An improved design method of Rotman lens antennas

Katagi, Takashi; Mano, Seiji; Sato, Shogo; Tahara, Shoichi; Tomimatsu, E.

doi:10.1109/tap.1984.1143353

Cited by 79 publications

(29 citation statements)

References 1 publication

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“…Table I show the direction of main beam, side lobe level and beam width for the Merent lenses. Lens obtained using the approach suggested in [3] covering an angular area of f32O, which is close to the design value. In view of the geometrical symmetry of the lens results for only half of the input ports are shown here…”

Section: Resultssupporting

confidence: 73%

Comparison of the performance of the Rotman type lenses obtained by different design approaches

Singhal

Sharma²,

Gupta³

Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure'

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Section: Resultssupporting

confidence: 73%

Comparison of the performance of the Rotman type lenses obtained by different design approaches

Singhal

Sharma²,

Gupta³

Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure'

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“…When the number of output ports increases, the phase error will also arose. Researchers have proposed several methods to reduce the phase error [16][17][18][19][20]. In the published work by Dong [19] at 2010, a non-focal method for designing and optimising the phase error has been reported.…”

Section: Introductionmentioning

confidence: 99%

“…However, in other ports, the phase error occurs. Many methods are introduced to reduce the error [16][17][18]. Rotman lens by using four focal ports has zero phase error that is ideal to 3D phased array radars.…”

Section: Introductionmentioning

confidence: 99%

Optimisation and implementation for a non‐focal Rotman lens design

Rajabalian¹,

Zakeri

2015

IET Microwaves, Antennas & Propagation

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Rotman lens is widely used to feed a phased array antenna to implement a beam forming network. In designing Rotman lens, one of the most important challenges is the phase error. In recent years, Rotman lens has been designed by using a non-focal idea whereas the position of ports are only optimised to reduce the phase error. Because of the unsuitable location of the ports, which causes mismatching and coupling, the previous non-focal method cannot be constructed easily. To implement the lens, a new scheme, converting three-focal Rotman lens to non-focal, is presented. By using a simple procedure, the phase error is properly reduced. To evaluate the proposed method, the non-focal Rotman lens has been implemented at 10 GHz. The simulation and measurement results illustrate that the method is implementable. Furthermore, the average improvement of the maximum phase error in the proposed lens, with five beam ports and five array ports with overall lens size of 15 × 15 cm 2 , is 36% better than the previous reported work.

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“…Other canonical focal curves have been investigated, including elliptical [9,10] and hyperbolic [11] curves. An integral method was proposed in [12] to find an optimal focal curve introducing the ratio between a beam pointing angle and the angular position of the corresponding feed as an additional design parameter. An analytical formula is provided to find the optimal beam pointing direction for a given position in the focal curve, but the inverse problem, which is the standard design approach, has to be solved by numerical methods.…”

Section: Introductionmentioning

confidence: 99%