This paper presents equilateral triangular microstrip antenna for wireless applications. The antenna consist of glass epoxy substrate material with relative permittivity 4.2 and thickness (h) is 0.16cm. The proposed antenna is resonates at 6.6 GHz with bandwidth of 4.54%, after loading the iron nanoparticles on the radiating patch of the antenna resonates for 4.1 GHz, 6.1Ghz, 7.3GHz and 11.3 GHz respectively, with enhancement of bandwidth up to 26.02%. The proposed antenna is suitable for Wi-Fi, radar and satellite communication applications. The experimentally measured and calculated antenna parameters such as return loss, VSWR, radiation pattern and gain are presented.