Patent ID: 8449826

Claim:
A detection device configured to detect a sample by using an electromagnetic wave including a frequency band of 30 gigahertz to 30 terahertz, the detection device comprising: an electromagnetic-wave-generation unit constructed to generate the electromagnetic wave; first and second electromagnetic-wave-transmission lines, wherein the first and second electromagnetic-wave-transmission lines have times of delay in propagation of the electromagnetic-wave that are different from each other; a coupled-transmission line configured to transmit a first electromagnetic wave propagated from the first electromagnetic-wave-transmission line and a second electromagnetic wave propagated from the second electromagnetic-wave-transmission line to a single electromagnetic-wave-detection unit; and the electromagnetic-wave-detection unit, which is configured to detect the first and second electromagnetic waves propagated through the coupled-transmission line, wherein the first and second electromagnetic-wave-transmission lines and the coupled-transmission line are formed on a substrate, wherein the first electromagnetic-wave-transmission line includes a first dielectric, wherein the second electromagnetic-wave-transmission line includes a second dielectric, wherein permittivities of the first and second dielectrics are different from each other so that a difference between the propagation-delay times of the first and second electromagnetic wave-transmission lines is greater than a pulse width of the electromagnetic wave, and wherein the electromagnetic-wave-detection unit outputs time waveforms of the first and second electromagnetic waves separately.