Periodic structures with time-varying loads

Abstract

The loading of a periodic surface with time-varying negative resistance diodes is discussed. The method predicts the transmitted and reflected power at the source frequency and the harmonic frequencies generated by the time-varying devices. The analysis uses an equivalent circuit representation at the load location in the unit cell, which is derived from the moment method solution of the periodic problem. It is therefore applicable to all angles of incidence, arbitrarily shaped surfaces, arbitrarily placed loading, lossy conductors, and surfaces supported by dielectric layers.

Increasing the efficiency of harmonic generation by nonlinear scatterers

“…Разработки антенных решеток с НР, работающих в режиме умножения частоты, начаты сравнительно давно [3][4][5][6]. Например, в [3] рассмотрена решетка НР, каждый из которых представляет собой симметричный излучатель, нагруженный на диод Шоттки.…”

“…Во-вторых, нелинейными рассеивателями являются и приемно-выпрямительные элементы (ПВЭ) систем беспроводной передачи энергии [2]. Кроме этого, в настоящее время решетки, состоящие из нелинейных рассеивателей, находят применение в миллиметровом диапазоне волн при создании источников излучения повышенной мощности [3][4][5][6].…”

Conversion Matrix Method of Moments for Time-Varying Electromagnetic Analysis

“…By collapsing the antenna to a lumped impedance, this method is extremely efficient, though it constrains loading to a single location. In [31], a periodic structure with periodically timevarying loads is treated by a similar conversion matrix / MoM (CMMoM) hybridization but again with a focus on sparse lumped loading. While these methods are useful and reflect a common practical implementation of time-varying systems through local time-varying elements, they do not directly allow for generalization to systems involving multiple loads or distributed time-varying properties.…”