The manufactured antenna, whose measured gain pattern is depicted in Figure 9, has about 3 dBi gain variation in this plane, which is still acceptable for an omnidirectional antenna
So the simulation comparisons between using omnidirectional antenna
cooperation and using directional antenna cooperation based on beamforming are presented in the simulation.
A mixture of directional and omnidirectional antennas
In the simulation, vertically polarized omnidirectional antennas
with 5 dBi of gain are used, and the heights of transmitter antenna and receiver antenna are 2.
The C-band terminal can display so-called be carried in a soldier's backpack with the entire ensemble including a ruggedized laptop, receiver; omnidirectional antenna
and data processing unit; plus replacement rechargeable batteries.
However, using an omnidirectional antenna
like a monopole antenna has a possibility to transmit signal in many directions.
In this paper, we propose a broadband HP omnidirectional antenna
with a planar configuration.
The AP440 can be mounted on a wall or ceiling, vertically or horizontally, with a flexible omnidirectional antenna
that can be rotated in any direction.
And where other systems deploy one radio with an omnidirectional antenna
to cover 360 degrees, we deploy three radios with 12 high-gain directional antennas.
It transmite data via Profibus, DeviceNet, and CAN protocols as well as the more conventional Mod-bus using an omnidirectional antenna
to reach sensors over a mile away.
The PDT-100, which weighs only three pounds, is extremely rugged and durable, due in part to an omnidirectional antenna
and lack of moving parts.
For instance, KARK Channel 4 has an omnidirectional antenna
that is used to create live feed for the station.
As well, the compact omnidirectional antenna
reduces average install time, errors and cost by avoiding a satellite pointing procedure.
Therefore, designing a dualband planar omnidirectional antenna
with narrow beams is still a significant challenge.
Packaged in rugged and weatherproof die cast aluminium enclosures, the radios are available in both directional and omnidirectional antenna