CRFS DFH500 Direction Finding Antenna

By elevating direction-finding heads and RF sensors above surface clutter, BlueSky Mast systems give EW operators the vertical reach to intercept, analyze and geolocate tactical communications signals (COMINT/SIGINT) across contested environments.

BlueSky Mast + DFH500 Direction Finding Antenna

Designed to support expeditionary electromagnetic spectrum operations (EMSO), SIGINT and border security missions, BlueSky Mast systems deploy RF sensors and wideband DF antenna arrays above ground-level clutter, foliage and terrain. By securing a clear 360-degree line of sight, BlueSky's tool-less, rapid-deployment masts expand detection horizons, minimize signal attenuation and deliver the persistent, reliable tracking required in high-threat tactical environments.
Collaborative Partner
CRFS
BlueSky Mast System
350 Lift Series - 18 Meters (59 ft.)
Payload
CRFS DFH500 Direction Finding Antenna
Benefits
Rapidly elevating sensor heads above terrain variations, buildings, and tree lines ensures unimpeded RF line-of-sight coverage for 360-degree spectrum monitoring.
Stable, high-altitude positioning extends the horizon for VHF and low-UHF signals, increasing the reaction window for emitter geolocation and tactical intercept.
Engineered for severe conditions, BlueSky Masts match the rapid 20-minute deployment tempo of mobile Rapid Deployment Kits (RDKs), allowing 1–2 operators to erect and strike sensor masts swiftly.
Rigid vertical support prevents mast vibration and mechanical movement, ensuring pristine angle-of-arrival (AoA) data feeds and precise emitter bearing accuracy.
Lightweight, modular deployment mechanisms require minimal manpower to operate, keeping tactical teams agile and responsive during rapid position shifts.
Key Capabilities

The DFH500 is a compact direction-finding head that combines high-precision angle-of-arrival (AoA) direction finding with wideband spectrum monitoring and 2D/3D TDoA in a rugged, tactical format.

The DFH500 direction-finding antenna is a field-ready solution for precision monitoring and direction finding from 30 MHz to 500 MHz, covering the VHF and lower UHF bands. Designed for tactical deployments, it enables reliable real-time direction finding, signal interception and emitter geolocation where traditional systems cannot operate.

Lightweight and rapidly deployable, the DFH500 integrates fully into CRFS sensor networks and software. Ideal for electromagnetic spectrum operations, border security, interference hunting and VHF/UHF COMINT/SIGINT.

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CRFS offers interchangeable heads designed for use with Rapid Deployment Kits (RDKs), so users can build a toolkit suited to each mission.

Mission Kit

BlueSky 350 Series Mast + CRFS DFH500 Direction Finding Antenna

350 Lift Series - 18 Meters (59 ft.)

Integrated with

CRFS DFH500 Direction Finding Antenna

Model Heights: 

18

meters /

59

feet

Payload Capacity:

20.4

kg /

45

lbs

(See Capabilities Chart)

Wind Loading:

144.8

km/h /

90

mph

Deployment Time:

20-45 minutes, 2-4 people

Outside Diameter:

3.5

inches

Testing: MIL-STD-810G 

Transport:

(3) 62x21x12 Custom Hard Cases