Quasistatic dipole in magnetized plasma in resonance frequency band. Response of the receiving antenna, and charge distribution on the antenna wire

The permittivity of a material can be obtained from resonant measurements in an accurate way [1] at a single frequency (where the resonance occurs). In figure (1) results for the Debye Model at 298K temperature can be seen in the 10MHz-50GHz frequency band for distilled water. In this work we explore the possibilities of obtaining the permittivity of materials from resonant measurements in a certain frequency bandwidth around the resonance frequency. With this purpose a Debye model jointly with a certain conductivity useful for polar liquids [1], are studied to evaluate this possibility jointly with inverse techniques.

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LEFT-HANDNESS IN A FOUR-LEVEL ATOMIC SYSTEM

International Journal of Quantum Information ◽

10.1142/s0219749909005390 ◽

2009 ◽

Vol 07 (04) ◽

pp. 747-754 ◽

Cited By ~ 7

Author(s):

SHUNCAI ZHAO ◽

ZHENGDONG LIU

Keyword(s):

Resonance Frequency ◽

Frequency Band ◽

Quantum Coherence ◽

Atomic System ◽

Negative Permittivity ◽

Negative Permeability ◽

Potential Applications

A scheme is proposed for realizing simultaneous negative permittivity and negative permeability based on quantum coherence in a four-level dense atomic system here. Under some parametric conditions the system shows that simultaneous negative permittivity and negative permeability (i.e. Left-handness) can be achieved in a wider frequency band because of quantum coherence. And the novelty properties of gain and dispersion near the resonance frequency may have some potential applications.

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Impact of the Space Charge Distribution in the Model Source of Quasi-Electrostatic Whistler-Mode Waves on the Effective Length of a Short Receiving Antenna

Radiophysics and Quantum Electronics ◽

10.1007/s11141-019-09960-3 ◽

2019 ◽

Vol 62 (2) ◽

pp. 123-132 ◽

Cited By ~ 1

Author(s):

E.A. Shirokov ◽

A. G. Demekhov

Keyword(s):

Space Charge ◽

Charge Distribution ◽

Effective Length ◽

Whistler Mode ◽

Model Source ◽

Receiving Antenna ◽

Space Charge Distribution ◽

Whistler Mode Waves

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Passive Frequency Doubling Antenna Sensor for Wireless Strain Sensing

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring ◽

10.1115/smasis2012-7923 ◽

2012 ◽

Cited By ~ 3

Author(s):

Xiaohua Yi ◽

Chunhee Cho ◽

Yang Wang ◽

Benjamin S. Cook ◽

James Cooper ◽

...

Keyword(s):

Resonance Frequency ◽

Output Signal ◽

Frequency Doubling ◽

Power Source ◽

Strain Sensing ◽

Matching Network ◽

Nonlinear Circuit ◽

Preliminary Measurement ◽

Receiving Antenna ◽

Transmitting Antenna

This paper presents the design, simulation, and preliminary measurement of a passive (battery-free) frequency doubling antenna sensor for strain sensing. Illuminated by a wireless reader, the sensor consists of three components, i.e. a receiving antenna with resonance frequency f0, a transmitting antenna with resonance frequency 2f0, and a matching network between the receiving and transmitting antennas. A Schottky diode is integrated in the matching network. Exploiting nonlinear circuit behavior of the diode, the matching network is able to generate output signal at doubled frequency of the reader interrogation signal. The output signal is then backscattered to the reader through the sensor-side transmitting antenna. Because the backscattered signal has a doubled frequency, it is easily distinguished by the reader from environmental reflections of original interrogation signal. When one of the sensor-side antennas, say receiving antenna, is bonded to a structure that experiences strain/deformation, resonance frequency of the antenna shifts accordingly. Through wireless interrogation, this resonance frequency shift can be measured by the reader and used to derive strain in the structure. Since operation power of the diode is harvested from the reader interrogation signal, no other power source is needed by the sensor. This means the frequency doubling antenna sensor is wireless and passive. Based on simulation results, strain sensitivity of this novel frequency doubling antenna sensor is around −3.84 kHz/με.

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