scholarly journals Towards multipixel THz Schottky diode detector with a single RF output line

2021 ◽  
Vol 2086 (1) ◽  
pp. 012063
Author(s):  
A Prikhodko ◽  
I Belikov ◽  
D Mikhailov ◽  
A Shurakov ◽  
G Goltsman
Keyword(s):  
Dynamic Range ◽  
Schottky Diodes ◽  
Performance Tests ◽  
Output Line ◽  
Dual Mode ◽  
Diode Detector ◽  
Pixel Array ◽  
Efficient Coupling ◽  
And Performance ◽  
Bow Tie

Abstract We propose the design of a dual-pixel array of Schottky diodes. Each diode is fixed between the bow-tie antenna arms on top of a SI-GaAs membrane acting as a waveguide backshort for efficient coupling of the antenna to the feedline of high-directivity horn. The detector utilizes a single RF output line: microwave reflectometer is used for the readout. The pixels are equipped with dual-mode resonator filters to eliminate the cross-talk. We evaluate the design proposed via numerical simulation and performance tests of the array subunits: NEP of 300 pW/Hz0.5 and dynamic range of 24 dB are demonstrated at 137.5 GHz.

scholarly journals Interpulse Frequency Diversity System for Second-Trip Suppression and Retrieval in a Weather Radar

2020 ◽  
Vol 37 (11) ◽  
pp. 2085-2099
Author(s):  
V. Chandrasekar ◽  
Mohit Kumar
Keyword(s):  
Doppler Radar ◽  
Dynamic Range ◽  
Weather Radar ◽  
Spectral Width ◽  
Performance Tests ◽  
Frequency Diversity ◽  
Cross Polarization ◽  
Dual Frequency ◽  
And Performance ◽  
Specific Phase

AbstractA new interpulse frequency diverse technique is introduced for weather radar second-trip suppression and retrieval. Interpulse coding is widely used for second-trip suppression or cross-polarization isolation. Here, a new interpulse scheme is discussed, taking advantage of frequency diverse waveforms. The simulations and performance tests are evaluated, keeping in mind NASA dual-frequency, dual-polarization, Doppler radar (D3R). A new method is discussed to recover velocity and spectral width despite the incoherence in samples due to the change of frequency from pulse to pulse. This technique can recover the weather radar moments over a much higher dynamic range of the second-trip contamination than the popular interpulse phase codes, for second-trip suppression and retrieval under specific phase noise conditions. And it has a bigger recovery region of second-trip velocity if the region is drawn with increasing spectral width (compared to other interpulse codes).

A novel, flexible dual-mode power generator adapted for wide dynamic range of the aqueous salinity

Nano Energy ◽  
2021 ◽  
Vol 85 ◽  
pp. 105970
Author(s):  
Lianhui Li ◽  
Shouwei Gao ◽  
Mingming Hao ◽  
Xianqing Yang ◽  
Sijia Feng ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Dual Mode ◽  
Wide Dynamic Range ◽  
Power Generator

scholarly journals Development and performance tests of μ-PIC with DLC electrodes

2020 ◽  
Vol 1498 ◽  
pp. 012001
Author(s):  
A Ochi ◽  
F Yamane ◽  
Y Ishitobi ◽  
H Setsuda
Keyword(s):  
Performance Tests ◽  
And Performance

scholarly journals Optofluidic laser for dual-mode sensitive biomolecular detection with a large dynamic range

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Xiang Wu ◽  
Maung Kyaw Khaing Oo ◽  
Karthik Reddy ◽  
Qiushu Chen ◽  
Yuze Sun ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Large Dynamic Range ◽  
Dual Mode ◽  
Biomolecular Detection

scholarly journals Novel Hexagonal Dual-Mode Substrate Integrated Waveguide Filter with Source-Load Coupling

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Ziqiang Xu ◽  
Gen Zhang ◽  
Hong Xia ◽  
Meijuan Xu
Keyword(s):  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Cavity Structure ◽  
Waveguide Filter ◽  
And Performance ◽  
Single Cavity ◽  
Good Agreement

Hexagonal dual-mode cavity and its application to substrate integrated waveguide (SIW) filter are presented. The hexagonal SIW resonator which can combine flexibility of rectangular cavity and performance of circular cavity is convenient for dual-mode bandpass filters design. By introducing coupling between source and load, the filter not only has good selectivity due to two controllable transmission zeros, but also has a small size by the virtue of its single-cavity structure. A demonstration filter with a center frequency of 10 GHz and a 3 dB fractional bandwidth of 4% is designed and fabricated to validate the proposed structure. Measured results are in good agreement with simulated ones.

KONTRIBUSI PENGUASAAN KALIMAT EFEKTIF TERHADAP KETERAMPILAN MENULIS TEKS EKSPOSISI SISWA KELAS X SMK NEGERI 2 PADANG

2019 ◽  
Vol 8 (3) ◽  
pp. 78
Author(s):  
Diana Citra ◽  
Afnita Afnita
Keyword(s):  
Random Sampling ◽  
Writing Skills ◽  
Sampling Technique ◽  
First Year ◽  
Performance Tests ◽  
First Year Students ◽  
Correlational Design ◽  
Writing Skill ◽  
And Performance ◽  
Descriptive Method

ABSTRACT The purpose of this study was categorized into three. First, to describe the effective sentence mastery of the first year students at SMK Negeri 2 Padang. Second, to describe the writing skills of a exposition of the first year students at SMK Negeri 2 Padang. Third, to describe the contribution of the effective sentence mastery into the writing skills of a exposition text made by the first year students at SMK Negeri 2 Padang. The design of this research was quantitative with a descriptive method. Then, this study also was a correlational design. The population of this study was the first year students at SMK Negeri 2 Padang for about 498 students. The sample of this study was taken by using a proportional random sampling technique (15%), which was 70 students. The data of this study were the results of effective sentence mastery and the results of the writing skill of a exposition text. The instrument of this study was an objective test to measure effective sentence mastery and performance tests to measure expositon text. There were several results of this study. First, the effective sentence mastery of the first year students at SMK Negeri 2 Padang was in Good qualifications (B). Second, the writing skills of a exposition of the first year students at SMK Negeri 2 Padang was in a Good qualification (B). Third, describe the effective sentence mastery contributed 82,00% to the exposition text writing skills of the first year students of SMK Negeri 2 Padang. Kata Kunci: kontribusi, penguasaan kalimat efektif,  keterampilan menulis teks eksposisi 

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