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

Apaydin,; Zhang, Bo; Sertel,; Volakis,

doi:10.1109/aps.2012.6349322

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…Also most of the input power is reflected back to the source [20] due to mismatching. To address this issue, we used a ferrite substrate and shift the open stop-band region outside the leakywave region [11,12]. Details of this design are given in next section.…”

Section: Periodic Leaky-wave Antenna Basicsmentioning

confidence: 99%

“…Previously [11,12], the leaky-wave radiation was achieved by exciting the first fast space harmonic (associated with phase constant b À1 = b 0 À 2p/p, where b 0 is the phase constant of dominant slow-wave and p is the period) of the dominant slow-wave mode. This harmonic becomes fast and radiates only at high frequencies, causing the antenna to be electrically longer (several k 0 long).…”

Section: Nonreciprocal Lwa Based On Coupled Tlsmentioning

confidence: 99%

“…However, mechanical tuning is usually slow and power consuming. To alleviate these issues, ferrites have been incorporated in LWAs to realize continuous scanning by controlling the magnetic material properties with an external magnetic field, H 0 [11,12]. Magnetic tuning offers wide-angle and continuous scanning without appreciable gain degradation.…”

Section: Introductionmentioning

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: Periodic Leaky-wave Antenna Basicsmentioning

confidence: 99%

Section: Nonreciprocal Lwa Based On Coupled Tlsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2014

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“…But, these approaches lead to degraded pattern performance. Alternatively, leaky-wave antennas have been proposed, but these require magnetic materials [4] or realize scanning by changing the operational frequency. To reduce cost and retain fabrication simplicity, in this paper we propose a reconfigurable transmission line for a series-fed array.…”

Section: Introductionmentioning

confidence: 99%

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

Apaydin

Zhang

Sertel

et al. 2013

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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

Cited by 5 publications

References 6 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

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

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

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