We realized the tunable metamaterial hyper-transmitter in the microwave range utilizing simple planar meta-structure. The single-layer metamaterial hyper-transmitter shows that the transmission peak occurs at 14 GHz. In case of the dual-layer one, it is possible to control the transmission peak from 5 to 10 GHz. Moreover, all the transmission peaks reveal transmission over 100%. We experimental...

In this paper, the use of a repeater element between transmitter and receiver capacitive wireless power transfer system for achieving larger distances is analyzed. A network formalism adopted performance described by using three gains usually in context two-port active networks. The analytical expressions as function elements are derived. Assuming that parameters link given fixed, including cou...

In this letter, a wireless power transfer (WPT) system based on two high-impedance coil (HIC) - cable loop antennas with modified shield as transmitters (Tx)s and spiral receiver (Rx) is proposed discussed. Utilizing features of HIC at its parallel-circuit resonance frequency, we design the Tx in way that absence Rx, input impedance very high compared to case when Rx near Tx. This feature offer...

We present capacity bounds and achievable rates of the Gaussian relay channel. To evaluate achievable rates we consider two cooperative strategies: decode and forward (DF) and compress and forward (CF). We investigate the impact of different channel conditions of the transmitter-relay, relay-receiver, and transmitter-receiver transmission on the bounds and rates. We also compare the results to ...

Adaptive modulation (AM) technique may make more promote in the execution of wireless communication systems through adaptively conformity transmitter parameters to fading channels; therefore, it has been taken as one of the key physical techniques. Error performance and throughput in MIMO wireless systems can be improved through the use of Adaptive Modulation. Adaptive modulation selection play...