A nonreciprocal tunable waveguide directional filter using a turnstile open gyromagnetic resonator

Helszajn, J.; Cheng, Ching-Chien; Wilcock, B.A.

doi:10.1109/22.273421

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…This type of directional filter has been realized by stripline [3], microstrip [4], [5], and gyromagnetic resonator with open walls [6] etc. The substrate integrated waveguide (SIW), which can be synthesized in planar substrate with arrays of metallic via by low-cost standard PCB and LTCC fabrication process, has characteristics almost identical to the equivalent conventional metallic waveguide.…”

Section: Introductionmentioning

confidence: 99%

Half Mode Substrate Integrated Waveguide (HMSIW) Directional Filter

Cheng

Wang

2007

IEEE Microw. Wireless Compon. Lett.

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A double-loop directional filter is described and realized in this work by using a novel guided-wave structure called half mode substrate integrated waveguide (HMSIW), which retains the attractive performances of substrate integrated waveguide (SIW) with a nearly half reduction in size compared to the original SIW version. The demonstrated filter is designed at 12 GHz with less than 3.2 dB insertion loss for a 250-MHz bandwidth, and the minimum insertion loss is 1.5 dB. It presents low insertion loss, high power capacity in planar compact configuration with a standard PCB fabrication process.Index Terms-Diplexer, directional coupler, half mode substrate integrated waveguide (HMSIW), traveling-wave ring.

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Section: Introductionmentioning

confidence: 99%

Half Mode Substrate Integrated Waveguide (HMSIW) Directional Filter

Cheng

Wang

2007

IEEE Microw. Wireless Compon. Lett.

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“…A variety of nonreciprocal microwave devices [1][2][3][4][5][6] have been investigated which involve filters with a turnstile open gyromagnetic resonator [2], bidirectional erbium-doped fiber [3], an optically coherent high birefringence fiber transversal filter structure [4], magnetostatic surface wave [6], and involve an fiber Fabry-Perot resonator [1], as well as an orthogonal frequency division multiplexing system [5]. Generally, the asymmetry for FEWs and BEWs originates from time-reversal and space inversion symmetries (TRSIS) breaking due to magnetic materials integrated into the devices.…”

Section: Introductionmentioning

confidence: 99%

A Nonreciprocal Multi-Channel Bandstop Filter Using the Generalized Fibonacci Multiferroic Superlattices With the Silver-Mean Sequence

Tang¹,

Liu²,

Lei³

et al. 2016

PIER M

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Abstract-The generalized Fibonacci multiferroic superlattices (GFMS) are composed of single-phase multiferroic domains with simultaneous polarization and magnetization and are defined by the binary substitutional rule (B −→ B m A, A −→ B, m = 2, 3). We propose to construct a nonreciprocal multichannel bandstop filter by the GFMS. The couplings between electromagnetic waves and lattice vibration of multiferroic material with ferroelectric and ferromagnetic (or antiferromagnetic) orders can be invoked either through piezoelectric or piezomagnetic effects and can lead to the creation of polaritonic band structure. The plane wave expansion method with first-order approximation predicts the existence of multiple band gaps, and electromagnetic waves lying within the band gaps are prohibited, and the band gaps with respect to forward electromagnetic waves (FEWs) and backward electromagnetic waves (BEWs) are asymmetric. The forbidden band structures with FEWs and BEWs are calculated by the transfer matrix method and multiple frequency channels with unidirectional transmission of electromagnetic waves can be further confirmed. Nine and twenty transmission dips in transmission spectra for the BEWs in the frequency range ofω = 0.4-0.6 (17.06 GHz-25.59 GHz) are found in the GFMS with m = 2 and 3, respectively, in which the BEWs are prohibited while the FEWs can travel. Thus, the GFMS has all the conditions for the nonreciprocal multi-channel bandstop filter. Besides, the GFMS can also be applied to construct compact multi-channel one-way electromagnetic waveguides.

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Generators of magnetic groups of symmetry and commutation relations

Dmitriyev

1995

IEEE Trans. Microwave Theory Techn.

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A nonreciprocal tunable waveguide directional filter using a turnstile open gyromagnetic resonator

Cited by 4 publications

References 27 publications

Half Mode Substrate Integrated Waveguide (HMSIW) Directional Filter

Half Mode Substrate Integrated Waveguide (HMSIW) Directional Filter

A Nonreciprocal Multi-Channel Bandstop Filter Using the Generalized Fibonacci Multiferroic Superlattices With the Silver-Mean Sequence

Generators of magnetic groups of symmetry and commutation relations

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