In this paper, a novel hollow substrate integrated waveguide (HSIW) is presented for realizing low-loss millimeter-wave (mm-wave) transmission lines embedded in multi-chip modules. A new analysis method the HSIW proposed by treating it as combination of two-dielectric loaded rectangular (RWG) and standard waveguide, where an effective dielectric constant, ε <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">e</sub> , introduced. An prototype...

In this communication, a double-sided Taylor-distribution dielectric resonator antenna array using insular image guide (DIIG) is presented. Analysis of the (DIRA) performed with effective constant (EDC) method, verified HFSS™ simulations based on finite element method (FEM). order to enhance gain, DIRA made double-sided, i.e., mirror placed other side DIIG. The Taylor distribution technique employed here suppress sidelobes. Finally, 10-element linear fabricated and measured, high gain 15.8...

In this letter, a novel Optically Controlled BeamForming Network (OCBFN) is presented. A simplified circuit topology used, which comprises shared highly reflective Linearly Chirped Fiber Bragg Gratings (LCFBG), to reduce the network complexity while improving optical and electrical performances. The OCBFN also integrates capability of multiple beams for stream data transmit simultaneously. Theoretical analysis, calculation an experiment are carried out verify concept OCBFN. Results show that...

This letter presents a triple-quasi-TEM-resonance dielectric cavity for compact bandpass filter design. The proposed is silver coated and has three blind holes which form distinct quasi-TEM mode resonators. external coupling structure the resonator realized by tapping hole. inter-resonator couplings are controlled slots on outer surfaces of block. A three-pole with two controllable transmission zeros designed implemented. measured results agree well simulated results, verifying...

The problem of user selection and resource allocation for the downlink secure multiuser MISO-OFDMA systems overheard by multiple multi-antenna eavesdroppers is investigated. Based on zero forcing beamforming artificial noise (AN), a physical-layer security model proposed. Furthermore, original formulated as an AN aided secrecy rate maximisation problem, which maximises sum jointly designing covariance. However, non-convex hard to optimise in general. It shown that can be handled performing...

Substrate integrated waveguide (SIW) technology is combined with the classical theory of log-periodic antennas to realize SIW slot broadband performance. Based on orientation slots, two variations are compared - transverse antenna and longitudinal antenna. Both techniques achieve much wider impedance bandwidth than a traditional uniform slotted useful radiation pattern maintained over 4 GHz bandwidth. Two prototypes, centered at 15 24 GHz, have been fabricated measured verify simulations.

In this paper, a 6 × planar slot array based on hollow substrate integrated waveguide (HSIW) is presented. To eliminate the tilting of main beam, fed from centre at back HSIW, which results in blockage area. reduce impact sidelobe levels, extrusion technique introduced. A simplified multiway power divider demonstrated to feed elements and optimisation procedure described. verify antenna design, fabricated measured low temperature co-fired ceramic (LTCC) technology. The HSIW has lower loss,...

In this paper, a 6 × planar slot array based on hollow substrate integrated waveguide (HSIW) is presented. To eliminate the tilting of main beam, fed from centre at back HSIW, which results in blockage area. reduce impact sidelobe levels, extrusion technique introduced. A simplified multiway power divider demonstrated to feed elements and optimisation procedure described. verify antenna design, fabricated measured low temperature co-fired ceramic (LTCC) technology. The HSIW has lower loss,...

In this paper, a novel transparent thin film based on carbon nanotube (CNT) technology for radio frequency (RF) electromagnetic shielding is presented. The film, which assumed to be infinite in length and width tens hundreds nanometers thickness, consists of two layers CNTs perpendicular each other with distance host medium encloses the CNTs. effectiveness (SE) optical transmittance under normally incident plane-wave both simulated by CST, 3-dimentional full wave simulation software...

A hollow substrate integrated waveguide (HSIW) is proposed to realize low-loss millimetre-wave (mm-wave) transmission lines. 38 GHz slot antenna with a cavity bandpass filter fabricated in LTCC demonstrate the HSIW potential. The measured radiation pattern of matches well simulations. medium has great potential for further development and could be used passive elements such as filters, antennas power combiners future communications needs.

Abstract This paper presents a new design method of digital baseband signal for generating fully programmable optical frequency comb (OFC), which solves the problem how to optimally select when OFC is generated by binary modulation. The inverse Fourier transform used study waveform generate OFC. It found that number “0” bits determines flatness lines. Based on this, tunable ultra‐fine and ultra‐flat was obtained using containing large in experiment. saves substantial computing time resources...

In this paper, a double-sided dielectric resonator antenna array fed by insular image guide is proposed. A complete design process with theoretical calculation and 3D modelling simulation given. This 10-element has 15 dB gain at 60 GHz, which 2 enhancement over single-sided the cross- polarization suppressed more than 30 dB. Also, employment of an layer in guide, predicted efficiency as high 93%.

ABSTRACT In this article, a detailed theoretical analysis of the dielectric insular image guide (DIIG) is presented to provide solution for low‐loss millimeter‐wave (mm‐wave) transmission lines. The effective constant method utilized design DIIG prototype in Ka‐band, which then fabricated using standard low temperature cofired ceramic technique. Results from measurements agree well with calculations and simulations. A loss 0.012 dB/mm at 35 GHz achieved, indicates great potential further...

At present, the fixed spectrum allocation is accepted strategy employed by wireless industry and regulators a large number of resources have been wasted because traffic load variation in different heterogeneous networks. Through analysis recent research about dynamic (DSA), vertical handoff multi-mode base stations, authors proposed shared carrier network transformation (SCVNT) algorithm, which based on minimum total blocking probability (MTBP) or redundant channel difference (MRCD). In...

In this paper, novel RF distributed MEMS transmission line (DMTL) phase shifters based on rectangular and arched bridge-like coplanar waveguides (rec-BCPW arc-BCPW) structure are proposed the comparison of their configuration performance is also presented. A CST software used for modeling, simulation optimization from 30 to 40 GHz. Simulation results show that both rec-BCPW arc-BCPW make an improvement conventional shifter in S parameters. However, at ¿down¿ state 35 GHz resonant frequency,...

The coupling of Ultra Wideband (UWB) pulse entering cylindrical cavity connecting slot is simulated and analysed employing finite differential time domain (FDTD) method. Through frequency analysis, electric field for different UWB widths, resonant enhancement effects are investigated the characteristics resonance caused by also analysed.

This paper presents a design of dielectric waveguide filter using dual-mode resonators (DWRs). The is formed by ceramic monoblock, thus it compact and ease fabrication. employed degenerate modes DWR are TE101 TE011 mode, which can be coupled slot on the block. coupling between single-mode realized aperture slot. external silver-coated blind hole that aligns to mode for excitation. Transmission zero (TZ) flexibly generated above or below passband, changing relative position A sixth order...