Intrinsically Interference And Jamming-Resistant High Frequency (HF) Radios

An innovative, integrated analog and digital mitigation solution which will enable HF radio receivers to fully operate while in the presence of interference. The solution is centered on a nonlinear AJ technology patented by GIRD Systems’ staff that is directly applicable to the interference/jamming problem of interest, with an initial-design prototype available for a Phase I demonstration with HF radios. Simulations and initial laboratory prototypes have demonstrated up to 49 dB of wideband interference suppression while protecting the ADC by limiting impinging RF power. Use of this approach obviates the need for exotic GaN LNAs and high linearity ADCs. The proposed concept is well-suited for deployment both as a near-term external appliqué solution to existing HF radios (Figure 1), as well as integrated into future HF radios.