Millimeter-wave printed circuit board characterization using substrate integrated waveguide resonators

This paper proposes a substrate integrated waveguide
(SIW) cavity-based method that is compliant with
ground-signal–ground (GSG) probing technology for dielectric
characterization of printed circuit board materials at millimeter
wavelengths. This paper presents the theory necessary to retrieve
dielectric parameters from the resonant characteristics of SIW
cavities with particular attention placed on the coupling scheme
and means for obtaining the unloaded resonant frequency. Different
sets of samples are designed and measured to address the
influence of the manufacturing process on the method. Material
parameters are extracted at - and -band from measured data
with the effect of surface roughness of the circuit metallization
taken into account.

Rural Support Networks in the UK and Canada: The Influence of the Patrilineal Culture of Family Farming

Rural support organisations have emerged since agricultural restructuring of the 1980s. The paper draws on research from the UK and Canada to suggest that the support in both countries is derived from a patrilineal culture that still dominates family farming. The paper begins by outlining a conceptual basis for arguing that such a culture can be understood as comprising of male and female relational gender identities capable of explaining farm relationships, farm survival and adjustment strategies and community engagement. These components, it is argued, are facets of the patrilineal farming culture which must be understood if its impacts on all its members are to be appropriately comprehended and supported.

The paper has two key aims, therefore. Firstly it suggests that a more nuanced understanding of farming „culture? which is persistently patrilineal in nature is now required which is capable of addressing the realities of farming individuals?
lives as they perceive them. The conceptualisation of such a culture is informed
by drawing on insights from gender theory, agricultural geography and rural studies. This conceptual discussion provides the context for the paper?s second aim which is to demonstrate how rural support in both the UK and Canada is derived „from? and is influenced by such a patrilineal culture . Findings are
presented identifying five key themes from this conceptualization which influence the support of such organisations. Thus, it is suggested, that the nature of rural support can be better understood and the appropriateness of the support interrogated when such conceptualization is taken on board.

Evaluation of the performance of a multi-band antenna for On-Board applications

The performance of a multi-band antenna consisting of a microstrip patch with two U-slots is designed and tested for use in aircraft cabin wireless access points. The objective of this paper is to evaluate this antenna that covers most of the current wireless bands from 1.7GHz to 5.85GHz.A specially designed wideband probe antenna is used for characterization
of field radiated from this antenna. This measurement setup gives room for future development like human presence in the cabin, the fading effects, and the path loss between transmitter and receiver.