USA flag logo/image

An Official Website of the United States Government

Modular Dynamic Tuner for Improved VLF Antenna Transmit Efficiency

Award Information

Department of Defense
Award ID:
Program Year/Program:
2013 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Physical Optics Corporation
Electro-Optics Systems 1845 West 205th Street Torrance, CA 90501-
View profile »
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2013
Title: Modular Dynamic Tuner for Improved VLF Antenna Transmit Efficiency
Agency: DOD
Contract: N66001-13-P-5125
Award Amount: $79,943.00


Addressing the Navy"s need to provide a means for high-power very-low-frequency (VLF) transmitting systems to broadcast more efficiently and effectively, Physical Optics Corporation (POC) proposes to develop a new Modular Dynamic Tuner for Improved VLF Antenna Transmit Efficiency (MODULATE). Based on a modular architecture, this proposed tuner incorporates robust components proven to operate at over 10 MVA. The modular architecture allows a variable number of identical modules to be operated in conjunction to enable compatibility with all five VLF transmitting systems operated by the Navy. The tuner inductance can be accurately controlled over millisecond timescales, allowing MODULATE to tune the antenna in sync with the 200-baud MSK modulation without generating sideband or high order harmonics during the tuning transition. As a result, MODULATE will dramatically increase the transmit efficiency of VLF systems and allow them to operate effectively as broadband VLF systems, which directly addresses the Navy requirements for submarine communications. In Phase I, through detailed analysis and modeling, POC will demonstrate that MODULATE addresses all objectives and technical risks. In Phase II, POC plans to build a prototype tuner module and test it at a Navy low-frequency test facility.

Principal Investigator:

John Matthews
Team Leader
(310) 320-3088

Business Contact:

Gordon Drew
Chief Financial Officer
(310) 320-3088
Small Business Information at Submission:

Physical Optics Corporation
Electro-Optics Systems Division 1845 West 205th Street Torrance, CA -

EIN/Tax ID: 330118051
Number of Employees:
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No