Portal / gate antenna

What is it?

Portal antennas are purpose-built for doorway and gate installations. Unlike generic panel antennas mounted on brackets, portal antennas come in form factors designed to integrate into the physical structure of a doorway - freestanding pillars, overhead bars, or floor-to-ceiling columns. They are pre-engineered to create a uniform read zone across the full width and height of a passage, so that every tagged item passing through is captured regardless of where it is in the opening. Retail stores use them at entrances, warehouses use them at dock doors, and libraries use them at exits.

How it works

A portal system typically combines multiple antenna elements in a single enclosure - for example, a freestanding column might contain two or three stacked antenna elements angled to cover different heights. Overhead bar designs use downward-facing elements to cover the full width below. The antenna elements are usually circularly polarized for orientation independence. The reader cycles through the antenna ports rapidly, building a composite read zone that spans the full portal opening. Some portal systems include presence sensors (photoelectric or IR) that trigger the reader only when something is passing through, reducing power consumption and false reads.

Industries

Use cases

• Retail entrance/exit loss prevention and inventory tracking
• Library self-checkout gates
• Warehouse dock door receiving and shipping
• Hospital equipment tracking at department exits
• Event attendee flow tracking
• Data centre asset tracking through secure doors

Specifications

Manufacturers