The Rohde & Schwarz HE300 is an active directional antenna system for signal direction finding, interference hunting, and spectrum monitoring from 20 MHz to 7.5 GHz. The modular design comprises three interchangeable antenna elements covering the full frequency band, paired with a switchable low-noise RF amplifier for enhanced sensitivity in weak-signal environments. Passive mode operation bypasses amplification to prevent overload near strong sources. The antenna delivers unambiguous directional patterns with distinct forward-pointing maxima, enabling rapid bearing acquisition by orienting toward peak field strength. Dual-polarization capability—horizontal and vertical—is achieved by rotating the antenna module 90° before connection. Integration with portable receivers such as the Rohde & Schwarz PR100 is standard; Model .03 variants include integrated GPS and electronic compass for enhanced localization and triangulation support.
Technical Specifications
• Frequency Coverage: 20 MHz to 7.5 GHz (standard modules); 9 kHz to 20 MHz available as optional HE300HF module
• Antenna Modules: Three standard modules—20 MHz to 200 MHz, 200 MHz to 500 MHz, 500 MHz to 7.5 GHz
• Input Impedance: 50 Ω
• Gain: −27.5 dBi to +17.5 dBi (module and frequency dependent)
• VSWR: 50,000 hours (MIL-HDBK-217E, ground fixed, +25 °C)
• Connector: N-type male (1 m cable from handle)
• Dimensions: 310 mm × 90 mm × 580 mm
• Weight: Approximately 3.3 lb
– Key Features
• Low-noise amplifier with active/passive switching
• Distinct directional radiation pattern with forward maximum
• Horizontal and vertical polarization via module rotation
• Modular antenna design for broad frequency coverage
– Typical Applications
• Signal direction finding and bearing acquisition
• Interference hunting and localization
• Spectrum monitoring and EMC testing
• Field operations and laboratory measurements
– Compatibility & Integration
Designed for integration with portable receivers, particularly the Rohde & Schwarz PR100. GPS and electronic compass functionality available in Model .03 variants.
