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GPS-C MHU 3/FM

GPS Antenna with WHip for the 160 MHz, 450 MHz and FM Bands

  • External antenna whip mounted on the GPS-Combi mount.
  • GPS-antenna for fixed installations.
  • Black-chromed, conical stainless steel whip.
  • Easily removable for car wash.
  • Full hemispherical coverage.
  • Built-in high gain, low noise amplifier.
  • Right-Hand Circularly Polarized antenna (RHCP).
  • 5 V supply voltage (3 V respectively 12 V available on request).
  • DC supply via RF-connector.
  • Unity gain for the 160 MHz band and 3 dB gain for the 450 MHz band.
TYPE PRODUCT NO.
GPS-C MHU 3/FM 132000072
LH 108/136-1G (optional) 200000769
LH 108/136-2G (optional) 200000762
DIPX 225/330-FME (optional) 200000670

Not every combination of frequency pairs can be delivered.
When ordering, please state frequencies between 140 - 170 MHz and 400 - 470 MHz.

SPECIFICATIONS FOR WHIP

ELECTRICAL  
MODEL GPS-C MHU 3/FM
ANTENNA TYPE Tripple-frequency mobile antenna
FREQUENCY 160 MHz: F.res. within: 140 - 170 MHz
450 MHz: F.res. within: 400 - 470 MHz
FM band: 88 - 108 MHz
IMPEDANCE Nom. 50 Ω
POLARIZATION Vertical
GAIN 160 MHz: 0 dB (acc. to EIA RS-329-1)
450 MHz: 3 dB (acc. to EIA RS-329-1)
SWR ≤ 1.5 @ f.res. on both bands
MAX. POWER 25 W
MECHANICAL  
MATERIALS Black-chromed, concial stainless steel
Black-chromed brass
COLOUR Black
HEIGHT Approx. 450 mm (dep. on freq.)
WEIGHT Approx. 60 g (dep. on freq.)
MOUNTING On the GPS-Combi mount

SPECIFICATIONS FOR GPS-COMBI MOUNT

ELECTRICAL General specifications
MODEL GPS-COMBI MOUNT
ANTENNA TYPE Active patch antenna
FREQUENCY 1575 MHz
IMPEDANCE Nom. 50 Ω
POLARIZATION Circular right-hand
COVERAGE Hemispherical
GAIN 28 dBic in axial direction (typ.)
CROSS-
POLARISATION ATT.
> 10 dB (typ.)
SELECTIVITY > 45 dB down @ ± 45 MHz
BUILT-IN AMPLIFIER  
GAIN > 30 dB (typ.)
NOISE FIGURE < 1 dB (typ.)
P1 dB Approx. +7 dBm
SWR (output) ≤ 2.0
SUPPLY VOLTAGE 5 ± 0.5 VDC (3 V resp. 12 V on request)
CURRENT
CONSUMPTION
Approx. 25 mA

 

 

MECHANICAL (only for the GPS-part)
MATERIALS Cu-nite brass
Stainless steel
Reinforced thermoplastic
ANTENNA COLOUR Black
TEMP. RANGE -35° C →+75° C
CONNECTOR FME (male for GPS) +
FME (female for mobile antenna)
RECOMMENDED
INSTALL. TORQUE
4 ± 0.5 Nm
DIMENSIONS (H x L) Approx. 30 x 89 mm
ROOF THICKNESS Max. 2.5 mm
WEIGHT Approx. 114 g
MOUNTING ø18.0 mm dia. hole for roof thickness up to 2.0 mm
ø18.5 mm dia. hole for roof thickness 2.0 - 2.5 mm.
Tools for mounting included

 

 

MOUNTING INSTRUCTIONS

 

 

CABLE MOUNTING

 

 

 

TYPICAL RESPONSE CURVES

 

 

VERTICAL RADIATION PATTERN

 

 

TUNING INFORMATION

The GPS-C MHU 3/FM cannot be tuned to any pair of frequencies in the two bands. Further, the antenna must be equipped with a different kind of adjustment disc depending on the frequency pair in question.

The antenna can be used without adjustment disc, with a small adjustment disc or with a large adjustment disc. All adjustment disc types are supplied with the antenna.

Use the diagrams below as follows

1. Draw a horizontal line through the point on the vertical axis which corresponds to the 2 m-frequency in question.

2. The drawn horizontal line intersects the shaded area over a certain band
of 70 cm-frequencies.
If the 70 cm-frequency to be covered is not included in the shaded area, try another diagram (another adjustment disc type). If the 70 cm-frequency is not covered in any of the diagrams, coverage of the frequency pair in question is not possible using this type of antenna. Please note, however, that taking into account the inherent bandwidth of the antenna (± 2 MHz in the 2 m-band and ± 12 MHz in the 70 cm-band) the combination area may be increased considerably.

For the relevant diagram

3. Read the total length L1 on the left horizontal axis and cut the whip to this length.

4. Locate the 70 cm-frequency in question on the right horizontal axis and read the corresponding length L2 from the curves in the shaded area.

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WITH NO ADJUSTMENT DISC

 

 

WITH THE SMALL ADJUSTMENT DISC

WITH THE LARGE ADJUSTMENT DISC

Use an SWR-meter to fine-tune the settings

 

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