نتایج جستجو برای: lumped element integrated feed network

تعداد نتایج: 1160657  

Journal: :European Journal of Operational Research 2016
Veronika Grimm Alexander Martin Martin Schmidt Martin Weibelzahl Gregor Zöttl

In this paper we propose a three–level computational equilibrium model that allows to analyze the impact of the regulatory environment on transmission line expansion (by the regulator) and investment in generation capacity (by private firms) in liberalized electricity markets. The basic model analyzes investment decisions of the transmission operator (TO) and private firms in expectation of an ...

2001
Akshay R. Rao Humaira Mahi

Slotting allowances are a relatively recent trend, particular to the retail food industry. These allowances are lump-sum, up-front transfer payments from manufacturer to retailer when the manufacturer launches a new product. The practice has attracted some scrutiny because of uncertainty about its purposes and consequences. We draw from the extant literature to identify factors that potentially...

2006
Zsófia Horváth

The effect of linear lumping, linear transformation to reduce the number of state variables on controllability and observability of linear differential equations has been studied. Controllability of the original system implies the controllability of the lumped system. Examples taken from reaction kinetics illustrate our results.

Journal: :Mathematical Social Sciences 2015
Theresa Grafeneder-Weissteiner Ingrid Kubin Klaus Prettner Alexia Prskawetz Stefan Wrzaczek

This article introduces a social planner version of a model central to the New Economic Geography for explicitly answering whether the symmetric equilibrium outcome of the decentralized market economy is socially desirable. We find that savings incentives are too weak, resulting in an inefficiently low capital stock and therefore an inadequate number of product varieties. The optimal subsidy an...

2015
Yasuo Sanjo

Article history: Received 24 January 2011 Received in revised form 3 August 2011 Accepted 3 August 2011 Available online 10 August 2011 This paper analyzes tax competition for foreign direct investment with country risk using a two-country model with different market sizes. We show that the trade-off between country size as a locational advantage and country risk as a locational disadvantage af...

Journal: :IEEE Open Journal of Antennas and Propagation 2021

The first electrically steerable dual-polarized Ka-band Vivaldi antenna array with connector-less, surface-mount interface is developed. includes integrated coaxial feed lines within the element structure and contact pads on PCB. covers frequency range from 26 to 40 GHz a beam steering of approximately ±60° in elementary planes ±50° diagonal plane, having less than 3 dB scan loss. 8×8 manufactu...

2003
Abdelnasser A. Eldek Atef Z. Elsherbeni Charles E. Smith

Different approaches for the transition between two coplanar waveguides of different characteristic impedances have been investigated to improve the efficiency of both feeding network and the antenna element of an antenna system operating in the Xband. Return loss, effect of feed line shaping and parametric study are presented with each approach. The outcomes of this study leads to efficient tr...

Journal: :IEICE Transactions 2005
Kiyoshi Aikawa Kazuhiko Honjo

0 1 5 Frequency [GHz] 6 2 3 4 Abstract The validity of lumped element microwave class-F amplifier circuit design has been demonstrated experimentally. By means of the proposed class-F amplifier design method, more than 4th-order higher harmonic frequencies can be taken into account in class-F microwave amplifier design using only lumped element components. In this approach, miniaturization of c...

2010
Jun Wu Lu-Yu Wang

⎯An analysis of a 3 dB lumped-element directional coupler (LEDC) based on arbitrary terminal impedance is described numerically. To solve the conflicted requirement for broad bandwidth and small size in LEDC, a new structure of coupler is introduced, which can significantly improve bandwidth and whose size is only 3 cm×4 cm on the conditions of the frequency domain of 410 MHz to 490 MHz. The me...

2005
KAREL JANDA

The paper analyzes the government budget cost of credit guarantees and subsidies. The analysis is done both in a general qualitative manner and quantitatively for the case of Czech Supporting and Guarantee Agricultural and Forestry Fund (SGAFF). In the quantitative part of the paper we show that the portfolio of the SGAFF has a sufficient value to cover expected costs of credit guarantees and s...

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