User's Manual

Installation_________________________________________________ Boomer II User Manual & Integrator’s Guide
Wavenet Technology 42 BM210012WT27
Selecting an Antenna
The requirements for the antenna used with the Boomer II OEM
Modem are:
Antenna Gain: 1 dBi (isotropic) maximum average gain
if module FCC approvals are to be used
without separate equipment approval for
the host product.
Impedance: 50Ω
Centre Frequency: 833MHz ± 5MHz (for 800MHz modem)
921MHz ± 3MHz (for 900MHz modem)
Frequencies of operation: 806 to 825MHz (for 800MHz transmit)
851 to 870MHz (for 800MHz receive)
896 to 902MHz (for 900MHz transmit)
935 to 941MHz (for 900MHz receive)
Acceptable return loss: VSWR < 1.5 or RL < -14dB (recommended)
VSWR < 2.0 or RL < -10dB (minimum)
The power output of the Boomer II OEM Modem is nominally 1.8W at
the antenna port. The antenna gain or loss will affect this value.
Connecting the Antenna
The Boomer II OEM Modem Module provides an MMCX RF
connector located at the top of the unit, to attach to the antenna cable.
The antenna does not plug directly into the modem but uses an antenna
cable to interface between the device and the modem.
The antenna cable should be a low loss, 50Ω impedance and have a
MMCX plug that can mate with the modem’s MMCX socket
(82MMCX-S50-0-2). It is recommended that a Huber+Suhner
connector be used to connect to the modem as below:

11 MMCX Straight Connector

16 MMCX Right Angle Connector
If an extension cable is required to the antenna, it should be low loss, as
short as possible and an impedance of 50 ohms. Proper matching
connectors should be used, as each connector introduces a return loss
and reduces performance.