A5062787224- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Photonic and Optical Devices
- Electromagnetic Compatibility and Noise Suppression
- Gyrotron and Vacuum Electronics Research
- Photonic Crystals and Applications
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Radio Frequency Integrated Circuit Design
- Millimeter-Wave Propagation and Modeling
- Advanced Fiber Optic Sensors
- Ultra-Wideband Communications Technology
- Electromagnetic Simulation and Numerical Methods
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Microwave and Dielectric Measurement Techniques
- Acoustic Wave Resonator Technologies
- 3D IC and TSV technologies
- Optical Network Technologies
- Optical Coatings and Gratings
- Particle accelerators and beam dynamics
- Electronic Packaging and Soldering Technologies
- Power Line Communications and Noise
- Educational Technology in Learning
- Full-Duplex Wireless Communications
Universidad Publica de Navarra
2015-2024
Universidad de Navarra
2006-2022
Universitat Autònoma de Barcelona
2005
Universidad de Sevilla
2005
In this paper, a new approach for the development of planar metamaterial structures is developed. For purpose, split-ring resonators (SRRs) and complementary (CSRRs) coupled to transmission lines are investigated. The electromagnetic behavior these elements, as well their coupling host line, studied, analytical equivalent-circuit models proposed isolated SRRs/CSRRs. From models, stopband/passband characteristics analyzed SRR/CSRR loaded derived. It shown that, in long wavelength limit,...
The electromagnetic theory of diffraction and the Babinet principle are applied to design artificial metasurfaces metamaterials. A new particle, complementary split rings resonator, is proposed for with high frequency selectivity planar metamaterials a negative dielectric permittivity. Applications in fields selective surfaces polarizers, as well microwave antennas filter design, can be envisaged. tunability all these devices by an dc voltage also achievable if particles etched on...
In this paper, we present a new parallel-coupled-line microstrip bandpass filter with suppressed spurious passband. Using continuous perturbation of the width coupled lines following sinusoidal law, wave impedance is modulated so that harmonic passband rejected while desired response maintained virtually unaltered. This strip-width does not require parameters to be recalculated and, way, classical design methodology for coupled-line filters can still used. At same time, fabrication resulting...
The main aim of this paper is to demonstrate the potentiality sub-wavelength resonators, namely, split-ring complementary and related structures suppression undesired spurious bands in microwave filters, a key aspect improve their rejection bandwidths. relevant characteristics cited resonators are dimensions (which can be much smaller than signal wavelength at resonance) high-Q factor. This allows us design stopband with significant levels, few stages, small dimensions, which integrated...
In this letter, spurious passband suppression in microstrip coupled line band pass filters by means of split ring resonators (SRRs) is demonstrated for the first time. By etching SRRs upper substrate side, close proximity to conductor strip, strong magnetic coupling between and rings arises at resonant frequency SRRs. This inhibits signal propagation vicinity that frequency, allowing rejection undesired passbands properly tuning To test novel technique, we have designed fabricated two...
We propose a novel experiment, the Canfranc Axion Detection Experiment (CADEx), to probe dark matter axions with masses in range 330-460 $\mu$eV, within W-band (80-110 GHz), an unexplored parameter space well-motivated window of Quantum ChromoDynamics (QCD) axions. The experimental design consists microwave resonant cavity haloscope high static magnetic field coupled highly sensitive detecting system based on Kinetic Inductance Detectors via optimized quasi-optics (horns and mirrors)....
A method to achieve the rejection of multiple spurious passbands in parallel-coupled-line microstrip bandpass filters is proposed. As it was previously demonstrated by authors, using a continuous perturbation width coupled-lines following sinusoidal law, wave impedance can be modulated so that first undesired harmonic passband filter rejected, while desired maintained virtually unaltered. In this letter, scope extended reject employing different periods each coupled-line section tuned bands...
We report on a time-domain analog in microwave lines to the spatial Fraunhofer (far-field) diffraction paraxial conditions. Microstrip are used design filtering configurations acting as spectrum analyzers. They based linearly chirped distributed Bragg coupling between fundamental microstrip mode and same but counterpropagating mode. Linearly continuous impedance modulation line with varying upper plane strip-width is shown yield mode-coupling location group delay frequency. Under condition...
Transduction of magnetoinductive waves (MIWs) in planar technology is demonstrated. A transducer consisting a one-dimensional periodic array metallic split squared ring resonators (SSRR), placed between pair microstrip lines on substrate has been fabricated and measured. The are inductively coupled to the SSRRs located at ends excite MIWs that propagate along array. theoretical model for dispersion used predict relation delay time device. was measured good agreement found with predictions....
Photonic bandgap (PBG) structures in microstrip technology have been recently proposed as efficient Bragg reflectors. The periodic patterns employed until now were formed by a distribution of nonconnected holes (cermet topology) etched the ground plane or drilled dielectric substrate, giving rise to single-frequency-tuned band In this letter, novel pattern that follows continuous profile (network is simultaneously reject multiple frequency bands. It addition various sinusoidal functions...
In this paper, a compact and narrowband microstrip band-pass structure based on complementary split-ring resonators (CSRRs) etched in the back metal level (ground plane) is presented. Specifically, two-stage CSRR-based device, where series gap output CSRR stage two shunt stubs are added input cell. By these means we obtain narrow quite symmetric structure. A prototype device with 2% fractional bandwidth has been designed fabricated for operation at S-band. The dimensions of as small 14.6 ×...
We propose and demonstrate an electronic system achieving continuously tunable time-delays with nanosecond-scale delay excursions for ultra-wideband signals. Our demonstration yields adjustable of up to 1.6 ns input signals spanning 3 7 GHz. The key component is a dispersive length microstrip line created by etching chirped electromagnetic bandgap structure in the conducting strip.
In this paper, a groove gap waveguide (GGW) low-pass filter is proposed for the first time. Gap technology represents an interesting alternative as low-loss, cost-effective, high-performance transmission line and packaging solution microwave millimeter-wave systems. This may exhibit frequency behavior similar to rectangular but with some advantages such no need of electrical contact between upper lower plates GGW, making it attractive in design satellite devices at high frequencies. However,...
Sinusoidal and triangular patterns etched in the ground plane of a microstrip line are proved to suppress periodicity frequency response that arises recently proposed photonic bandgap structures with discrete periodic patterns. Experimental data show reduction harmonic level around 50 dB for novel proposed. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 25: 33–36, 2000.
In this paper, we report on a design method for chirped delay lines (CDLs) in microstrip technology. They consist continuously varying strip width, so that the coupling location between quasi-TEM mode and same but counter-propagating is linearly distributed frequency. High delay/spl times/bandwidth products, over frequency ranges of several gigahertzs, can be obtained following procedure. Experimental data confirm method. Real-time Fourier analysis wideband pulses performed using these CDLs.
In this letter, a new technique is proposed for the design of compact high-power low-pass rectangular waveguide filter with wide spurious-free frequency behavior. Specifically, intended suppression fundamental mode over band in much higher power applications than classical corrugated same specifications. Moreover, length dramatically reduced when compared to alternative techniques previously considered.
In this paper, two novel compact diplexers for satellite applications are presented. The first covers the Ku-band with closely spaced channels (Ku-transmission band: 10.7-13 GHz and Ku-reception 13.75-14.8 GHz). second is wider than (overall bandwidth up to 50%) achieves suppression of higher order modes, Ku/K-band a reception channel between 17.2 18.5 GHz. Both composed bandpass filters, joined together an E-plane T-junction. filters designed by combining low-pass filtering function (based...
Abstract In this paper, a W-band 3D-printed bandpass filter is proposed. The use of higher-order TE 10 n modes in groove gap waveguide (GGW) technology evaluated order to alleviate the manufacturing requirements. addition modes, coupling between them analyzed detail improve overall fabrication robustness component. This allows implementation narrow-band filters operating at millimeter-wave frequency bands (or above), which usually demand complex techniques provide high accuracy required for...
In this article, a novel design method for rectangular waveguide filters intended fabrication using direct metal additive manufacturing (AM) is proposed. The synthesized will feature smooth profile that allows us to fabricate them orienting the filter propagation axis in vertical building direction, achieving an optimum configuration AM fabrication. valid any all-pole transfer function, which initially implemented with commensurate-line distributed unit element prototype. impulse response of...
Novel wide rejected band devices are obtained using chirping techniques in one-dimensional photonic bandgap microstrip structures with the ground plane etched following a periodic pattern. Full-wave electromagnetic simulations and measurements provided to compare frequency responses of linearly varying period (chirped devices) those constant (nonchirped or conventional devices), showing increased bandwidth obtained. ©2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 24: 357–360, 2000.
In this paper, we present an exact analytical solution for the inverse scattering problem formulated by using coupled-mode theory in microwave range, assuming single-mode operation. The is a series that gives required coupling coefficient device as function of target frequency response. A clear physical meaning terms discussed, and several useful properties synthesis are given, thus providing deep understanding mechanics. method allows design devices with arbitrary response only constrained...
In this paper, a method to design high-power low-pass harmonic filters in rectangular waveguide technology is proposed. The new consist of collection smooth E-plane bandstop elements along the propagation direction and variation filter width. This yields broad rejected band for fundamental TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> mode, together with higher-order ( xmlns:xlink="http://www.w3.org/1999/xlink">n0</sub> non- ) mode...
A novel coplanar waveguide (CPW) low pass filter based on electromagnetic bandgaps (EBG) with double periodicity has been designed and fabricated. The device consists a CPW T-shaped loading capacitances at periodic positions slot width modulation. By properly choosing the ratio between two periods of structure, huge band gap (more than five times bandwidth) is obtained through suppression spurious frequencies. fabricated prototypes also exhibit very sharp cutoff, insertion loss in passband...
Coplanar waveguide (CPW) band pass filters consisting on signal-to-ground wire connections alternating with series gaps, and split ring resonators (SRRs) etched in the back substrate slide, underneath slots, are presented for first time. It is demonstrated that by properly tuning SRR dimensions, a narrow below cutoff frequency of wired/gaped CPW structure can be obtained. The relevant characteristics designed are: insertion losses 4 dBs allowed band, out rejection above 30 dBs, very high...