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MU 9-XP4R/…

450 MHz 2 dB Mobile Antenna for Glass fibre Roof
Description
  • Ground plane independent antenna for installation on non-conducting surfaces.
  • Ideal for glass fibre roofs as can be found on some trucks, busses, transport vans and trains.
  • Black-chromed, conical stainless steel whip.
  • MU 9-XP4R/s can be tuned by cutting within 380…410 MHz.
  • MU 9-XP4R/l can be tuned by cutting within 400…440 MHz.
  • MU 9-XP4R/h can be tuned by cutting within 430…470 MHz.
  • M6-thread whip-fastening system.
  • Simple mounting exclusively with access from the outside.
  • Models available with oblong or circular mount.
  • Delivered with permanently attached 4 m cable terminated with
  • FME-connector (other models on request).
  • Please note that the MU 9-XP4R type “s”-, “l”- and “h”-mounts contain matching transformers. Consequently, these special mounts cannot operate with other whip types.
Specification
Electrical
Model MU 9-XP4R/…
Frequency 450 MHz band covered by three models
Antenna Type End-fed ½ λ dipole mobile antenna
Max. Input Power 40 W
Polarisation Vertical
Impedance 50 Ω
VSWR ≤ 1.3 @ f. res.
Bandwidth ≥ 15 MHz @ VSWR ≤ 1.5
≥ 30 MHz @ VSWR ≤ 2.0
Gain (EIA RS-329-1) 2 dB
Mechanical
Materials Whip :
Black-chromed, conical stainless steel
Black-chromed brass
Mount :
Black-chromed brass
Weather- and shockproof plastics
Surface treated steel
Cable 4 m cable terminated with FME-connector
(Other cable lengths and connector types on request)
Installation Torque Max. 3 Nm
Colour Black
Historic Brand Procom
Antenna Mount Type Hole Mount
Height Approx. 400 mm / 15.75 in. (see cutting diagram)
Weight Approx. 0.21 kg / 0.46 lb.
Mounting From outside : 21 mm dia. hole
From inside : 14 mm dia. hole
Mounting Plate Thickness 0.6 – 5 mm / 0.02 – 0.20 in.
Ordering Codes
Model Product No. FrequencyAdditional Information

MU 9-XP4R/s

 130001549 380 – 410 MHz Oblong mount with 4 m cable and FME-conn.

MU 9-XP4R/l

 130001550 400 – 440 MHz Same mount as above

MU 9-XP4R/h

 130001551 430 – 470 MHz Same mount as above

MU 9-CXP4R/s

 130001094 380 – 410 MHz Circular mount with 4 m cable and FME-conn.

MU 9-CXP4R/l

 130001759 400 – 440 MHz Same mount as above

MU 9-CXP4R/h

 130001606 430 – 470 MHz Same mount as above

MU 9-CXP1R/s- TNC

 130001891 380 – 410 MHz Circular mount with 1 m cable and TNC-male conn. (MOQ 25)

MU 9-CXP1R/l- TNC

 130001901 400 – 440 MHz Same mount as above (MOQ 25)

MU 9-CXP1R/h- TNC

 130001902 430… 470 MHz Same mount as above (MOQ 25)
Additional Information
Installation

This antenna is especially designed for installation on non-conducting surfaces as e.g. glass fibre roofs, as can be found on some trucks, busses, transport vans and trains.

The antenna is an end-fed, ½ λ-dipole concept which can be fed in such a way that the antenna does not require a “ground plane” as required by the standard 1/4 λ, 5/8 λ or collinear mobile whips.

It is useful to note that this antenna type can be used anywhere where the ground plane is poor or completely missing, as e.g.: side-mounted on a clamp as a pager antenna on a wall or mounted at the very edge of a ground plane without the loss induced by a tilted radiation pattern.

The antenna must be mounted on a horizontal surface. When cleaning the vehicle in car-washing machines, the whip is easily dismounted using a spanner, size 9 mm. The whip is refitted again by screwing it onto the M6 thread stud on the mount and tightening it lightly with the spanner.

1. Installation Dimensions

2. Installations Steps (From outside)

Do not use sealer on rubber gasket or other places.

3. Tuning

The antenna should always be tuned using an VSWR-indicating device. The cutting diagrams below serve as a guide for this procedure.

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-27 Version 1