Results 221 to 230 of about 3,149 (257)

The resonant cylindrical dielectric cavity antenna

IEEE Transactions on Antennas and Propagation, 1983
An experimental investigation of the radiation and circuit properties of a resonant cylindrical dielectric cavity antenna has been undertaken. The radiation patterns and input impedance have been measured for structures of various geometrical aspect ratios, dielectric constants, and sizes of coaxial feed probes.
S. Long, M. McAllister, null Liang Shen
openaire   +1 more source

Resonances in a Cylindrical Plasma Column (Correspondence)

IEEE Transactions on Microwave Theory and Techniques, 1962
A plasma column irradiated by an electromagnetic wave which has its electric vector and direction of propagation perpendicular to the axis of the tube exhibits Tonks-Dattner resonances in its absorption pattern when the electron density in the column is varied.
J. Willis, I. Petroff
openaire   +1 more source

Resonant response of orthotropic cylindrical shells

Journal of Sound and Vibration, 1977
Abstract The resonant response of simply supported, thin and thick, orthotropic cylindrical shells is determined by using modal analysis, for three levels of hysteretic damping. This response is significantly changed if the larger of the elastic constants associated with normal stresses refers to the meridional, instead of the circumferential ...
Warburton, G. B., Soni, S. R.
openaire   +1 more source

The analog of the Kanazawa-Gordon formula for cylindrical resonators

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2004
In this paper, a formula relating the shift in the resonant frequency of a shear piezoceramic cylindrical resonator to the viscosity of a Newtonian liquid that loads the resonator surface was established. This formula is analogous to the classical Kanazawa-Gordon formula that describes the change in the resonant frequency of a shear planar resonator ...
openaire   +2 more sources

Resonance in a cylindrical-triangular microstrip structure

IEEE Transactions on Microwave Theory and Techniques, 1997
Full-wave solutions for the complex-resonant frequency of a triangular microstrip patch printed on a cylindrical substrate are presented. Curvature effects on the complex-resonant frequency, as well as the quality factor of the cylindrical-triangular microstrip structure, are analyzed. Measured resonant frequencies are also shown for comparison.
null Kin-Lu Wong, null Shan-Cheng Pan
openaire   +1 more source

Some Results on Cylindrical Cavity Resonators

Bell System Technical Journal, 1947
Certain hitherto unpublished theoretical results on cylindrical cavity resonators are derived. These are: an approximation formula for the total number of resonances in a circular cylinder; conditions to yield the minimum volume circular cylinder for an assigned Q; limitation of the frequency range of a tunable circular cylinder as set by ambiguity ...
J. P. Kinzer, I. G. Wilson
openaire   +1 more source

A Composite, Multilayered Cylindrical Dielectric Resonator

MTT-S International Microwave Symposium Digest, 2005
The analysis of TE modes in a composite multilayered cylindrical dielectric resonator is presented. All cylindrical dielectric resonator structures which have found some practical applications can be treated as a special case of the structure under consideration. These include: single resonator, double resonator, ring resonator, resonator in microstrip,
S. Maj, M. Pospieszalski
openaire   +1 more source

Cylindrical Antenna in Uniaxial Resonant Plasmas

Radio Science, 1969
The current distribution and the input admittance of a cylindrical antenna immersed in two types of uniaxial resonant plasmas are treated in this paper as boundary value problems. It is first indicated that the Hallen type integral equation approach is not suitable, since it does not describe the actual physical phenomenon closely. The method used here
openaire   +1 more source

Performance and characteristics of cylindrical resonator igniters

AIAA Journal, 1991
The objective of this study was to improve the performance of the original resonator by eliminating its operational dependence on the jet pressure ratio, and to find the conditions required for maximum pressure amplitudes through a detailed parametric study our parameters were studiedn namely the disk diameter, the cylindrical chamber width, and disk ...
R. A. Neemeh, M. N. Elabdin
openaire   +1 more source

Size-Independent Cylindrical Wheel Resonator

IEEE Antennas and Wireless Propagation Letters, 2013
A metallic cavity resonator in the shape of a circular cylinder is considered in the phasor domain. The resonator is filled with an even number of geometrically equal wedge-shaped sectors whose common edge is the cylinder axis. The sectors contain alternating double-positive (DPS) and double-negative (DNG) materials that are isoimpedance and anti ...
openaire   +1 more source