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Optimum beamforming using transmit antenna arrays
1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363), 2003Transmit beamforming is a powerful means of increasing capacity in systems in which the transmitter is equipped with an antenna array, especially in systems in which receive beamforming is not available, as is typical in the base-to-mobile downlink in a cellular communication system.
E. Visotsky, U. Madhow
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Power Spreading in Distributed Transmit Antennas
2010 6th International Conference on Wireless Communications Networking and Mobile Computing (WiCOM), 2010In distributed antenna system (DAS), delay spreads between the receiver and each transmit antenna are different due to the unequal propagation delays from distributed transmit antennas to mobile receivers. To exploit the merit of DAS, power spreading in distributed transmit antennas is proposed for OFDM-based MIMO systems over frequency-selective ...
Lu Guan +4 more
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Modeling of VLF valley transmitting antenna
2009 3rd IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009Method of modeling very low frequency (VLF) valley transmitting antenna is introduced. According to method of moment (MOM) the top load hat, the downlead line, the feed cage, the ground system and other parts of the antenna are built their model. Some particular skills are introduced to improve the model's validity.
Yujun Liang, Zhigang Zhang
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Ring Charges on Biconical Transmitting Antennas
Electromagnetics, 1987ABSTRACT The arm-cap Junction of a biconical antenna supports a ring charge, the value of which is calculable in an electromagnetically exact way. The field intensity Just off its surface Is singular but integrable. Charge values are calculated Using conservation of charge and Causa' law.
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The imperfectly conducting cylindrical transmitting antenna
IEEE Transactions on Antennas and Propagation, 1966The properties of a cylindrical antenna with a continuous ohmic resistance along its length are of interest in the design of certain types of directive broadband antennas and in the determination of the efficiency of dipole antennas. Conventionally, the contribution by ohmic resistance to the distribution of current and the impedance is contained in a ...
R. King, T. Wu
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The Beamed Power Microwave Transmitting Antenna
IEEE Transactions on Microwave Theory and Techniques, 1978The potential applications, resulting hazards, safety considerations, and alternate options for high-power microwave beam transmission functions are discussed. Existing and projected beamed power control techniques are presented, and the differences between existing and proposed high-power conventional antennas and phased arrays are described.
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An overview of terahertz antennas
China Communications, 2020Yejun He, Long Zhang, Zhi Ning Chen
exaly