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Stacking Yagi Antennas for Additional Gain

Stacking two or more Yagi antennas and feeding them in phase increases gain and narrows the beamwidth beyond what a single longer boom can practically achieve. Correct spacing and phasing are critical.

Overview

This guide explains how stacking yagi antennas are engineered, where they are deployed, and how to choose the right model for a real installation. Stacking two identical Yagis at the optimum spacing yields roughly 2.5-3 dB of additional gain over a single antenna, extending range while tightening the main lobe.

Frequency Bands and Spectrum

The bands most relevant to stacking yagi antennas are listed below. Each band brings different propagation, regulatory and antenna-size implications.

BandRange (MHz)Typical use
450 MHz UHF450-470Private mobile radio
700-900 MHz (4G Low Band)698-960LTE Band 12/13/5, cellular

Recommended Antenna Types

The following antenna classes are best matched to stacking yagi antennas:

Yagi-Uda Antenna

High front-to-back ratio directional antennas for long-range point-to-point links and fixed CPE.

Applications and Use Cases

Stacking Yagi Antennas support a range of deployments. The most common are:

  • Point-to-Point Backhaul
  • Public Safety / Land Mobile Radio
  • STL / Studio-Transmitter Link

Mounting and Installation

Stacked Yagis share a rigid cross-boom with precise spacing, fed by a matched phasing harness so both antennas receive equal-amplitude, in-phase signals.

Lightning Protection and Grounding

A stacked array presents more metal at height; bond the support structure and install a surge arrestor on the combined feed.

Standards and Compliance

Designs and deployments in this area commonly reference:

  • Phasing-harness impedance matching
  • dBd gain reference

Selection and Comparison

When narrowing down a model for stacking yagi antennas, weigh these trade-offs:

  • Vertical vs. horizontal stack
  • Spacing trade-offs
  • Single long boom vs. stack

Typical gain for this category is +2.5-3 dB over single, usually terminated in a N-Female connector, though the interface can be customized.

Recommended Antennas from astronwireless.com

The following models from our catalog match the requirements discussed above:

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Frequently Asked Questions

What frequency bands do stacking yagi antennas use?

Stacking Yagi Antennas typically operate across 450 MHz UHF and 700-900 MHz (4G Low Band). The primary band spans 450-470 MHz.

What antenna gain is typical for stacking yagi antennas?

A typical gain range is +2.5-3 dB over single. Higher gain narrows the beamwidth and extends range, so the right value depends on whether you need broad coverage or a focused long-distance link.

Which applications are stacking yagi antennas best suited for?

Common applications include Point-to-Point Backhaul, Public Safety / Land Mobile Radio, and STL / Studio-Transmitter Link. Stacking two identical Yagis at the optimum spacing yields roughly 2.5-3 dB of additional gain over a single antenna, extending range while tightening the main lobe.

How should stacking yagi antennas be mounted?

Stacked Yagis share a rigid cross-boom with precise spacing, fed by a matched phasing harness so both antennas receive equal-amplitude, in-phase signals.

What connector do stacking yagi antennas normally use, and can it be changed?

The usual interface is N-Female. The connector and cable assembly can be customized — SMA, N-type, TNC, BNC, FAKRA and IPEX options are available on request.

Do stacking yagi antennas need lightning protection?

A stacked array presents more metal at height; bond the support structure and install a surge arrestor on the combined feed.

Which standards apply to stacking yagi antennas?

Relevant standards and references include Phasing-harness impedance matching and dBd gain reference.

How do I get a quote for stacking yagi antennas?

Use the antenna configurator on this page to specify your frequency, gain, polarization and mounting requirements. Submit the inquiry and an engineer from astronwireless.com will respond within one business day with matched models and pricing.