McGraw-Hill-Dictionary of ELECTRICAL AND ELECTRONIC ENGINEERING, 1984.
An antenna is a structures, usually from a good conducting material that has been designed to have a shape and size such that it will radiate electromagnetic power in an efficient manner.
R.E. Collin, Antenna and Radiowave Propagation, McGraw-Hill, 1985, p-13.
Electromagnetics field vector E and H in term of all the sources causing these radiating fields, but at points far removed from the sources. The collection of sources is called an antenna and the formulars to be derived form the basis for what is generally refered to as antenna pattern analysis and synthesis.
R. S. Elliott, Antenna Theoory and Design, revised edition, John Wiley & Sons, copyright 2003 IEEE, p-3.
A radio antenna may be defined as structure associated with region of transition between a guided wave and free-space wave, or vice vesa.
J. D. Kraus and R. J. Marhefka, Antennas, 3rd edition, McGraw-Hill, 2003, p-12.
The antenna is the transitional structure between free-space and guiding device.
C. A. Balanis, Antenna theory, John Wiley & Sons, 2005, p-1.
An antenna, as an essential part of a radio system, is defined as a device which can radiate and recieve electromagnetic energy in an efficient and desire manner.
Y. Huang and K. Boyle, Antennas, John Wiley & Sons, 2008, p-4.
วิเศษ ศักดิ์ศิริ (Wiset Saksiri), Luxembourg, 2008.
