GRA-750B HF Wideband Receiving Antenna
The GRA-750B is a compact wideband HF receiving antenna designed for laboratory testing, RF monitoring, and spectrum analysis applications.
Optimized for the HF spectrum from 1.5 MHz to 30 MHz, it provides stable broadband reception performance for measurement equipment such as spectrum analyzers, SDR receivers, and RF monitoring systems.
Its simple structure and reliable impedance characteristics make it ideal for controlled test environments, research labs, and engineering development work.
A Dedicated HF Antenna for Laboratory Testing
The GRA-750B is engineered specifically for wideband HF signal reception in laboratory and RF testing environments.
Unlike traditional amateur radio antennas designed for communication, the GRA-750B focuses on providing stable signal capture across the HF spectrum for measurement systems.
It is well suited for use with spectrum analyzers, SDR receivers, EMI test setups, and RF research platforms.
Optimized for HF Spectrum Monitoring
The antenna structure focuses on the HF band from 1.5 MHz to 30 MHz, covering the most important spectrum range used for:
- HF propagation research
- radio signal monitoring
- spectrum observation
- RF equipment development
- electromagnetic environment testing
The automatic tuning range covers 7 MHz to 30 MHz, while lower HF bands such as 1.6 MHz and 3.5 MHz can be supported by changing the whip element.
Stable Broadband Performance for Measurement Equipment
The GRA-750B is designed to work with professional RF instruments that require stable impedance characteristics.
Typical equipment includes:
- Spectrum analyzers
- SDR receivers
- HF monitoring stations
- RF research platforms
- EMI and EMC testing setups
This makes the antenna a practical solution for engineers and laboratories requiring repeatable HF signal capture.
Compact Structure for Flexible Test Deployment
With an overall length of approximately 1.22 meters, the GRA-750B provides a compact and convenient form factor for laboratory installations or temporary test setups.
The foldable structure also allows easy storage and quick deployment in mobile measurement scenarios or field testing environments.
Reliable Engineering Design
The antenna uses a wideband vertical structure with stable impedance characteristics and minimal installation complexity.
This ensures predictable performance across the HF band without requiring complicated adjustments.
Technical Specifications
Frequency Range
1.5 MHz to 30 MHz (HF monitoring)
1.5 MHz to 30 MHz (HF monitoring)
Automatic Tuning Range
7 MHz to 30 MHz
7 MHz to 30 MHz
Low Band Operation
1.6 MHz and 3.5 MHz via whip replacement
1.6 MHz and 3.5 MHz via whip replacement
Impedance
50 Ohms
50 Ohms
Length
Approx. 1.22 m
Approx. 1.22 m
Structure
Wideband vertical HF antenna
Wideband vertical HF antenna
Application
HF monitoring, RF laboratory testing, spectrum observation
HF monitoring, RF laboratory testing, spectrum observation
Related
TOP