Results 151 to 160 of about 506,346 (193)
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Journal of Optics, 1994
In the paper diffraction theory is applied to obtain the field received by an aperture in the parallel-plate region of a Rotman lens when the outer arc of the lens is excited with arbitrary phase and amplitude distributions. It has been found that the receiving aperture does not detect the maximum power when it is located upon the nominal focus, it is ...
J L Cruz, B Gimeno, E A Navarro, V Such
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In the paper diffraction theory is applied to obtain the field received by an aperture in the parallel-plate region of a Rotman lens when the outer arc of the lens is excited with arbitrary phase and amplitude distributions. It has been found that the receiving aperture does not detect the maximum power when it is located upon the nominal focus, it is ...
J L Cruz, B Gimeno, E A Navarro, V Such
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An implemented non-focal Rotman lens
2015 European Microwave Conference (EuMC), 2015Rotman lens is a feed network which has many applications in the field of phased array antennas. Dealing with the phase error is very important in Rotman lens design process. Designing Rotman lens using a non-focal idea has been done recently where the phase error is just reduced by optimizing the port positions. The method cannot be constructed easily
Mojtaba Rajabalian, Bijan Zakeri
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Characterization of the dispersion of a Rotman lens
Digest on Antennas and Propagation Society International Symposium, 2003The dispersion of a Rotman lens is quantified by the distortion that a particular Rotman lens would introduce into various pulses. The lens is characterized by broadband measurement of its transfer function. Then this function is numerically applied to the spectrum of a simulated pulse.
V.K. Tripp, J.E. Tehan, C.W. White
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2017 47th European Microwave Conference (EuMC), 2017
This paper presents the ongoing work of designing, simulating and measuring a 3D printed, broadband 6–18GHz double ridged waveguide (WRD) Rotman lens. In order to achieve a wide bandwidth with +/−30 degrees scan range, five different input ports were carefully designed.
Karina Vieira Hoel +3 more
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This paper presents the ongoing work of designing, simulating and measuring a 3D printed, broadband 6–18GHz double ridged waveguide (WRD) Rotman lens. In order to achieve a wide bandwidth with +/−30 degrees scan range, five different input ports were carefully designed.
Karina Vieira Hoel +3 more
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Proceedings of the 1997 IEEE National Radar Conference, 2002
A millimeter wave Rotman lens was developed that operates at frequencies between 33 GHz and 37 GHz with the potential of being implemented in metallized plastic. Various lens designs were evaluated with a computer model based on the contour integral method.
E.O. Rausch, A.F. Peterson, W. Wiebach
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A millimeter wave Rotman lens was developed that operates at frequencies between 33 GHz and 37 GHz with the potential of being implemented in metallized plastic. Various lens designs were evaluated with a computer model based on the contour integral method.
E.O. Rausch, A.F. Peterson, W. Wiebach
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Scaling and focusing of the Rotman lens
IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229), 2002With a high dielectric material, the size of the Rotman lens (see Rotman, W. and Turner, R.F., 1963) can be reduced by a factor of /spl radic/(/spl epsiv//sub r/). Its design equations and scaling factor can be modified and defined according to the dimensions and materials of the lens and lines.
null Jaeheung Kim, F. Barnes
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IEEE Microwave and Wireless Components Letters, 2005
A new form of a Rotman lens has been proposed for applications above 10 GHz, such as a collision avoidance radar. The proposed lens can be described as a dielectric slab fed by slot lines. The new form is expected to show lower loss and lower mutual coupling than the conventional Rotman lenses at higher frequency than 10 GHz.
null Jaeheung Kim +2 more
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A new form of a Rotman lens has been proposed for applications above 10 GHz, such as a collision avoidance radar. The proposed lens can be described as a dielectric slab fed by slot lines. The new form is expected to show lower loss and lower mutual coupling than the conventional Rotman lenses at higher frequency than 10 GHz.
null Jaeheung Kim +2 more
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2005 IEEE Antennas and Propagation Society International Symposium, 2005
Traditional Rotman lenses can be designed using mathematical formulations (Rotman, W. and Turner, R.F., 1963; Gagnon, D.R., 1989; Hansen, R.C., 1991). The design equations, however, do not specify the shape of the sidewall that joins the lens focal ports to the lens array ports, and while they specify the port locations they do not specify the port ...
E.O. Rausch, A.F. Peterson
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Traditional Rotman lenses can be designed using mathematical formulations (Rotman, W. and Turner, R.F., 1963; Gagnon, D.R., 1989; Hansen, R.C., 1991). The design equations, however, do not specify the shape of the sidewall that joins the lens focal ports to the lens array ports, and while they specify the port locations they do not specify the port ...
E.O. Rausch, A.F. Peterson
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Rotman Lens in Microstrip Technology
22nd European Microwave Conference, 1992, 1992A microwave lens of Rotman type, to be used in a broadband multibeam antenna, has been designed in microstrip technology. The method of analysis used, based on a ray approach, is briefly described and compared for a circular geometry with a, in some respect, rigorous method. The design of a Rotman lens with 15 beam ports and 15 antenna element ports is
Borje Carlegrim, Lars Pettersson
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2008 IEEE Antennas and Propagation Society International Symposium, 2008
The geometric optics based RLD produced impressive initial results. This fast and accurate design tool generates good first-cut designs that can serve as a starting point in more computationally intensive EM codes. The measured results validated the RLD simulations. Finally, the effect of introducing a bend in the beamformer was empirically studied and
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The geometric optics based RLD produced impressive initial results. This fast and accurate design tool generates good first-cut designs that can serve as a starting point in more computationally intensive EM codes. The measured results validated the RLD simulations. Finally, the effect of introducing a bend in the beamformer was empirically studied and
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