Antenna Types Guide

Types of IoT Antennas — The Complete Guide

Omnidirectional, directional, patch, Yagi, PIFA, chip, PCB trace. When each type is the right choice and when it is definitely the wrong one.

Omni

360 degree coverage

Directional

Single direction, high gain

Patch

Flat, one-sided radiation

PIFA/FPC

For embedded hardware

Antenna Type Reference

Type	Radiation Pattern	Typical Gain	Best Application
Omnidirectional	360° horizontal	2-9 dBi	Unknown tower direction, vehicle
Directional Panel	30-90° beamwidth	8-18 dBi	Fixed, known tower direction
Patch	One hemisphere	6-10 dBi	GNSS, flush mount, building side
Yagi	Very narrow beam	10-18 dBi	Long-range, precise alignment
PIFA	Hemispheric	0-3 dBi	Embedded devices, handset-style
Chip / SMD	Omnidirectional	-2 to 1 dBi	Space-constrained embedded IoT
PCB Trace	Varies	-5 to 2 dBi	Minimum cost embedded, short range
FPC Flex	Dipole-like	0-3 dBi	Compact products, Taoglas FXUB

Omnidirectional Antennas

The most common type for outdoor fixed IoT. A vertical collinear antenna radiates 360° in the horizontal plane with a flattened doughnut-shaped pattern. The trade-off: more gain means a flatter pattern, which can miss towers at different elevations. For most UK IoT deployments in flat or gently rolling terrain, 5-8 dBi omnidirectional is the default choice.

Cross-Polarised MIMO Panel

The workhorse for modern 4G/5G MIMO deployments. Two cross-polarised elements in a single weatherproof housing. The radiation pattern is broadly omnidirectional. Poynting XPOL and QuWireless flat-panel antennas are the two most commonly specified for UK industrial IoT. The advantage over two separate omni antennas is compact mounting, one housing, and optimised polarisation diversity.

Embedded Antenna Types

For IoT product designers integrating cellular or GNSS into hardware, the antenna choice is constrained by physical space, PCB layout, and housing material. See embedded IoT antennas for a full guide to FPC, chip, and PCB trace antenna selection.

Frequently Asked Questions

When should I use a directional antenna vs omnidirectional?

Use a directional antenna when you know the direction to the serving tower and it is unlikely to change (fixed installation, rural location, single nearby tower). A directional antenna pointed correctly can recover signal that an omni antenna cannot. Use an omnidirectional antenna when you do not know the tower direction, have multiple potential serving towers, or the installation moves (vehicle). Never use a directional antenna on a vehicle or in a location where the serving tower may change.

What is the difference between a patch antenna and a panel antenna?

In common usage, the terms are often interchangeable for a flat, rectangular antenna element. Technically, a patch antenna is a microstrip element printed on a PCB (common in GNSS and embedded cellular). A panel antenna is usually a larger, weatherproof housing containing one or more antenna elements for outdoor use. The outdoor 4G/5G MIMO antennas used for fixed IoT installations are usually called panel antennas.

Can I use a magnetic mount antenna permanently on a vehicle?

Magnetic mount antennas are intended for temporary use or testing. For permanent vehicle installations, use a permanent mount antenna with a through-hole or adhesive mount. Magnetic antennas can shift or detach at high speed or in a car wash. The cable routing through the door seal also deteriorates the cable over time. For any IoT deployment requiring reliable connectivity, use a proper permanent mount.

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