A Miniaturized Dual-Band Modified Rectangular-Shaped Antenna for Wireless Applications

In this article, compact dual-band with rectangular-shaped monopole is presented for wireless applications. Presented antenna built of modified rectangular monopole and two C-shaped strips are attached on the radiating patch. An excellent matching to get the desired dual band operation is found from the back side of the substrate for possible feeding through microstrip. The suggested antenna has extremely small dimensions, measuring just 12 × 15 × 1.59 mm3 while operating at the lower frequency of 2.4 GHz, and it has a bandwidth of 400 MHz (2.1-2.5 GHz) and 6.7 GHz (3.4-10.1 GHz) accordingly with an S11 value that is less than -10 dB. An investigation of the performance capabilities of this dual-band omnidirectional antenna with a variety of geometric parameters has been carried out. The final design is constructed and measured, and the findings from simulation and measurement show a good level of agreement with one another. Across the entirety of the operating band, observable characteristics include a stable radiation pattern, strong impedance matching, and a radiation efficiency of more than 91%.