A Frequency Reconfigurable Dielectric Resonator Antenna Using Colloidal Dispersions

Huff, Gregory H.; Rolando, David; Walters, Phillip; McDonald, Jacob Jeremiah

doi:10.1109/lawp.2010.2046613

Cited by 60 publications

(31 citation statements)

References 9 publications

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“…A variable dielectric constant fluid composed of high dielectric particles dispersed in low dielectric oil has been utilized in a tunable dielectric resonator antenna [9], impedance transformer [10], reflect array element [11], and substrate integrated waveguide resonator [12]. This work demonstrates a polarization reconfigurable microstrip patch antenna (PRA) composed of two orthogonally-crossed and co-located narrow microstrip patches with gap discontinuities separating a central probe-fed section from the radiating slots.…”

Section: A Fluidic Loading Mechanism In a Polarizationmentioning

confidence: 99%

A Fluidic Loading Mechanism in a Polarization Reconfigurable Antenna With a Comparison to Solid State Approaches

Barrera

Huff

2014

IEEE Trans. Antennas Propagat.

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This work proposes a polarization-reconfigurable antenna composed of two independent, co-located, and orthogonal ("crossed") narrow microstrip patch antennas with a novel pressure-driven fluidic loading network. Repeating and alternating high-low dielectric constant fluids in the network excite the two patches independently through capacitive coupling. A second iteration of this design with RF PIN diodes allows for a comparison between the fluidic reconfiguration mechanism and current state-of-the-art approaches. Circuit models for the antenna with each reconfiguration mechanism are developed to better understand the impacts on antenna performance. Furthermore, these models show good agreement with full-wave simulations and measured results taken from the two fabricated prototype antennas. Pattern data shows good linear polarization switching with both designs. The two mechanisms are compared based on the impact to electrical size, radiation patterns, efficiency, and switching speed.

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Section: A Fluidic Loading Mechanism In a Polarizationmentioning

confidence: 99%

A Fluidic Loading Mechanism in a Polarization Reconfigurable Antenna With a Comparison to Solid State Approaches

Barrera

Huff

2014

IEEE Trans. Antennas Propagat.

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“…13 Recently, great efforts have been paid on the frequency tunable DRA and various frequency tuning techniques have been exploited. [14][15][16][17][18] For example, the lengths and positions of the parasitic slot and strip can be used to tune the frequency of the DRA. 19,20 However, this approach does not support dynamic frequency tuning.…”

Section: Introductionmentioning

confidence: 99%

Thermally tunable slot-coupled dielectric resonator antenna

Chen

Wang

et al. 2017

AIP Advances

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Absorption enhancement and total absorption in a graphene-waveguide hybrid structure AIP Advances 7, 025101 (2017); https://doi.org/10.1063/1.4975706The influence of the edge effect on the skyrmion generation in a magnetic nanotrack AIP Advances 7, 025105 (2017) A thermally tunable slot-coupled dielectric resonator antenna (DRA) has been designed and prepared by placing a thermosensitive ceramic resonator onto the slot. Typical magnetic resonance occurs in the resonator, which is closely related to its dielectric constant. Because the dielectric constant of the ceramic resonator decreases as the temperature increases, the resonance frequency of the proposed DRA increases as the temperature increases. The simulated results are in good agreement with the measured ones, which confirms the thermally tunable behavior. This approach provides a way for designing the frequency tunable antennas. © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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“…This approach, however, does not support a dynamic frequency tuning. This problem has been resolved in [9] and [10] by using the liquid DRA with a pump, at the cost of increasing the system size. The frequency tuning can alternatively be achieved by using adjustable shorting tabs attached on a DRA side wall [11], giving a wide frequency-tuning range.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Tunable Differentially Fed Rectangular Dielectric Resonator Antennas

Hao

Leung

et al. 2011

Antennas Wirel. Propag. Lett.

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The frequency-tunable differentially fed rectangular dielectric resonator antenna (DRA) loaded by chip capacitors or chip varactors is investigated. Two conducting strips are attached on two opposite DRA side walls for soldering the loading elements. In each loading case, a frequency-tunable DRA with good match and stable radiation patterns can be obtained. Also, the cross-polarized field level is relatively low. Reasonable agreement between the measured and simulated results is obtained. It is found that the frequency tuning ratio can be controlled by the loading elements and the sizes of the DRA and conducting strips. In particular, for the varactor-loaded case, a frequency-reconfigurable DRA can be obtained by varying the biasing voltage of the varactors.

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A Frequency Reconfigurable Dielectric Resonator Antenna Using Colloidal Dispersions

Cited by 60 publications

References 9 publications

A Fluidic Loading Mechanism in a Polarization Reconfigurable Antenna With a Comparison to Solid State Approaches

A Fluidic Loading Mechanism in a Polarization Reconfigurable Antenna With a Comparison to Solid State Approaches

Thermally tunable slot-coupled dielectric resonator antenna

Frequency-Tunable Differentially Fed Rectangular Dielectric Resonator Antennas

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