Maximizing Wireless Capacity With Quadplexed Wideband Antennas

Products ePMP
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High-gain antennas are large, which makes them expensive to produce, ship, and deploy. Cyber Antennas believes that if you are going to make the investment to install a high-gain antenna, you should get the most from that investment.

Cyber Antennas 0.9m dish, 1.2m dish, 1.8m dish, and horns
Cyber Antennas 0.9m dish, 1.2m dish, 1.8m dish, and horns1352×1138 335 KB

Cambium has modern high-capacity radios, but many network operators are using legacy antennas that are not tuned for the frequency ranges of the radios and do not have sufficient port isolation to achieve the higher modulation rates the radios offer. This is why we often see WISPs struggling to achieve 500 Mbps, at any distance, with Cambium ePMP 4000 radios.

Cyber Antennas is fixing this problem. For the first time, WISPs will be able to affordably maximize the capacity of their radios at distances of up to 80 km using ePMP Force 4600c radios. Cyber Antennas is developing high-performance, high-gain 1.8-meter (6-foot) antennas for the 6 GHz band, designed for long-distance backhaul with the ePMP Force 4600c. These links are expected to reach distances of up to 80 km while operating at 4096-QAM (MCS 13), delivering approximately 2 Gbps of real TCP throughput.

Cyber Antennas is also producing an affordable lineup of high-performance horn antennas:

To get the most out of Cyber Antennas’ high-gain wideband antennas, you can use Cyber Antennas quadplexers to establish four links on a single high-gain antenna and quadruple capacity. The quadplexers use cavity filters to separate frequencies with less than 0.7 dB of insertion loss, and they also function as bandpass filters, providing more than 35 dB of isolation. The quadplexer ports support radios operating at the following frequencies:

  • 5 GHz Low (4.9 – 5.35 GHz)
  • 5 GHz High (5.47 – 5.85 GHz)
  • 6 GHz Low (5.925 – 6.425 GHz)
  • 6 GHz High (6.525 – 7.125 GHz)

The 1.8-meter dishes are still in production, so datasheets are not yet available and they have not been added to our website. We expect them to be ready in Q1 2026.

Quadplexers are available today and will work with any wideband antenna that supports 4.9–7.1 GHz.

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As far as I know, it is impossible to make a feed or some other radiating element for a parabolic antenna that can work optimally in 4.9-7.1 GHz.
Gain, FB, isolation H/V and SWR will be chaotic in some parts of the 4.9-7.1 GHz spectrum.
Can there be such a broadband antenna? Yes!
Is it optimal everywhere in the range?
No!

Regards

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Your comparison of wideband versus narrowband antennas assumes that everything else is the same. It assumes the antenna engineers are equally capable and that R&D resources, production precision, build quality, and company values are the same. If all else were equal, yes, narrowband antennas would generally outperform wideband antennas. However, everything is not equal.

Some antenna designers, suppliers, and vendors are simply better than others. Some focus primarily on RF performance, while others focus on other things. In reality, IsoHorns and Cyber Antennas wideband antennas outperform every band-specific antenna on the market. Not by a little, by a lot.

Surprisingly, in some cases, our wideband antennas even outperform narrowband antennas that have better published performance parameters. This happens because our performance parameters represent worst-case performance across a much wider frequency range and those worst-case values usually occur at the edges of the frequency range. I explain this in detail in this video: