Nonreciprocal and magnetically scanned leaky-wave antenna using coupled CRLH lines

Apaydin, Nil; Zhang, Lanlin; Sertel, Kubilay; Volakis, John L.

doi:10.1109/aps.2013.6711807

Cited by 4 publications

(3 citation statements)

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“…As already noted, in this work, the beam was scanned by physically moving the permanent magnet away from the LWA to control/modify the bias field [24]. Clearly, this approach is not practical.…”

Section: à3mentioning

confidence: 99%

“…The latter substrate has saturation magnetization 4pMs = 800 G, loss linewidth DH = 30 Oe, permittivity e r = 14.2, dielectric loss tangent tand = 0.001. An external DC magnetic field of strength H 0 is applied normal to the ground plane to control the ferrite's material properties and realize beamsteering without a need for frequency modulation [24].…”

Section: Nonreciprocal Lwa Based On Coupled Tlsmentioning

confidence: 99%

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Nonreciprocal and magnetically scanned miniaturized leaky-wave antennas using coupled transmission lines

2014

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-This paper presents a new class of magnetically scanned leaky wave antennas (LWAs), incorporating ferrite (or possibly magnetoelectric composite), for wide angle beamsteering. Using the ferrite's tunable permeability beamsteering is achieved by controlling the external bias field. This is unlike most leaky-wave antennas requiring frequency modulation to steer the beam. Our first design is based on coupled microstrip lines on a biased ferrite substrate with nonreciprocal radiation properties, specifically a 5 dB contrast between the measured transmit and receive gain in the E-plane was achieved. However, it was found that inhomogeneities in the bias field limited its scanning performance. To alleviate this issue, a new class of miniaturized metamaterial based LWA was considered and presented here. This new design is based on coupled composite right left handed (CRLH) transmission lines (TLs) and has a unit-cell length of only k 0 /20. For validation, a 15-unit-cell prototype was manufactured and its TX/RX beams were scanned in the E-plane 80°by changing the bias field within a range of ±50 Oe. We found that the associated antenna gain varied between 3.5 dB and 5 dB at 1.79 GHz as the beam was scanned. In the above design, scanning was realized by changing the distance between the bias source and the LWA. Thus, future work will be focused on LWAs tuned by biasing a magnetodielectric layer placed below the ferrite substrate.

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Section: à3mentioning

confidence: 99%

Section: Nonreciprocal Lwa Based On Coupled Tlsmentioning

confidence: 99%

Nonreciprocal and magnetically scanned miniaturized leaky-wave antennas using coupled transmission lines

2014

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“…Another method of beam scanning is to generate leaky waves. These leaky wave phased array antennas need to be several wavelengths long to apply slow wave techniques, and accordingly, extra space are required in the arrays [7]. Other well-known beamforming methods are switched-beam antenna systems as lens-based beamforming networks (such as the Luneberg [8] and Rotman lenses [9]) and circuit-based beamforming networks (such as the Blass [10] and Butler Matrices [11]- [12]).…”

Section: Introductionmentioning

confidence: 99%

Millimeter wave phased array antenna for modern wireless communication systems

Kapusuz¹,

Oğuz

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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This paper reports on the development of a switched-beam phased array antenna which is the first 35 GHz Butler Matrix based phased array on a single layer substrate. The structure consists of four linearly placed rectangular patch antennas, four hybrids, two crossovers, two 45 o phase shifters and a corporate feed network. In the array, in order to steer the beam, a 4x4 Butler Matrix has been successfully designed and simulated. The results show that the beam can be nearly steered -45 o / -15 o /+15 o /+45 o . The scanned gain of the phased array antenna is nearly 8 dBi. This switched beam forming system can be used in modern wireless communication systems.Index Terms-beamforming network, Butler matrix, millimeter wave array, phased array.I.

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Reconfigurable transmission line for a series-fed Ku-band phased array using a single feed

Host

Chen

Volakis

et al. 2013

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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The paper presents a novel approach to realize a lowcost phased array using a simple feeding mechanism. Specifically, a single coplanar stripline (CPS) transmission line is used to feed the antenna array elements. By controlling the CPS's dielectric properties using a movable dielectric plunger, scanning is achieved. Due to its simplicity, single feed, and no phase shifters, this approach leads to a dramatic reduction in cost which does not scale for larger arrays.I.

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Nonreciprocal and magnetically scanned leaky-wave antenna using coupled CRLH lines

Cited by 4 publications

References 12 publications

Nonreciprocal and magnetically scanned miniaturized leaky-wave antennas using coupled transmission lines

Nonreciprocal and magnetically scanned miniaturized leaky-wave antennas using coupled transmission lines

Millimeter wave phased array antenna for modern wireless communication systems

Reconfigurable transmission line for a series-fed Ku-band phased array using a single feed

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