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Flexible inkjet-printed sensor platforms fabricated on flexible substrates are demonstrated to be a sustainable economical solution for 2D “Zero-Power” sensing and active energy harvesting applications as well as multilayer 3D structures and complete radar systems. Several designs featuring the advantages, challenges and prospects of inkjet printing technology are presented. These designs demonstrate...
Substrate Integrated Waveguide, an emerging technology for microwave and mm-wave circuits, merges the advantages of planar manufacturing techniques (e.g. cost, weight, integration) while offering some benefits of tradition all-metal waveguides (e.g. high quality factor). However, a limit to the integration possibilities is posed by the lateral leakage, a typical aspect of Substrate Integrated Waveguide,...
In this paper, we present a frequency-agile microstrip patch antenna printed on a new soft elastomeric polyurethane (PU) substrate (εr ≈ 3.5 at 10 GHz). Membrane suspended over an air cavity technology is used to increase the antenna efficiency (η ≈ 31.7%) in frequency X band and adds a supplementary degree of freedom in the purpose of frequency agility. The membrane deflection is realized by electrical...
In this paper, a dual-frequency substrate integrated waveguide (SIW) cavity backed slot antenna has been presented. The unique slot structure includes a pair of slot stubs connected at the center of the radiating slot which helps to create an additional hybrid mode resonance at the higher frequency end. As a result, the antenna resonates at two different frequencies 8.96 GHz and 15.84 GHz with a bandwidth...
This paper presents a small size 60 GHz Antenna-on-Chip (AoC) designed and fabricated using 0.18 um TSMC Complementary Metal Oxide Semiconductor (CMOS) process. AoC performance is enhanced using asymmetric Artificial Magnetic Conductor (AMC). The AoC area including the AMC is 1715 um by 710 um. As AMC shields AoC from the lossy CMOS substrate, simulated gain of −0.25 dBi is achieved at 60 GHz for...
The method of the split cylinder resonator cavity (SCR) is used to characterize accurately and simultaneously in one temperature cycle, dimensional and electrical characteristics of the cavity and the electromagnetic properties of a dielectric material. To do this several modes are used, some to control the cavity and others to control the sample.
An accurate characterization of microwave materials is essential for reliable high frequency circuit design. This paper presents a measurement setup, which enables a quick and accurate determination of the relative permittivity of dielectric bulk materials up to 110 GHz. A ring-resonator is manufactured on a well characterized substrate dealing as reference resonator. The Material Under Test (MUT)...
We present in this paper a new passive ceramic corrosion sensor which can be integrated into a structure submitted to a corrosive environment. The corrosion detection mechanism is based on the modification of a resonator frequency as a function of the corrosion level. An alumina substrate is covered with a metal enclosure that is protected against corrosion apart from the middle of the top face. This...
This paper presents the design, manufacturing and testing of a MEMS SP16T switch to be used in open loop reconfigurable antenna systems. It consists of the hybrid integration of #5 MEMS SP4T switches (realized on HR Silicon substrate) on a multilayer substrate. The bilayer structure allows one to avoid RF and DC signal crossovers that could degrade the switch performance. The device is provided with...
A high ratio Wilkinson power divider is produced by cascading low ratio dividers. Combining two 1∶2 and one 1∶3 divider results in a 1∶8 ratio. Theoretically the 1∶8 divider has an S21 of −0.51dB and an S31 of −9.54dB. Under simulation the average S21 over a 1.7–2.7GHz band was −0.7dB and the S31 −10.3dB. A prototype was built on standard 1.6mm FR4 substrate. The 1∶3 divider uses stacked substrates...
This paper presents a study that improves the radiation efficiency and the sidelobe level (SLL) of a composite right/left handed (CRLH) substrate integrated waveguide (SIW) leaky-wave antenna (LWA). Because of the constructive electric field interference on each interdigital slot of a SIW from short-end, a CRLH SIW LWA can have higher radiation efficiency. In addition, controlling leakage amount of...
Carrier transport parameters of graphene grown by chemical vapor deposition (CVD) and graphene-metal contacts are extracted from microwave measurements in the frequency range 0.1–20 GHz using Corbino disks. It is shown that the charged impurities are effectively screened by the high permittivity of the SrTiO3 substrate. In the case of fused silica substrate the charged impurities are not completely...
In this work, we present both fabrication process and characterization of graphene field-effect transistors. Large scale monolayer graphene was grown by chemical vapor deposition (CVD) on Cu foils and transferred over pre-patterned back-gated devices on Si/SiO2 substrate. Scanning electron microscopy, Raman spectroscopy and Hall effect measurement were used for characterizing graphene quality before...
In this paper we extend a recently published mode-matching and method of moments hybrid technique that efficiently analyzes substrate integrated waveguide (SIW) devices. That method included two fast frequency sweep schemes and already considered the conductor and dielectric losses in the SIW structure. However, it neglected the potential leakage problem due to the periodic gaps. Here a more rigorous...
The substrate integrated waveguide can easily be integrated with planar microwave circuits. Antennas designed on this transmission line have a planar structure, and can be fabricated by a standard PCB technology, so they are suitable for mass production. This paper presents the results of an investigation of leaky wave antennas designed on a substrate integrated waveguide. The interest is given to...
Aerosol jet printed 3-D coplanar waveguides up to 50 GHz are demonstrated in this paper for the first time featuring a multilayer aerosol jet deposition process. The aerosol jet printing utilized in this paper is the first aerosol jet process to demonstrate multilayer deposition with bi-materials and is host substrate independent. The paper provides an insight into the fabrication process, the technology...
This work presents a novel class of filters in substrate integrated waveguide (SIW) technology, based on a multilayered configuration. The peculiarity of these filters is the presence of additional poles and zeros, due to the resonant slot etched in the common metal layer between two dielectric substrates. In this way, a filter with two mono-modal cavities, coupled by a resonant slot, exhibits a frequency...
A low cost, fully planar tunable oscillator with a low phase noise, high DC-RF conversion efficiency for C-band is presented in this work. The proposed oscillator utilizes a novel complementary coupled resonator based on substrate integrated waveguide (SIW) that has a broad tuning range of 8.84% relative bandwidth, and thereby achieves a continuous tuning oscillation range from 4.85 GHz to 5.1 GHz,...
A compact diplexer fabricated on substrate-integrated waveguide (SIW) technology is presented. The diplexer is a sixth order coupled-resonator network with no additional elements such as power dividers, composed exclusively of three dual-mode square SIW cavities. The coupling between the two orthogonal resonant modes of each cavity is generated by means of additional vias perturbing the cavity symmetry,...
There is an increasing interest in developing miniaturized antennas for ultra-low power applications (tens of μW) in the microwave range. However, to guarantee the system operations in such low-power conditions, radiation performances need to be preserved even if the adopted antennas dimensions are small compared to the wavelength. For this purpose, magneto-dielectric materials are currently exploited...
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