longitudinal slots on substrate integrated waveguide

In this work, leaky-wave radiation for wide and consistent beam scanning along with broadside radiation is proposed.

IEEE Indian Conference on Antennas and Propagation MNIT(InCAP), Jaipur, 13-16 December 2021 Substrate Integrated Waveguide Based Compact Periodic Leaky-Wave Slot Antenna With Improved Beam Scanning using _10^y mode Both baluns not only show good performance, but also demonstrate the existence of the TE20 mode in the SIW.Please use this identifier to cite or link to this item: The balun based on the aperture coupling excitation shows a fractional bandwidth of 50.3%, from 7 to 11.7 GHz, with measured return loss, insertion loss, amplitude imbalance, and phase imbalance better than 10, 1, and 0.27 dB and 2.4 degrees, respectively. The balun based on the slotline excitation has a fractional bandwidth of 50.2%, from 7.3 to 12.2 GHz, with measured return loss, amplitude imbalance, and phase imbalance better than 10 and 0.45 dB and 3.8 degrees. The 180 degrees out-of-phase and equal magnitude of the balun outputs in a wide frequency range can be achieved inherently. As application examples of the transitions, two broadband substrate integrated baluns are presented and fabricated based on the TE20 mode excitation structures and TE20 mode characteristics. The wideband transition performance is demonstrated in this paper. Both transitions have a simple and compact structure, as well as broadband characteristics. The second structure is based on the slot aperture coupling and can realize wideband direct transition between the TE20 mode SIW and microstrip line. A slot along the mid line in the longitudinal direction of the SIW is employed to convert the electromagnetic field pattern between slotline and the TE20 mode SIW. In this paper, two wideband TE20 mode excitation structures are presented and investigated for the SIW. The higher order mode substrate integrated waveguide (SIW) has advantages in the applications, which are: 1) simplifying the structure with reduced fabrication cost and 2) enhancing the stability of performance by relaxed fabrication tolerance.

Longitudinal slots on substrate integrated waveguide