A Y-Shaped Stub Proximity Coupled V-Slot Microstrip Patch Antenna

A Y-shaped proximity coupled V-slot microstrip patch antenna (MPA) is presented in this letter. Separating the patch from the Y-shaped stub by a foam layer with height of 0.05lambda
₀
(lambda
₀
is the free-space wavelength at the center frequency), the proposed MPA shows an impedance bandwidth (BW) of 21%, simple structure and a high gain of about 9 dBi, which is not sensitive to the fabrication and construction errors