With increasing popularity of conformal plastic-embedded antennas for automotive applications, low-profile antennas are in high demand. Some of the important challenges are sufficient impedance bandwidth and controllable electromagnetic interaction between the antenna and the metallic chassis. This letter presents an innovative differentially fed di-patch antenna that offers a number of crucial advantages over typical patch antennas: doubled impedance bandwidth, tolerant with respect to metal surfaces, at least 40% smaller footprint area, and no reduction of directivity compared to a patch antenna at the same frequency. The di-patch antenna is described, and its principle-of-operation discussed on the basis of an equivalent model, followed by relevant simulation and measurement results.