Gain compensated symmetric loaded transmission line exhibiting bidirectional negative group delay
Source abstract
Abstract
A one-dimensional medium capable of bidirectional lossless negative group delay electromagnetic wave propagation is described. The medium is implemented as a microwave circuit comprising two symmetric resonator-loaded transmission lines, with active gain compensation and coupled through power combiners. We experimentally demonstrate the circuit is conditionally stable and is capable of lossless transmission of a finite bandwidth pulse in both directions. A measured group delay of −600 ps with a gain of 1.12 dB in both directions is achieved for a Gaussian pulse with a bandwidth of 14 MHz modulated at a frequency of 280 MHz (NGD-bandwidth-product of 0.0084). This circuit demonstrates the possibility of constructing a one-dimensional spatial void.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Quantum optics and atomic interactions · Terahertz technology and applications · Atomic and Subatomic Physics Research
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References (18)
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