| 1. |
- Beckman, Claes, 1962-
(författare)
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Dual polarised multibeam antenna
- 1999
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Ingår i: Electronics Letters. - : Institution of Engineering and Technology (IET). - 0013-5194 .- 1350-911X. ; 35:25, s. 2158-2160
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Tidskriftsartikel (refereegranskat)abstract
- A dual polarised four-beam antenna array for the 1850-1990 MHz frequency band is presented. The polarisations are ±45° to vertical. The antenna has eight inputs corresponding to two orthogonal polarisations and four beams. The return loss and cross-polar isolation for a single Butler beam exceeds 15 and 22 dB, respectively. The radiation pattern is similar to an ideal Butler pattern and the cross-polarisation level is <-21 dB in the beams
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| 2. |
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| 3. |
- Händel, Peter, 1962-
(författare)
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Compensation for saturation effects in FIR-NLMS system identification
- 1998
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Ingår i: Electronics Letters. - : Institution of Engineering and Technology (IET). - 0013-5194 .- 1350-911X. ; 34:4, s. 411-412
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Tidskriftsartikel (refereegranskat)abstract
- An adaptive scheme is derived to be used in combination with the normalised least mean squares algorithm for finite impulse response models (FIR-NLMS), to combat nonlinear imperfections of the plant to be identified. The scheme is shown to outperform FIR-NLMS when a test system that consists of a variable static nonlinearity in cascade with a linear filter is identified.
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| 4. |
- Nyberg, Sten, 1962-, et al.
(författare)
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Vanity and Congestion : A Study of Reciprocal Externalities
- 1996
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Ingår i: Economica. - : JSTOR. - 0013-0427 .- 1468-0335. ; 63:249, s. 97-111
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Tidskriftsartikel (refereegranskat)abstract
- This paper models a private goods oligopoly market characterized by negative and reciprocal externalities. Although firms compete in prices, and products are undifferentiated in equilibrium, the price-cost margin turns out to be positive. From a social perspective, the equilibrium price is higher than what is motivated by the negative externality. Hence welfare can be improved by means of a price ceiling. Finally, industries with high fixed costs would be expected to exhibit a high degree of concentration on the supply side and considerable price-cost margins.
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