The Experts below are selected from a list of 111 Experts worldwide ranked by ideXlab platform
Kenneth L Simons - One of the best experts on this subject based on the ideXlab platform.
-
dominance by birthright entry of prior radio producers and competitive ramifications in the u s Television Receiver industry
Strategic Management Journal, 2000Co-Authors: Steven Klepper, Kenneth L SimonsAbstract:The U.S. Television Receiver industry evolved to be an oligopoly dominated by firms that produced radios prior to TVs. Data on the experience of all U.S. radio manufacturers and on the length of survival and rate of innovation of all U.S. TV entrants are collected to analyze how radio experience influenced entry, firm performance, and the evolution of market structure in the TV industry. Consistent with a model of the evolution of an oligopolistic industry, more experienced radio firms were more likely to enter TV manufacturing, had higher innovation rates, and in turn had greater market shares and longer survival, suggesting that firm capabilities and the evolution of the TV industry's market structure were critically shaped by firms' experience prior to entry. Copyright © 2000 John Wiley & Sons, Ltd.
-
The SMS Blackwell Handbook of Organizational Capabilities - Dominance by birthright: entry of prior radio producers and competitive ramifications in the U.S. Television Receiver industry
Strategic Management Journal, 2000Co-Authors: Steven Klepper, Kenneth L SimonsAbstract:The U.S. Television Receiver industry evolved to be an oligopoly dominated by firms that produced radios prior to TVs. Data on the experience of all U.S. radio manufacturers and on the length of survival and rate of innovation of all U.S. TV entrants are collected to analyze how radio experience influenced entry, firm performance, and the evolution of market structure in the TV industry. Consistent with a model of the evolution of an oligopolistic industry, more experienced radio firms were more likely to enter TV manufacturing, had higher innovation rates, and in turn had greater market shares and longer survival, suggesting that firm capabilities and the evolution of the TV industry's market structure were critically shaped by firms' experience prior to entry. Copyright © 2000 John Wiley & Sons, Ltd.
P Vainikainen - One of the best experts on this subject based on the ideXlab platform.
-
effect of the user s hands on the operation of lower uhf band mobile terminal antennas focus on digital Television Receiver
IEEE Transactions on Electromagnetic Compatibility, 2011Co-Authors: Jari Holopainen, O Kivekas, Clemens Icheln, Janne Ilvonen, Risto Valkonen, P VainikainenAbstract:This paper deals with the effect of the user's hands on the performance of lower UHF-band antennas in handheld terminals. It is studied that how the input impedance, efficiency, and far-field directional pattern of the internal broadband digital Television antenna are affected by the presence of the user's hands. The main part of the study has been carried out by applying finite-difference time-domain simulations. Measurements have been performed to support the results obtained by simulations. In the worst case, as much as 7-11 dB decrease of the antenna efficiency compared to free space case is shown. The results also indicate that the power absorption to the hand(s) is generally a more severe problem for the total efficiency than the change of the matching. On the other hand, it is also shown that in certain cases, the total efficiency of the antenna can even be improved due to the hands of the user. The results of this paper increase the understanding of the effect of the user's hands on the operation of the lower UHF-band antennas, whose operation is based on the radiation of a finite ground plane.
-
internal broadband antennas for digital Television Receiver in mobile terminals
IEEE Transactions on Antennas and Propagation, 2010Co-Authors: Jari Holopainen, O Kivekas, Clemens Icheln, P VainikainenAbstract:The Implementation of internal broadband antennas for digital Television Receiver (DTV) in mobile terminals operating at the lower UHF band is studied comprehensively. Certain challenges such as inherently narrow impedance bandwidth of electrically small antennas and limited volume available for the antennas inside mobile terminals are identified and handled. The proposed design principle for DTV antennas is to decrease the total efficiency of the antenna to a level which is just good enough to ensure a sufficient signal-to-noise ratio and that way make the size of the antenna sufficiently small. The limits for the size of broadband capacitive coupling element-based DTV antenna structures inside handsets of different sizes are studied. In the end, a manufactured prototype and simulated design are presented and compared with the limits studied earlier in the paper. The results show that the studied antenna concept is a promising candidate for broadband DTV antennas in mobile terminals. The work also increases general understanding on the implementation of antennas based on the radiation of the finite ground plane.
Steven Klepper - One of the best experts on this subject based on the ideXlab platform.
-
dominance by birthright entry of prior radio producers and competitive ramifications in the u s Television Receiver industry
Strategic Management Journal, 2000Co-Authors: Steven Klepper, Kenneth L SimonsAbstract:The U.S. Television Receiver industry evolved to be an oligopoly dominated by firms that produced radios prior to TVs. Data on the experience of all U.S. radio manufacturers and on the length of survival and rate of innovation of all U.S. TV entrants are collected to analyze how radio experience influenced entry, firm performance, and the evolution of market structure in the TV industry. Consistent with a model of the evolution of an oligopolistic industry, more experienced radio firms were more likely to enter TV manufacturing, had higher innovation rates, and in turn had greater market shares and longer survival, suggesting that firm capabilities and the evolution of the TV industry's market structure were critically shaped by firms' experience prior to entry. Copyright © 2000 John Wiley & Sons, Ltd.
-
The SMS Blackwell Handbook of Organizational Capabilities - Dominance by birthright: entry of prior radio producers and competitive ramifications in the U.S. Television Receiver industry
Strategic Management Journal, 2000Co-Authors: Steven Klepper, Kenneth L SimonsAbstract:The U.S. Television Receiver industry evolved to be an oligopoly dominated by firms that produced radios prior to TVs. Data on the experience of all U.S. radio manufacturers and on the length of survival and rate of innovation of all U.S. TV entrants are collected to analyze how radio experience influenced entry, firm performance, and the evolution of market structure in the TV industry. Consistent with a model of the evolution of an oligopolistic industry, more experienced radio firms were more likely to enter TV manufacturing, had higher innovation rates, and in turn had greater market shares and longer survival, suggesting that firm capabilities and the evolution of the TV industry's market structure were critically shaped by firms' experience prior to entry. Copyright © 2000 John Wiley & Sons, Ltd.
Jari Holopainen - One of the best experts on this subject based on the ideXlab platform.
-
effect of the user s hands on the operation of lower uhf band mobile terminal antennas focus on digital Television Receiver
IEEE Transactions on Electromagnetic Compatibility, 2011Co-Authors: Jari Holopainen, O Kivekas, Clemens Icheln, Janne Ilvonen, Risto Valkonen, P VainikainenAbstract:This paper deals with the effect of the user's hands on the performance of lower UHF-band antennas in handheld terminals. It is studied that how the input impedance, efficiency, and far-field directional pattern of the internal broadband digital Television antenna are affected by the presence of the user's hands. The main part of the study has been carried out by applying finite-difference time-domain simulations. Measurements have been performed to support the results obtained by simulations. In the worst case, as much as 7-11 dB decrease of the antenna efficiency compared to free space case is shown. The results also indicate that the power absorption to the hand(s) is generally a more severe problem for the total efficiency than the change of the matching. On the other hand, it is also shown that in certain cases, the total efficiency of the antenna can even be improved due to the hands of the user. The results of this paper increase the understanding of the effect of the user's hands on the operation of the lower UHF-band antennas, whose operation is based on the radiation of a finite ground plane.
-
internal broadband antennas for digital Television Receiver in mobile terminals
IEEE Transactions on Antennas and Propagation, 2010Co-Authors: Jari Holopainen, O Kivekas, Clemens Icheln, P VainikainenAbstract:The Implementation of internal broadband antennas for digital Television Receiver (DTV) in mobile terminals operating at the lower UHF band is studied comprehensively. Certain challenges such as inherently narrow impedance bandwidth of electrically small antennas and limited volume available for the antennas inside mobile terminals are identified and handled. The proposed design principle for DTV antennas is to decrease the total efficiency of the antenna to a level which is just good enough to ensure a sufficient signal-to-noise ratio and that way make the size of the antenna sufficiently small. The limits for the size of broadband capacitive coupling element-based DTV antenna structures inside handsets of different sizes are studied. In the end, a manufactured prototype and simulated design are presented and compared with the limits studied earlier in the paper. The results show that the studied antenna concept is a promising candidate for broadband DTV antennas in mobile terminals. The work also increases general understanding on the implementation of antennas based on the radiation of the finite ground plane.
O Kivekas - One of the best experts on this subject based on the ideXlab platform.
-
effect of the user s hands on the operation of lower uhf band mobile terminal antennas focus on digital Television Receiver
IEEE Transactions on Electromagnetic Compatibility, 2011Co-Authors: Jari Holopainen, O Kivekas, Clemens Icheln, Janne Ilvonen, Risto Valkonen, P VainikainenAbstract:This paper deals with the effect of the user's hands on the performance of lower UHF-band antennas in handheld terminals. It is studied that how the input impedance, efficiency, and far-field directional pattern of the internal broadband digital Television antenna are affected by the presence of the user's hands. The main part of the study has been carried out by applying finite-difference time-domain simulations. Measurements have been performed to support the results obtained by simulations. In the worst case, as much as 7-11 dB decrease of the antenna efficiency compared to free space case is shown. The results also indicate that the power absorption to the hand(s) is generally a more severe problem for the total efficiency than the change of the matching. On the other hand, it is also shown that in certain cases, the total efficiency of the antenna can even be improved due to the hands of the user. The results of this paper increase the understanding of the effect of the user's hands on the operation of the lower UHF-band antennas, whose operation is based on the radiation of a finite ground plane.
-
internal broadband antennas for digital Television Receiver in mobile terminals
IEEE Transactions on Antennas and Propagation, 2010Co-Authors: Jari Holopainen, O Kivekas, Clemens Icheln, P VainikainenAbstract:The Implementation of internal broadband antennas for digital Television Receiver (DTV) in mobile terminals operating at the lower UHF band is studied comprehensively. Certain challenges such as inherently narrow impedance bandwidth of electrically small antennas and limited volume available for the antennas inside mobile terminals are identified and handled. The proposed design principle for DTV antennas is to decrease the total efficiency of the antenna to a level which is just good enough to ensure a sufficient signal-to-noise ratio and that way make the size of the antenna sufficiently small. The limits for the size of broadband capacitive coupling element-based DTV antenna structures inside handsets of different sizes are studied. In the end, a manufactured prototype and simulated design are presented and compared with the limits studied earlier in the paper. The results show that the studied antenna concept is a promising candidate for broadband DTV antennas in mobile terminals. The work also increases general understanding on the implementation of antennas based on the radiation of the finite ground plane.
