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HF · ANTENNAS · SIMULATION

Comrod AH-52 Broadband HF/VHF Dipole

This article describes the commercial Comrod AH-52 broadband HF/VHF dipole antenna and presents simulations performed with MMANA-GAL. The analysis focuses on simulated radiation patterns. Because the loading elements are omitted from the model, the results should be regarded as approximate.

HF · BROADBAND DIPOLEMMANA-GAL
Comrod AH-52 Broadband HF/VHF Dipole

Warning: This simulation model is provisional and remains under development. The results may be inaccurate or contain errors.

Comrod AH-52 antenna
TypeBroadband inverted-V dipole
ManufacturerComrod Communications Group
Impedance50 Ω
SimulationMMANA-GAL
Band2–88 MHz
Remarks: The loading elements are not included in the simulation.
Download MMANA-GAL simulation fileComrod_AH52.maa

1. Antenna design and simulation.

Comrod AH-52 MMANA-GAL model
Fig. 1. MMANA-GAL model of the Comrod AH-52 antenna.

The Comrod AH-52 is a broadband inverted-V dipole with 25 m arms and a loading element at each end. It is suitable for automatic link establishment (ALE) operation.

2. Simulated radiation patterns.

This section presents MMANA-GAL simulations of the antenna's radiation patterns at selected frequencies.

Comrod AH-52 simulated radiation patterns
Fig. 2. Simulated radiation patterns at 2, 4, 6, 8 and 10 MHz.
Comrod AH-52 simulated radiation patterns
Fig. 3. Simulated radiation patterns at 11, 13.25, 15.5, 17.75 and 20 MHz.

At frequencies up to 10 MHz, the simulated radiation patterns are approximately omnidirectional in azimuth and favour near-vertical incidence skywave (NVIS) propagation. The maximum simulated gain is approximately 7.5 dBi. At 8 MHz, the simulated radiation pattern exhibits a cardioid-like shape. Above 10 MHz, the simulated radiation patterns vary significantly with frequency and may favour longer-distance (DX) communication.

ORIGINAL PUBLICATIONSEPTEMBER 2008