Conformal Printed Antennas for Missile and Weapon Composite Airframes

Rockets, missiles, aircraft, and tactical weapons are extremely weight constrained. Antennas for Global Positioning Systems (GPS) (including anti-jam), command and control, telemetry, datalink, and seeker functions must coexist with structural, thermal, environmental constraints on curved airframes. Conventional fabrication produces these antennas as discrete elements mounted on brackets inside separate radomes, connected to receivers via coaxial cables and connectors. This architecture imposes parasitic mass, parasitic volume, signal loss through cables and connectors, and long-term reliability degradation as connectors corrode and radomes delaminate over shipboard storage life. Conformal printed antennas integrated directly onto composite airframe surfaces offer substantial advantages: reduced mass, reduced volume, eliminated cable and connector losses, and structural integration with the airframe itself. The technical challenge: printing radiating elements onto curved carbon-fiber substrates couples electromagnetic design with structural design, environmental protection, and the complex electrical interaction between printed conductors and the underlying conducting carbon-fiber substrate. Multi-material printed electronics, particularly aerosol-jet and inkjet direct-write processes, have matured to where conductors, dielectrics, and substrates can be co-deposited into conformal structures with controlled electromagnetic properties. The unaddressed capability is the integrated design of printed antennas on airframe substrates, with environmental protection co-designed for operational survival. The antennas shall be designed using direct-write printed electronics methods (aerosol-jet, inkjet, or comparable approaches) capable of multi-material co-deposition on curved composite substrates. Coating or environmental protection schemes shall be integrated into the design from the outset, with explicit treatment of electromagnetic transparency, loss, and detuning effects.