Journal ArticleDOI
A $Ka$ -Band Fully Tunable Cavity Filter
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TLDR
In this article, a TE011Ka-band tunable filter with a stable and continuous tuning performance is presented by cascading six-pole pseudo-low-pass and pseudo-high-pass tunable filters.Abstract:
A TE011Ka-band tunable filter with a stable and continuous tuning performance is presented in this paper. Both bandwidth and center-frequency tunability are demonstrated by cascading six-pole pseudo-low-pass and pseudo-high-pass tunable filters. A novel mode-splitter resonator and coupling configuration enabling cross-coupled planar TE011 filter realization is introduced in this paper. The concept can be applied to back-to-back coupled TE011 resonators as well. The filter design is verified through fabrication of multiple tunable filters that demonstrates 500 MHz of tuning range with a stable RF tuning performance.read more
Citations
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Journal ArticleDOI
Reconfigurable Multi-Band Microwave Filters
Abstract: An original and simple approach to the design of fully reconfigurable multi-band microwave bandpass filters (BPFs) with an arbitrary number of passbands is reported in this paper. It exploits the use of an innovative quasi-BPF configuration made up of different sets of controllable mono-frequency resonators to separately shape each tunable passband. Thus, high-selectivity multi-band bandpass filtering transfer functions exhibiting independent control in terms of center frequency, bandwidth, and transmission zeros can be synthesized. Furthermore, as an unprecedented frequency-agility feature of the proposed reconfigurable multi-band BPF structure when compared to the state-of-the-art, its passbands can be merged together to form broader, and for certain realizations, higher order transmission bands. This allows even more degrees of reconfiguration to be achieved in the devised circuit, which can also operate as ultra-wideband BPF with flexible in-band notches or self-equalized flat-group-delay quasi-elliptic-type BPF. The theoretical foundations of the described reconfigurable multi-band BPF scheme, along with guidelines for its design and a triple-passband filter synthesis example based on the coupled-node formalism, are expounded. In addition, as an experimental proof-of-concept, two microstrip prototypes with high- $Q$ tuning implemented through mechanically variable capacitors are manufactured and tested. They are a wideband dual-band BPF and a quadruple-band BPF with narrow-bandwidth passbands.
Journal ArticleDOI
Dual-Band Half Mode Substrate Integrated Waveguide Filter With Independently Tunable Bands
TL;DR: The presented results show the flexibility of the filter to achieve desired responses and its suitability for integration with any tunable planar structure.
Journal ArticleDOI
Integrated microwave photonic filters
TL;DR: The principles, architectures, and superior performance of emerging integrated microwave photonic filters enabled by on-chip linear and nonlinear photonic devices are reviewed.
Journal ArticleDOI
Reconfigurable Waveguide Filter with Variable Bandwidth and Center Frequency
TL;DR: In this paper, a center frequency and bandwidth reconfiguration mechanism for waveguide microwave bandpass filters is presented. But the authors do not consider the problem of adjusting the length of a transmission line, which is equivalent to changing the frequency of a coupling resonator.
Journal ArticleDOI
A Reconfigurable Microwave Combline Filter
TL;DR: A general cascaded filter design technique is implemented to get a tunable narrow-band filter response based on the general Chebyshev bandpass filter.
References
More filters
Journal ArticleDOI
Tunable microwave and millimeter-wave band-pass filters
J. Uher,Wolfgang J. R. Hoefer +1 more
TL;DR: In this article, an overview of tunable microwave and millimeter-wave bandpass filters realized in different technologies is presented, including magnetically tunable filters, magnetostatic-wave filters, evanescent waveguide filters and E-plane printed circuit filters.
Journal ArticleDOI
Power-handling capability for RF filters
TL;DR: In this paper, a simplified method for evaluating the power-handling capability inside an RF filter has been introduced based on the general cross-coupled prototype network theory, modern EM modeling techniques, and well-established breakdown threshold analysis.
Journal ArticleDOI
Waveguide filters for satellites
Vicente E. Boria,Benito Gimeno +1 more
TL;DR: In this paper, the authors describe the historical evolution and its theoretical and technological features of waveguide filters and present the most recent advances in the development of CAD tools for satellite filters, which are based on full-wave electromagnetic analysis methods.
Journal ArticleDOI
Distributed MEMS transmission lines for tunable filter applications
TL;DR: In this article, the authors describe the design and fabrication of a distributed MEMS transmission line DMTL, used to realize a transmission-line with a voltage-variable electrical length for microwave circuits.