Tenders are invited for Delivery of sets of mechanical parts and assemblies in accordance with the design documentation of gamma-radiation sources of the BGI-A type and pouring into iron castings for gamma-ray blocks of the BGI-75A type with a conical beam
aperture - 10 pieces of lead C2
To verify the suitability of the current model to represent conical beams
, the results of the current model are compared with the exact solution for cantilevered (C-F) conical beam
with variable taper ratio [h.sub.n1] = [b.sub.n1] = 0.2, 0.5, and 0.7 as shown in Table 10.
First, we aim to produce a conical beam
covering the sector 5[degrees] [less than or equal to] [absolute value of [theta]] [less than or equal to] 20[degrees].
antennas are becoming an interesting and promising topic of research because of the explosive growth of wireless communications.
The radiated field results are compared with those of a complex conical beam
(CCB) expansion of type A and B formulated in  and a reference solution calculated by conventional aperture field integration .
1, [R.sub.2] = R*(1 + L/d), and the circular aperture defines a conical beam
with half-angle [[theta].sub.c] such that cos[[theta].sub.c] = [1 + (R/d[).sup.2].sup.-1/2].
Quadrifilar helix antennas have the unique attribute of producing a circularly polarized conical beam
while maintaining a relatively slender and compact form factor.
The small mirror and beamsplitter should be free of dirt and scratches, but they need not be especially flat in the optical sense because the cross section of the conical beam
is very small where it strikes these surfaces.
Chan, "Reconfigurable circularly-polarized patch antenna with conical beam
," IEEE Trans.
By controlling the states of the switches, the antenna characteristics can be changed into two modes: metamaterial antenna with conical beam
and linear polarization (LP) and wideband antenna with broadside beam and circular polarization (CP).
Convergent beam electron diffraction (CBED) uses a conical beam
([alpha] > [10.sup.-3] rad) to produce diffraction disks, and the intensity distribution inside the disks allows unique determination of all the point groups and most space groups -(4).
Kuramoto, "A novel planar switched parasitic array antenna with steered conical beam
," IEEE Trans.