A method of fast fingerprint search space partitioning and prescreening is disclosed. A typical apparatus includes at least a waveguide portion in at least a first branch conducting a first electromagnetic signal of a combiner, the waveguide portion having an effective size and a thermal control system effecting a temperature change in the waveguide portion to alter the effective size. The system may include a transmission circuit on one chip and a receiver circuit on another chip. Such a cowl angle may reduce the inlet’s contribution to the overall sonic boom signature for a supersonic aircraft while allowing for an increase in engine pressure recovery and a subsequent improvement in generated thrust by the engine.