Measured performance of matched dielectric lenses

Autor: E. M. T. Jones, T. Morita, S. B. Cohnf
Rok vydání: 1956
Předmět:
Zdroj: IRE Transactions on Antennas and Propagation. 4:31-33
ISSN: 0096-1973
DOI: 10.1109/iretap.1956.6366294
Popis: Two microwave lenses whose surfaces have been matched respectively by embedded capacitive walls and by simulated quarter-wave transformers were built and compared experimentally to an unmatched lens of identical aperture and focal length. At the design frequency, the matched lenses exhibited reductions in side-lobe level of 14 and 10 db with respect to the unmatched lens, and increases in over-all gain of 0.35 and 0.1 db. The input vswr of the feed horn was reduced from 1.6 for the unmatched case to 1.02 and 1.05 for the matched cases. The bandwidth of good performance for the two lenses ranged from lo per cent to at least 44 per cent
Databáze: OpenAIRE