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Thanks to the revolution in electronics and telecommunications, there is a proliferation of devices for medical applications and others operating in the body area. There is a novel way to connect two transceivers with the human body as a communication channel by body capacitive coupling. BCC (Body Coupled Communication) is a technology that uses the human body as an electric field propagation medium...
As part of ONR's Integrated Topside (InTop) Program, in 2014 Northrop Grumman delivered a bi-static, active, electronic scanned array (AESA) system, capable of multifunction, simultaneous transmit and receive operation. The system is wide band, transmits high power and has high receive sensitivity. Further, there are simultaneous transmit and receive modes required, in which the transmit AESA radiates...
This paper presents a third-order digital tunable bandpass filter based on digitally tunable capacitor loaded open ring resonator. Magnetic dominated mixed coupling is utilized to make the coupling coefficient meet the requirement of stable bandwidth response. Electric source-load coupling is designed to generate a transmission zero for improving the frequency selectivity. This filter is designed,...
This work proposes single crystal X-cut thin film Lithium Niobate (LN) resonators operating in a shear horizontal (SH0) acoustic plate wave mode to achieve a high electromechanical coupling coefficient. In the fabrication process, we take advantage of the off-the-shelf single crystal X-cut LN dies on which surface micromachining technology is used to fabricate the devices. We design two fabrication...
In this paper, we report on a reconfigurable bandpass filter for X-band applications. The filter is composed of coupled X/2 microstrip line resonators. Center frequency tuning of each resonator is achieved using an RF switch based on a phase change chalcogenide compound, germanium telluride, which switches in and out a loading capacitor. A combination of electric and magnetic coupling between the...
To measure biopotentials, a measurement method with a passive LC filtering is presented. The measuring system consists of two sections: an implantable sensor section and an inductive coupled readout circuit. The proposed sensor section consists of an inductor that receives power from outside of the body and a LC filter with which the received signal is filtered. This filter consists of an inductor...
By using highly efficient electrical drive systems in modern vehicles, different voltage levels for the drive system and other electronic devices are applied. In the most automotive HV components which contain sensors or contactors, e.g. in a HV-battery device, both voltage levels are interconnected and concentrated in a small space. Regarding Electromagnetic Compatibility (EMC) aspects, the decoupling...
The use of capacitive-piezoelectric transducers, formed by separating a piezoelectric structure from its electrodes by sub-micron gaps, has raised the measured quality factor of aluminum nitride (AlN) Lamb wave resonators (LWR) from the ∼1,000 of typical square-edged conventional devices (with contacting electrodes) to over 5,000 at 940 MHz, posting the highest reported Q for non-overmoded pure AlN...
A method is developed and validated to empirically characterize unwanted spectral coupling from a non-ideal power supply bias to the radio frequency (RF) output for solid-state high-power amplifiers (HPAs) operating in saturation. Specifically, the method currently addresses how power supply ripple amplitude modulates the RF carrier output by characterizing an amplitude modulation bias coupling (AMBC)...
This study presents a dual-band rat-race coupler featuring two controllable center frequencies with arbitrary power-split ratios. Novel dual-band stub-loaded 90° lines were used to replace the conventional single-band 90° lines according to the required branch impedances for specific power-split ratios. The proposed structure has two degrees of freedom, providing more design flexibility and obtaining...
In new circuits performed with 3D integration technology, electromagnetic interference through stacked silicon substrates may occur due to signals propagated in Through Silicon Vias (TSV) and along Redistribution Layers (RDL). So, to optimize electrical performances of these new 3D digital or RF circuits, substrate coupling effects need to be characterized, modeled and quantified in a large frequency...
Distribution transformers are generally assumed to block high frequency power line carrier signals and to require bypass networks where signals must cross a transformer. In this work, however, we show experimentally that significant coupling occurs at some frequencies both across distribution transformers and between different transformer phases in various commercial transformers. This suggests that...
Experimental measurements of the isolation provided by N and P-type rings, and triple-well structures implemented in 0.35 ??m and 0.18 ??m technologies are presented. The results obtained are compared to previous experimental works on isolation, and the conditions that affect the efficacy of the isolation techniques are discussed, as well as their dependence with frequency.
A broadband reconfigurable coupler has been realized at Ku band making use of RF-MEMS switches. The coupler is directly printed on the same Silicon substrate on which the MEMS are built. The device works at 16-20 GHz, and it is designed to provide two different coupling levels of -10 dB and -17 dB, maintaining good matching and isolation in both states. Performance significantly matches the simulations,...
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