This antenna is one in a series of L-Band patch antennas. It is optimized to yield a simple, low cost design with excellent reproducibility. This antenna is part of an L-Band, satellite, asset tracking modem with built in GPS L1 receiver.
The RHCP patch antenna is optimized for best possible coverage at the lower elevations. The antenna is DC grounded to protect LNA and receiver against static discharges. The LNA mounted on the back of this antenna compensates for the losses in the coaxial cable, thereby achieving the best possible overall receiver noise figure.