Realization of Rotman's concepts of beamformer lenses and artificial dielectric materials

Zaghloul, Amir I.; Kıłıc, Özlem; Weiss, Steven J.; Adler, Eric D.

doi:10.1109/comcas.2009.5385958

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…In the past few decades, methods to improve the magnitude and phase performance of Rotman lenses have been considered for the conventional lens equations [2][3][4][5][6][7][8] or using optimization methods [9][10][11]. These lenses can be used for many applications such as multi-beam wireless communication systems in military [12][13][14][15]. With the development of fabrication technologies, numerous Rotman lens designs have been developed employing different techniques including microstrip [2,[5][6][7][8], graded dielectric substrates [16] or substrate integrated waveguides [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Compact Rotman Lens Structure Configurations to Support Millimeter Wave Devices

Dai¹,

Kıłıc²

2016

PIER B

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Abstract-The development of modern communication devices for the latest technologies such as 5G has brought the millimeter wave technology into the spotlight because it offers higher data rates and bandwidth. Since highly directional transmissions are necessary for communication in these frequencies due to high path loss and atmospheric absorption, the use of adaptive antennas is inevitable. Rotman lenses have long been used as analog beam forming networks to support linear array antennas for electronic scanning. Their broad bandwidth and planar structure make them ideal for a variety of applications. However, their overall dimensions can be prohibitive especially for large scan angles. In this paper, we propose a few compact configurations that reduce the overall dimensions of Rotman lens as much as 50% without degrading its performance.

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Section: Introductionmentioning

confidence: 99%

Compact Rotman Lens Structure Configurations to Support Millimeter Wave Devices

Dai¹,

Kıłıc²

2016

PIER B

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“…Since then, numerous different methods were proposed to improve the magnitude and phase performance of Rotman lenses using the conventional lens equations [2][3][4][5][6][7][8][9] or based on optimisation methods [10][11][12]. Due to its simple structure and cost-effective fabrication process, Rotman lenses can be used for many applications such as multi-beam wireless communication systems for the military [13][14][15][16]. With the development of materials and fabrication technologies, several Rotman lens designs have been developed employing different techniques including microstrip [2,[5][6][7][8], graded dielectric substrates [17] or substrate integrated waveguides [18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Compact multi‐layer microstrip Rotman lens design using coupling slots to support millimetre wave devices

Dai

Nguyen

Kıłıc

2018

IET Microwaves, Antennas & Propagation

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Millimetre wave technology is now considered as a key component for the next generation (5G) of cellular networks since they offer higher data rates and broader bandwidth compared to the current technology. However, since communication in this frequency band suffers higher propagation loss and atmospheric absorption (∼12 dB/km), the use of highly directional antennas plays an important role in order to compensate for these losses. Therefore, it is necessary to design beamforming networks that are not only able to support these antennas but also offer practical and compact solutions to be placed in any modern transceiver system. Rotman lenses have long been used as analogue beamforming networks to support linear array antennas for electronic scanning. Their broad bandwidth and planar structure make them ideal for these types of applications. However, their overall dimensions can be prohibitively large, especially for systems requiring large scan angles. In this study, the authors propose a new compact configuration that reduces the overall dimensions of the conventional Rotman lens by as much as 50% without degrading its performance.

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