Comprod Communications BUMP-138174-DUAL User manual

Tel: US 1.877.825.2007 / CAN 1.800.603.1454
Email: [e-mail]
Fax: [phone]
Bumper Antenna BUMP-138174-DUAL
138-174 MHz
www.comprodcom.com
BUMP-138174-DUAL
Features
•Front and Rear Antenna for covert applications
•138-174 MHz, 3-14 MHz bandwidth
•Field tunable for optimal VSWR and bandwidth
•Flexible radiating element
•Easy to deploy
•Can be installed in Bumper area
•Compatible with any vehicle model or manufacturer
Description
Comprod Bumper Antenna BUMP-138174-DUAL is designed for covert
operations which require effectively invisible antenna hidden inside the
front and rear bumper of a vehicle. The bumper covers must be
plastic, and the vehicle frame is used by the antenna as a ground
plane.
Featuring a unique and compact design that integrates radiating
elements on flexible substrate, this antenna can be easily deployed on
uneven surfaces, allowing simplicity and versatility for installation. It is
an ideal all-round antenna solution for fitting into narrow spaces in
applications where completely discrete antenna is required.
The antenna is provided with 24 feet RG-8X feed cable.
Note:
The connectors is provided but not installed for ease of cable running
inside the vehicle. The connectors will need to be installed on the
cable by the customer. Other connectors and cable configuration
options are available.
For optimal performance two bumper antennas are installed, one at the
front of the vehicle and one at the rear. The Comprod power splitter is
provided for this purpose, helping to create an omni-directional pattern
around the vehicle and enabling better network coverage.

Tel: US 1.877.825.2007 / CAN 1.800.603.1454
Email: [e-mail]
Fax: [phone]
Bumper Antenna BUMP-138174-DUAL
138-174 MHz
www.comprodcom.com
Electrical Specifications
Frequency Range, MHz
138-174
Bandwidth: 2:1 VSWR, MHz
(min-max)
3-14
Nominal Gain (dBd)
Unity
VSWR
2:1
Polarization
Vertical
Nominal Impedance, Ohms
50
Pattern
Omnidirectional
Power Handling (max), Watts
50
Standard Termination
N Female
Mechanical & Environmental Specifications
Length/Height, in (mm)
16 (404.4)
Width, in (mm)
2.2 (56)
Depth, in (mm)
1.2 (30.5)
Mounting Hardware
#8-32 screws (8) provided
Operating Temperature range
°F (°C)
-40 to +140 (-40 to +60)
VSWR Curve of BUMP-138174 (antenna tuned to around 155 MHz central frequency)

TITLE
Drawn by Date
DRAWING NO.
Approved by
B-0111
MOUNTING INSTRUCTIONS
OF BUMP-138174-DUAL ANTENNA
C-44334-1
1/2
G.M J.A JAN-18-2022
CABLE GOES
THROUGH FIREWALL
FRONT
ANTENNA
RADIO
REAR
ANTENNA
INPUT CABLE
POWER DIVIDER
ANTENNA
TUNING BOX
DUAL ANTENNA INSTALLATION
& CABLE ROUTING
STEPS:
1 - When location has been well determined, fasten the antenna
tuning box with 3 self-tapping screws, to the vehicle frame.
2 - Clean internal bumper surface with degreaser solvent before
fixing (sticking as vertically as possible) the antenna.
3 - Route the input cable through the engine compartment
(secured with tie-wraps), through firewall and into the vehicle
to the radio, keeping them away from any moving parts.
4 - After routing cables, attach loose connectors,
supplied with the antennas.
NOTE:
- Do not connect cables to the radio until
the tuning procedure is complete!
- Both antennas must be tuned independently and
then connected with the power divider to the radio!
INPUT CABLE
ANTENNA
TUNING BOX
ANTENNA
TUNING BOX
INPUT CABLE

DETAIL A
SCALE 2 : 6
A
A
TITLE
Drawn by Date
DRAWING NO.
Approved by
B-0111
MOUNTING INSTRUCTIONS
OF BUMP-138174-DUAL ANTENNA
C-44334-1
2/2
G.M J.A JAN-18-2022
1.5
3
0 MHz
VSWR
3
1.5
0
VSWR
MHz
3
1.5
0
VSWR
MHz
ANTENNA TUNING - DETAIL A
1.
2.
3.
Remove
cap covers
Tuning tool
- Adjust the Left screw to
the frequency.
- Adjust the Right screw for curve
depth and frequency.
- Alternate between both
screws for optimization.
ANTENNA
ANTENNA
TUNING BOX
POWER
DIVIDER
INPUT
CABLE
RADIO CONNECTING
CABLE