Theoretical and experimental treatment of a microstrip coupled ferrite line circulator

Mazur, J.; Solecka, Magdalena; Półtorak, Radosław; Mazur, Mateusz

doi:10.1049/ip-map:20041047

Cited by 16 publications

(17 citation statements)

References 6 publications

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“…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%

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%

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.…”

Section: Introductionmentioning

confidence: 99%

“…This optimal effect is achieved when the ferrite material is placed in the region where the wave is linearly polarized and occurs in cylindrical waveguide with coaxially located ferrite rod or suspended stripline junction. In order to construct devices such as circulators [7,19], gyrators [20] or isolators [17] the FCL section has to be cascaded with reciprocal section providing input signals to the FCL which are either in phase or out of phase.…”

Section: Introductionmentioning

confidence: 99%

“…Promising results concerning low insertion losses and high isolation were obtained for the nonreciprocal devices employing ferrite coupled slotline [19] and stripline junctions [2,7]. For the fabricated devices obtained insertion losses were not lower than 3dB and isolation was better than 12 dB [7,15,19]. Moreover in order to reduce the dimensions of the planar FCL devices in [8] the circulator with appropriate matching networks at the ports ensuring multiple reflections was proposed.…”

Section: Introductionmentioning

confidence: 99%

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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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