Omni-directional VHF collinear, white, 140-174MHz, specify 3%, 250W, 4.5dBd – 4.5m

Omnidirectional VHF high band collinear antenna, PIM rated, white, 140-174 MHz, specify 3%, 250W, N-type female, PIM <120dBc, 4.5 dBd - 4.5m

Product code: G25

The ZCG Scalar G25 is a premium omnidirectional VHF high band collinear antenna engineered for reliable performance across the 140?174 MHz frequency range. Designed for commercial paging networks, trunked radio systems and general communication infrastructure, it delivers a strong 4.5 dBd gain with consistent 360-degree coverage for maximum field strength and signal reach. Built with low-PIM construction rated at < -120 dBc and supporting up to 250 watts of input power, the G25 ensures clean transmission quality in high-density RF environments where passive intermodulation can compromise system efficiency. Featuring a durable white radome for visual discretion and long-term weather protection, the G25 is suited for permanent installation on towers, masts or building structures. Its integrated N-type female termination provides secure connectivity to standard 50 Ohm coaxial feeder cables, allowing for straightforward integration into existing sites. With an overall length of 4.5 metres, the antenna?s extended aperture enhances elevation pattern control for improved coverage footprint over large service areas. For optimal performance, ZCG recommends mounting the G25 as high as possible on the supporting structure using UAM180L parallel clamps or UAM90L right-angle clamps. Whether deployed for emergency services, commercial dispatch, telemetry or broadcast relay applications, the G25 offers dependable wide-area communication capability with the resilience expected from mission-critical hardware.

Frequency

140-174 MHz - VHF high band

Bandwidth

Specify any 3% bandwidth on order

Gain

4.5 dBd

Tuning

Factory at 1.5:1 VSWR

Impedance

50 Ohms

H Plane beamwidth

360° omnidirectional ± 0.5 dBd

E Plane beamwidth

26°

Maximum Power

250 Watts

Polarisation

Vertical

PIM 3rd Order (2x20W)

<120dBc

DC grounded

Yes

Construction

White parallel fibreglass radome, anodised aluminium mount section and nickel plated N-female connector

Connector

N-type female fitted to base of mount section

Dimensions

Height: 4.5m when scaled at 148 MHz, Mount section: 595mm x 48.4mm O.D.

Weight - kg

6.5

Wind load at 160kph

12.9kg, 0.126kN

Working Temperatures

-20°~+65°C

Why Choose ZCG?

Australian Owned & Manufactured, High Quality RF Solutions Since 1970

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