Time Domain Characterization of Circularly Polarized Ultrawideband Array

Autor:	Adrian Eng-Choon Tan, Karumudi Rambabu, Michael Yan-Wah Chia
Rok vydání:	2010
Předmět:	Physics business.industry Linear polarization Axial ratio Near and far field Polarization (waves) Antenna array Optics Time domain Electrical and Electronic Engineering business Circular polarization Computer Science::Information Theory Group delay and phase delay
Zdroj:	IEEE Transactions on Antennas and Propagation. 58:3524-3531
ISSN:	1558-2221 0018-926X
DOI:	10.1109/tap.2010.2071369
Popis:	The transmitted signal by a circularly polarized ultrawideband (CP-UWB) array is a short pulse of circularly rotating E-field vector in time domain. A mathematical model is derived for a transmitted pulse radiated by a CP-UWB array antenna. To validate the model, an array of four sequentially rotated ridged horns is constructed, and the transmitted pulse is measured in time domain. The measurement is done with a linearly polarized antenna in far-field, for different rotational angles. The E-field vector transmitted by the CP-UWB array is constructed with the measured time-domain pulses. The measured pulse is compared with the derived pulse for validation. Both measured and derived pulses are compared for various parameters such as the CP-UWB array's sense of polarization, axial ratio, gain and phase difference between orthogonal signals.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0f08f5bbefbd49d6af1db1e6967e1318 https://doi.org/10.1109/tap.2010.2071369 Zobrazit plný text záznamu