An overview about mutual coupling analysis in antenna arrays is given. The relationships
between array impedance matrix and embedded element patterns, including beam coupling …

For phased array receivers, mutual coupling leads to beam-dependent active impedances
which must be taken into account when matching the array ports to front end amplifiers for …

Relative to traditional waveguide feeds, phased array feeds (PAFs) for radio telescopes can
increase the instrument field of view and sky survey speed. Unique challenges associated …

We present a metamaterial absorber detector array that enables room-temperature, narrow-
band detection of gigahertz (GHz) radiation in the S band (2–4 GHz). The system is …

Two methods for defining the efficiencies and system noise temperature of a receiving
antenna array have recently been developed, one based on the isotropic noise response of …

In this letter, it is demonstrated that the beam sensitivity of an antenna array receiving system
can be analyzed by using an equivalent single-channel receiver model. In this model, the …

From classical two-port noise theory, the noise figure of an amplifier is minimized when a
source is matched to a particular optimal reflection coefficient at the amplifier input. In this …

Multiple-input multiple-output (MIMO) radar systems use orthogonal signaling to enable
combined transmit and receive beamforming through signal processing on the received …

The low frequency array (LOFAR) is a phased array radio telescope that is currently being
built in The Netherlands with extensions throughout Europe. It was officially opened on June …

A focal plane array (FPA) feeding a reflector can be used to achieve a large field of view
(FOV) with overlap** simultaneous beams. In order to provide a continuous FOV over …