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540 Omni-Directional Ultra High Gain Antenna

540 Omni-Directional Ultra High Gain Antenna

Part Number: 540300-100

dBs 540

The dBs 540 is an omni-directional broadband, 16 element, very high gain (>12dBi), collinear dipole phased array, designed specifically for use as an Automatic Dependent Surveillance-Broadcast (ADS-B) antenna. It exhibits very low side lobe levels and negative angle radiation (minimizes multipath). The above-the-horizon null-filled pattern minimizes the radiated cone of silence. The antenna handles input power to 5,000 watts at the standard ADS-B pulse duty cycle and operates at all ADS-B, L-Band frequency ranges with an input VSWR at 50 Ω of less than 2.0:1.

This antenna provides vertically polarized, omni-directional coverage with the main beam of radiation tilted upward to minimize the effects of ground reflections.

The array is enclosed and effectively weatherproofed within a lightweight, small diameter, filament wound and ground, smooth fiberglass radome, for prolonged trouble-free use under severe environmental conditions. Mounting is made by means of an integral base flange with 6 each mounting bolt holes. All RF input/output ports are Type N receptacles.

Obstruction light power is fed through the array and a provision is made for mounting an obstruction light and/or lightning arrestor at the top of the array. Lightning rod kit, obstruction light, pipe adapter (with or without stainless steel cover), and plate adapter (wall mount) are available option items.

The model dBs 540 ADS-B antenna has been designed for ruggedness, lightweight, minimum size, long life, and in accordance with FAA-E-2754 and FAA-G-2100. It also exceeds the requirements of the UK CAA specification.

dBs 540 with Marine Option (P/N: 540300-120): The dBs 540 Marine Version antenna is an optional upgrade as well. The RF transmission assembly is completely sealed and weatherproofed to protect in harsh environments such as salt water, extreme humidity, wind, sand, snow, and ice. Contact our factory for more details.

dB Systems Inc. offers ADS-B/MLAT repair and ADS-B/MLAT refurbishment at our facility. Contact us for a quotation.


Net Dimensions and Weight: 137” long, 3 1/4” O.D. radome, has top cap and base flange; 30 lbs.

Gross Dimensions and Weight: 144″ x 14″ x 19″; 275 lbs.


Inches is denoted by (“)

Outside Diameter is denoted by (O.D)

Pounds is denoted by (lbs)