Zobrazeno 1 - 10
of 43
pro vyhledávání: '"F.G. Willwerth"'
Publikováno v:
2017 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium).
This paper describes a method for determining the complex polarization ratio using two identical, linearly polarized antennas. By Fourier transform analysis of S 21 measurements with one of the antennas rotating about its axis a circular polarization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1ab90a2128153f3c1c5a6b8dd3f5b66
https://doi.org/10.1109/usnc-ursi.2017.8074894
https://doi.org/10.1109/usnc-ursi.2017.8074894
Publikováno v:
2011 IEEE International Symposium on Antennas and Propagation (APSURSI).
An omnidirectional colinear microstrip array antenna is modeled as a ladder network. A formula is derived for the maximum directivity of a series-fed colinear antenna with an infinite number of ladder sections. It is shown that the maximum directivit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db29b908a73ec62a85dcf7fd63b1858f
https://doi.org/10.1109/aps.2011.5996534
https://doi.org/10.1109/aps.2011.5996534
Publikováno v:
2010 IEEE International Symposium on Phased Array Systems and Technology.
The measured results from an X-band electronically scanned array using an overlapped subarray architecture are presented. The 2D architecture uses a 12×12 element subarray with 3 to 1 overlapping. The active electronic scanned array is a receive onl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50f41f694bd7890fc44fe46fb47c6220
https://doi.org/10.1109/array.2010.5613285
https://doi.org/10.1109/array.2010.5613285
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 39:798-808
The authors explore two ideas for effectively achieving channel equalization within the framework of a narrowband sidelobe canceler. The first approach relies primarily on digital equalization to enhance conventional sample matrix inversion (SMI) per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::325b292c96fa6ba4259d9f353b3df8fe
https://doi.org/10.1109/22.79107
https://doi.org/10.1109/22.79107
Publikováno v:
IEEE Transactions on Antennas and Propagation. 39:1305-1311
A model for simulating the performance of a phased-array antenna with one-dimensional near-field scanning is addressed. Measurements and simulations in the reactive near-field region for a linear array with monopole elements are described. The array
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b606100e9c510399d125067f45b8d1c0
https://doi.org/10.1109/8.99038
https://doi.org/10.1109/8.99038
Publikováno v:
IEEE International Symposium on Phased Array Systems and Technology, 2003..
Future naval radars will perform a combination of functions including volume search, track, and high resolution imaging. These radars, which must operate in littoral regions (i.e., near coastlines), will need to contend with strong clutter and jammin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a756e4df724f2aad897a105aa44fcd7
https://doi.org/10.1109/past.2003.1256966
https://doi.org/10.1109/past.2003.1256966
Publikováno v:
IEEE Antennas and Propagation Society Symposium, 2004..
A technique is presented for determining the insertion phase of phased array elements from time-domain spectra. It is shown that the inverse discrete Fourier transform (IDFT), commonly used in obtaining a time-domain spectrum, yields unreliable phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09ac66206cf2b775a9e5a2ed7dde8f54
https://doi.org/10.1109/aps.2004.1330248
https://doi.org/10.1109/aps.2004.1330248
Autor:
H.M. Aumann, F.G. Willwerth
Publikováno v:
Proceedings of the IEEE National Radar Conference.
A phased-array focusing technique is described that results in far-field antenna patterns being formed at distances as close as one array diameter. This will allow experimental verification of adaptive-array far-field performance in an anechoic chamb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c881ecb7f3a06833e0aa67fc16895cf5
https://doi.org/10.1109/nrc.1989.47624
https://doi.org/10.1109/nrc.1989.47624
Autor:
H.M. Aumann, F.G. Willwerth
Publikováno v:
Proceedings of the 1988 IEEE National Radar Conference.
Low sidelobe performance in a small, active phased array requires very tight amplitude and phase tolerances in the transmit/receive (T/R) modules and beamforming network. An L-band T/R module is described in which the required precision is realized t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74332be9ee6af9f2aaa5f10535732d12
https://doi.org/10.1109/nrc.1988.10926
https://doi.org/10.1109/nrc.1988.10926
Autor:
H.M. Aumann, F.G. Willwerth
Publikováno v:
IEEE Antennas and Propagation Society International Symposium. 1995 Digest.
A technique to compensate for differences in phased array element patterns is presented. Each measured element pattern is approximated by a virtual array whose excitation function is determined by the Woodward-Lawson synthesis technique. By extending
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4382899659486e60560d5b116f100d07
https://doi.org/10.1109/aps.1995.530167
https://doi.org/10.1109/aps.1995.530167