technique addresses all these issues by combining the output power of a large quantity of microwave monolithic integrated circuit (MMIC) amplifiers in a broad-band coaxial waveguide environment, while maintaining good linearity and improvin...

A seven ports network is proposed to act as a six-way power divider/combiner. The proposed network structure consists of a set of λ/4 planar transmission lines at the design frequency and does not require any isolating resistor. The power divider is capable of providing various power ratios by judicious choice of the transmission lines characteristic impedances. Design equations are derived for...

Photonic transmitters that operate with a high data transfer rate (over 150 Gb/s) at the O-band range (1260–1360 nm) require least 100 milliwatts of power to overcome losses are caused by using high-speed modulators. A laser higher can probably handle this requirement; however, for transmitter system, solution be problematic due nonlinear effects happen, which may lead noise in system. Thus, so...

A compact Ka-band broadband waveguide-based travelingwave spatial power combiner is presented. The low loss micro-strip probes are symmetrically inserted into both broadwalls of waveguide, quadrupling the coupling ways but the insertion loss increases little. The measured 16 dB return-loss bandwidth of the eight-way back-toback structure is from 30 GHz to 39.4 GHz (more than 25%) and the insert...