A wireless tire pressure sensing system for an aircraft comprises: dual
resonant circuits mounted to a wheel of the aircraft, each resonant
circuit comprising: a variable capacitance sensor and a wire loop of a
predetermined inductance coupled thereto, one capacitance sensor for
monitoring the pressure of a tire mounted to the wheel, and the other
capacitance sensor operative as a reference to the one capacitance
sensor; an interrogating circuit magnetically coupleable to the dual
resonant circuits and operative to induce magnetically a variable
frequency current in the dual resonant circuits, the one resonant circuit
responding to the induced current with an E-field signal at a first
resonant frequency commensurate with the capacitance of the one sensor,
and the other resonant circuit responding to the induced current with an
E-field signal at a second resonant frequency commensurate with the
capacitance of the other sensor; a receiving circuit E-field coupleable
to the dual resonant circuits and operative to receive the E-field
signals at the first and second resonant frequencies and to generate
first and second signals representative thereof; and a processing circuit
coupled to the receiving circuit for processing the first and second
signals to generate a compensated pressure reading of the tire. The
pressure sensing system may be modified to provide and/or include wheel
speed sensing.