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This paper describes novel integrated transmission lines base on slotted-floating shield for ultra-wide band operation a millimeter-wave frequencies. The designed structures con sist of two main conductors used for signal and ground along with a floating conductor, which improves the per formance of the line. The implemented designs increase th line-impedance and reduce the wavelength of the guided...
Precise measurements of the surface impedance Zs of conducting, semiconducting and superconducting materials is a common requirement for research, metrology and industry. The interest is often devoted to thin films because of (i) the possibility to grow nearly-perfect (single-crystalline) materials, essential for research and selected applications, or (ii) ease of reproducibility for, e.g., metrological...
In this research work, the design characterization of metamaterial absorber has been investigated for X-band applications. For this purpose, a primary regular decagon shaped loop structure has chosen and its multi band response has been studied and analyzed. The simulated results show that absorption peaks occur at 8 GHz, 10 GHz and 12 GHz with absorbance peak response of 96 %, 93.36 % and 91.88 %...
This work explores the feasibility of temporary implantable devices utilizing an inorganic material as the core structural element. A biodegradable glass material was used as the substrate for the devices. A device test structure composed of two thin film elements, an insulating layer and a pair of metal electrodes, was formed on the biodegradable glass substrate. The devices were then subsequently...
A microstrip patch antenna is a planar directional antenna in which a metal patch is placed on top of a dielectric substrate which in turn is placed on top of a metal ground plane. The power transfer between a source and antenna is done through a feed line. In general, the characteristic impedance of a transmission line is 50 ohms. By maximum power transfer theorem, the patch antenna should be fed...
In the paper, a simple structure is designed to realize a relative wide tunable electromagnetic absorbing in the S-band. The structure consists of rectangle metal patch with slots, FR4-substrate and a varactor. By regulating the DC voltage, the capacitance value of the varactor can change from 1pF to 5pF, resulting the absorbing frequency varying from 3.37GHz to 2.48 GHz, the relative bandwidth can...
A novel impedance matching method of a helix antenna is proposed in this paper. The conventional impedance matching of a helix antenna is based on the method of adjusting the thickness of the substrate and making a tapered transition between the helix antenna and the coaxial cable. However, these methods are not easy to be controlled. This paper designed an improved impedance matching method, using...
A small antenna MACKEY (Metamaterial Antenna Chip developed by KIT EOE LaboratorY) consists of substrates that are metal plate loaded capacitance grids using AMC (Artificial Magnetic Conductor) substrate and dipole antenna is showing a characteristic distribution from the principle of operation, it is possible to be installed on a metal plate without affecting the characteristics of impedance and...
Co-Design with Optimization of Physical Plane Layout in FCBGA substrate is imperative for the high-speed chips to perform the best performance. It was found that ground metal plane void (anti-pad) under ball pads and core via pads had correlation with insertion and return loss. We focused on optimizing metal and trace layout of the high-speed signal net, also known as SerDes (Serializer-Deserializer)...
Various domestic appliances that can use WiFi are becoming more common. Therefore, it is necessary to establish a design method for installing a small antenna within these appliances. In this paper, a model that has a dipole antenna unified with an artificial magnetic conductor (AMC) substrate inspired small antenna is proposed, and its radiation and impedance characteristics are shown.
Radiation characteristics of an input decoupling network for switching DC-DC converters are analyzed by a set of electromagnetic (EM) simulations. Input decoupling network is a part of a DC-DC converter with a dominant contribution to its radiated emissions. The impact of geometrical parameters of an input decoupling network such as the dimensions of metal plates on a printed circuit board (PCB),...
Various domestic appliances have become wireless, and it is necessary to establish a design theory for a small antenna. In this report, we suggest a model that has a dipole antenna unified with an AMC (Artificial Magnetic Conductor) substrate, and we show that the AMC substrate becomes a wide-plate dipole and operates as a radiation element.
Technology scaling allows the use of commercially available processes for 60 GHz band applications, but introduces more and more physical constraints. If not taken into account in early design stages, technology constraints can severely impair the performance. Two 60 GHz power amplifiers have been designed in novel technology-aware design flow, which provides insight into small and large signal relationships...
This paper provides simulated results of the impedance characteristics and the radiation patterns of dipole antennas on AMC substrates with different design parameters and different substrate size.
Development of wireless technologies pushes for more accurate and more consistent EMC measurements. Antenna cross polarization is found to be a main contributor to the measurement errors. In this paper, full-wave analysis of E-field distribution of various slotlines is presented, which reveals that the bilateral tapered slot antenna has the widest impedance bandwidth and the lowest cross-polarization...
We present the design and development of a compact Wilkinson power divider on a multilayer organic Liquid Crystal Polymer (LCP) substrate. The experimental results demonstrate that the power divider has achieved a size reduction of 97.5% compares to conventional microstrip Wilkinson power divider design at a center frequency of 1.1 GHz. Based on a 15- dB input return-loss criterion, the power divider...
A square cross section planar helix with straightedge connections has been simulated with a cylindrical electron beam for traveling-wave tube amplifier application. The saturated output peak power varies from 0.65 W to 2.58 W over the frequency range of 85–110 GHz. The maximum electronic efficiency is 7.3 % at 97.5GHz for a beam of 5.8 kV and 8 mA.
In this work a high gain 16 element planar array operating in X-band was designed and optimized. The feeding network of the array was designed using suspended substrate striplines in order to reduce the feeding network losses as much as possible and by doing so to achieve a high radiation efficiency.
To provide the requested high band-widths for modern communications the combination of optical and wireless links in Radio-over-Fiber systems (RoF), is expected to be an essential part of next generation wireless communication systems. A crucial part of these links is the broadband optical receiver transforming the signal from high optical to millimeter-wave frequencies at each base station. A new...
This paper describes a largely deformable surface electrode based on poly-dimethylsiloxane (PDMS) substrate, including its fabrication, electrochemical characterization, adhesion test, and bending test results. The fabricated electrode is made of both PDMS and parylene C layers, which are completely attached to each other. Between the two parylene layers gold patterns are located in the mechanical...
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