A Novel Passive Wireless Humidity Sensor Based on a Dual-Metal Inductor

2014 ◽  
Vol 609-610 ◽  
pp. 972-976 ◽  
Author(s):  
Guo Li ◽  
Jian Qiu Huang ◽  
Cong Zhang ◽  
Li Feng Wang ◽  
Qing An Huang
Keyword(s):  
Resonant Frequency ◽  
Humidity Sensor ◽  
Metal Structure ◽  
Fabrication Process ◽  
Wireless Applications ◽  
Novel Structure ◽  
Lc Circuit ◽  
Dual Metal

This paper describes a wireless, passive humidity sensor, based upon an inductor-capacitor circuit. An inductor with a dual-metal structure is employed to reduce the size of the chip and decrease the complexity of the process. This paper analyzes the shortcomings of conventional sensors and gives a novel structure to overcome these disadvantages, and also use ADS to simulate and verify the feasibility of the new structure. Finally this paper presents a detail fabrication process of this novel sensor. According to the wireless applications, the LC resonant frequency of the LC circuit was designed at 30 ~ 150 and 350~450MHz.

scholarly journals An Area-efficient Microstrip Diplexer with a Novel Structure and Low Group Delay for Microwave Wireless Applications

2020 ◽  
Vol 8 (2) ◽  
pp. 71-77
Author(s):  
Salah I. Yahya ◽  
Abbas Rezaei
Keyword(s):  
Group Delay ◽  
Design Method ◽  
Wireless Applications ◽  
Novel Structure ◽  
Lc Circuit ◽  
Simulation Results ◽  
Group Delays ◽  
Insertion Losses ◽  
Better Than ◽  
Good Agreement

In this work, a novel structure of a microstrip diplexer consisting of coupled patch cells is presented. It works at 2.5 GHz and 4.7 GHz for wireless applications. The proposed structure is well miniaturized with a compact area of 0.015 λg2, fabricated on 0.787 mm substrate height. It has two wide fractional bandwidths (FBWs) of 28% and 17.9% at the lower and upper channels, respectively. Another feature of the proposed design is the low group delays, which are better than 0.4 ns for both channels. Moreover, the designed diplexer can suppress the harmonics up to 10 GHz. Meanwhile, the insertion losses at both channels are low. The design method is based on proposing an approximated equivalent LC circuit of a novel basic resonator. The information about the resonator behavior is extracted from the even and odd modes analysis of the proposed equivalent LC circuit. Finally, our introduced diplexer is fabricated and measured to verify the simulation results, where the simulated and measured results are in good agreement.

scholarly journals Design and fabrication of a compact microstrip triplexer for wimax and wireless applications

2020 ◽  
Vol 41 (1) ◽  
Author(s):  
Abbas Rezaei ◽  
Salah I. Yahya ◽  
Leila Noori ◽  
Mohd Haizal Jamaluddin
Keyword(s):  
Wireless Applications ◽  
Novel Structure ◽  
Resonance Frequencies ◽  
Coupled Lines ◽  
Insertion Losses

A novel structure to design a microstrip triplexer for wireless and WiMAX applications is presented. To obtain a compact microstrip layout, step impedance resonators and coupled lines are used. The introduced triplexer has a size of 0.35λg×0.26λg, where λg is calculated at 2.3 GHz. Also, the obtained insertion losses are 0.78 dB, 1.1 dB and 0.62 dB at 2.3 GHz, 3.2 GHz and 3.6 GHz, respectively. The LC model of the presented resonator is investigated to tune three resonance frequencies by calculating numerical values of inductors and capacitors. Finally, the designed triplexer is simulated and measured.

Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components

2017 ◽  
Vol 9 (7) ◽  
pp. 1467-1471 ◽  
Author(s):  
Leila Noori ◽  
Abbas Rezaei
Keyword(s):  
General Structure ◽  
Basic Information ◽  
Dual Frequency ◽  
Wireless Applications ◽  
Resonance Frequencies ◽  
Measurement Results ◽  
Coupled Lines ◽  
Lc Circuit ◽  
Insertion Losses ◽  
Good Agreement

In this paper, a microstrip diplexer composed of two similar resonators is designed. The proposed resonator is consisting of four microstrip cells, which are connected to a coupled lines structure. In order to select a suitable geometric structure, first, all cells are assumed as undefined structures where there is a lack of basic information about their geometry and dimensions. Then, an equivalent LC circuit of the coupled lines is introduced and analyzed to estimate the general structure of the resonator respect to a requested resonance frequency. The proposed diplexer is designed to operate at 2.36 and 4 GHz for wireless applications. The insertion losses (S21 and S31) are decreased significantly at the resonance frequencies, so that they are 0.2 and 0.4 dB at 2.36 and 4 GHz, respectively. The designed diplexer is fabricated and measured and the measurement results are in a good agreement with the simulations.

A Novel Silicon Base Piezoresistive Pressure Sensor Using Front Side Etching Process

2003 ◽  
Author(s):  
Chih-Tang Peng ◽  
Ji-Cheng Lin ◽  
Chun-Te Lin ◽  
Kuo-Ning Chiang ◽  
Jin-Shown Shie
Keyword(s):  
Pressure Sensor ◽  
Thermal Loading ◽  
Fabrication Process ◽  
Back Side ◽  
The Novel ◽  
Front Side ◽  
Sensor Performance ◽  
Novel Structure ◽  
Piezoresistive Pressure Sensor ◽  
Packaging Structure

By applying the etching via technology, this study proposes a novel front-side etching fabrication process for a silicon based piezoresistive pressure sensor to replace the conventional backside bulk micro-machining. The distinguishing features of this novel structure are chip size reduction and fabrication costs degradation. In order to investigate the sensor performance and the sensor packaging effect of the structure proposed in this research, the finite element method was adopted for analyzing the sensor sensitivity and stability. The sensitivity and the stability of the novel sensor after packaging were studied by applying mechanical as well as thermal loading to the sensor. Furthermore, the fabrication process and the sensor performance of the novel pressure sensor were compared with the conventional back-side etching type pressure sensor for the feasibility validation of the novel sensor. The results showed that the novel pressure sensor provides better sensitivity than the conventional one, and the sensor output signal stability can be enhanced by better packaging structure designs proposed in this study. Based on the above findings, this novel structure pressure sensor shows a high potential for membrane type micro-sensor application.

scholarly journals Inverted dual U slot loaded truncated microstrip patch antenna for wireless applications

2018 ◽  
Vol 7 (2.21) ◽  
pp. 151
Author(s):  
Kavitha Thandapani ◽  
Shiyamala Subramani
Keyword(s):  
Dielectric Constant ◽  
Resonant Frequency ◽  
Loss Tangent ◽  
Patch Antenna ◽  
Return Loss ◽  
Microstrip Patch Antenna ◽  
Wireless Applications ◽  
Microstrip Patch ◽  
Dielectric Constant And Loss ◽  
Circular Patch Antenna

Dual U Slot Loaded Truncated Microstrip Patch Antenna is designed for wireless applications. The proposed geometry comprised of two inverted U slots in truncated circular patch antenna operation covering 2.24 to 2.72 GHZ frequency bands are obtained. It is found that the slot and truncated is used to improve the bandwidth and return loss respectively. The resonant frequency is found to be 2.5GHZ. The bandwidth of the proposed antenna for lower and upper resonant frequency is found to be 19.2%. The proposed antenna is fed by 50Ω co-axial probe feed and simulated on Rogers RT/duroid5880 substrate.  Rogers RT/duroid 5880 substrate has dielectric constant and loss tangent of 2.2 and 0.0009 respectively. An air gap is used in this proposed design for tuning the desired frequencies and increasing the bandwidth. The antenna shows an acceptable gain of 2.1dB to 5.7dB with unidirectional pattern over the obtained frequency band. 

MEASURING AMPLITUDE AND FREQUENCY CHARACTERISTICS OF KINETIC INDUCTANCE IN SUPERCONDUCTING FILMS

2021 ◽  
Vol 0 (1) ◽  
pp. 106-110
Author(s):  
K.V. SHEIN ◽  
◽  
K.YU. ARUTYUNOV ◽  
V.V. ZAVIALOV ◽  
◽  
...  
Keyword(s):  
Resonant Frequency ◽  
High Frequency ◽  
Response Rate ◽  
Basic Research ◽  
Superconducting Films ◽  
Niobium Nitride ◽  
Kinetic Inductance ◽  
Superconducting Detectors ◽  
Lc Circuit ◽  
On Chip

This research was performed using thin superconducting strips in the shape of tightly packed meanders made of niobium nitride (NbN) ultrathin superconducting strips about 100 nm wide, 5 nm thick and up to 100 µm long. The structures revealed the effect of high kinetic inductance at temperatures lower than the critical temperature. Consideration was given to the temperature dependence of LC-circuit resonant frequency where a highlyinductive superconducting meander was used as a source of L inductance and а chip capacitor as a source of C capacitance. Experimental data point to the fact that kinetic inductance depends on temperature, since there was a shift in the resonant frequency at temperatures lower than the critical one relative to the normal state. This is indicative to the fact that in such systems impedance is changed due to growing kinetic inductance during the transition to the superconducting state. This effect is of relevance both in applied and basic research. When using different superconducting detectors, kinetic inductance can exert a distinct effect on their response rate. In basic research developments, where the on-chip implementation of charge (current) stabilization is required, high frequency impedance of connecting circuits is very useful.

scholarly journals Design of a Humidity Sensor Tag for Passive Wireless Applications

Sensors ◽  
2015 ◽  
Vol 15 (10) ◽  
pp. 25564-25576 ◽  
Author(s):  
Xiang Wu ◽  
Fangming Deng ◽  
Yong Hao ◽  
Zhihui Fu ◽  
Lihua Zhang
Keyword(s):  
Humidity Sensor ◽  
Wireless Applications

scholarly journals Design and Analysis of Patch Antenna for C, X, Ku Band Applications

2021 ◽  
Author(s):  
Shantha Selvakumari R ◽  
Vishnoo Priyaa P
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Return Loss ◽  
Ring Resonator ◽  
Surface Current ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Wireless Applications ◽  
Complementary Split Ring Resonator ◽  
Radar Applications

Abstract This paper presents the design and simulation of patch antenna loaded with metamaterial called Complementary Split Ring Resonator (CSRR) with increased gain and bandwidth suitable for wireless applications such as satellite, TV and radar applications. FR4 substrate with dielectric constant (εr ) of 4.4 is used. The radiating patch consists of CSRR structure fed by microstrip line to achieve triple(C, X, Ku ) band characteristics. The proposed antenna is designed and simulated using Ansys High Frequency Structural Simulator (HFSS). The proposed antenna with 4 rings having a resonant frequency of 7.662, 9.8510, 10.9455, 11.8410, 12.7365 and 13.7315GHz and the bandwidth of 230, 1090, 640, 580, 620 and 2000MHz respectively. The proposed antenna with 6 rings also having a resonant frequency of 7.7615, 9.9525, 11.0450, 11.9405 and13.7315GHz and bandwidth of 160, 1130, 490, 1360 and 1480MHz are achieved. The proposed antenna is analyzed in terms of return loss, VSWR, gain and bandwidth. The electric field and surface current distribution were observed for the proposed antenna having 6 rings.

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