Design of compact dual‐band substrate integrated waveguide filtenna

Abstract

A compact dual‐band substrate integrated waveguide (SIW) filtenna is presented. A dual‐mode SIW cavity, resonating at its fundamental mode TE110 and high‐order mode TE120, which respectively dominate the lower and upper passbands, is employed as the feeding cavity. After that, a slot‐loaded SIW cavity, performing as two half‐mode radiating cavities, is perpendicularly arranged over the feeding cavity for the purpose of expanding the operational bandwidth and also strengthening the filtering response. Furthermore, two metal posts are utilized to independently regulate the coupling strength of magnetoelectric energy of the two passbands, respectively. A prototype of this dual‐band SIW filtenna is designed, fabricated, and tested for validation. The measured results agree well with the simulated values, demonstrating that the maximum realized gains are 4.9 and 5.38 dBi, and the impedance bandwidths are 2.1% (2.792–2.852 GHz) and 4.1% (3.992–4.16 GHz) for lower and upper passbands, respectively.

Compact metal‐printed filtering antenna with wideband performance

“…11 Among these investigations, the cavity-backed filtering antennas are one of the most popular candidates for filtering antenna design, due to its attractive properties like high radiation efficiency and high gain. Besides, to expand the bandwidth of cavity antennas, multimode design techniques are used, [10][11][12][13][14][15][16][17][18][19] and cavities were integrated with nonresonant slot, [10][11][12][13][14][15][16][17] resonant slots, 18 or patch antennas. 19 In Kumar and Althuwayb, 10 two stacked cavities are coupled through transverse slots, thus achieving multimode resonances.…”

A Monolithically Printed Filtering Waveguide Aperture Antenna

“…In [15], although the three-line coupling scheme in the fed-port of the Leaf-shaped filtering antenna has brought TZs near the passband edges, the peak gain value is 4.02 dBi which may not be sufficient. Similarly, in [16], a dual mode SIW cavity has strengthened the frequency selectivity of the filtering slot antenna. However, its bandwidth does not exceed 4.1%, and the peak gain value is 5.38 dBi.…”

Broadband high‐efficiency high‐gain dual‐beam empty substrate integrated waveguide cavity‐backed filtenna

“…Recently, the substrate‐integrated waveguides (SIW) filtennas based on the filter design theory have attracted extensive attention 11–14 . These works demonstrate that the integrated design of antenna and filter has the potential to realize both broadband and filtering.…”