In this paper recent developments of RF front-end system based on the active integrated antenna design concepts are presented. Thanks to the enhancements in the design of special antennas working as radiator as well as providing the other circuit functionalities, the antenna-integrated RF front ends have been capable of improving the circuit-efficiency and compactness. These enhancements are il...

The effect of antenna mutual coupling on signal correlation and bit error rate (BER) of a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system has been modelled. A MIMOOFDM model with correlated channels is presented. The correlation matrices are determined with the antenna mutual coupling taken into account. The effect of antenna mutual coupling is chara...

This work presents the optimization of antenna captured low power radio frequency (RF) to direct current (DC) power converters using Schottky diodes for powering remote wireless sensors. Linearized models using scattering parameters show that an antenna and a matched diode rectifier can be described as a form of coupled resonator with different individual resonator properties. The analytical mo...

A random matrix model is introduced that probabilistically describes the multi–path propagation between a transmitting and receiving antenna array with a limited number of scatterers for indoor environments. The model allows to analytically calculate signal–to–interference– and–noise ratios and channel capacities for communication systems that apply, similar to the BLAST [1] proposal, antenna a...

In multi-antenna system, the correlations between the receiver antennas degrades the systems performance. In this paper, we propose a spatial decorrelation receiving technique in frequency-selective SIMO channels. A spatial-to-modal matrix is placed after the SIMO channel output to remove the correlations between the receiver antennas caused by the limited antenna separations. Simulation result...

We introduce here a simple theory of antenna radiation and scattering that fully extends into the time domain a number of standard antenna terms, including gain, realized gain, effective length, antenna pattern, beamwidth, scattering cross section, and radar cross section. Power wave theory applies to linear reciprocal antennas of all feed impedances and feed types, including waveguide feeds. I...