Impedance matrix of an antenna array in a quasi-optical resonator

Microwave and Millimeter Wave Power Beaming

“…Collection efficiencies approaching 100% are possible and have been achieved experimentally in the microwave [1] and mmWave regimes [29]. The theoretic limit [1], [30]- [32] assumes (1) that the apertures are aligned and (2) that the transmit amplitude and phase distributions are optimized for beaming power to the plane of the receive aperture. Note the common approximation used in Gaussian beam optics [33] tends to over-predict performance for efficiencies above 80%.…”

Analysis of finite grid structures with lenses in quasi-optical systems

“…The approach used in [2], [3] to develop a dyadic Green's function for a QO open-cavity resonator is used here to develop a Green's function for the system shown in Fig. 1.…”

“…As usual, the electric field (1) where is the electric-field dyadic Green's function and is the electric-current density source used to excite the fields, the primed notation denotes the source coordinates and the unprimed notation denotes the observation coordinates. The special insight in 0018-9480/97$10.00 © 1997 IEEE the technique discussed here is the derivation of in the following two parts: (2) where and refer to the nonmodal and modal fields, respectively. Thus, the paraxial fields (QO modes), which are largely responsible for distant interactions in the QO system and the corrected free-space (nonmodal) interactions responsible for near neighbor interactions, are separately considered.…”

Circuit Level Modeling and Computer Aided Design Tools for Millimeter-Wave Quasi-Optical Systems.

“…If we know b(t) and i a (t) + Io in the time domain, then we can use Chang's Arithmetic Operator Method (AOM) to find the spectral content of y(t). This is written y = T b i (17) where Tb is the "spectral transform matrix" of b(t) and bold type indicates spectral quantities.…”