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Parallel Transmission Line Antenna

IP.com Disclosure Number: IPCOM000078627D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Smith, AA: AUTHOR [+2]

Abstract

This antenna is arranged to produce a uniform electromagnetic field in a region of space. The main components of the electromagnetic field are a vertical electric field E and a horizontal magnetic field H. The field propagates in a direction normal to the E and H components.

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Parallel Transmission Line Antenna

This antenna is arranged to produce a uniform electromagnetic field in a region of space. The main components of the electromagnetic field are a vertical electric field E and a horizontal magnetic field H. The field propagates in a direction normal to the E and H components.

This antenna is similar in some respects to one published in an article in the IBM Technical Disclosure Bulletin, Vol. 15, No. 3, (August 1972) page 973, entitled "Circular Antenna for Electromagnetic Susceptibility Testing". However, this parallel antenna differs in that, since the current flow is in the same direction in both conductors, it tends to enhance the horizontal magnetic field while suppressing the vertical magnetic field, thereby more closely simulating fields from broadcasting stations. Also, this antenna has approximately double the frequency range since the transmission lines are approximately half the length, as compared to the circular design of the same overall dimension.

The parallel transmission line antenna consists of two parallel wires, a ground plane, a signal generator and two load resistors. The two parallel wires are placed above the ground plane and driven at one end by a common signal generator, which is connected between the ground plane and the wires. The end of each wire is terminated to the ground plane with a load resistor, which has a valve approximately equal to the characteristic impedance of the transmission line.

In op...