A wireless passive pressure sensor based on aperture coupled microstrip patch antenna

Purpose This paper aims to present a novel wireless passive pressure sensor based on an aperture coupled microstrip patch antenna embedded with an air cavity for pressure measurement. Design/methodology/approach In this paper, the sensitive membrane deformed when pressure was applied on the surface of the sensor and the relative permittivity of the mixed substrate changed, resulting in a change in the center frequency of the microstrip antenna. The size of the pressure sensor is determined by theoretical calculation and software simulation. Then, the sensor is fabricated separately as three layers using printed circuit board technology and glued together at last. The pressure test of the sensor is carried out in a sealed metal tank. Findings The extracted resonant frequency was found to monotonically shift from 2.219 to 1.974 GHz when the pressure varied from 0 to 300 kPa, leading to an average absolute sensitivity of 0.817 MHz/kPa. Research limitations/implications This pressure sensor proposed here is mainly to verify the feasibility of this wireless passive maneuvering structure, and when the base material of this structure is replaced with some high-temperature-resistant material, the sensor can be used to measure the pressure inside the aircraft engine. Originality/value The sensor structure proposed here can be used to test the pressure in a high-temperature environment when the base material is replaced with some high-temperature-resistant material.

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Highly Sensitive Reentrant Cavity-Microstrip Patch Antenna Integrated Wireless Passive Pressure Sensor for High Temperature Applications

Journal of Sensors ◽

10.1155/2017/3417562 ◽

2017 ◽

Vol 2017 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Fei Lu ◽

Yanjie Guo ◽

Qiulin Tan ◽

Tanyong Wei ◽

Guozhu Wu ◽

...

Keyword(s):

High Temperature ◽

Pressure Sensor ◽

Patch Antenna ◽

Microstrip Patch Antenna ◽

Maximum Pressure ◽

Microstrip Patch ◽

Passive Pressure ◽

Highly Sensitive ◽

Sensor Structure ◽

Temperature Applications

A novel reentrant cavity-microstrip patch antenna integrated wireless passive pressure sensor was proposed in this paper for high temperature applications. The reentrant cavity was analyzed from aspects of distributed model and equivalent lumped circuit model, on the basis of which an optimal sensor structure integrated with a rectangular microstrip patch antenna was proposed to better transmit/receive wireless signals. In this paper, the proposed sensor was fabricated with high temperature resistant alumina ceramic and silver metalization with weld sealing, and it was measured in a hermetic metal tank with nitrogen pressure loading. It was verified that the sensor was highly sensitive, keeping stable performance up to 300 kPa with an average sensitivity of 981.8 kHz/kPa at temperature 25°C, while, for high temperature measurement, the sensor can operate properly under pressure of 60–120 kPa in the temperature range of 25–300°C with maximum pressure sensitivity of 179.2 kHz/kPa. In practical application, the proposed sensor is used in a method called table lookup with a maximum error of 5.78%.

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Flexible EGaIn Liquid Metal Microstrip Patch Antenna Based Pressure Sensor

10.1109/sensors47087.2021.9639625 ◽

2021 ◽

Author(s):

Sheikh Dobir Hossain ◽

Annatoma Arif ◽

Bhushan Lohani ◽

Robert C. Roberts

Keyword(s):

Liquid Metal ◽

Pressure Sensor ◽

Patch Antenna ◽

Microstrip Patch Antenna ◽

Microstrip Patch

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Switchable dual band equilateral triangular microstrip patch antenna using pin diode

International Journal of Pervasive Computing and Communications ◽

10.1108/ijpcc-09-2014-0046 ◽

2015 ◽

Vol 11 (1) ◽

pp. 69-76 ◽

Cited By ~ 1

Author(s):

Prabal Pratap ◽

Ravinder Singh Bhatia ◽

Binod Kumar

Keyword(s):

Resonant Frequency ◽

Patch Antenna ◽

Relative Permittivity ◽

Electrical Characteristic ◽

Surface Current ◽

Microstrip Patch Antenna ◽

Pin Diode ◽

Dual Frequency ◽

Content Type ◽

Microstrip Patch

Purpose – The purpose of this paper is to study and calculate the electrical characteristic of an equilateral triangular microstrip patch antenna that is proposed for dual frequency operation using the pin diode. The electrical characteristic of an equilateral triangular microstrip patch antenna is proposed for dual-frequency operation. Spur lines and ON/OFF condition of the pin diode are utilized to switch the resonant frequency of the patch. The presence of spur lines excites the surface current of the patch which is dependent on the resonant frequency of an equilateral triangular microstrip patch. Insertion of the diode in the spur lines gives a better result and compactness in patch design, which improves the miniaturization in size of patch. Design/methodology/approach – Antenna Design Aspects: A basic structure of an equilateral triangular microstrip antenna (ETMA) having two spur lines and one pin diode positioned in between the spur line is considered in this paper. The design parameters are chosen on the basis of substrate materials having relative permittivity less than three. Specification of the antenna is given in Table I. Substrate material used is RT Duroid 5,880; relative permittivity of the substrate er is 2.2; thickness of dielectric substrate h is 1.5 mm; sides of equilateral triangular patch a are 10 mm, spur width s is 0.5 mm; and spur length b is 2.0 mm. Findings – This paper gives an account of achieving polarization swiftness with coplanar waveguide (CPW) feed. The miniaturized size of the antenna is 35 × 30 mm2. Switchable microstrip equilateral triangular antenna has been demonstrated for dual-frequency operations. The resonant frequency of an ETMA can be adjusted by setting the diode in an ON and OFF state. The design improves the miniaturization in size with a discussion of radiation density. The excited patch surface current is limited to flow around just the mid of the patch in simple ETMA with a single slit cut. It is observed that for an ETMA, when the diode is in the ON state at 9.16 GHz, the excited patch surface current is highly distributed in the patch compared to when the diode is in the ON state at 11 GHz. Similarly, it is observed that the excited surface patch current is highly distributed when the diode is in the OFF state in both frequencies (9 and 11.96 GHz). The mode is changed by the use of a switch at time and it is suitable for wireless communication applications. Originality/value – Spur lines and the ON/OFF condition of the pin diode are utilized to switch the resonant frequency of the patch. The presence of spur lines excites the surface current of the patch which is dependent on the resonant frequency of an equilateral triangular microstrip patch. Insertion of the diode in spur lines gives a better result and compactness in patch design, which improves the miniaturization in size of the patch.

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Patch antenna design optimization using opposition based grey wolf optimizer and map-reduce framework

Data Technologies and Applications ◽

10.1108/dta-06-2019-0084 ◽

2020 ◽

Vol 54 (1) ◽

pp. 103-120

Author(s):

Ramakrishna Guttula ◽

Venkateswara Rao Nandanavanam

Keyword(s):

Patch Antenna ◽

Solution Space ◽

Microstrip Patch Antenna ◽

Superior Performance ◽

Grey Wolf Optimizer ◽

Grey Wolf ◽

Content Type ◽

Microstrip Patch ◽

Proposed Model ◽

Better Than

Purpose Microstrip patch antenna is generally used for several communication purposes particularly in the military and civilian applications. Even though several techniques have been made numerous achievements in several fields, some systems require additional improvements to meet few challenges. Yet, they require application-specific improvement for optimally designing microstrip patch antenna. The paper aims to discuss these issues. Design/methodology/approach This paper intends to adopt an advanced meta-heuristic search algorithm called as grey wolf optimization (GWO), which is said to be inspired by the hunting behaviour of grey wolves, for the design of patch antenna parameters. The searching for the optimal design of the antenna is paced up using the opposition-based solution search. Moreover, the proposed model derives a nonlinear objective model to aid the design of the solution space of antenna parameters. After executing the simulation model, this paper compares the performance of the proposed GWO-based microstrip patch antenna with several conventional models. Findings The gain of the proposed model is 27.05 per cent better than WOAD, 2.07 per cent better than AAD, 15.80 per cent better than GAD, 17.49 per cent better than PSAD and 3.77 per cent better than GWAD model. Thus, it has proved that the proposed antenna model has attained high gain, leads to cause superior performance. Originality/value This paper presents a technique for designing the microstrip patch antenna, using the proposed GWO algorithm. This is the first work utilizes GWO-based optimization for microstrip patch antenna.

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