Helical Resonator Filters With Improved Power Handling Capabilities for Space Applications

Analytical and numerical simulation of multipactor within a helical resonant filter

“…One such helical resonant filter, with a passband at 300 MHz, has been the subject of an investigation with the Particlein-Cell code, CST Particle Studio, to observe the conditions under which multipactor occurs. Similar structures have received previous experimental and analytic consideration [6]. A cut-plane view of the geometry examined is shown in Figure 1; here, the two internal helices are connected to co-axial lines, which provide the RF to the system.…”

Satellite Communications in the New Space Era: A Survey and Future Challenges

“…A marking difference from passive antennas is, thus, the distributed amplification of the radiating signal. The spatial RF power distribution and the reduced peak RF power levels in active arrays improve reliability (including reducing multipaction thresholds [85]) and provide a graceful degradation. Recent developments in wide bandgap semiconductor technologies (e.g.…”

Helical resonator filters with improved multipactor performance exploiting rigorous modelling and the large gap approach

“…Helical resonator filters bring significant advantages for very highfrequency (VHF) and ultra-high-frequency spaceborne applications, due to the favourable trade-off between mass/volume and Q-factor that they offer [1][2][3][4]. Despite these benefits, they suffer from power handling limitations, which can lead to major consequences including even the loss of a satellite [5].…”

“…Despite these benefits, they suffer from power handling limitations, which can lead to major consequences including even the loss of a satellite [5]. Recent work performed for improving power handling in this class of filters has focused on the selective dielectric filling approach [1]. This study produces encouraging results, demonstrating ∼90 W of power handling with a minimum compromise in terms of electrical performance.…”