초록 ▼

Active electronic circuits are immersed in photonic bandgap crystals (PBC's) that form part of transmission lines for propagation of output signals of the electronic circuits. The output signals of the electronic circuits are accompanied by noise signals that result from spontaneous emission in emis

Active electronic circuits are immersed in photonic bandgap crystals (PBC's) that form part of transmission lines for propagation of output signals of the electronic circuits. The output signals of the electronic circuits are accompanied by noise signals that result from spontaneous emission in emission frequency bands which are associated with the active electronic circuits. The PBC's are configured to have photonic bandgaps that include at least a portion of the emission frequency bands. Because the active electronic circuits are immersed in the photonic bandgap crystal, the launch of at least a portion of the noise signals into the transmission line is thereby inhibited. Consequently, the output signal and less than all of the noise signals are propagated along the transmission line, i.e., the noise content of the circuit output is reduced.

대표청구항 ▼

[ I claim:] [1.] A low-noise active electronic system, comprising:an active electronic circuit having an output port and generating an output signal at said output port which is accompanied by noise signals that are generated by spontaneous emission of electromagnetic radiation in an emission freque

[ I claim:] [1.] A low-noise active electronic system, comprising:an active electronic circuit having an output port and generating an output signal at said output port which is accompanied by noise signals that are generated by spontaneous emission of electromagnetic radiation in an emission frequency band associated with said active electronic circuit;a planar transmission line coupled to said output port to receive and propagate said output signal wherein said planar transmission line includes:a) a substrate with said active electronic circuit positioned over said substrate and supported by said substrate;b) a signal line carried by said substrate and coupled to said output port; andc) a ground plane carried by said substrate and spaced from said signal line;anda photonic bandgap crystal coupled to said output port, said photonic bandgap crystal formed by spatially-periodic structures in said substrate that are configured to have a photonic bandgap which includes at least a portion of said emission frequency band so that launching of at least a portion of said noise signals onto said transmission line is inhibited, said transmission line thereby propagating said output signal and less than all of said noise signals.