Abstract-In this paper, 4G smart planar dual-band phased array antenna suitable for fourth generation (4G) Long Term Evolution (LTE) at 3.5 GHz and also Wireless Local Area Network (WLAN) at 5 GHz systems is developed. The proposed planar array antenna is built using a microstrip rectangular U-slotted patch antenna element. Single element and linear sub-arrays with 1 × 2 and 1 × 4 dimensions of this element are designed, fabricated, and measured by the same authors. Separate feeding technique is used for each element of the smart planar array antenna; such that full beam-shaping can be achieved by steering the pattern main-loop to different angles in both azimuth and elevation directions with different amplitudes. Beam steering up to ±22 degrees can be achieved in both azimuth and elevation direction at 60 degree phase shift without the presence of any grating lobes. At this value of phase shift, the gain is 22.62 dBi without changing in the mutual coupling. This is also suitable for 4G Multiple-Input Multiple-Output (MIMO) wireless mobile applications with reduced power consumption. Design simulation and optimization processes are carried out with the aid of the Agilent Advanced Design System (ADS) electromagnetic simulator that uses the fullwave Method of Moment (MoM) numerical technique.
In this paper, we compare a dual-band, square spiral microstrip patch antenna constructed from Multi-Walled Carbon Nanotubes (MWCNT) ink for wearable application simulated by Computer Simulation Technology Microwave Studio (CST MWS) by our work simulated by Advanced Design System (ADS) electromagnetic simulator using the same material characterization. The reflection coefficient is -12 dB at 1.2276 GHz for MWCNT and -13 dB at 1.25 GHz for the copper simulated by CST MWS and reflection coefficient is -12.235 dB at 1.234 GHz for MWCNT and -18.36 dB at 1.243 GHz for the copper simulated by ADS and the reflection coefficient is -27dB at 2.47 GHz for MWCNT and -13 dB at 2.53 GHz for the copper simulated by CST MWS and the reflection coefficient is -26.08 dB at 2.48 GHz for MWCNT and -17.031 dB at 2.47 GHz for the copper simulated by ADS. We show the meandering of the surface current on the radiating in spiral patch. The antenna gain is found to be -12.5 dBi at 1.22 GHz for MWCNT and is found -12.05 dBi at 1.25 GHz at CST MWS and the antenna gain is found to be -11.85 dBi at 1.235 GHz for MWCNT and is found -12.25 dBi at 1.243 GHz at ADS and the antenna gain is found to be -4.25 dBi at 2.47 GHz for MWCNT and is found -4.01 dBi at 2.53 GHz at CST MWS and the antenna gain is found to be -4.23 dBi at 2.47 GHz for MWCNT and is found -4.88 dBi at 2.45 GHz at ADS. We show a close agreement in the results obtained by the two simulation software's CST MWS and ADS. The results are given for both MWCNT and Copper characterizations.
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