EXPERIMENTAL COMPARISON OF SHUNT- AND SERIES-EXCITATION OF A HIGH, UNIFORM CROSS-SECTION, VERTICAL RADIATOR

1939 ◽  
Vol 17a (12) ◽  
pp. 227-236
Author(s):  
K. A. MacKinnon
Keyword(s):  
Field Strength ◽  
Cross Section ◽  
Experimental Comparison ◽  
Similar Work ◽  
Uniform Cross Section ◽  
Remote Points

This paper presents the results of experiments with shunt- and series-excitation of a 0.55 wave, uniform cross-section, vertical radiator. Both unattenuated field strength at one mile and fading characteristics at remote points were determined for each mode of excitation. Whilst Morrison and Smith have already done similar work with a non-uniform cross-section tower, this is the first attempt to examine the fading of a uniform cross-section tower excited in the two modes.

SOME CALCULATIONS OF FIELD STRENGTH DISTRIBUTION IN THE VERTICAL PLANE OF DOUBLE-TAPERED MASTS

1935 ◽  
Vol 13a (3) ◽  
pp. 60-71
Author(s):  
K. A. MacKinnon
Keyword(s):  
Field Strength ◽  
Cross Section ◽  
Current Distribution ◽  
Vertical Plane ◽  
Field Measurements ◽  
Strength Distribution ◽  
The Self ◽  
Uniform Cross Section ◽  
The Cross

The approximate current distribution with height in vertical tower antennae of non-uniform cross section is calculated by assuming that the cross section is that of a cylinder whose diameter changes discontinuously. The field strength distribution in the vertical plane is then calculated for this current distribution and compared with field measurements of Ballantine. This is repeated using the experimentally determined current distribution of Gihring and Brown which results in a much closer check with Ballantine's measurements.The results were then used to calculate the field strength distribution in the vertical plane of an array comprising a 0.597λ vertical double-tapered tower as radiator, and a 0.250λ vertical tower of the self-supporting type as a fed reflector.

A STUDY ON THE SQUEAL OF A DRUM BRAKE WHICH HAS SHOES OF NON-UNIFORM CROSS-SECTION

2001 ◽  
Vol 240 (5) ◽  
pp. 789-808 ◽  
Author(s):  
J.M. LEE ◽  
S.W. YOO ◽  
J.H. KIM ◽  
C.G. AHN
Keyword(s):  
Cross Section ◽  
Drum Brake ◽  
Uniform Cross Section

Deflection of Beams of Varying Cross Section

1937 ◽  
Vol 4 (2) ◽  
pp. A49-A52
Author(s):  
Miklós Hetényi
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Original Problem ◽  
New Method ◽  
Constant Cross Section ◽  
Deflection Curve ◽  
Force System ◽  
Uniform Cross Section ◽  
The Cross

Abstract This paper calls attention to a new method of dealing with deflections of beams, the cross sections of which vary by steps. It is shown that the effect of this variation on the shape of the deflection curve can be represented by a properly chosen force system acting on a beam of uniform cross section. There is no approximation involved in this substitution, whereby the original problem is reduced to one of computing deflections of beams of constant cross section.

Effects of the wall curvature on the flow in a duct of uniform cross-section

2004 ◽  
Vol 167 (3-4) ◽  
pp. 123-130 ◽  
Author(s):  
M. E. Erdogan ◽  
C. E. Imrak
Keyword(s):  
Cross Section ◽  
Uniform Cross Section
Sign in / Sign up

Export Citation Format

Share Document