User guide

PTP 800 Series User Guide Antennas and couplers
phn-2513_004v000 (Oct 2012)
1-29
Antenna polarization
Antennas can be provided as single polar or dual polar:
• Single polar : A single polar antenna provides a single interface to the RFU. The
antennas are normally supplied with vertical polarization. For horizontal polarization,
the antennas can be modified by the user using the instructions provided. Single polar
antennas can be provided with a direct mount interface or a waveguide interface.
• Dual polar: Dual polar antennas provide two interfaces, one with vertical polarization
and one with horizontal polarization. This allows two links connecting the same two
sites to share antennas, the two links operating on opposite polarizations. Dual Polar
antennas provide a waveguide interface only.
Remote mounting kits (RMKs)
Applies to ODU deployments only.
An RMK is used in an ODU (not IRFU) remote mount configurations to connect the ODU
(or coupler) to the antenna via a flexible waveguide. Direct mount configurations do not
require RMKs. The RMK has the following features:
• A clamp for attaching the RMK to a monopole.
• A cylindrical transition (Figure 21) onto which the ODU mounts.
• A waveguide interface transition (Figure 22) for connection to the antenna via a
flexible waveguide.
The choice of RMK depends upon the frequency variant. The 11 GHz RMK is always used
with a tapered transition between the antenna and the flexible waveguide.