Accession Number:

ADA112607

Title:

On the Effect of Substrate Thickness and Permittivity on Printed Circuit Dipole Properties.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV LOS ANGELES INTEGRATED ELECTROMAGNETICS LAB

Personal Author(s):

Report Date:

1981-12-01

Pagination or Media Count:

35.0

Abstract:

The effect of substrate thickness and relative permittivity on the radiation properties of printed circuit dipoles PCDs is investigated. A trade-off between substrate thickness and resonant input resistance, bandwidth and radiation efficiency is presented for a PTFE glass random fiber substrate. It is found that for a fixed substrate thickness B, the resonant length and directivity decrease with increasing relative dielectric constant epsilon sub r. The E-plane normalized power pattern is also examined as a function of epsilon sub r and B. It is shown that even for very thin substrates, multiple beam radiation can result for certain values of epsilon sub r by the excitation of surface waves. Multiple beam patterns can also be obtained with increasing B for a given epsilon sub r. In fact, as B increases it is determined that the resonant length, bandwidth and resonant resistance approach the apparent value of a PCD on a dielectric half space. Author

Subject Categories:

  • Line, Surface and Bulk Acoustic Wave Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE