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pro vyhledávání: '"T. L. Roach"'
Autor:
T. L. Roach, Jennifer T. Bernhard
Publikováno v:
IEEE Transactions on Antennas and Propagation. 64:5441-5446
Pattern reconfigurable antennas implemented in small adaptive arrays can serve as practical solutions in applications, which are limited by available platform space while providing additional degrees of pattern control. This communication integrates
Autor:
Jennifer T. Bernhard, T. L. Roach
Publikováno v:
Electromagnetics. 29:384-392
In classical periodic phased arrays, designers use the amplitude and phase of identical array elements to achieve desired characteristics such as sidelobe level, main beamwidth, scan angle, etc. A phased array composed of individual pattern-reconfigu
Publikováno v:
Microwave and Optical Technology Letters. 49:535-539
This study investigates the performance of planar fixed and/or pattern reconfigurable antennas on a model laptop in terms of diversity gain and spatial coverage. The reconfigurable antenna used in this work has the ability to change its radiation pat
Publikováno v:
AHS
In this work, applications involving a radiation reconfigurable antenna are presented and discussed. The antenna is capable of reconfiguring its radiation pattern from broadside to endfire over a common impedance bandwidth. After outlining the operat
Autor:
Debabani Choudhury, Gregory H. Huff, Jennifer T. Bernhard, Helen K. Pan, B. Bangerter, Vijay K. Nair, T. L. Roach, Yorgos Palaskas, Stefano Pellerano, Parmoon Seddighrad
Publikováno v:
2007 IEEE Antennas and Propagation Society International Symposium.
This paper presents a pattern/polarization reconfigurable single turn square spiral microstrip antenna that is designed to operate in the 5 GHz indoor band and tested with Intel-developed CMOS MIMO transceivers. Experimental results show that differe
Autor:
T. L. Roach, Gregory H. Huff
Publikováno v:
2007 IEEE Antennas and Propagation Society International Symposium.
This work covers the design and experiment of a finite-ground stripline-based spiral antenna with a Dyson-style balun and feed network (including broadband impedance transformer) that have been integrated into a multi-layer (via-free) structure. The
Autor:
Jennifer T. Bernhard, T. L. Roach
Publikováno v:
2007 IEEE Antennas and Propagation Society International Symposium.
The present work focuses on the effects of reconfigurability between broadside and tilted patterns at each array element on the sidelobe performance of linear phased arrays.
Publikováno v:
MILCOM 2006.
The use of multiple antenna systems (MIMO, etc.) and signal combining techniques (Maximal Ratio, Spatial, etc.) can create significant advantages in situations requiring a high degree of system agility. Furthermore, the ability to resolve coherent in