scholarly journals Design of a Ku-band Tile T/R Module

2021 ◽  
Vol 2121 (1) ◽  
pp. 012002
Author(s):  
Yu Zhang ◽  
Hailong Zhao ◽  
Xuefeng Song ◽  
Zenglu Li
Keyword(s):  
Process Optimization ◽  
Structural Design ◽  
High Performance ◽  
Low Cost ◽  
Test Results ◽  
Batch Production ◽  
Module Design ◽  
Technical Indicator ◽  
Structure Layout ◽  
Ku Band

Abstract This paper introduces a 16 channel Ku-band tile T/R module design in 3D highly integrated packaging. The technical indicator design of T/R module is completed by using four channel amplitude phase multifunctional chip and various design methods. Through reasonable indicator distribution and structure layout, the miniaturization design of T/R module is realized by using high-density substrate and 3D interconnection structure. Through process optimization, structural design and simulation verification, the reliability and producibility of T/R module is studied, and the consistency of products is improved. The test results show that the design has good microwave performance and can meet the requirements of high performance, low cost and batch production of Ku-band T/R module.

scholarly journals A Pragmatic and High-Performance Radiative Cooling Coating with Near-Ideal Selective Emissive Spectrum for Passive Cooling

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 144 ◽  
Author(s):  
Mingxue Chen ◽  
Wenqing Li ◽  
Shuang Tao ◽  
Zhenggang Fang ◽  
Chunhua Lu ◽  
...  
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Passive Cooling ◽  
Radiative Cooling ◽  
Test Results ◽  
External Energy ◽  
Functional Nanoparticles ◽  
Space Cooling ◽  
The Universe

Radiative cooling is a passive cooling technology that can cool a space without any external energy by reflecting sunlight and radiating heat to the universe. Current reported radiative cooling techniques can present good outside test results, however, manufacturing an efficient radiative material which can be applied to the market for large-scale application is still a huge challenge. Here, an effective radiative cooling coating with a near-ideal selective emissive spectrum is prepared based on the molecular vibrations of SiOx, mica, rare earth silicate, and molybdate functional nanoparticles. The radiative cooling coating can theoretically cool 45 °C below the ambient temperature in the nighttime. Polyethylene terephthalate (PET) aluminized film was selected as the coating substrate for its flexibility, low cost, and extensive production. As opposed to the usual investigations that measure the substrate temperature, the radiative cooling coating was made into a cubic box to test its space cooling performance on a rooftop. Results showed that a temperature reduction of 4 ± 0.5 °C was obtained in the nighttime and 1 ± 0.2 °C was achieved in the daytime. Furthermore, the radiative cooling coating is resistant to weathering, fouling, and ultraviolet radiation, and is capable of self-cleaning due to its hydrophobicity. This practical coating may have a significant impact on global energy consumption.

Vacuum Packaging for High-Performance Low Cost MEMS Gyro Used in 6 Degree of Freedom Inertial Navigation System (DOF INS)

2011 ◽  
Vol 2011 (1) ◽  
pp. 000627-000634
Author(s):  
D. DeRoo ◽  
K. Shcheglov ◽  
M. Inbar ◽  
D. Smukowski ◽  
P. Zappella ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
High Vacuum ◽  
High Volume ◽  
High Yield ◽  
Test Results ◽  
Batch Fabrication ◽  
Mems Gyroscopes ◽  
Commercial Applications ◽  
The Military

Sensors in Motion Inc. is developing a navigation grade 6 DOF MEMS INS using its proprietary and patented technologies. The military is investing in INS and IMU technology which can answer its needs as well as provide the baseline for hundreds of other DOD and commercial applications which need a C-swap sensitive utility. SIM’s technology for MEMS gyros was conceived to address past problems associated with MEMS gyroscopes while leveraging the C-swap benefits of high volume, high yield batch fabrication, automated packaging, self-calibration, and thermal compensation. A key requirement for the MEMS Gyroscope is controlled vacuum-levels to obtain high Q devices. Gyro die are packaged using a multilayer package and getter system, which provides and maintains sealed vacuum cavities. Die are assembled into the LCC package using conventional assembly techniques and the package cavity is sealed using an SST 3150 high-vacuum sealing system. The SST system is used to activate a thin-film getter layer on the package lid before reflow of the solder seal. Resulting pressure levels have been determined by characterizing packaged but unlidded sensor die in a vacuum chamber. The package material, process flow and test results are summarized and reviewed. Tooling, process parameters, and test techniques are explained.

Preparation and Properties Study of a Low-Cost Ammonia Carboxylate Concrete Superplasticizer

2019 ◽  
Vol 11 (11) ◽  
pp. 1603-1606
Author(s):  
Fankui Zeng ◽  
Junce Zhang ◽  
Xiaoning Wei ◽  
Baoping Li
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
Low Cost ◽  
Reducing Agent ◽  
Test Results ◽  
Optimum Dosage ◽  
Polycarboxylate Superplasticizer ◽  
Gradual Loss ◽  
New Type

Polycarboxylate superplasticizer is the water reducing agent that has the best application prospect in concrete engineering. In this paper, a new type of polycarboxylate superplasticizer is prepared and its properties, such as dispersibility and water-reducing rate in cement particles, slump degree and slump extension in concrete and gradual loss are tested. The test results reveal that the water-reducing agent solves the problem that the traditional polycarboxylate superplasticizer is too sensitive to the change of dosage and that it has good dispersibility to cement particles. The optimum dosage is 2.3%–2.9% and the water-reducing rate is 25.6%–33.0%. The test proves that the high-performance water-reducing agent has a good water-reducing effect. The concrete fluidity of mixed with water-reducing agent is significantly improved and the compressive strength is also improved.

Low Cost Micro-Pump Valve Design

2012 ◽  
Author(s):  
Sina Khalilian ◽  
Simon S. Park ◽  
Theodor Freiheit
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Manufacturing Cost ◽  
Test Results ◽  
Valve Design ◽  
Static Test ◽  
Micro Pump ◽  
Pump Valve ◽  
Novel Method ◽  
Geometrical Dimensions

In order to achieve an overall low cost micro-pump, the valves, a critical micro-pump subcomponent, have been targeted for design for low manufacturing cost, high endurance, and reliability. In the proposed design, the inlet and outlet valves are etched on one piece of planar stainless steel shim stock. To investigate the static and dynamic behaviour of different valves, a design of experiment is performed on the geometrical dimensions of the valves. By using these physical results in a mathematical model for a micro-pump, the effect of valve parameters on micro-pump performance is predicted. Furthermore, a novel method for micro-pump valve selection is developed based on static test results for flow and backflow characteristics of different valves. Applying design for manufacture and mass fabrication techniques, together with an aim for high performance, robustness, and long fatigue life make the proposed valve design applicable to a variety of micro-pump applications.

TSV Interposers With Embedded Microchannels for 3D IC and LED Integration

2011 ◽  
Author(s):  
John Lau ◽  
Heng-Chieh Chien ◽  
Ray Tain
Keyword(s):  
Structural Design ◽  
High Performance ◽  
Low Cost ◽  
Optical Devices ◽  
3D Ic ◽  
Moore’S Law ◽  
Moore's Law ◽  
Fine Pitch ◽  
Silicon Vias ◽  
Cooling Ability

A low-cost (with bare chips), high cooling ability and very low pressure drop 3D IC integration system-in-package (SiP) is designed and described. This system consists of a silicon interposer with through-silicon vias (TSV) and embedded fluidic microchannels, which carries all the Moore’s law chips and optical devices on its top and bottom surfaces. TSVs in the Moore’s law chips are optional but should be avoided. This novel structural design offers potential solutions for high-power, high-performance, high pin-count, ultra fine-pitch, small real-estate, and low-cost 3D IC SiP applications.

Comparison of UV- and Derivative-Spectrophotometric and HPTLC UVDensitometric Methods for the Determination of Amrinone and Milrinone in Bulk Drugs

2020 ◽  
Vol 16 (3) ◽  
pp. 246-253
Author(s):  
Marcin Gackowski ◽  
Marcin Koba ◽  
Stefan Kruszewski
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Low Cost ◽  
Uv Spectra ◽  
Derivative Spectrophotometry ◽  
Therapeutic Monitoring ◽  
Bulk Drug ◽  
Layer Chromatography ◽  
Standard Solutions

Background: Spectrophotometry and thin layer chromatography have been commonly applied in pharmaceutical analysis for many years due to low cost, simplicity and short time of execution. Moreover, the latest modifications including automation of those methods have made them very effective and easy to perform, therefore, the new UV- and derivative spectrophotometry as well as high performance thin layer chromatography UV-densitometric (HPTLC) methods for the routine estimation of amrinone and milrinone in pharmaceutical formulation have been developed and compared in this work since European Pharmacopoeia 9.0 has yet incorporated in an analytical monograph a method for quantification of those compounds. Methods: For the first method the best conditions for quantification were achieved by measuring the lengths between two extrema (peak-to-peak amplitudes) 252 and 277 nm in UV spectra of standard solutions of amrinone and a signal at 288 nm of the first derivative spectra of standard solutions of milrinone. The linearity between D252-277 signal and concentration of amironone and 1D288 signal of milrinone in the same range of 5.0-25.0 μg ml/ml in DMSO:methanol (1:3 v/v) solutions presents the square correlation coefficient (r2) of 0,9997 and 0.9991, respectively. The second method was founded on HPTLC on silica plates, 1,4-dioxane:hexane (100:1.5) as a mobile phase and densitometric scanning at 252 nm for amrinone and at 271 nm for milrinone. Results: The assays were linear over the concentration range of 0,25-5.0 μg per spot (r2=0,9959) and 0,25-10.0 μg per spot (r2=0,9970) for amrinone and milrinone, respectively. The mean recoveries percentage were 99.81 and 100,34 for amrinone as well as 99,58 and 99.46 for milrinone, obtained with spectrophotometry and HPTLC, respectively. Conclusion: The comparison between two elaborated methods leads to the conclusion that UV and derivative spectrophotometry is more precise and gives better recovery, and that is why it should be applied for routine estimation of amrinone and milrinone in bulk drug, pharmaceutical forms and for therapeutic monitoring of the drug.

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