Choosing a Base Station Antenna: BASE001, BASE004 and BASE301 Compared

A base station antenna is the single biggest factor in how far a repeater, dispatch site or fixed installation will reach. Renair's base station range covers four families — BASE001, BASE004, base301 and HPBASE001 — and the right choice depends on three things: frequency band, gain versus coverage angle, and how much power the site needs to push through it.

Unity gain versus higher-gain designs

The BASE001 A/B/C/D/E/X and HPBASE001 A/B/C/D/E are both unity-gain collinear designs (0 dBd, 2.1 dBi) with a wide 78–80° vertical beamwidth. That wide pattern matters at sites built on a mast or tower: a unity-gain antenna keeps signal spread evenly across the local horizon rather than concentrating it into a narrow slice. The base301 A/B/C/D/E/F/G/H/J/K/X trades that breadth for 3 dBd of gain and a narrower 30° beamwidth, which suits sites where the coverage area is known and concentrated rather than spread in every direction.

Matching frequency and power to the site

BASE001 covers VHF from 118–174 MHz across its A–X variants, including a broadband X option spanning the full range. BASE004 moves into UHF, with variants from 330–512 MHz. base301 sits in the same VHF range as BASE001 but in narrower sub-bands, which is what allows the higher gain. HPBASE001 covers 112–178 MHz and is rated to 500 W, roughly three times the power handling of the standard BASE001 (150 W) — the obvious choice for higher-power repeater transmitters rather than a 50 W radio.

Mounting and connectors

All four families mount on a 30–60 mm vertical mast tube or via wall bracket, terminate in N-female, and carry an IP66 rating with a 55 m/s survival wind speed — standard for UK rooftop and mast installations. Fibreglass radomes over a brass, copper and aluminium element keep all four families serviceable in coastal and exposed sites without special order.

Browse the full base station range at renair.co.uk/products, or compare gain and frequency options directly against your site requirement before ordering.

Where base station antennas fit in a wider system

Base station antennas rarely work alone. On multi-channel repeater sites, several transmitters typically share one antenna through a combiner — see our guide to duplexers, combiners and couplers for how that's done without one transmitter swamping another. For public safety and emergency services deployments specifically, our TETRA antenna guide and ESN progress update cover the wider network context these base stations sit within.

Frequently asked questions

What's the difference between BASE001 and base301?

Both cover similar VHF ranges, but BASE001 is unity gain with a wide 78° beamwidth for broad coverage, while base301 delivers 3 dBd gain with a narrower 30° beamwidth for concentrated coverage in a known direction.

Do I need the high-power HPBASE001 instead of BASE001?

Only if your transmitter power exceeds roughly 150 W continuous. HPBASE001 is rated to 500 W and is built for higher-power repeater and base station transmitters; for typical 25–50 W mobile radio systems, BASE001 is the more cost-effective choice.

Can BASE004 be used for 5G or LTE applications?

BASE004 is a UHF land mobile radio antenna (330–512 MHz) designed for PMR and similar professional radio bands, not cellular. For 5G or LTE base station requirements, see our 5G frequency bands and IoT antenna guide.