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MultiBeam Multi-Layer Leaky-Wave SIW Pillbox Antenna for Millimeter-Wave Applications

MultiBeam Multi-Layer Leaky-Wave SIW Pillbox Antenna for Millimeter-Wave Applications,10.1109/TAP.2011.2109695,IEEE Transactions on Antennas and Propa

MultiBeam Multi-Layer Leaky-Wave SIW Pillbox Antenna for Millimeter-Wave Applications   (Citations: 4)
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This work proposes a novel multi-beam leaky-wave pillbox antenna. The antenna system is based on three main parts: feeding part (integrated horns), quasi-optical system and radiating part. The radiating and input parts are placed in two different stacked substrates connected by an optimized quasi-op- tical system. In contrast to conventional pillbox antennas, the quasi-optical system is made by a pin-made integrated parabola and several coupling slots whose sizes and positions are used to efficiently transfer the energy coming from the input part to the radiating part. The latter consists of a printed leaky-wave antenna, namely an array of slots etched on the uppermost metal layer. Seven pin-made integrated horns are placed in the focal plane of the integrated parabola to radiate seven beams in the far field. Each part of the antenna structure can be optimized inde- pendently, thus facilitating and speeding up the complete antenna design. The antenna concept has been validated by measurements (around 24 GHz) showing a scanning capability over in azimuth and more than 20 in elevation thanks to the frequency scanning behavior of the leaky-wave radiating part. The proposed antenna is well suited to low-cost printed circuit board fabrica- tion process, and its low profile and compactness make it a very promising solution for applications in the millimeter-wave range.
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    • ...However, when several probe sources are needed, as for planar multibeam integrated systems [9], the effect of mutual coupling should be taken into account, as shown in [3] and [5] for superstrate configurations...
    • ...An SIW feed inside an air-filled PPW has been analyzed . The structure parameters have been chosen having in mind, as a final application, the illumination of an integrated reflector as the one used in [9] with an edge tapering of 10 dB over an aperture of and intersource distance of . The geometrical dimensions selected here are provided in Table I. The corresponding dispersion diagram is given in Fig. 2. In this figure, only the ...
    • ...Even if in this case the mutual coupling is really low, the corresponding launched field would not be suited to efficiently illuminate an integrated parabola [9]...

    E. Gandiniet al. Mutual Coupling Reduction of Fabry–Perot SIW Feeds Using a Double Part...

    • ...[8],[12]. Through the resolution of the dispersion equation of the...

    Erio Gandiniet al. Mutual coupling reduction for integrated pin-made feed

    • ...In [4],[5], a passive scanning was obtained by switching between several feeds in the focal plane of the quasi-optical transition (beam-switching)...
    • ...Two different radiating parts have been considered: a leaky-wave solution [4]-[5] (Fig.1) and an array of slotted waveguides [6]-[10]...
    • ...5 and 7, have been measured [4],[5]: i. In K-band, a prototype with seven input horns in the focal plane of the quasi-optical system has been considered (Fig. 2). ii. In the W-band, three different prototypes with different feed locations corresponding to 0.5 and 1.5 times the horn aperture: on axis (LW0), 0.75 (LW1), and 2.25 (LW2) away from the parabola axis...

    Mauro Ettorreet al. Multibeam pillbox antennas in the millimeter-wave range

    • ...configuration [5], [6], where the feeding and radiating parts are located in two different substrates connected by a quasi-optical system made by an integrated parabolic reflector and several coupling slots (pillbox transition)...
    • ...The complete antenna system is based on three main building modules: the input part, the quasi-optical system, and the radiating part [5], [6]...
    • ...The latter is made by several coupling slots in the metallic layer M.2 (Fig. 1) bordering the integrated parabola [5], [6]...
    • ...time, improve the power transfer and wavefront quality of the coupled mode traveling in the second substrate [5], [6]...

    Mauro Ettorreet al. Single-Folded Leaky-Wave Antennas for Automotive Radars at 77 GHz

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