Lumped Parameters of a Reentering Cylindrical Cavity

Rivier, E.; Verge-Lapisardi, M.

doi:10.1109/tmtt.1971.1127504

Cited by 19 publications

(7 citation statements)

References 4 publications

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“…For an equivalent cavity model, it is difficult to be accurately calculated using Maxwell's equations. But when the cavity model dimension meets the condition ≪ ℎ, as shown in Figure 1(a), and the geometric dimension is smaller than the resonant wavelength, we can assume that the high frequency electric field of the cavity dominant mode TM 010 is mainly distributed among the space with height , while the magnetic field is distributed around the embedded cylinder which presents annular concentration [12][13][14] as shown in Figure 1(a). So we obtain the equivalent lumped circuit model in electrostatic field by analysis of the distributed model according to [15].…”

Section: Design Characterization and Fabrication Of The Sensormentioning

confidence: 99%

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

Guo

Tan

et al. 2017

Journal of Sensors

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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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Section: Design Characterization and Fabrication Of The Sensormentioning

confidence: 99%

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

Guo

Tan

et al. 2017

Journal of Sensors

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“…Microwave re-entrant cavities have been studied for over 50 years for a vast variety of applications. Development of more and more accurate structure modelling based on lumped element analysis [63][64][65][66][67] made it very valuable for making small size high-Q resonators. These are designed for filtering applications at room and cryogenic temperatures, 68,69 displacement sensors for gravitational bar detectors [70][71][72] They have also been used to develop Gunn diodes 73 oscillators, electron beam tubes, 74 and millimetre wave resonators.…”

Section: Re-entrant Cavity Modesmentioning

confidence: 99%

Invited Article: Dielectric material characterization techniques and designs of high-Q resonators for applications from micro to millimeter-waves frequencies applicable at room and cryogenic temperatures

Floch

Fan

Humbert

et al. 2014

Review of Scientific Instruments

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Dielectric resonators are key elements in many applications in micro to millimeter wave circuits, including ultra-narrow band filters and frequency-determining components for precision frequency synthesis. Distributed-layered and bulk low-loss crystalline and polycrystalline dielectric structures have become very important for building these devices. Proper design requires careful electromagnetic characterization of low-loss material properties. This includes exact simulation with precision numerical software and precise measurements of resonant modes. For example, we have developed the Whispering Gallery mode technique for microwave applications, which has now become the standard for characterizing low-loss structures. This paper will give some of the most common characterization techniques used in the micro to millimeter wave regime at room and cryogenic temperatures for designing high-Q dielectric loaded cavities.

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“…Measurements have been undertaken and compared with the finite element analysis and the lumped element model [3][4]. Various copper foil gaskets (as shown in figure 5) of a few micrometers thick (with 15% uncertainty) were used to vary the gap spacing by placing the gaskets between the lid of the cavity and the cylindrical wall.…”

Section: B Comparison Between Modeling and Experimentsmentioning

confidence: 99%

“…Microwave re-entrant cavities have been studied over 50 years for a variety of applications. The development of accurate structure modeling based on lumped element analysis [1][2][3][4][5][6][7] has made them very valuable for creating small volume high-Q resonators for filtering applications from room to cryogenic temperatures in comparison with large Whispering Gallery and Bragg mode resonant cavities [6][7][8][9][10][11]. Re-entrant cavities have also been used for producing displacement sensors for gravitational bar detectors [12][13][14][15][16][17], oscillators using Gunn diodes [18] and electron beam tubes [18], and for millimetre wave resonators [20][21].…”

Section: Introductionmentioning

confidence: 99%

Rigorous analysis of highly tunable cylindrical transverse magnetic mode re-entrant cavities

Floch

Fan

Aubourg

et al. 2013

Review of Scientific Instruments

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Cylindrical re-entrant cavities are unique three-dimensional structures that resonate with their electric and magnetic fields in separate parts of the cavity. To further understand these devices, we undertake rigorous analysis of the properties of the resonance using "in-house" developed Finite Element Method (FEM) software capable of dealing with small gap structures of extreme aspect ratio. Comparisons between the FEM method and experiments are consistent and we illustrate where predictions using established lumped element models work well and where they are limited. With the aid of the modeling we design a highly tunable cavity that can be tuned from 2 GHz to 22 GHz just by inserting a post into a fixed dimensioned cylindrical cavity. We show this is possible, as the mode structure transforms from a re-entrant mode during the tuning process to a standard cylindrical transverse magnetic mode.

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Lumped Parameters of a Reentering Cylindrical Cavity

Cited by 19 publications

References 4 publications

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

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

Invited Article: Dielectric material characterization techniques and designs of high-Q resonators for applications from micro to millimeter-waves frequencies applicable at room and cryogenic temperatures

Rigorous analysis of highly tunable cylindrical transverse magnetic mode re-entrant cavities

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