A dairy cow’s environment may influence the onset of laminitis and associated claw horn lesions by exacerbating changes in the hoof triggered by events at parturition, onset of subacute ruminal acidosis, or claw horn growth and wear and ground reaction forces on different walking surfaces. Environmental risk factors for laminitis and associated claw horn lesions include feed bunk space and desi...

An ultra-wideband single-polarization pyramidal metal-dielectric horn feed with a dielectric insert and coaxial input is proposed investigated. As result of numerical modeling optimization parameters by the finite element difference methods in time domain, it shown that optimized provides matching stable radiation patterns two planes, as well position phase center frequency band more than an oc...

Computational fluid dynamics (CFD) has been applied to investigate the flow field which develops above the vapor feed in packed separation columns. The uniformity of the flow below the packing is assessed by means of the coefficient of variation Kp. The resulting Kp for the standard inlet is input into an empirical correlation depending on the three most important, basically geometrical, dimens...

A dual-frequency Q-/K-band circularly polarized feed with electronic tracking capability was developed. Four circumferentially located, externally coupled, diode controlled, resonant cavities were used at the horn throat to produce phase-center lateral movement. When used to feed a 24-in-diam. offset paraboloidal reflector, an average beam squint from boresight of 10 percent of the 3-dB beamwid...

The Millimeter-Wave Bolometric Interferometer (MBI) is a ground-based instrument designed to measure the polarization anisotropies of the Cosmic Microwave Background (CMB) and contains a number of quasi-optical components, including a complex back-to-back system of corrugated feed-horn antennas. In this paper we use MBI as an example to demonstrate the existing modeling techniques and as a focu...

0.97683 0.96565 A reflectarray has been designed to reradiate two beams at 6.5 and 10.5GHz in the direction Bo = 35", in the s: plane, when the feed horn is placed at a distance I = 35cm. The resulting resouant lengths in the x direction and the phase of reflection coefficient. at both frequencies, are presented in Table 1 .The theoretical E-plane patterns at 6.5 and 10.5GHz are also shown Fig. 4.