Selecting an antenna is a process of matching frequency, gain, polarization, pattern and mechanical constraints to the real conditions of your deployment. This guide walks through each decision in order.
Overview
Understanding how to select an antenna starts with the physics of the band, then moves through pattern, gain, mounting and the practical constraints of a live deployment. The first filter is always frequency coverage; after that, gain trades against beamwidth and physical size, so the right choice balances the link budget against the available mounting space and aiming tolerance.
Frequency Bands and Spectrum
The bands most relevant to how to select an antenna are listed below. Each band brings different propagation, regulatory and antenna-size implications.
| Band | Range (MHz) | Typical use |
|---|---|---|
| Wideband (700-2700 MHz) | 700-2700 | Multiband / all-cellular |
| 700-900 MHz (4G Low Band) | 698-960 | LTE Band 12/13/5, cellular |
| 2.4 GHz (Wi-Fi / BT) | 2400-2483 | Wi-Fi / Bluetooth / Zigbee |
Recommended Antenna Types
The following antenna classes are best matched to how to select an antenna:
Directional Panel Antenna
Sector / panel antennas delivering focused gain over a defined azimuth, used for base-station sectorization and fixed point-to-multipoint links.
Omnidirectional Fiberglass Antenna
Collinear omnidirectional antennas in a UV-stable fiberglass radome for 360 degree outdoor coverage.
Yagi-Uda Antenna
High front-to-back ratio directional antennas for long-range point-to-point links and fixed CPE.
MIMO Antenna
Multi-port spatially diverse antennas (2x2 / 4x4) for high-throughput MIMO links.
Applications and Use Cases
How to Select an Antenna support a range of deployments. The most common are:
- 4G / 5G Base-Station Coverage
- Wi-Fi Coverage
- Point-to-Point Backhaul
- IoT / M2M
Mounting and Installation
Mounting environment frequently decides the antenna class before any electrical parameter: a pole gets an omnidirectional or sector antenna, a wall gets a panel, a vehicle gets a magnetic-base or low-profile antenna.
Lightning Protection and Grounding
Any outdoor selection should account for environmental rating (IP65 and above) and a lightning-protection plan as part of the bill of materials.
Standards and Compliance
Designs and deployments in this area commonly reference:
- VSWR / return-loss conventions
- dBi vs. dBd gain reference
Selection and Comparison
When narrowing down a model for how to select an antenna, weigh these trade-offs:
- Gain vs. beamwidth
- Omni vs. directional
- Indoor vs. outdoor rating
Typical gain for this category is application-specific, usually terminated in a N or SMA connector, though the interface can be customized.
Recommended Antennas from astronwireless.com
The following models from our catalog match the requirements discussed above:
AW-FG0890-12
- Band: 824-890 MHz
- Gain: 12 dBi
- Polarization: Vertical
AW-FG1922-11
- Band: 1.9-2.2 GHz
- Gain: 11 dBi
- Polarization: Vertical
AW-FG2400-15
- Band: 2.4-2.5 GHz
- Gain: 15 dBi
- Polarization: Vertical
AW-MM2425-2x15
- Band: 2.4-2.5 GHz
- Gain: 2x15 dBi
- Polarization: Dual ±45° slant / MIMO
AW-MM2425-4x15
- Band: 2.4-2.5 GHz
- Gain: 4x15 dBi
- Polarization: Dual ±45° slant / MIMO
AW-PA2425-V15B65
- Band: 2.4-2.5 GHz
- Gain: 15 dBi
- Polarization: Vertical
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