Gain

Microstrip antennas are the most common antennas widely implemented in different communication systems due to its small size, low profile and conformity to planar and non-planar surfaces. In this research work, the design and simulation of an innovative single element insetfed Rectangular Microstrip Patch Antenna (RMPA) for X-band application is presented. The proposed design used an operating frequency of 10 GHz, a Rogers RO4350 (tw) substrate with dielectric constant of 3.66, and a substrate height of 31 ml. The antenna performance characteristics such as return loss, bandwidth, VSWR, gain, directivity, beam width and radiation efficiency were obtained in the simulation. The simulation results showed that the designed antenna resonated at 10 GHz, with a return loss of-19.61 dB, bandwidth of 226.2MHz, VSWR of 1.82, gain of 6.58 dBi, directivity of 6.83 dBi, a wider beam width of 115.2o, and an antenna efficiency of 94.2%. The novel designed antenna can be embedded in wireless devices for commercial WLAN and WiMAX applications and also for onboarding on radar and satellite wireless communication systems for various surveillance and communication purposes.

this paper presents a comprehensive and accurate algorithm based on circuit model to design reflect-array antennas (RAAs). The proposed algorithm can extract geometry of RAA structure corresponding to radiation parameters without employing any approximation or optimization intervention into the algorithm. Simulation results for some comprehensive examples, verify the validity of the proposed algorithm. This method is simple, fast, accurate, and can be expanded to all species of RAAs with arbitrary geometries. One of the main problems confronted in RAAs is low bandwidth characteristics. To attain wide bandwidth, we exploited the proposed algorithm with combination of multi-layer design of RAAs and subwavelength element. Convergence is observed between simulation and fabrication results, asserting good accuracy in method. In 10-15 GHz band, the maximum gain and-1dB bandwidth of two-layer antenna is 31.4 dB and 18.5%, respectively.