Design of tapered leaky-wave antennas in hybrid waveguide-planar technology for millimeter waveband applications

Gómez‐Tornero, José Luis; Martinez, Adl.T.; Rebenaque, David Cañete; Gugliemi, M.; Álvarez‐Melcón, A.

doi:10.1109/tap.2005.850741

Cited by 91 publications

(28 citation statements)

References 14 publications

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“…It is worth noting that an elliptical iris etched in a rectangular waveguide is well-known in the antenna engineering community as the unit cell of a slotted waveguide antenna (SWA). SWAs are particularly attractive due to their advantages in terms of design simplicity, weight, volume, power handling, directivity, and efficiency [60,[85][86][87][88]. SWAs rely on the gradual leakage of the guided mode through the slots.…”

Section: Simulated Results For the Rectangular Waveguidementioning

confidence: 99%

Polarizability extraction of complementary metamaterial elements in waveguides for aperture modeling

et al. 2017

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We consider the design and modeling of metasurfaces that couple energy from guided waves to propagating wavefronts. This is a first step towards a comprehensive, multiscale modeling platform for metasurface antennas-large arrays of metamaterial elements embedded in a waveguide structure that radiates intro free-space-in which the detailed electromagnetic responses of metamaterial elements are replaced by polarizable dipoles. We present two methods to extract the effective polarizability of a metamaterial element embedded in a one-or two-dimensional waveguide. The first method invokes surface equivalence principles, averaging over the effective surface currents and charges within an element to obtain the effective dipole moments; the second method is based on computing the coefficients of the scattered waves within the waveguide, from which the effective polarizability can be inferred. We demonstrate these methods on several variants of waveguidefed metasurface elements, finding excellent agreement between the two, as well as with analytical expressions derived for irises with simpler geometries. Extending the polarizability extraction technique to higher order multipoles, we confirm the validity of the dipole approximation for common metamaterial elements. With the effective polarizabilities of the metamaterial elements accurately determined, the radiated fields generated by a metasurface antenna (inside and outside the antenna) can be found self-consistently by including the interactions between polarizable dipoles. The dipole description provides an alternative language and computational framework for engineering metasurface antennas, holograms, lenses, beam-forming arrays, and other electrically large, waveguide-fed metasurface structures.

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Section: Simulated Results For the Rectangular Waveguidementioning

confidence: 99%

Polarizability extraction of complementary metamaterial elements in waveguides for aperture modeling

et al. 2017

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“…As stated above, a LWA is based on a guiding structure that propagates a wave in one direction, either uni directionally (a source is placed at one end of the structure) or bi directionally (a source is placed in the middle of the structure).Depending upon the geometry, principle of operation and the nature of structural perturbations, leaky wave antennas can be divided into several categories [14]. As mentioned in introduction, the basic distinction is between one-dimensional and two-dimensional leaky wave antennas.…”

Section: Overview Of Leaky Wave Antennas 41 Classification Of Lwasmentioning

confidence: 99%

A Review of 1-Dimensional and 2-Dimensional Leaky Wave Antenna and Recent Advancements in LWAS

Vashishtha¹,

Yadav²,

Chaudhary³

2016

IJCA

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This paper gives a basic review and a summary of old and recent advancements on Leaky Wave Antenna theory and design. Leaky waves have been among the most active areas of research in microwave engineering over the second half of the 20 th century. A leaky wave is treated mathematically as a complex plane wave and the resulting radiation pattern is derived in terms of the complex propagation constant. In particular, the compatibility with the printed circuit board technology, their low profile, easiness of fabrication and integration with the other planar components are the strongest features of Leaky Wave Antennas. A LWA uses a guiding structure that supports wave propagation along the length of the structure, with the wave radiating or "leaking" continuously along the structure. Such antennas is classified into two categories, namely one-dimensional and twodimensional variants. They radiate primarily at the end fire direction and broadside direction to get the maximum scan angle of the radiation beam and these antennas may be uniform, quasi-uniform, periodic. These antennas have many applications at the millimetre wavelengths, frequency scanning. In this paper, a summary of some recent advances for these types of structures is given. Recent advances include structures that can scan end fire, structures that can scan broad side, and structures that are conformal to surfaces.

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“…3. Figure 4 shows a comparison of the propagation characteristics for a slot-type LWA as given in [7], all the structural and constitutive parameters are the same with those shown in Fig. 7 in [7] for comparison.…”

Section: The Radiating Open Endmentioning

confidence: 99%

“…It is well known that the aperture distribution must be tapered to yield the desired sidelobe performance [6]; this tapering procedure jeopardizes the robustness of the waveguide structure and brings up practical difficulties in the manufacturing process. A good solution is to combine the waveguide configuration with planar technology [7], as illustrated in Fig. 1.…”

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confidence: 99%

Investigation on a Novel Leaky Wave Antenna with Double Radiation Beam Composed of Left-handed Slab Loaded Hybrid Waveguide using Planar Technology

Huang

Pan

2008

J Infrared Milli Terahz Waves

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A novel leaky wave antenna with double radiation beam composed of lefthanded slab loaded hybrid waveguide using planar technology is proposed in this paper and its leaky characteristics are investigated with a method that the multimode network theory is combined with mode-matching method. The study of dispersion curves reveals that the proposed antenna structure supports two leaky modes corresponding to the forward and the backward radiations respectively. It demonstrates that the proposed antenna is of desirable property that can radiate both forward and backward directions simultaneously with quite simple and flexible configuration. Extensive numerical results of leaky characteristics with different structural parameters of the antenna are given to provide useful guidelines for the design of the new antenna.

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Design of tapered leaky-wave antennas in hybrid waveguide-planar technology for millimeter waveband applications

Cited by 91 publications

References 14 publications

Polarizability extraction of complementary metamaterial elements in waveguides for aperture modeling

Polarizability extraction of complementary metamaterial elements in waveguides for aperture modeling

A Review of 1-Dimensional and 2-Dimensional Leaky Wave Antenna and Recent Advancements in LWAS

Investigation on a Novel Leaky Wave Antenna with Double Radiation Beam Composed of Left-handed Slab Loaded Hybrid Waveguide using Planar Technology

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