Transmission line structure based on substrate integrated waveguide (SIW) loaded with new structure of octagonal complementary split ring resonator (CSRR) has been proposed. The SIW loaded CSRR pair is used in dual/quad octagonal structure to design dual band pass filter (single and double pole) with improved performance characteristics. The proposed band pass filter (BPF) yields two passbands ...

Five POM-based hybrid materials have been designed and synthesized based on different metal ions under hydrothermal conditions, namely, [Zn(Hfcz)(H(2)O)(3)](H(3)fcz)(SiMo(12)O(40)).3H(2)O (1), [Cd(2)(Hfcz)(6)(H(2)O)(2)](SiMo(12)O(40)).H(2)O (2), [Co(2)(Hfcz)(2)(SiW(12)O(40))](H(3)fcz)(2)(SiW(12)O(40)).10H(2)O (3), [Ni(2)(Hfcz)(4)(H(2)O)(2)](SiW(12)O(40)).5H(2)O (4) and [Ag(4)(Hfcz)(2)(SiMo(12)O...

A novel frequency reconfigurable antenna based on substrate integrated waveguide (SIW) for S-band and C-band applications is proposed. The employs a SIW resonant cavity structure with rectangular-ring slot long slit etched the top surface. An extra via post introduced to adjust resonance of low-frequency mode independently without affecting impedance matching high-frequency or decreasing gain. ...

Objectives. To determine the safety and efficacy of three different mydriatic regimens in premature infants referred for retinopathy prematurity (ROP) screening using (1) multiple alternate instillations 0.5% cyclopentolate hydrochloride 2.5% phenylephrine (MAI), (2) single instillation 0.5%/0.5% tropicamide + (SI) (3) with a cotton wick placed inferior fornix (SIW) Philippine tertiary hospital...

<p>The main objective purpose of this paper is to study the enhancement techniques unloaded quality factor substrate integrated waveguide (SIW) resonator, given that filters depends first on resonators compose it. Performance achieved by employing a MATLAB-based genetic algorithm optimize geometrical parameters SIW resonator iterative convergence target frequency (10 GHz frequency). On ot...

Summary This article communicates a novel compact four‐element orthogonal cavity‐backed antenna for 5G applications with enhanced isolation. The proposed dumbbell‐shaped substrate integrated waveguide–multiple input/multiple output (SIW‐MIMO) resonate at 5.25 GHz (sub‐6 GHz) based on vias and 27 (mm‐wave) copper filling using FR‐4 substrate. Both prototypes are separately designed, fabricated, ...

A novel approach for the design of millimeterwave (mmWave) substrate-integrated waveguide (SIW) switches is presented. The switch based on controllable photoconductive elements (PEs), whose conductivity modulated by a light source. PE integrated top SIW metal plate and provides either short-circuit or transmission operation regime, depending actuation conditions. Due to actuation, mmWave dc con...

This communication presents a vertically stacked substrate-integrated waveguide (SIW) antenna array that enables different configurations with the minimum number of SIW layers. achievement lies in modular feature offered by proposed design. Specifically, four distinct can be produced only three designs Depending on layers employed antenna, directivity E-plane is modified. To obtain an equal and...