A triangle shaped microstrip patch antenna (TMPA) design is suggested for dual band resonance through multiple C designed slots on DGS structure. Further the frequency tunable TMPA is investigated through the reshaping of the C-shaped slot length by using two RF switches. Here the proposed TMPA with dimension of 0.47λ x 0.47λ x 0.01λ show the frequency tunability for two resonant frequencies at 3.84 and 1.91 GHz for S and L band. A prototype of TMPA design is fabricated and the measured results show good agreement with HFSS based simulations. The measured results of the TMPA show a gain of 2.3 dB at 3.84 GHz and 1.5 dB at 1.91 GHz resonant frequencies, respectively. The designed DGS based TMPA further shows the antenna high speed communication for 5G-NR (n77 band) (3.3–4.2 GHz) and GPS (L-Band) based applications as per FCC.
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