Microstrip antenna with integral low-noise amplifier for use in global positioning system (GPS) receivers

A microstrip antenna system, comprising:

• a flat dielectric substrate having a pair of opposite first and second sides;
• a high-gain, low-noise transistor mounted to the dielectric substrate on said first side and having a first port impedance;
• a groundplane electrode disposed on said first side of the dielectric substrate and including an opening for surrounding the transistor;
• a rectangularly-shaped, diagonally-fed dipole antenna radiating electrode disposed on said second side of the dielectric substrate and opposite to the transistor and groundplane electrode;
• and
• an inductive connection between the transistor and the radiating electrode at a critical diagonal feeding point on the radiating electrode that matches said first port impedance, wherein the inductive connection has an inductance value and makes connection to said critical point on the radiating electrode that is equivalent to a predetermined impedance Zo and a noise figure minimum, with respect to the transistor.