Method of and apparatus for detecting living bodies
First Claim
1. Apparatus for detecting the presence of living bodies by means of electromagnetic signals and a receiver device for receiving electromagnetic signals, wherein the receiver device (3) for receiving electromagnetic signals includes a device for obtaining frequency components which are characteristic in respect of living bodies, out of the received electromagnetic signals, characterised in that the receiver device (3) includes a direct demodulator that demodulates the received signals to obtain said frequency components, wherein said demodulator includes a component with a non-linear current/voltage characteristic as a frequency-selective element for selecting said frequency components as output.
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Abstract
An apparatus detects living bodies, in particular human living bodies, by ectromagnetic signals. The apparatus has a receiver device for electromagnetic signals that includes a device for obtaining frequency components that are characteristic in respect to living bodies, out of the magnetic signals. The receiver device includes a direct demodulator.
54 Citations
25 Claims
- 1. Apparatus for detecting the presence of living bodies by means of electromagnetic signals and a receiver device for receiving electromagnetic signals, wherein the receiver device (3) for receiving electromagnetic signals includes a device for obtaining frequency components which are characteristic in respect of living bodies, out of the received electromagnetic signals, characterised in that the receiver device (3) includes a direct demodulator that demodulates the received signals to obtain said frequency components, wherein said demodulator includes a component with a non-linear current/voltage characteristic as a frequency-selective element for selecting said frequency components as output.
- 15. A method of detecting the presence of living bodies by means of the reception of electromagnetic signals, in which frequency components which are characteristic in respect of living bodies are obtained from the received electromagnetic signals, characterised in that the received electromagnetic signals are directly demodulated by a direct demodulator to obtain said frequency components, wherein said demodulator includes a component with a non-linear current/voltage characteristic as a frequency-selective element for selecting said frequency components as output.
Specification