If you’ve had 4G internet for a few years, the antenna on your roof could be the reason your connection isn’t performing as well as it should. Here’s what you need to know — and what you can do about it.

A Common Setup That’s Now Outdated

Across rural and semi-rural New Zealand, thousands of homes still use an antenna type called a Yagi — installed during the early days of the Rural Broadband Initiative (RBI) between 2011 and 2020. These were designed to improve 4G signal in areas with patchy coverage, and they did their job at the time.

Yagi antennas look like a long white triangle or rectangle mounted high on a pole or the roof. While they still work, most people don’t realise these older antennas can actually limit your internet speed — especially with today’s mobile network technologies.

Why Signal Strength Isn’t the Whole Story

Many people assume more signal bars = faster internet. That’s partly true — but it’s only half the picture.

Modern 4G and 5G networks use a technique called MIMO (Multiple Input, Multiple Output) to increase data throughput. Think of it like opening extra lanes on a motorway — more lanes means more room for traffic to flow. But to use those extra lanes, your antenna needs to support them.

Most older single-polarity Yagi antennas only support one data stream, even if the network could offer two or more. That means your modem is limited to just one lane — and can’t take full advantage of the speeds your provider (or tower) could deliver.

What Is “Polarisation” and Why Does It Matter?

Every radio signal is transmitted in a particular orientation — usually vertical or horizontal. If your antenna is only aligned to receive one of those (as many older Yagis are), your modem can only pick up half of what’s being broadcast.

Today’s dual-polarity antennas are designed to receive signals from both orientations simultaneously, unlocking their full MIMO capability. This can mean:

• Higher download and upload speeds
• Better performance in poor signal areas
• Improved stability during peak times

Can’t You Just Add Another Antenna?

Technically, yes — and some people do. You can stack a second antenna at a 45-degree angle to achieve “dual-polarity.” But it’s not ideal. It’s bulky, fiddly, and prone to misalignment or weather interference. You end up with more cables, more weight, and often worse performance than a single purpose-built antenna.

Today’s better solution is a compact, dual-polarity antenna that does the job properly — cleaner installation, less gear, and better performance.

But the Antenna Is Only One Part of the Puzzle

Sometimes the antenna isn’t the main issue — it’s the cabling.

Many older setups run long coaxial cables from the roof all the way down to a modem inside the house. Signal travels through the cable, and the longer the run, the more signal you lose. This loss accumulates, especially if the cable is older or was installed without high-quality connectors or proper weatherproofing.

That’s why we often recommend:

• Outdoor modem/antenna units: The SIM card is inserted directly into the unit on the roof or outbuilding — no coaxial loss.
• Ethernet or fibre run inside: Faster, cleaner, and more reliable.
• Directional tuning: We use specialised tools and experience to align gear to the strongest signal (not always the nearest tower).

A Smarter Setup = Smarter Internet

There’s no one-size-fits-all solution. You might be in full line of sight of a tower. You might be in a valley, behind a hill, or surrounded by native bush. Every property is different, and so are the optimal antenna types.

At WombatNET, we don’t sell off-the-shelf kits. We assess each location on its own merits, often using custom equipment, tools, and mounts to get the best results. Whether it’s 4G, 4G+, or 5G (where available), our goal is simple: get you the best possible performance for what you’re already paying.

You Might Be Paying for Speed You’re Not Getting

The frustrating part? You may be on a plan that should deliver decent speeds — but your antenna or cabling is getting in the way.

We’ve seen customers paying $119–$179 per month for 4G service and only getting 5–10 Mbps. With the right antenna and setup, that can jump to 30, 50, or even 100+ Mbps in some areas.

“We switched from our old setup to a new antenna and modem from WombatNET — went from 12 Mbps to 75 Mbps overnight.” — Customer in Kaitoke, Upper Hutt

We Can Help (Even If You’re Not in Our Coverage Area)

WombatNET specialises in rural and semi-rural broadband across the Wellington region — including Shannon, Upper Hutt, Kāpiti, Whiteman’s Valley, Ōtaki, Wainuiomata Coast, Foxton, and more.

If you’re unsure whether your current setup is holding you back, or want some advice, we’re happy to help. Even if you’re outside our installation area, we can usually point you in the right direction or suggest a better antenna type for your needs.

• ✅ Unlimited 4G+ broadband from $99/month
• ✅ No coax loss setups
• ✅ Installed by locals who understand rural

👉 Learn more about WombatWireless™ 4G+