A new approach for power combining several low-voltage CMOS amplifiers using a new on-chip transmission line transformer structure is presented. The power combiner utilises the interconnection of short sections of integrated differential lines and has an efficiency independent of the transformation ratio. Full-wave electromagnetic simulation confirms the operation and low insertion loss of the ...

Abstract—This paper introduces two new type active quasi circulators and three new type active circulators which use the outof-phase power divider/combiner, symmetric/anti-symmetric couplers and generic unilateral amplifiers. The proposed circuits are full-symmetric and composed of conventional microwave devices. Analytical relations for active quasi circulator modules are described. These modu...

This paper concerns power allocation in relay-assisted wireless channels for two-hop transmission. First, the transmitter sends the information to both the relay and receiver parts. Next, in the second hop, the transmitter cooperates with the relay to increase the received signal to noise ratio (SNR), assuming the relay makes use of the Amplify and Forward (AF) strategy. Moreover, it is assumed...

We present a design of an integrated beam combiner which cascades power combiners and polarization converter/combiner. The proposed device has 2 dB lower loss than power combiners and is more fabrication-tolerant than wavelength combiners. The Optical Society (OSA) This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part wi...