Sirio GPA 135-175 Mono Band Antenna

Main Features

• Base station antenna, Mono-band
• Omnidirectional, Unity gain
• Made of aluminium alloy 6063 T-832
• Tunable by whip length adjusting
• Side mast mounting allowed by optional bracket FT-2 code 2510004.00
• P/N 2101601.00 GPA 135-175

Electrical Data

• Type: 1/4λ ground plane
• Frequency range: tunable from 135 to 175 MHz
• Impedance: 50Ω unbalanced
• Radiation (H-plane): 360° omnidirectional
• Radiation (E-plane): beamwidth at -3 dB = 86°
• Radiation angle: 0°
• Polarization: vertical
• Gain: 0 dBd - 2.15 dBi
• Bandwidth at V.S.W.R. 2:1: 13 MHz at 135 MHz
• V.S.W.R. at res. freq.: ≤ 1.2:1 at start freq.
• Max. power: 300 Watts
• Feed system / position: direct / centre
• Connection: UHF-female

Mechanical Data

• Materials: Aluminium, Chromed brass, Nylon
• Wind load / resistance: 29 N at 150 Km/h / 180 Km/h
• Wind surface: 0.03 m²
• Height (approx.): 960 mm
• Weight (approx.): 520 gr
• Radial length (approx.): 520 mm
• Mounting mast: Ø 35-40 mm

Sirio GPA 135-175 MHz Mono Band Base Antenna

The 'Sirio GPA 135-175' is a omidirectional low gain, mono band base station antenna. Suitable for land and marine service.

It works on the frequency range of 135-175 MHz by using the tuning diagram enclosed. The matching coil is DC feeded for a perfect protection from the static discharges. Sirio GPA 135-175 is made of non-corrosive aluminium and assembled on a very strong base of die-cast metal to get the maximun robustness and the best performance. Tuning is easy by following the attached directions.

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