presenters frank plonski of hi q antennas charles m gyenes of hi q antennas july 10 2008 n.
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Presenters Frank Plonski of HI-Q-Antennas Charles M. Gyenes of HI-Q-Antennas JULY 10, 2008. Efficient HF Submarine Antennas. Overview. Background - Abstract/Problem/Solution Antenna - Design parameters/Description Performance - Data/Measured/Calculated/results. ABSTRACT.

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presenters frank plonski of hi q antennas charles m gyenes of hi q antennas july 10 2008
Presenters

Frank Plonski of HI-Q-Antennas

Charles M. Gyenes of HI-Q-Antennas

JULY 10, 2008

Efficient HF Submarine Antennas
overview
Overview

Background

- Abstract/Problem/Solution

Antenna

- Design parameters/Description

Performance

- Data/Measured/Calculated/results

abstract
ABSTRACT

For submarine applications, it is desirable to have broadband, efficient, extremely short HF antennas that can cover the whole band without the use of a complex internal/external tuning circuitry. A short monopole antenna is currently used except that it has the following disadvantages: it is not efficient and uses complex external tuning circuitry. An electrically efficient small packaged submarine antenna that operates at the HF band was developed using existing subminiature aperture technology.

In this paper, we detail the HF submarine antenna technology and performance results focusing on existing efficient submarine HF communications antennas.

problem
PROBLEM

Hard to achieve efficient HF performance in small restricted Radome cylindrical size

Current HF submarine antennas are very inefficient radiators

Complex antenna couplers decreases reliability and increases maintenance

Heat exchangers removing non-radiated RF generated heat are undesirable

solution installed on hms gotland
SOLUTION(installed on HMS Gotland)‏

HI-Q-4/2-30 installed on HMS Gotland Submarine HF Communications Antenna

HI-Q antenna has higher radiation efficiency then any other short HF submarine antenna designed to date

HI-Q antenna has only one moving part

No external complex antenna couplers

design parameters
Design Parameters

PARAMETER

HMS GOTLAND REQUIREMENT

HI-Q ANTENNA DELIVERED

Volume

92 X 4.0 inches

92 X 4.0 inches

Frequency

2-30 MHz

2-30 MHz

VSWR

1.5:1 Nominal

1.5:1 Nominal

Power

500 watts

1500 watts

Radiation Patterns

Omni-directional in Azimuth

Omni-directional in Azimuth

Gain

 @ 2.0 MHz -12dBi Minimum

rising  to + 4.5 dBi @ 30 MHz 

@ 2.0 MHz -12dBi Minimum

rising  to + 4.5 dBi @ 30 MHz

Impedance

50 ohm

50 ohm

Polarization

Vertical

Vertical

antenna description specific to the hms gotland
Antenna Description( Specific to the HMS GOTLAND)‏

HI-Q-4/2-30 is a broadband, ultra small HF aperture, 2-30 MHz tunable antenna

Inductively tuned from 2-20 MHz Re-Entrant Coaxial Capacity Hat antenna, a very broadband monopole from 20- 30 MHz.

Antenna consists of a lower mast, a tunable loading coil, a Re-Entrant Capacity Hat, and an antenna controller.

Remotely tunable (5 sec) with +24vdc motor or a stepper motor

dimensions and mass specific to the hms gotland
DIMENSIONS AND MASS( Specific to the HMS GOTLAND)‏

Total height:                                       92 inches max (includes connectors)‏

Diameter:                                           4 inches max (includes screw-bolt heads)‏

Weight:                                              20 lbs

(approx)

antenna performance
Antenna Performance

2- way worldwide communications achieved using HI-Q-6/2-30MHz Virginia Class prototype

Demonstrated high Radiation Efficiency by

2- way communications (5x9)‏

EXAMPLES: 1.850 MHz USA and Canada (2006-2007 winter),3.795 MHz  From near San Diego California to Hawaii, China, Japan, Australia, New Zealand, 3.798 MHz to South Africa, 7.250 MHz daily contacts within USA, Canada, Europe, 14-18.0- 21.0 MHz world wide with 100 watt RF SSB

conclusions
CONCLUSIONS

In this paper we have reviewed some of our calculated and experimental results on design of electrically short HF antennas.

The HI-Q antenna has higher radiation efficiency then any other short HF submarine antenna designed to date.

High Reliability –one moving part

Very COST Effective

slide15

AcknowledgmentsNAVSEA-PHL contributing team members on the Hi-Q antenna integration into the HMS GOTLAND Submarine sub-safe mast

Mr. James Stiles of NSWC-CD Philadelphia

Mr. John Ledder of NSWC-CD Philadelphia

Mr. John Dolan of NSWC-CD Philadelphia

Mr. Jason Batcho of NSWC-CD Philadelphia

Mr. Frank Plonski of NSWC-CD Philadelphia

Mr. Allan Heong of GDIT- Philadelphia