Periodically Loaded Straight Wires for Radio Wave Transmission Control

• Published in: IEEE transactions on antennas and propagation Vol. 59; no. 1; pp. 328 - 332
• Main Authors: Iigusa, K, Harada, H, Kato, S, Hirokawa, J, Ando, M
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-01-2011; Institute of Electrical and Electronics Engineers
• Subjects: Antennas; Applied sciences; Dipole antennas; electromagnetic shielding; Exact sciences and technology; loaded scatters; Loading; Radiocommunications; Receiving antennas; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Transmitting antennas; Varactors; Voltage control; Wires; Electronic control; Radio wave; Dipole antennas; Electromagnetic shielding; Dipole antenna; Information transmission; Reactance; Wave transmission; Varactor diode; varactors; Plane wave; Current distribution; Radio transmission; Frequency response; loaded scatters
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2010.2090488

Calculating current distributions along conducting straight wires reveals that the electric influence of the wires is more effectively reduced by loading reactances than it is by disconnecting the loading ports. With the electric influence almost eliminated, a sheet consisting of reactively loaded straight wires can almost perfectly transmit a radio wave of a frequency determined by the interval between the loading ports and the reactance value. The frequency responses of radio wave transmissions for a normal incident plane wave are numerically calculated, and it is shown that by controlling the reactance value, the transmission can be changed more than 30 dB. Thus, a sheet by which radio wave transmission can be electronically controlled is proposed, and its operation is experimentally examined.