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Microwave and Millimeter Wave Circuits and Systems: Emerging Design, Technologies and Applications, 2nd Edition by Paolo Arcioni, Luca Roselli, Hendrik Rogier, Apostolos Georgiadis

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14

Active Antennas in Substrate Integrated Waveguide (SIW) Technology

Francesco Giuppi2, Apostolos Georgiadis2, Ana Collado2, Maurizio Bozzi1 and Luca Perregrini1

1University of Pavia, Pavia, Italy

2Centre Tecnologic de Telecomunicacions de Catalunya (CTTC), Castelldefels, Spain

14.1 Introduction

In this chapter, the substrate integrated waveguide (SIW) technology is adopted in the development of active low-profile antennas featuring a cavity-backed configuration; this topology consists of a traditional planar antenna where the radiating element is connected to a cavity. In the framework of modern wireless systems, these antenna structures have been extensively studied and implemented, as they offer many advantages, like increased efficiency performance thanks to the suppression of the unwanted surface-wave modes and better heat-dissipation capabilities due to the presence of an adequate metal surface. These features are particularly favourable in large array configurations handling high power levels and make these structures really suitable for wireless sensor networks and space communication applications.

In fact, low-profile antennas find an interesting field of application in the realization of reconfigurable phased-array configurations. Generally, this kind of designs requires compact, active antennas as unit elements, in order to avoid grating lobes when scanning the beam and to minimize spurious radiation. When active antenna elements are used, coupled oscillator arrays ...

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