Installation Instructions Chapter 1

Navini Networks, Inc. Ripwave Base Station I&C Guide
Chapter 1
Part #40-00047-01 Rev F v1.0 (TTA) 35
October 23, 2003
Radio Frequency Subsystem (RFS)
The Radio Frequency Subsystem (RFS) is mounted on a transmission tower or building rooftop.
It transmits and receives data to and from the Ripwave Customer Premise Equipment (CPE)
using a digital beamforming transmission technique. The RFS may be either a panel antenna or
an omni antenna (Figure 6). The RFS data sheets are provided in Appendix H.
An RFS panel transmits in a directional mode, covering a transmit angle of 120 degrees. The
antenna can be used as a single mode antenna, or it can be used in a group of two or three
sectored antennas, covering 240 and 360 degrees respectively. Each panel requires a BTS to
operate. For example, in a tri-sectored cell with 3 panels, you would need 3 BTSs. The omni
antenna provides omni-directional coverage of 360 degrees.
An RFS panel or omni contains eight (8) antenna elements, cavity filters, and, optionally, low
noise amplifiers (LNA). In the TTA configurations, the PAs also are located in the RFS
(antenna) by the LNAs and cavity filters.
Figure 6: RFS
Omni Panel (front) Panel (side) 3.5 GHz TTA PanelOmni Panel (front) Panel (side) 3.5 GHz TTA Panel