Novel Thin and Compact H-Plane SIW Horn Antenna

Abstract

Abstract-The substrate integrated waveguide (SIW) technology allows to construct several types of commonly used antennas in a planar way. However, some practical constraints limit their performances when frequencies below 20 GHz are considered. In the case of SIW horn antennas, the available substrates are much thinner than the wavelength yielding to poor matching and undesired back radiation. In this paper, an innovative structure to overcome these limitations is presented. It consists of a transition printed on the same SIW substrate, which improves both the radiation and the matching performances of conventional SIW horns. The horn shape is also further optimized by reducing its dimensions required for a given directivity. This is obtained by modifying the horn profile in order to effectively combine different TE modes. Guidelines are provided to design this type of thin and compact SIW horn antenna. They were applied to manufacture a prototype in the Ku-band with a substrate thinner than . Measurement results validate the proposed concepts showing excellent performances.Index Terms-End-fire, front-to-back ratio, horn antenna, horn taper, low profile, printed transition, size reduction, substrate integrated waveguide, vertical polarization.

Substrate-Independent Microwave Components in Substrate Integrated Waveguide Technology for High-Performance Smart Surfaces

“…Thereby, thick AFSIW cavities can be easily constructed by using thicker surface material with longer tubelets. In contrast, in a standard PCB manufacturing process, thicker substrates (h 1 + h 2 + h 3 > 2.5 mm) are not preferred for manufacturing SIW components, due to via-hole metallization issues [10]. Moreover, the use of tubelets preserves the flexibility of conformal microwave component designs [28].…”

“…By confining the electromagnetic fields [9], their waveguide topology yields high isolation and suppresses surface waves. Moreover, various bandwidth enhancement techniques enable designers to meet the demanding requirements of the current and next generation IoT applications [10]. Furthermore, SIC microwave components and systems may be implemented with innovative materials through various manufacturing techniques [11].…”

Development of novel wideband H-plane horn antennas by employing asymmetrical slots based on SIW technology

“…Therefore, one of the promising candidates for solving such problem and developing microwave components in these bands is SIW technology. SIW structures have been widely employed in microwave components, antennas, and circuit designs [1][2][3][4][5][6][7]. Besides, SIW structures can be integrated with feeding network.…”

“…They are also good candidate to feed the surfacewave or leaky-wave antennas [4]. Various planar antennas based on SIW technology have been investigated by numerous researchers since now [3][4][5][6][7][8]. However, design of wideband antennas is the most upcoming challenge at millimeter-wave bands (30-300 GHz).…”

“…Different kinds of SIW H-plane horn antennas have been presented * Corresponding author. in [3][4][5][6][7]; although some of the mentioned antennas have good radiation characteristics, they have limited bandwidth. A wideband H-plane horn antenna based on ridge substrate integrated waveguide (RSIW) has been developed in [8].…”