Multi-Band Functional Tunable LH Impedance Transformer

Abdalla, Mahmoud A.; Hu, Zongyang

doi:10.1163/156939309787604652

Cited by 24 publications

(17 citation statements)

References 13 publications

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“…Nonreciprocal devices are important components of the modern microwave systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In order to obtain the nonreciprocal effects one needs to utilize the ferrite materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] or active elements such as amplifiers [19].…”

Section: Introductionmentioning

confidence: 99%

“…In order to obtain the nonreciprocal effects one needs to utilize the ferrite materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] or active elements such as amplifiers [19]. The integrated nonreciprocal devices are in general realized in microstrip [2][3][4][5][6][7][8][9][10][11][12] or slot line [15][16][17][18] technology, with the ferrite material magnetized longitudinally or transversely. Recently, the longitudinally magnetized microstrip [2][3][4][5][6][7][8][9][10][11] or slot [17,18] ferrite coupled lines (FCL) are being developed and employed to realize integrated nonreciprocal devices.…”

Section: Introductionmentioning

confidence: 99%

“…The integrated nonreciprocal devices are in general realized in microstrip [2][3][4][5][6][7][8][9][10][11][12] or slot line [15][16][17][18] technology, with the ferrite material magnetized longitudinally or transversely. Recently, the longitudinally magnetized microstrip [2][3][4][5][6][7][8][9][10][11] or slot [17,18] ferrite coupled lines (FCL) are being developed and employed to realize integrated nonreciprocal devices. Generally, the FCL section is a four port circuit build with a standard coupled lines (CL) composed of three conductors and with ferrite slab located above or below the lines.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of Nonreciprocal Devices Using Three-Strip Ferrite Coupled Line

Marynowski¹,

Mazur²

2011

PIER

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Abstract-This paper presents the investigations of nonreciprocal devices employing a novel ferrite coupled line junction. The structure is designed using coplanar line technology with the ground half-planes reduced to the strips. The investigated junction is composed of one ferrite section placed in between of two dielectric sections. In the ferrite section the longitudinally magnetized ferrite slab is located at the top or the bottom of the strips and is covered with the dielectric layers. In the dielectric sections the ports of the junctions are located. The wave parameters and field distributions of the modes propagated in the dielectric and ferrite sections are obtained from spectral domain approach. In order to determine the scattering matrix of the junction the mode matching method is utilized. The investigation of the circulator and isolator designed based on the Smatrix of the junction are presented. The obtained results are verified by comparing them with HFSS simulations and own measurements of the fabricated devices. In both cases a very good agreement is observed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of Nonreciprocal Devices Using Three-Strip Ferrite Coupled Line

Marynowski¹,

Mazur²

2011

PIER

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“…Nonreciprocal devices have been extensively used in modern microwave and millimeter systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In order to obtain the nonreciprocal effects one needs to utilize the ferrite materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] or active elements such as amplifiers [16].…”

Section: Introductionmentioning

confidence: 99%

“…In order to obtain the nonreciprocal effects one needs to utilize the ferrite materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] or active elements such as amplifiers [16]. Recently, the longitudinally magnetized ferrite coupled strip- [2, 4-10, 15, 17, 18] or slotlines [14,19] are being developed and employed to realize integrated nonreciprocal devices. Significant interest in these devices results from their advantages which are weak biasing magnetic field and wide operation bandwidth [6,10].…”

Section: Introductionmentioning

confidence: 99%

Investigations of Cylindrical Ferrite Coupled Line Junction Using Hybrid Technique

Kusiek¹,

Marynowski²,

Mazur³

2011

PIER

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Abstract-In this paper, a novel longitudinally magnetized cylindrical ferrite coupled line (CFCL) junction is proposed. In comparison to planar ferrite coupled line (FCL) configurations, which are well known in literature, in such structure the higher gyromagnetic coupling occurs. This allows to obtain the required in FCL devices Faraday rotation angle π/4 for the ferrite with shorter length and lower value of magnetization. As a result the total insertion losses in the ferrite section can be reduced using the proposed topology. In the analysis of the proposed CFCL junction a hybrid technique combining method of moments and coupled mode method (MoM/CMM) is applied. The results are compared with the ones obtained from commercial software HFSS and a good agreement is obtained.

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Tunable characteristics of ferrite composite right/left handed coplanar waveguide coupled line coupler – Measurement and experimental verification

Abdalla

2018

AEU - International Journal of Electronics and Communications

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This paper presents the experimental verification of the tunable characteristics of a ferrite composite right/left handed coupled line coupler. The coupler is designed using two coupled CRLH-CRLH transmission lines. The coupler is designed to demonstrate equal through and backward coupling. The novel coupler has been designed and realized in coplanar waveguide configuration on a ferrite substrate. The tunable characteristics are achieved by changing the applied DC magnetic bias to the ferrite substrate. The measurement results reveal that the coupler's fractional bandwidth can be tuned from 29% to 69% by varying the applied DC magnetic bias from 1000 Oe to 1750 Oe. Within the tunable bandwidth, the maximum backward coupling is -5 dB. The coupler has high forward coupling isolation, close to -30 dB at its centre operating frequency. In addition to its tuning capability, the coupler has the advantages of its compact size; it has the length of 11.5 mm and not-so-tight line separations of 2.5 mm. Furthermore the coupler only requires low DC magnetic bias.

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Multi-Band Functional Tunable LH Impedance Transformer

Cited by 24 publications

References 13 publications

Study of Nonreciprocal Devices Using Three-Strip Ferrite Coupled Line

Study of Nonreciprocal Devices Using Three-Strip Ferrite Coupled Line

Investigations of Cylindrical Ferrite Coupled Line Junction Using Hybrid Technique

Tunable characteristics of ferrite composite right/left handed coplanar waveguide coupled line coupler – Measurement and experimental verification

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