Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
This paper presents a microstrip diplexer operating at 9.79 and 11.47 GHz. The proposed diplexer consists of two parallel coupled line band-pass filters (BPFs) designed using a randomly defined image impedance technique. Thus, suitable coupled line gap distance can be obtained for conventional wet-etching fabrication. This allows easy design and fabrication of the parallel coupled line type BPFs and...
This paper presents a pseudo-elliptic substrate integrated cross-coupled filter with two finite transmission zeros based on quasi-ridged resonators. The filter was designed and simulated at central frequency of about 5.8 GHz. It has a bandwidth of 400 MHz and exhibits good stopband rejection of 25 dB.
A diplexer for use in the communication system of an autonomous vehicle is designed for operation in the UHF (240–320 MHz) and GPS (1.2–1.6GHz) dual frequency bands and with isolation of better than 80dB. A lumped element model for the diplexer is first created and simulated. Based on the lumped element model, microstrip realization is then designed and simulated. All the diplexer designs are simulated...
This paper presents electromagnetic simulation of a dielectric-filled rectangular waveguide bandpass filter structure for modern wireless system applications. Two bandpass filters have been designed and simulated at centre frequencies of 11.85 and 14.25 GHz, respectively. A significant size reduction is achieved.
A finite element method (FEM) model-order reduction (MOR) methodology for the fast parametric sweep of geometrical features is presented. The proposed method first linearizes the otherwise non-linear FEM matrix dependence with respect to the geometry variation, and then uses a uniformly sampled balanced truncation proper orthogonal decomposition (BT-POD) reduction algorithm to expediently sweep over...
Frequency Selective Surfaces (FSS) are usually classified into two big groups depending on wether they are made of unconnected elements or connected elements. Close to their resonance frequency, the first type behaves like a band-stop filter while the second type like a band-pass filter. In this paper we propose a new type of surface made of Split Ring Resonators (SRRs) and, at the same time, Complementary...
Envelope-tracking marching-on-in-time (ET-MOT) solution of the combined-field integral equation is compared to its traditional time-domain (TD) counterpart. ET techniques are generally more efficient than TD ones for band-pass scattering analysis because they can use larger time-step sizes that are constrained by the bandwidth rather than the maximum frequency component of the fields/currents. Yet,...
This paper presented the development of a miniaturized slot antenna, and its length is smaller than quarter wavelength, with a coplanar transmission line-based matching circuit on a printed circuit board. The matching circuit is realized by applying 2-stage band-pass filter (BPF). Moreover, we realized a dual band frequency characteristic in order to separate the uplink and downlink, which is suitable...
A robust and computationally efficient technique for design optimization of microwave structures is proposed. We exploit co-simulation-based surrogate models with the essential couplings evaluated using EM solver and most of the designable parameters modelled by distributed circuit elements with physical dimensions corresponding to those of the structure being optimized. Good prediction capability...
In this paper, a new metamaterial (MTM) unit cell implemented in a microstrip transmission line configuration is proposed. Reconfigurable metamaterial-based Composite Right/Left Handed (CRLH) microstrip transmission line, with one-side etching and no via, is presented here for the first time. As a result, it is easier to fabricate and more convenient for integration. By incorporating varactor diodes,...
This paper discusses the use of dielectric superlayers to shape the radiation pattern of focal plane feeds of a multi-beam reflector system. The shaping of the pattern is obtained by exciting a pair (TE/TM) of leaky waves that radiate incrementally as they propagate between the ground plane and the super-layer. Using the super-layers, it is possible to reduce the spillover from the reflectors without...
This paper presents a third order ultra-wideband filter (3.1 GHz – 10.6 GHz) with a reconfigurable WLAN notch at 5.8 GHz. Filter reconfiguration in practice may be achieved by a switching element such as RF MEMs, a PIN diode or an optical switch. The switching element was modeled in simulation as a variable conductance line. The filter response shows a sharp rejection of the WLAN band and very low...
This paper proposes a novel dual-passband filter based on a Chebyshev filter architecture. The two passbands can be independently tuned to desired frequencies. Also, the filter has the ability to provide matching to impedances with high real values at both frequencies which was impossible in previous design methodologies. This novel feature eliminates the need for further impedance matching through...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.