Accession Number:

AD0296954

Title:

A NONUNIFORMLY DISTRIBUTED PARAMETER MATCHING NETWORK FOR THE MICROWAVE FREQUENCIES

Descriptive Note:

Corporate Author:

ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s):

Report Date:

1963-01-01

Pagination or Media Count:

40.0

Abstract:

A nonuniform section of coaxial transmission line is investigated as an impedance matching network. Assuming that the purity of the dominant transverse electromagnetic TEM mode is maintained, the coaxial transformer section proposed is one in which the distributed series inductance and shunt capacitance are prescribed mathematical functions of the axial cylindrical coordinate, that is, the direction of propagation. These variations are expressed as a variable characteristic impedance in the explicit form of a halfperiod cosinusoidal distribution. Starting with the appropriate differential equations for the nonuniform line voltages and currents, the basic Riccati-type differential equation governing the reflection coefficient in a nonuniform section is presented. In a conventional manner, an expression is then developed for the complex reflection coefficient at the input reference plane when the output port is terminated in a matched load. For given ranges in design parameters the magnitude of this integral expression is evaluated for this specific taper-cosinusoidal. The integration was performed on a Burroughs Datatron 205 computer using a Gaussian quadrature technique.

Subject Categories:

  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE