A compact Ka-band broadband waveguide-based travelingwave spatial power combiner is presented. The low loss micro-strip probes are symmetrically inserted into both broadwalls of waveguide, quadrupling the coupling ways but the insertion loss increases little. The measured 16 dB return-loss bandwidth of the eight-way back-toback structure is from 30 GHz to 39.4 GHz (more than 25%) and the insert...

This paper presents a study of various types losses in substrate-integrated waveguides (SIW) using genetic algorithm. Three main are considered and examined separately: conductor loss, dielectric radiation loss. Furthermore, the current analysis allows for physical understanding loss impacts as well creation design guidelines to reduce at 10 GHz frequency while keeping miniaturized size SIW. Va...

Wireless control of modular multilevel converter (MMC) submodules can benefit from different points view, such as lower cost and shorter installation time. In return for the advantages, stochastic performance wireless communication networks necessitates an advanced system immune to losses delays wirelessly transmitted data. This article proposes advancement distributed MMCs be utilized in submo...

<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...

This paper presents an innovative fabrication process for a planar circuits at millimeter-wave frequency. Screen printing technology provides low cost and high performance coplanar waveguides (CPW) lines in planar devices operated at millimeter-wave frequency up to 110GHz. Printed transmission lines provide low insertion losses of 0.30 dB/mm at 110GHz and small return loss like as impedance sta...

Wideband dual-polarization performance is desired for low-noise receivers and radiom eters at cent imete r and m illimeter wavelengths. The use of a waveguide orthomode transducer (OMT) can increase spectral coverage and sensitivity while reducing exit aperture size, optical spill, and instrumental polarization offsets. For these reasons, an orthomode junction is favored over a traditional quas...

This paper presents the design of a compact ultra-wideband (UWB) bandpass planar filter with a tunable notched band within the bandwidth. The filter can be used for wireless communications within the unlicensed UWB range (3.1-10.6 GHz). The UWB filter is based on external interdigitated quarterwavelength microstrip resonators and a central half-wave microstrip resonator embedding a reconfigurab...

This study reports the development of high efficiency polishing protocols of fibre connectors, by replacing the presents three step polishing with two step polishing protocols, and by using various abrasives as polishing mediums, to achieve necessary geometrical and optical qualities for physical contact transmission using a commercially available connector polisher. The study focuses on surfac...

A dual-mode broadband bandpass filter (BPF) with multiple controllable transmission-zeros using T-shaped stub-loaded resonators (TSSLRs) is presented. Due to the symmetrical plane, the odd-even-mode theory can be adopted to characterize the BPF. The proposed filter consists of a dual-mode TSSLR and two modified feed-lines, which introduce two capacitive and inductive source-load (S-L) couplings...