Methods and systems for analyzing a volume of gas

A method for determining a concentration of a molecular species of interest, comprising:

• transmitting electromagnetic radiation into a volume of gas;
• receiving electromagnetic radiation from the volume of gas;
• and
• correlating the transmitted electromagnetic radiation to the received electromagnetic radiation to determine the concentration of the molecular species of interest within the volume of gas.

A gaseous monitoring system, comprising:

• a frequency-tunable transmitter, comprising:
• a transmit antenna;
• transmission semiconductor circuitry coupled to the transmit antenna and adapted to facilitate transmission of electromagnetic radiation at a first intensity at a characteristic frequency associated with a molecular species of interest;
• and
• frequency tuning circuitry adapted to adjust a frequency at which the electromagnetic radiation is transmitted.

A gaseous monitoring system, comprising:

• transmitting means for transmitting electromagnetic radiation at a first intensity and at a characteristic frequency associated with a molecular species of interest;
• and
• receiving means for generating a time-varying voltage based on a second intensity at which the transmitted electromagnetic radiation is received in time;
• a volume of gas separating the transmitting means from the receiving means;
• and
• processing means for correlating the first intensity to the second intensity to determine the concentration of the molecular species of interest in the volume of gas.