volume | PIER Journals

Abstract

This paper introduces an innovative antenna design for direct antenna modulation (DAM) applications in the 5G sub-6 GHz band. The antenna has a composite right/left-handed (CRLH) structure, an electromagnetic bandgap (EBG) made of Hilbert inclusions, and an artificial magnetic conductor (AMC) reflector. The AMC reflector reflects light with no phase shift at the design frequency, boosting forward gain to a maximum of 20 dBi at 5.59 GHz and reducing back lobes. One important new idea is to use integrated light-dependent resistors (LDRs) for photonic reconfiguration. This lets one change the antenna's impedance and resonant characteristics in real time. Changing the LDR states dynamically changes the antenna's gain in real time. For example, at 5.5 GHz, it can go from 10.11 dBi to 19.85 dBi. This makes it possible to do direct amplitude modulation without any outside modulators. Experimental results validate the effective implementation of DAM, demonstrating quantifiable alterations in channel capacity and bit error rate (BER) associated with varying antenna gain states. The suggested system shows a practical, adaptable antenna solution for modern adaptive communication systems.

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Dr. Yahiea Alnaiemy

Dr. Mariam Qutaiba Abdalrazak

Dr. Zainab Salam

Prof. Taha Ahmed Elwi