Abstract
This letter reports a microstrip mesh array antenna in a low temperature co-fired ceramic (LTCC) technology for 94-GHz applications. The microstrip mesh array antenna enlarges the system polarization diversity with the capability of being utilized to support the simultaneous reception in two orthogonal polarizations, as well as transmission in either polarization. The proposed design is composed of two grid arrays in two orthogonal directions, where matching stubs are specially designed to compensate the alteration of input impedance due to the direct coupling of the complementary array of another polarization. The dual linearly polarized microstrip mesh array antenna achieved a measured maximum realized gain of 13.3 dBi at 93.6 GHz, a 10-dB impedance bandwidth of 6.91%, and 3-dB gain bandwidth of 1.70% at 94 GHz as a one-port antenna.
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