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Id 124 064

This document provides specifications for two 1/4 wavelength ground plane antennas: the GP 87-108 LB for FM radio and the GP 108-136 LB for aircraft VHF bands. Key details include frequency ranges, impedance, gain, power handling, materials, dimensions, weight and mounting instructions. Electrical data includes radiation patterns and VSWR specifications.

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27 views4 pages

Id 124 064

This document provides specifications for two 1/4 wavelength ground plane antennas: the GP 87-108 LB for FM radio and the GP 108-136 LB for aircraft VHF bands. Key details include frequency ranges, impedance, gain, power handling, materials, dimensions, weight and mounting instructions. Electrical data includes radiation patterns and VSWR specifications.

Uploaded by

bouzahri boumediene
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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GP 87-108 LB FM RADIO BAND

GP 108-136 LB VHF AIRCRAFT BAND


AIRCRAFT

OPTIONAL FT-2 FIXING BRACKET

Type : Side Mast Fixing Bracket


Top Size : ∅ 38 mm for antenna fitting
Botton Size : ∅ 42/50 mm for fitting on the mast
Weight (approx.) : 1100 gr
Material : Galvanized Steel

P/N 2510004.00 FT-2 Universal

B Copyright SIRIO antenne - Technical Data are subjected to change - Printed in ITALY - Rev. 21/01/2003 - Cod. ID124
Installation Manual
DESCRIPTION
1/4 λ Ground Plane wide-band antenna for base station service. It is made of aluminium and hi-
quality materials to get the best efficiency and robustness. Its radial whip is earthed to be protected
against the static discharges. GP 87-108 LB is developed for FM radio band and GP 108-136 LB
is particularly recommended for the aereonautic band service.

SPECIFICATIONS
Electrical Data
Type : 1/4 λ Folded Ground Plane MOUNTING INSTRUCTIONS
Frequency Range
GP 87-108 LB : RADIO band: 87-108 MHz at V.S.W.R. ≤ 2.5 :1
GP 108-136 LB : VHF AIR. band: Rx 108-136 MHz; Tx 118-136 at V.S.W.R. ≤ 2:1
Impedance : 50 Ω Unbalanced
Radiation (H-plane) : 360o Omnidirectional
Radiation (E-plane) : Beamwidth at -3 dB = 78o
Radiation angle deg. : 0o
Polarization : Vertical
Gain : 0 dBd - 2.15 dBi
Bandwidth at V.S.W.R. 2:1
GP 108-136 LB : 22 MHz
V.S.W.R. at res. freq. : ≤ 1.2 : 1
Max Power : 1000 Watts
Feed System / Position : Direct DC-Ground / Center
Connector
GP 87-108 / 108-136 LB-U : UHF Female
GP 87-108 / 108-136 LB-N : N Female

Mechanical Data
Materials : Anodized Aluminium, Nylon, Stainless Steel
Wind Load / Resistance
GP 87-108 LB : 67 N at 150 Km/h / 160 Km/h
GP 108-136 LB : 56 N at 150 Km/h / 160 Km/h
Wind Surface
GP 87-108 LB : 0.06 m2
GP 108-136 LB : 0.05 m2
Height (approx.)
GP 87-108 LB : 1190 mm
GP 108-136 LB : 890 mm
Weight (approx.)
GP 87-108 LB : 1500 gr
GP 108-136 LB : 1310 gr
Mounting Mast : ∅ 36-40 mm

ID124

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