Long-term multipactor discharge in multicarrier systems

Frequency response of multipactor discharge

This paper analyzes the frequency response of a two-surface multipactor in a rf circuit. An equation for the frequency band in which steady state multipactor can occur is derived in terms of the secondary emission properties of the surface, the quality factor Q of the rf circuit, and the operating voltage. The steady-state multipactor current is also derived, and is shown to be in excellent agr...

Temporal Evolution of Multipactor Discharge

Multipactor is an important resonant discharge phenomenon on which there have been surprisingly few publications in the open literature. Here, we extend the theoretical analysis of an idealized model. Emphases have been placed on the mutual interactions between the multipactor discharge and the rf. We show that the multipactor current may reach a very high level, transiently, before it settles ...

A novel phase focusing mechanism in multipactor discharge

In spite of the mutual repulsion among the space charges, a new phase-focusing mechanism is discovered whereby the leading edge of the multipactor discharge in an rf circuit grows at the expense of the trailing edge. This effect arises from the different impact energies, and hence different secondary electron yields, experienced by different portions of the discharge. This phase focusing mechan...

Multicarrier Systems

Over the past decade, multicarrier transmission has become one of the hottest topics in wireless communications. After its adoption in digital audio and video broadcasting systems standards in the 1980s, this transmission technique appears now in several recent wireless communications systems standards. Indeed, recent IEEE 802.11 standards for wireless local area networks are based on orthogona...

Key Issues in Designing Long-term Care Systems: A Response to Recent Commentaries