scispace - formally typeset
Search or ask a question

Answers from top 9 papers

More filters
Papers (9)Insight
Journal ArticleDOI
Chung-Hao Chen, Dimitrios Peroulis 
10 Dec 2007
78 Citations
Simpler materials such as water are proven to be very effective for wideband absorptive switches.
This concludes that the additional top membrane does maintain the good electromechanical and RF performance of MEMS capacitive switch.
RF MEMS capacitive switches based on leaky nanodiamond dielectric are, therefore, more reliable than those with Si3N4.
The switches demonstrate good RF performance and high switching speeds.
The upgraded RF-MEMS switches are capable of satisfying the growing need of cutting edge performance for 5G or high-performance applications.
Compared with traditional MEMS capacitive switches with dielectric material Si3N4 and a relatively lower gap (1.5 µm), the proposed MEMS switches exhibit high on/off capacitance ratios.
Several membrane-type capacitive switches have been fabricated showing excellent RF performance and dynamic responses similar to those on semiconductor substrates.
Proceedings ArticleDOI
Shaochun Cao, Liping Sun, Michel Savoie 
19 Jul 2010
10 Citations
Compared to the TIR switches, the advantages of these MZI-based switches include simple electrode fabrication, ease of fabrication tolerance, and high on-off extinction ratio.
The benefits of RF MEMS switches are their low on-impedance, high off-impedance, highly linear behavior, and, in many cases, nearly zero power consumption (Rebeiz, G. M.

See what other people are reading

How is data transmitted wirelessly from a metering module?
5 answers
Data is wirelessly transmitted from a metering module through various methods outlined in the research papers. The wireless transmission systems involve components like sensors, transmitters, receivers, and processors to facilitate data transfer. These systems utilize technologies such as NB-IoT, radio frequency communication, and WiFi modules to enable seamless data transmission. For instance, the use of radio frequency transmit-receive chips, front-end modules, and antennas in the wireless communication module ensures effective communication within specific frequency bands. Additionally, the incorporation of filtering modules helps reduce signal interference during data transmission, enhancing the overall reliability of the wireless data transfer process. The Sub-1GHz wireless modules play a crucial role in automatically collecting metering data and transmitting it to designated receivers.
What is Fractional radiofrequency?
5 answers
Fractional radiofrequency (FRF) is a minimally invasive technology used for various skin conditions. It involves the insertion of needles or electrode pins into the skin, allowing a radiofrequency current to flow through for collagen remodeling. FRF has been shown to improve skin laxity, treat aging-related skin conditions like rhytids, and is effective for scar treatment. Studies have demonstrated significant improvements in acne scarring with FRF treatments, with high patient satisfaction and minimal pain reported. Despite its efficacy, there is a need for standardized protocols and further well-designed trials to establish clear guidelines for the safe and effective use of FRF in skin rejuvenation.
What are the green technology for energy harvesting available?
5 answers
Green technology for energy harvesting includes utilizing IT for capturing energy from renewable sources like sunlight and wind, enabling energy-efficient systems like intelligent grids. Additionally, materials like graphene are being explored for energy storage devices, along with machine learning for intelligent storage management systems. Energy harvesting systems based on electromagnetic and piezoelectric effects have been developed, offering new possibilities for green energy sources and powering low-energy devices. Furthermore, novel power harvester designs using in-plane capacitive transducers for harvesting energy from ambient vibrations are being researched, providing sustainable power for low-power electronic devices and wireless sensor networks. These technologies collectively contribute to a more sustainable and efficient energy harvesting ecosystem.
How does flexi force sensor to measure center of pressure for jockeys?
4 answers
Flexible pressure sensors play a crucial role in measuring the center of pressure for jockeys. These sensors offer high sensitivity and flexibility, making them ideal for such applications. By utilizing innovative materials and structures, such as liquid metal microchannels, porous ionic membranes, and ionic nanofiber membranes, these sensors can detect tactile pressure with remarkable sensitivity and rapid response times. Additionally, incorporating multiple strain grids for pressure and shear force detectionenhances the sensor's ability to precisely measure the center of pressure. The combination of these advanced technologies allows for accurate and reliable center of pressure measurements for jockeys, ensuring optimal performance and comfort during horse racing.
How does FlexiForce sensor to measure center of pressure for jockeys?
4 answers
FlexiForce sensors can measure the center of pressure for jockeys by utilizing innovative designs and materials. One approach involves a flexible pressure sensor based on a porous ionic membrane, enhancing sensitivity and widening the pressure range. Another method includes a sensor with a liquid metal microchannel, where adding an amplification layer improves sensitivity, making it suitable for applications like sensing pressure on a mechanical gripper. Additionally, a flexible pressure-sensitive sensor with a polyurethane foam body and inductive coating offers flexibility, high sensitivity under pressure, and repeatability, making it ideal for sensing micro-pressure and designing devices with various sensitivities. Furthermore, a highly sensitive pressure sensor with an ionic nanofiber membrane and ITO-PET electrodes enables the detection of low tactile pressure with rapid response times, promising applications in wearable electronics.
How does the weather affect the signal strength and quality in point-to-point microwave communication systems?
4 answers
Weather conditions play a crucial role in influencing signal strength and quality in point-to-point microwave communication systems. Studies have shown that factors like atmospheric humidity, temperature, and wind speed impact signal intensity. Higher humidity levels can weaken signal strength, while higher temperatures can enhance it. Additionally, weather conditions such as rainfall can lead to packet losses in wireless connectivity systems. To mitigate challenges like interference and protocol sharing in D2D communication, a hybrid band sharing algorithm considering weather parameters like rain and fog has been proposed, showing improved performance under various weather conditions. Overall, understanding and accounting for weather variables are essential in optimizing the performance and reliability of point-to-point microwave communication systems.
What is the size of a photonic recticle?
4 answers
The size of a photonic reticle can vary depending on its specific application. For instance, a novel reticle designed for a photoelectric auto-collimation system has a diameter of 11 mm and features four transverse scales with a width of 0.05 mm each, ensuring an error of no more than 0.001 mm. In the context of photonic integrated circuits (PICs), the footprint of components is a limiting factor due to the wavelength of light, with approaches like overlaying and widening waveguides in adjacent reticles to enable seamless scaling beyond single-reticle limits. Additionally, the design, fabrication, and characterization of a nanophotonic device involving a two-dimensional photonic crystal lens in silicon-on-insulator showcased a focal spot size at the output of less than 1 micrometer.
How can the load during biting be measured?
5 answers
Bite force measurement can be achieved through various innovative devices. One approach involves using a capacitive-type pressure-mapping sensor that accurately converts mechanical forces into capacitance changes, providing a reliable estimation of bite force. Another method includes a low-cost device utilizing a load cell, ergonomic forks with silicone molds, and a microcontroller for subject-specific customization and comfortable force expression, ensuring reliable measurements over time. Additionally, a system with a piezoelectric sensor probe and an adjusting structure allows for efficient bite force detection in rodents, enhancing measurement effectiveness. Dental research emphasizes the importance of bite force evaluation for treatment efficacy, utilizing different transducers like strain gauges, piezoresistive, piezoelectric, and pressure-sensitive films to record and analyze bite forces. These diverse approaches offer clinicians valuable tools for assessing and monitoring bite force accurately in clinical and research settings.
What are the types of pressure sensors commonly used in AIMDs?
5 answers
Common types of pressure sensors used in AIMDs include force sensing resistors (FSRs), capacitive-type pressure sensors, capacitor pressure sensors (CPS), differential pressure transmitters with single crystal structures, MEMS pressure transducers with isolator diaphragms, and laser type pressure sensors. These sensors vary in their design and functionality, with some utilizing novel technologies like artificial neural networks for accurate pressure readouts. Capacitive-type pressure sensors have been developed as alternatives to FSRs due to their improved durability and sensitivity, making them suitable for applications in gait analysis and motion classification for activities of daily living (ADLs). Each type of sensor offers unique advantages in terms of precision, cost-effectiveness, and ease of manufacturing, catering to different requirements in the field of AIMDs.
What is R.Screening?
4 answers
R.Screening refers to various screening methods utilizing the R language for different purposes. In the technical field of networks, an R language-based large-data volume data screening method and system have been developed, allowing users to define screening scripts visually and efficiently screen data stored in the R language server's memory. Additionally, a roller screening machine has been designed for material grading, featuring a unique structure that enhances efficiency, prevents material blockage, and expands the range of screenable materials. Moreover, nutrition screening plays a crucial role in healthcare settings to identify patients at risk of malnutrition, guiding the implementation of appropriate nutrition interventions by Registered Dietitian Nutritionists (RDNs). These diverse applications highlight the versatility and importance of R.Screening in different fields.
How does fractional radiofrequency works?
5 answers
Fractional radiofrequency (FRF) technology delivers electric current and heat to the skin, inducing thermal injury that triggers collagen denaturation and initiates a wound healing response, leading to neo-collagenesis and dermal remodeling. FRF systems, like fractional microneedle radiofrequency (FRM), use insulated microneedles to penetrate the epidermis and deliver radiofrequency energy to the dermis, causing volumetric thermal damage without harming the epidermis. The devices can adjust needle depth, pulse duration, and intensity, allowing for customizable treatments. FRF treatments have shown efficacy in skin tightening, wrinkle reduction, and scar improvement, with common adverse effects being mild pain, erythema, and edema. Understanding the technology and potential adverse effects is crucial for operators to maximize therapy safety and efficacy.