28-39 GHz distributed harmonic generation on a soliton nonlinear transmission line

Design optimization of meta-material transmission lines for linear and non-linear microwave signal processing

“…As it was expected, increasing g V the conversion efficiency increases as the nonlinearity of the diode capacitance increases. Moreover, it is worth noting that the frequency doubler based on nonlinear CRLH cells needs low number of cells comparing to the classical distributed frequency doubler consisting of series inductances and parallel capacitances [8].…”

Analysis of the Reflection Properties in Electromagnetic Bandgap Coplanar Waveguides Loaded with Reactive Elements

“…It is well known that a two-port network containing a shunt-connected capacitor is equivalent to a low impedance transmission line section [22]. The single requirement is that the electrical length of the line must be clearly below π/4 at the kd eq = Z eq ωC ls (5) To guaranty the previous condition, the electrical length is set to kd eq = π/10. Therefore, the characteristic impedance of the equivalent transmission line section has a frequency dependence given by:…”

“…(Micro-ElectroMechanical capacitive Switches -MEMS-have been recently proposed for the fabrication of delay lines due to their low-loss performance and high capacitance ratio achievable [3,4]). As frequency multipliers, the devices require large feeding signals, resulting in nonlinear operation and hence harmonic generation [5]. The key advantage of these distributed structures over conventional designs is the wide operating bandwidth, which can be extended up to several tens of GHz, or even more, depending on the available technology.…”

Modelling Soliton Pulses in Nonlinear Transmission Lines for Millimeter Wave Generation

“…solitons. It has been previously demonstrated that frequency multiplication takes place by decomposition of the input signal wavecycle into a set of solitons of different amplitudes and per-section propagation delays [5]. In this way, a waveform of multiple solitons per cycle is progressively produced, and hence harmonic generation achieved.…”