User's Manual

INTRODUCTION
Confidential, Proprietary Information
Title: PolBEAMER PCS (3.2) Array System-
Assembly and Operation Manual
Doc. No.:
913000801
Rev.: 01
Page: 12 of 91
Figure 1: BEAMER® (PCS band) with beam shaping wings
Dimensions: 70x140x160 mm
Band filter
Band filter
Micro-
Controller
Power
conditioner
PA
LNA
Figure 2: BEAMER® block diagram
The antenna elements of the Tx and Rx channels are vertically and/or ± 45° slant polarized.
The separation between the receive and transmit antenna elements, and the resulting 20 dB
of isolation, enables the use of two separate band pass filters in front of the antenna
elements instead of having to use a much more complex duplexer structure.
The band pass filters (BPF) supply enough Tx/Rx channel isolation to ensure that the small
amount of Tx signal power and Tx wide band noise power leaking into the sensitive receive
channel will not degrade the Rx channel performance.
The Rx amplifier is a low noise amplifier with a high enough intercept point that several
cellular channels received simultaneously should not degrade each other's performance.
The low noise and high gain performance of this amplifier compensate for the high losses of
the coaxial cable going down from the Rx BEAMER® front-end to the base station. The Tx
Amplifier is a power amplifier that enables up to 2 Watts average at the Tx antenna element
of the BEAMER® while compensating for gain and power losses in the coaxial cable coming
up from the base station.