A novel differentially driven dual-wideband double-layer complementary unidirectional antenna
with a biorthogonal feeding structure for 2G/3G/LTE applications is proposed.
The proposed antenna is only around 9% of the bidirectional antenna in  and 21% of the unidirectional antenna
With MUOS, we're expected to have the capability to get to a unidirectional antenna
with the solder in the foxhole."
Therefore, a novel design of dual-band magnetoelectric dipole unidirectional antenna
for 2G/3G/LTE applications with low profile structure, high gains, easy fabrication, and low cost, is highly desirable.
Wakabayashi, "Unidirectional antenna
using two-probe excited circular ring above square reflector for polarization diversity with high isolation," Progress In Electromagnetics Research, Vol.
This renders the omnidirectional antenna unsuitable for applications in the environment characterized by long and confined spaces in which a unidirectional antenna
is more appropriate.
For the point-to-point connection topology, the unidirectional antenna
is a promising candidate [10-12].
Different patch sizes have been examined within the 7-10 GHz range and a low-profile, wideband, unidirectional antenna
has been realized by using the EBG.
Luk, "Unidirectional antenna
with loaded dielectric substrate," IEEE Antennas Wireless Propag.
To realize this goal, the traditional solution is to combine two circularly polarized unidirectional antennas
back to back.
Due to the inherent balanced structure compared with the unbalanced antennas, such as dipole or loop antenna, the slot antenna has a potential advantage for low profile ultra-wideband unidirectional antennas
. Therefore, a new cavity with two layer reflectors and an ABS attached to the vertical wall of the cavity is presented in this paper.