Miniature Dual-Band Substrate Integrated Waveguide Slotted Antenna Array for Millimeter-Wave 5G Applications

Table 1

Comparison of dual-band SIW antenna arrays (28/38 GHz).

No.	Number of cavities	Antenna footprint (mm^2)	Multiple layers?	Impedance bandwidths (GHz)
[11]	2 × 2	105.0 × 83.7	Yes	24.2–27.8, 36.9–42.8
[12]	2 × 2	32.0 × 40.2	Yes	26.3–32.3, 37.4–38.4
[13]	1 × 4	27.5 × 28.5	Yes	26.7–30.4, 36.6–38.8
[14]	1 × 4	40.0 × 27.5	No	28.0–28.3, 37.3–39.1
This study	1 × 4	28.7 × 30.8	No	26.6–28.3, 36.8–38.9