Octave-tunable miniature RF resonators

White, James R.; White, Cheryl; Slocum, Alexander H.

doi:10.1109/lmwc.2005.859012

Cited by 3 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Evanescent-mode cavity resonators have been demonstrated to satisfy these requirements [7], [8]. Filters constructed out of two high-Q evanescent-mode cavities have been reported with narrow bandwidths while maintaining a low loss [9].…”

Section: Introductionmentioning

confidence: 99%

In-situ control of tunable evanescent-mode cavity filters using differential mode monitoring

Sigmarsson¹,

Christianson²,

Joshi³

et al. 2009

2009 IEEE MTT-S International Microwave Symposium Digest

View full text Add to dashboard Cite

In the present work, a method for tracking the center frequency of a widely tunable evanescent-mode cavity filter in-situ is introduced. The goal is to be able to monitor the performance of a filter without disturbing the fields or degrading the quality. The proposed method is to monitor the resonant frequency of each resonator of the filter independently by inducing higher order differential modes. This method enables a continuous feedback loop to lock in the filter center frequency and shape. An example filter is fabricated to demonstrate the concept and tuned from 1.4 to 3 GHz while monitoring the differential mode at 4 to 6.5 GHz. The ability to independently monitor and control the individual resonators in-situ without disturbing the main mode is demonstrated and is a crucial step towards a robust fielded widely tunable filter.

show abstract

Investigation of coupling based on liquid crystal in two end-coupled microstrip resonators

Yazdanpanahi

Mirshekar‐Syahkal

2010

2010 5th International Symposium on Telecommunications

View full text Add to dashboard Cite

Octave-tunable miniature RF resonators

Cited by 3 publications

References 17 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

In-situ control of tunable evanescent-mode cavity filters using differential mode monitoring

Investigation of coupling based on liquid crystal in two end-coupled microstrip resonators

Contact Info

Product

Resources

About