Expeditionary Very Low Frequency (ExVLF) Transmitter System

Area of Interest (AOI): Expeditionary Very Low Frequency (ExVLF) Transmitter SystemPAO Release Number: NAVWAR HQCA-2026-A-071Notice to Industry: This is an AOI issued under Naval Information Warfare Systems Command (NAVWAR) Commercial Solutions Opening (CSO) number N0003925S0001. This AOI solicits white papers/solution briefs (Phase 1 of the CSO) from industry. To the extent that any implementing regulations have not been updated to reflect statutory changes, the terms of the statute shall govern. Responses Due: 13-AUG-2026 at 2:00 PM PDTQuestions Due: 28-JUL-2026 at 2:00 PM PDTThe Government may not address all questions received. Questions and Answers will be posted on the NAVWAR CSO Website: https://www.navwar.navy.mil/Work-With-Us/Open-CSO-Calls/.Contact information for questions and technical/submission issues: ian.m.robinson14.civ@us.navy.milBackground:The Expeditionary Very Low Frequency (ExVLF) communications system is a modular, relocatable communications suite supported by an aerostat-lofted tethered antenna that enables 24/7 VLF radio wave data broadcasts over distance to maritime mobile and shore-based receive nodes.Problem StatementThe US Navy seeks solutions for an Expeditionary Very Low Frequency (ExVLF) transmitter system. The Navy requires a high-reliability solution that supports 24-hour per day, 7-day per week (24/7) data broadcast operations. As a result of this AOI, it is anticipated that initial efforts will focus on a prototype delivery phase, with potential options for follow-on production units to satisfy long-term operational inventory objectives. The system must be designed for deployment in rugged, multi-environment locations and integrate with Government-Furnished Equipment (GFE).Primary Solution Attributes:? High-Power Performance and Tuning: A containerized VLF transmitter system, consisting of a power amplification subsystem and a dynamic and automatic tuning element subsystem, designed to generate and radiate RF power by integrating...