PART II. A GENERAL METHOD FOR CALCULATING THE IMPEDANCE OF AN ANTENNA IN A WAVE GUIDE OF ARBITRARY CROSS SECTION

1949 ◽  
Vol 27a (4) ◽  
pp. 91-100
Author(s):  
A. F. Stevenson
Keyword(s):  
Cross Section ◽  
Arbitrary Cross Section ◽  
Wave Guide ◽  
General Method

not available

CONTRIBUTIONS TO THE THEORY OF WAVE GUIDES

1949 ◽  
Vol 27a (4) ◽  
pp. 69-69 ◽  
Author(s):  
L. Infeld ◽  
J. R. Pounder ◽  
A. F. Stevenson ◽  
W. Z. Chien ◽  
J. L. Synge
Keyword(s):  
Cross Section ◽  
General Problem ◽  
Radiation Resistance ◽  
Arbitrary Cross Section ◽  
Point Of View ◽  
Wave Guide ◽  
Linear Antenna ◽  
Rectangular Wave ◽  
Point Of Entry ◽  
Wave Guides

Part I deals with the problem of determining the field due to a source of radiation inside a semi-infinite rectangular wave guide closed at one end by a plug, the current distribution in the source being regarded as known. Both the walls of the guide and the plug are treated as being perfectly conducting. Three different methods of solving the problem are given. The radiation resistance is then deduced from energy considerations. In particular, an expression for the radiation resistance of a linear antenna perpendicular to the wider face of the plug, fed at the point of entry, is derived, it being assumed that the antenna current is sinusoidal and that only the fundamental H-wave is transmitted by the guide.In Part II, one of the methods of paper I is extended to the case of a guide of arbitrary cross section, and the general problem of the calculation of radiation resistance and reactance is discussed.In Part III, a number of formulae for the radiation resistance of antennae of various shapes, with various assumed current distributions, in rectangular and circular guides, are given.In Part IV, explicit calculations for the impedance of a linear antenna in a rectangular wave guide are given. Further numerical calculations relating to the same problem, from the point of view of matching and sensitivity, have been made by Messrs. Chien and Pounder, but are not reproduced here.

Flow in the Hydrodynamic Entrance Region of Ducts of Arbitrary Cross Section

1969 ◽  
Vol 91 (3) ◽  
pp. 345-354 ◽  
Author(s):  
David P. Fleming ◽  
E. M. Sparrow
Keyword(s):  
Experimental Data ◽  
Velocity Field ◽  
Pressure Drop ◽  
Cross Section ◽  
Cross Sections ◽  
Solution Method ◽  
Arbitrary Cross Section ◽  
Entrance Region ◽  
General Method ◽  
Good Agreement

A general method of analysis is presented for determining the developing velocity field and pressure drop for laminar flow in the entrance region of ducts having arbitrary cross sections. Application of the solution method is made to rectangular ducts and to triangular ducts. Available experimental data are compared with the analytical results and good agreement is found to prevail. Development characteristics for six ducts are brought together and compared, and various trends are identified.

Computation of waveguide modes for waveguides of arbitrary cross-section

1990 ◽  
Vol 137 (2) ◽  
pp. 145 ◽  
Author(s):  
C.Y. Kim ◽  
S.D. Yu ◽  
R.F. Harrington ◽  
J.W. Ra ◽  
S.Y. Lee
Keyword(s):  
Cross Section ◽  
Arbitrary Cross Section ◽  
Waveguide Modes
Sign in / Sign up

Export Citation Format

Share Document