A 4 × 4 broadband patch antenna array has been developed for satellite communication downlink within the 3.7–4.2 GHz frequency range. The proposed design utilizes a hybrid feeding network combining both parallel and series configurations. In which, T-junction power splitters are employed to distribute equal power to each vertical sub-array, while quarter-wavelength transformers provide impedance matching between series elements. Fabricated on a 1.575 mm-thick Rogers 4350B substrate, the overall dimensions of the fabricated prototype are 2.11λ₀ × 2.35λ₀ × 0.018λ₀, where λ₀ is the free-space wavelength at the lowest frequency. Measurement results show that the array achieves a −10 dB impedance bandwidth of 16.3%, a peak realized gain of 14.5 dBi at 3.8 GHz, and an efficiency above 68% across the operating range of frequency. These features show the proposed antenna is a strong candidate for satellite communication systems for broadband applications