Miniaturization of Grid Array Antenna Using Spoof Surface Plasmon Po-laritons

This paper presents a design of miniaturized grid array antenna (GAA) using spoof surface plasmon polaritons (SPPs). The miniaturization is achieved by loading periodic grooves on the long sides of traditional GAA, with an aera-reduction factor of 36.3%. The matching stubs are introduced to improve impedance bandwidth. From the simulated results, the proposed antenna manages to support a -10 dB impedance bandwidth of 12.5%, ranging from 25.82 GHz to 29.26 GHz, with the maximum realized gain of 13.56 dBi. The effective size of the proposed antenna is 1.08λ
₀
×2.07λ
₀
×0.07λ
₀
, where λ
₀
is the vacuum wavelength at 28 GHz.