An accurate closed-form formula is derived from an analytical method to calculate dispersion properties of the substrate integrated waveguide (SIW). The equation which a function geometrical parameters used accurately estimate cutoff frequency dominant mode at low leakage condition. unit cell SIW can be considered as two consecutive rectangular sections with specific difference in their widths. propagation constant extracted by applying Floquet theorem overall transmission matrix single...

A frequency-selective power combiner/divider in single-layer substrate integrated waveguide (SIW) technology is introduced. The basic building block consists of a planar four cavity structure with three them operated SIW TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">101</sub> modes and one xmlns:xlink="http://www.w3.org/1999/xlink">201</sub> mode. Each coupled to port the unit. In addition overall configuration considers couplings each...

In this letter, we focus on the signal-to-interference-plus-noise ratio (SINR) enhancement using transmitting waveform covariance matrix optimization in colocated MIMO radars. our proposed algorithm, transmitted has been optimized to transmit beampattern into target direction and receiver, try reject maximum number of interfering objects. is able be synthesized with binary phase shift keying waveforms closed form. Simulation results show that method better SINR performance comparison methods...

This article introduces effective techniques to improve the stopband frequency response of substrate integrated waveguide filters. First, a filter is constructed by using different cavity resonators which resonate at same fundamental mode but high-order modes. A cascade connection circular and rectangular cavities used separate modes, because second resonant more than ones. Second, inserting transverse radiating slots proper positions cavities, their longitudinal modes are shifted down...

In this paper, an ultra-wideband (UWB) planar monopole antenna with impedance bandwidth from 2.83 to 11.56 GHz and dual band-notched characteristics is presented. The consists of a small rectangular ground plane, bat-shaped radiating patch, 50- Ω microstrip line. notched bands are realized by introducing two different types structures. half-wavelength spiral-slots etched on the patch obtain band in 5.15 5.925 for WLAN, HIPERLAN, DSRC systems. Based single UWB antenna, second etching folded...

This paper introduces effective approaches to improve the stopband response of substrate integrated waveguide filter. First, a filter is constructed by using different resonators which resonate at same fundamental mode but high order modes. As second resonant circular cavities more than rectangular ones, we cascade and separate Then inserting radiating slots proper positions cavities, their longitudinal modes are strongly rejected. Comparison between results verifies effectiveness proposed idea.

In this paper, two dimensional multi-port method is used to analyze substrate integrated waveguide by using Green's function approach obtain the impedance matrix of equivalent planar structure. Modes propagation constant waveguide, as a periodic structure, calculated applying Floquet's theorem on unit cell. Field distribution propagating mode obtained method. Results are verifled, in broad range dimensions, comparing with published results and also those commercial electromagnetic simulator,...

An effective technique to improve the stop-band frequency response of direct-coupled resonators in substrate-integrated waveguide (SIW) technology is introduced. Regular inductive-iris filters SIW are supplemented with H-plane frequency-dependent inverters which not only create transmission zeros but also serve as proper impedance inverter. A synthesis introduced prescribe at finite frequencies on either side pass band, symmetrically or asymmetrically. Two different topologies for X-band...

In this paper, β-ω of substrate integrated waveguide is studied. First, a unit cell the whole structure analyzed by mode matching technique. Then applying Floquet theory into solution process, dispersion characteristic periodic obtained and effects various parameters on response are described. Finally, proposed method validated comparing our results with other published Ansoft's HFSS.

Beam-pattern matching plays an important role in multiple-input multiple-output radars. In the vast majority of research done this area, aim is to find covariance matrix waveforms fed into transmit array. Also, reconfiguring a preset array antennas (antenna selection), which means turning <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</small> some array, effective technique reach desired beam patterns, dynamically. article, we introduce...

Recent studies on integrated circuits interconnections are mainly concentrated the analysis of crosstalk and delay, by taking trade-off between accuracy, speed, complexity into consideration. The new idea this paper is to apply convex optimization method analyze delay lossy coupled in identical non-identical forms. For purpose, a simple comprehensive model proposed cover functional dynamic computationally-effective way. More specifically, various case determined transient response...

Covariance matrix design and beamforming in multiple-input multiple-output (MIMO) radar systems have always been a time-consuming task with substantial number of unknown variables the optimization problem to be solved. Based on target conditions, can dynamic process real-time scenarios, it is critical fast beamforming. In this paper, we propose beampattern matching technique that much faster compared well-known traditional SQP (semidefinite quadratic programming) counterpart. We show how...

It is well-known that the availability of transmit and receive arrays in colocated multiple-input multiple-output radar systems can be exploited to detect multiple targets, estimate their range angular coordinates. Unluckily, accuracy achieved estimation target parameters severely affected by hardware nonidealities. The impact these nonidealities mitigated through adoption specific methods explicitly developed compensate for them, i.e., briefly, calibration methods. As far as we know, until...

4D-imaging mmWave radars offer high angular resolution in both azimuth and elevation, but achieving this requires a large antenna aperture size significant number of transmit and/or receive channels. This presents challenge for designing waveforms that must be separable on the side have low auto-correlation sidelobes. paper focuses an orthogonal set sequences radar sensors based PMCW technology. We propose Coordinate Descent-based iterative optimization framework optimizes phase-modulated...

In this paper, full-wave analysis of a microstrip-ring resonator capacitively coupled to Microstrip transmission line is presented. The method the based on spectral domain in rectangular coordinate system. Since system not compatible with ring structure, triangular basis functions have been utilized for current distributions surface. Applying Galerkin's domain, resonant frequencies structure and conductors are calculated effects various parameters studied. To verify analysis, our results...

In this article, two-dimensional analysis is proposed to calculate propagation constant of substrate integrated waveguide. First, the impedance matrix a unit cell structure waveguide calculated by employing desegmentation method. Then, fundamental mode obtained applying Floquet theorem on cell. Field distribution propagating also acquired. Our results show good agreement with published results. Comparison high-frequency simulator validates method for broad range dimensions.

ABSTRACT A wideband six‐port power divider/combiner with suitable coupling flatness is presented in substrate integrated waveguide (SIW) technology. The structure composed of six ports that are connected to a common central region. By introducing resonating cavities each port, the bandwidth and reflection SIW device can be enlarged. Unsymmetrical apertures lateral port arms used increase isolation between adjacent input output ports. prototype, operating at 12.5 GHz 10 percent bandwidth,...

In the context of spectrum reusing in Cognitive Radio (CR) networks, availability should be considered with respect to both space and frequency making Power Spectral Density (PSD) map concept. For this reason, sensed PSDs by distributed sensors area are collected fused a fusion center (FC). But, for given zone, PSD neighbor CR may contain shared common component while, can exploited theory source coding compress as much possible. compressive sensing (DCS) methods used here exploit...

In this paper, full wave analysis of substrate integrated waveguide is presented based on method moment in combination with mode matching technique. For purpose, input and output via pairs are terminated two sections. Waveguide width, as an optimization parameter, optimized to obtain the minimum reflection from waveguide. Field distribution structure, currents vias dispersion characteristic structure investigated. Our results compared other numerical techniques. Good agreement between...

In this article, the design and realization of waveguide filter with improved stop-band response is presented. By inserting transversal slots at proper position cavities, without disturbing field distribution dominant mode, second longitudinal resonant modes are radiated out. This caused out-of-band frequency to be improved. The validity proposed technique confirmed by comparison between measurement values simulation results from finite element method through commercial software (high...