Novel tunable hexaferrite bandpass filter based on open-ended finlines

Sterns, Michael; Rehner, Robert; Schneiderbanger, Dirk; Martius, Siegfried; Schmidt, Lorenz-Peter

doi:10.1109/mwsym.2009.5165777

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…The increasing interest in the development of tunable microwave devices has motivated the study of several approaches, such as the use of ferrite films , microelectromechanical systems or varactor diodes .…”

Section: Introductionmentioning

confidence: 99%

Microwave Tunable Notch Filter Based on Liquid Crystal Using Spiral Spurline Technology

Torrecilla

Ávila-Navarro

Marcos

et al. 2013

Micro & Optical Tech Letters

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ABSTRACT:In this article, the design, fabrication, and characteriza-tion of a tunable microwave notch filter based on liquid crystal (LC) using inverted-microstrip technology is presented. A spiral spurline structure is used because of its good performance as a single-resonator notch filter. Based on the LC dielectric anisotropy, a voltage-controlled rejection frequency of the filter is achieved, ranging from 3.40 to 3.75 GHz, which means that the tuning range relative to the central rejection frequency is about 10%. At the same time, this device exhibits negative group delay around the rejection frequency and the measured values throughout the tuning frequency range are presented.

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Section: Introductionmentioning

confidence: 99%

Microwave Tunable Notch Filter Based on Liquid Crystal Using Spiral Spurline Technology

Torrecilla

Ávila-Navarro

Marcos

et al. 2013

Micro & Optical Tech Letters

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“…The configuration in Fig. 26 was first suggested by Gupta [18] for slotlines and was recently used with finlines [19], [20]. The transition in [21] achieves an output frequency range of 70 to 110 GHz on a low-permittivity substrate.…”

Section: Frequency Tripler (#2)mentioning

confidence: 99%

Design and Fabrication of Broadband Hybrid GaAs Schottky Diode Frequency Multipliers

Hrobak

Sterns

Schramm

et al. 2013

IEEE Trans. Microwave Theory Techn.

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Frequency extender modules of vector network analyzers and signal generators, as well as front-end modules of semiconductor automatic test systems, make use of broadband resistive diode frequency multipliers. This paper presents the design and fabrication of innovative planar varistor frequency multipliers. Three frequency triplers (#1, #2, #3) and two frequency doublers (#4, #5), operating in the 60-110 GHz and 50-110 GHz frequency ranges, respectively, are designed. The hybrid architecture utilizes commercial gallium arsenide Schottky diodes from United Monolithic Semiconductors on thin-film processed high-permittivity alumina substrate. Synthesis is based on a co-simulation procedure between 3-D electromagnetic field and nonlinear harmonic balance circuit simulations. Scalar and spectral measurement data over the focused output frequency ranges are presented. Conversion loss values around 18 dB from 60 to 95 GHz and below 22 dB from 60 to 110 GHz are achieved with frequency tripler #1. Frequency doubler #5 achieves conversion loss values below 15 dB from 50 to 89 GHz and below 22 dB from 50 to 110 GHz. A comprehensive comparison of the presented work with reported frequency multipliers is included.Index Terms-Hybrid multiplier, longitudinal E-field probe, 1.00-mm coaxial connector, planar -band multiplier, Schottky diode frequency multiplier, varistor doubler, varistor tripler.

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“…The growing demand for tunable devices at microwave fre− quencies has motivated the study of some technologies for this purpose, such as ferroelectric materials [1], MEMS [2], etc. Liquid crystals (LC) have become an interesting alter− native for the design of tunable devices.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystal dual-mode band-pass filter with improved performance

Torrecilla

Marcos

Urruchi

et al. 2015

Opto-Electronics Review

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Over the last twenty years, there has been a growing interest in the design of tunable devices at microwave frequencies by us- ing liquid crystals technology. In particular, the use of liquid crystals with high dielectric anisotropy allows manufacturing voltage-controlled devices to operate in a wide frequency range. In this work the frequency response of a liquid crystal band-pass filter with dual-mode microstrip structure has been studied in depth by using a simulation software tool. A reshap- ing of a conventional dual-mode square patch resonator bandpass filter with a square notch, studied in the literature, has been proposed with the goal of improving the filter performance. The main features achieved are a significant increase in the return loss of the filter and a narrowing of a 3-dB bandwidth. Specifically, a reduction in the filter bandwidth from 800 MHz to 600 MHz, which leads to a return loss increase from 6 dB to 12.5 dB, has been achieved. The filter centre frequency can be tuned from 4.54 GHz to 5.19 GHz.

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Novel tunable hexaferrite bandpass filter based on open-ended finlines

Cited by 9 publications

References 4 publications

Microwave Tunable Notch Filter Based on Liquid Crystal Using Spiral Spurline Technology

Microwave Tunable Notch Filter Based on Liquid Crystal Using Spiral Spurline Technology

Design and Fabrication of Broadband Hybrid GaAs Schottky Diode Frequency Multipliers

Liquid crystal dual-mode band-pass filter with improved performance

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