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].
Next, a conical beam covering the sector 15[degrees] [less than or equal to] [absolute value of [theta]] [less than or equal to] 30[degrees] is generated.
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 .
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).
2] = R*(1 + L/d), and the circular aperture defines a conical beam
with half-angle [[theta].
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.
It utilizes a conical beam
of x-rays that passes around the head, allowing the capture of a three dimensional, digital radiographic image of the patient's teeth and jaw structures.
Chan, "Reconfigurable circularly-polarized patch antenna with conical beam
," IEEE Trans.
Convergent beam electron diffraction (CBED) uses a conical beam
([alpha] > [10.
Kuramoto, "A novel planar switched parasitic array antenna with steered conical beam
," IEEE Trans.