Saif Alaa Jasim Halboos

We have experimentally investigated and simulated the diversity of unbalanced Mach-Zehnder interferometer (UMZI) designs. The group index and free spectral range (FSR) are measured for both the transverse electric (TE) and transverse magnetic (TM) designs for a silicon (Si) strip waveguide that has a 500 nm width and a 220 nm height. The simulated TE UMZI with arm's length difference of 50 µm shows 11 nm and 4.33 of the FSR and group index, respectively. The group index is 3.103, and FSR is 13.5 for the TM UMZI. These designs show a slight variation compared with the simulation results due to fabrication variation. Overall, the TM UMZI design is more sensitive to the manufacturing variation than the TE UMZI designs. Photonic interferometers have been widely used in photonic devices, and such photonic devices have potential applications in photonic modulators, sensors, filters, and future computing via photonic integrated circuits (PICs)

We have experimentally demonstrated and simulated an enhanced design of a triple-band patch array. The proposed antenna design is enhanced by merging multiple split-ring resonators (SRR) on a single-layer dielectric substrate. The proposed design works on reducing the footprint size with improved return loss, gain, and bandwidth compared with related works. The simulated results show that the proposed antenna operates at 5.96 GHz, 7.96 GHz, and 14.94 GHz and it agrees with the experimental results. High gain values of 9 dB, 6.9 dB, and 7.6 dB were obtained from the designed antenna with split ring resonators at those frequencies, respectively. The return loss for each frequency was -45.77 dB, -33.21 dB, and -45 dB, respectively. The outcomes show an agreement between the simulated and measured results with the fabricated antenna. The suggested antenna outcomes and analysis show that the antenna can operate within the KU and C bands, therefore it has potential applications in Wi-Fi, microwave devices, radar, and satellite communications systems