Hi-Q HF antennas for EXTREMELY
restricted spaces, like Submarines -- telescoping mast installation.
The NEW Hi-Q SEA and SUB EXTREME SHORT antennas employ a new technology that allows the ELECTRICAL length of the antenna to be nearly DOUBLE -- as if it was just a vertical radiator.
More details on the Hi-Q Submarine antennas!!! Click Here!!
Here to download our powerpoint presentation on our military
Hi-Q Antennas Co. is developing a NEW HF Emergency Submarine antenna externally mounted on a Friendly nation's submarine.
It will be self-contained with built in controller for either DC or Stepper motor drives. Only the RF cable will be connected the Hull Penetrating connector.
�Hi-Q has developed the mounting and Quick Install/Removal hardware for this antenna for the submarine's fin.
The Hi-Q HF antenna products has been widely accepted as the Highest Radiation Efficiency RF Radiator, being remotelly Tunable from 2-30 MHz. It is an Extremely Short monopole antenna with a 1 kW power input.
Hi-Q Antennas has several on going HF Submarine antenna up-grade projects in various stages.
July 2008 we will give a presentation on Efficient HF Submarine Antennas
At the IEEE Antennas and Propagations World Wide Conference, URSI.
Please contact for details and questions on your EXTREAME SHORT HF
Charles M. Gyenes
When HF (High Frequency) LONG Distance Communication is a must and ONLY
limited space in LENGTH and Diameter is available, then the Hi-Q-4/2-30
SM II. HF antenna must be considered.
Developed for the US Navy System Command for Submarine HF communication
from 2 MHz to 30 MHz. The LIMITED space of 92" tall and Maximum of 4"
in diameter was given of an existing Radome that telescopes up/down
when the Submarine has surfaced. This limited space and antenna
parameters comes with losses in the HF frequencies especially at the
The Hi-Q antenna designer/developer has MINIMIZED these losses to an
acceptable level -- the RE (Radiation Efficiency) is substantially
better than ANY Submarine telescopable HF antenna to date.
Another very important benefit is that the Hi-Q antenna is a TUNABLE
antenna, IT IS NOT TUNED with an Antenna Tuner or Antenna Coupler! The
Hi-Q Loading Coil is located at the approximate center of the 92"
available max height. So, it is a CENTER loaded HF antenna.
The TOP SKIRT (normally it would be a flexible whip or a CAGE in the
EARLIER models) is acting as a CAPACITY HAT that allows the antenna to
tune to resonance at MUCH lower frequencies -- 1.8 MHz!
The CONTACTOR now allows the FULL amount of LOADING Coil inductance to
be used. As it is TUNED towards the higher frequencies, up to
approximately 22 MHz, very LOW VSWR can be maintained (< 2.0:1)
After passing 22 MHZ, low VSWR is maintained by use of a matching
The photo above shows our antenna installed on a GOTLAND Class
Hi-Q-NEWS Release 11/07
The NEW Hi-Q-6/2-30HF Submarine antenna has proven to be substantionally better than the Hi-Q-5/2-30 HF submarine antenna!
Although it is 4 inches shorter than the -5 antenna, being ONLY 50" tall the Radiation Efficiency is many dBi better than expected.
It has been under test for over 4 mos. Mounted on a large Dodge Van for imitation of a submarine sail.
On the Air test is mostly on 1.800 to 2.000 MHz and 3.600 to 4.000 MHz with either an Icom Pro II. Or a Mobat Micom-2R transceivers with less than 100 watt RF output.
Voice communication on the 160 M band up to 2000-mile radius was achieved and on the 80 M band the Pacific Rim countries and to the US east cost war regularly done at the appropriate times of the day.
Several times the South African station, ZS6CCY was heard on 3.795 MHz, but was not possible to penetrate the huge pile up of stations calling him.
We are very proud of this Extreame Short HF antenna and we are considering a Ham/Commercial version to be released early next year.
Charles M. Gyenes, W6HIQ, HA5CMG
Note: To get a price and delivery quotation for
your requirement, please contact us with
your requirements. We need to know the Max Height available and Max
Diameter available in the Radome.