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A novel wideband and broad-beam microstrip antenna loaded with gaps and stubs is proposed. The antenna is based on atwo-layer stacked electromagnetic coupling microstrip patch antenna (ECMSA). The upper patch of the antenna is loaded with two arc gaps and three stubs. The ECMSA is used to achieve wide impedance bandwidth, while the gaps and stubs-loaded patch is used to obtain broad-beam. The impedance bandwidth is up to 34.6%. In this impedance bandwidth, the pattern bandwidth is 13%. In this pattern bandwidth, the 3%dB beamwidth of E-plane and H-plane remain stable and are about %60%. Simulation results agree well with measured results.