This paper presents an architecture for a SiGe E-band power amplifier using a stacked transformers for output power combination. According to simulations, at E-band frequencies, the power combiner consisting of two individual single turn transformers performs significantly better compared to a single common 2:1 transformer with two turns on the secondary side. The power combination allows for a lo

Popular Abstract in Swedish Föreliggande avhandling behandlar upplevelsen av ångest i stressfulla miljöer. Studierna i avhandlingen fokuserar framförallt på att undersöka två olika frågor. Den första frågan som undersöks är om en ökad ångest som personlighetsdrag kan förutsäga en sämre förmåga att utföra olika exekutiva kontrollfunktioner framförallt relaterade till aktivitet i hjärnan pannlob. DeThe present thesis deals with perspectives of anxiety experienced in stressful environments. As such two major issues are addressed. The first issue is whether increased trait anxiety during work in a high-stress environment is related to impaired performance on executive control tasks. The second issue is whether the characteristic of a stressor and pre-stress individual differences in executive

Nocturnal vision is a demanding task for insects with small eyes. As it gets dimmer the noise imposed by the stochastic nature of photon arrival makes vision unreliable. Despite this, there are quite a number of animal species that are active at night and apparently see well. In this thesis I show that the compound eyes of nocturnal insects are sufficiently flexible to adapt to the particular wind

Limitations on the scattering matrix are derived for a wide class of objects, restricting their broadband interaction with electromagnetic vector spherical waves in terms of their size, shape and static material properties. In particular, it is seen that the order of the dominating term for electrically small objects increases with the order of the spherical wave. The results are applicable to man

Though asthma is a commonly occurring disorder today, the development and introduction of anti-inflammatory drugs in treating it has changed the possibilities of living with it. At the same time, the Swedish guidelines for asthma care have changed: the patient is to take responsibility for her or his chronic illness to attain full quality of life. The study aims to make a cultural analytical inves

The aim of this thesis was mainly to find out the conditions under which a modernisation of the standardisation process could realistically take place, in order to allow the inclusion of parameters that are currently ignored. The necessary balance between private interests and public good issues, and the need to take into the discussions leading to the adoption of standards, their generally heavy

The shift towards IP-based security products and systems is often touted as an example of a disruptive technology that have had – and will continue to have – profound consequences for the electronic security industry as a whole. Based on Clayton Christensen’s theories on disruptive innovation, this document argues that the in- troduction of IP-based technology has different effects depending on th

With the growing number of natural and social crisis in recent years, and the main impact being on countries with poor social and physical infrastructure, as part of the bigger aim of humanitarian sector in helping communities develop, building local capacities becomes an important issue to consider. Considering logistics taking up more than three fourth of relief operations, the purpose of this p